An automobile headlamp assembling clamp with anti-rotation and multi-dimensional positioning functions

Abstract

The application discloses a car headlamp assembling clamp with anti-rotation and multi-dimensional positioning functions, and relates to the technical field of car assembling clamps.The clamp comprises a mechanical hand assembly and a clamp body hinged to the mechanical hand assembly.A multi-dimensional positioning groove is arranged on the surface of the clamp body for placing a car front combination lamp, and the car front combination lamp is synchronously clamped and fixed by a plurality of side air cylinders.XY-direction centering and positioning components, Z-direction anti-floating clamping components and X-direction anti-rotation clamping components are installed on the periphery of the clamp body.When working, two side fender positioning pins are driven to be inserted into the car body by internal mechanisms to realize double-reference centering; meanwhile, Z-direction side beam positioning blocks and X-direction front baffle anti-rotation positioning blocks are controlled to abut against the side beam of the car body and the front baffle, respectively.The clamp is effectively locked in the spatial deflection and multi-dimensional shifting freedom in the suspended assembling state by the multi-point constraint cooperative action, and the positioning and assembling precision of the car headlamp is improved.

Description

Technical Field

[0001] This application relates to the field of automotive assembly fixture technology, and in particular to an automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions. Background Technology

[0002] Currently, the assembly precision of automotive front combination lights directly affects the vehicle's appearance harmony and driving safety. In automated production lines, robotic arm-assisted suspension assembly has become the mainstream method for headlight installation. As an intermediate transitional component connecting mobile equipment and the vehicle body, the assembly fixture is responsible for supporting the headlights and aligning them with the vehicle body reference. Its spatial constraints and docking method determine the assembly quality at the end of the production line.

[0003] For the aforementioned automated assembly operations, conventional assembly fixtures primarily rely on rigid frames or base plates to support the front combination headlights. The operator places the headlights on the fixture's base plane, using surrounding mechanical stops for physical restraint. The front end of the fixture typically has a single-sided guide pin or fixed positioning rod. The robotic arm moves the fixture to the front of the vehicle body, and the guide pin is inserted into a sheet metal positioning hole on one side of the body to establish assembly coordinates. Subsequently, the operator uses fastening tools to align the mounting holes on the edge of the headlights with the threaded holes on the body and applies torque to lock them in place.

[0004] The existing base plate is not adapted to the external contour of the headlights, and lacks a dedicated contour-following limiting surface on the bearing surface; the headlights are prone to relative sliding after placement, resulting in low initial positioning accuracy. During the body assembly process, the single-sided guide pin only provides a lateral reference for a single position. Due to manufacturing tolerances in the body sheet metal parts, unidirectional positioning cannot drive the fixture to make balanced adjustments based on the actual distance between the two fenders; the final assembly positions of the left and right headlights are prone to lateral asymmetry. At the same time, the existing fixture relies solely on the support surface for gravity support in the vertical direction. There is a lack of a reverse clamping mechanism for the chassis side beams; when the operator applies tightening force, the headlights are prone to shifting along the vertical direction. In addition, the fixture in the suspended posture lacks a multi-directional synchronous limiting structure. The single pin and lift cannot form multi-point constraint locking for the fixture; when interfered by external assembly forces, the fixture body is prone to angular deflection around the vertical central axis. The lack of an anti-rotation structure will cause spatial coordinate shift, resulting in a decrease in overall multi-dimensional positioning accuracy.

[0005] Therefore, the present invention provides an automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions to overcome the shortcomings of the prior art. Summary of the Invention

[0006] The purpose of this invention is to provide an automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions. This invention aims to solve the problem that existing automotive headlight assembly fixtures, due to their single positioning reference and lack of multi-directional anti-float and anti-rotation constraints, are prone to relative sliding, vertical movement, and spatial deflection during the assembly process, resulting in low multi-dimensional assembly positioning accuracy.

[0007] This invention provides the following solution:

[0008] In a first aspect, the present invention provides an automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions, including an integrated robotic arm assembly, wherein the integrated robotic arm assembly is hinged to a fixture body, and the surface of the fixture body is recessed to form a headlight-conforming multi-dimensional positioning groove.

[0009] The fixture body is equipped with an XY-direction centering and positioning component by fasteners. The XY-direction centering and positioning component includes a Y-direction left and right centering mechanism. The two ends of the Y-direction left and right centering mechanism are respectively connected to an XY-direction left fender positioning pin and an XY-direction right fender positioning pin.

[0010] The fixture body is connected to a Z-direction anti-float clamping assembly via a flange surface. The Z-direction anti-float clamping assembly includes a Z-direction vehicle body clamping cylinder, and the output shaft of the Z-direction vehicle body clamping cylinder is fixedly connected to a Z-direction side beam positioning block.

[0011] The fixture body is fixed with an X-axis anti-rotation clamping assembly via a connecting bracket. The X-axis anti-rotation clamping assembly includes an X-axis vehicle body clamping cylinder, and the output shaft of the X-axis vehicle body clamping cylinder is drivenly connected to an X-axis forward baffle anti-rotation positioning block.

[0012] Preferably, the integrated robotic arm assembly includes an aluminum alloy track, in which a hand-pulled trolley is slidably engaged, and the hand-pulled trolley is fixedly connected to one end of a four-bar linkage host, while the other end of the four-bar linkage host is hinged to the fixture body.

[0013] Preferably, a tilting cylinder is connected between the four-bar linkage host and the fixture body, the cylinder barrel of the tilting cylinder is hinged to the four-bar linkage host, and the piston rod of the tilting cylinder is hinged to the fixture body;

[0014] The outer wall of the clamp body is fixedly connected to an operating handle and an operating button box via a bracket; the operating button box integrates a pneumatic control valve group, which is connected to the air inlet of the Z-axis anti-floating clamping assembly and the air inlet of the X-axis anti-rotation clamping assembly, respectively.

[0015] Preferably, the Y-axis left and right centering mechanism is connected to the XY-axis left fender positioning pin and the XY-axis right fender positioning pin via an internal transmission assembly, so as to drive the positioning pins on both sides to perform synchronous displacement.

[0016] Preferably, the outer diameter of the cross-section of the XY-direction left fender positioning pin and the XY-direction right fender positioning pin is set to be 0.1 mm smaller than the inner diameter of the body fender positioning hole, and the manufacturing tolerance of the XY-direction left fender positioning pin and the XY-direction right fender positioning pin is within the range of 0 mm to -0.02 mm.

[0017] Preferably, a linear guide rail is fixed on the main body of the clamp, and the Z-axis side beam positioning block is slidably engaged with the linear guide rail to restrict the Z-axis side beam positioning block from sliding along the vertical Z-axis direction.

[0018] Preferably, an extension guide frame is fixed on the main body of the clamp, the X-axis forward baffle anti-rotation positioning block is slidably connected in the extension guide frame, and the cylinder body of the X-axis vehicle body clamping cylinder is fixed on the extension guide frame.

[0019] Preferably, there is a relative positional tolerance between the clamping working surface of the Z-direction side beam positioning block and the clamping working surface of the X-direction front baffle anti-rotation positioning block, and the value of the relative positional tolerance is less than or equal to 0.1 mm.

[0020] Preferably, the clamp body has a headlight X-axis clamping cylinder and a headlight Y-axis clamping cylinder fixed at the edge of the slot near the headlight contour multi-dimensional positioning groove; the piston rods of the headlight X-axis clamping cylinder and the headlight Y-axis clamping cylinder both penetrate into the receiving cavity of the headlight contour multi-dimensional positioning groove.

[0021] Secondly, the present invention provides an automotive headlight assembly method with anti-rotation and multi-dimensional positioning functions, applied to the aforementioned automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions, comprising the following steps:

[0022] The driving cylinder tilts the fixture body, placing the car's front combination lamp into the headlight contour multi-dimensional positioning groove.

[0023] The headlight X-axis clamping cylinder and headlight Y-axis clamping cylinder extend to fix the front combination lamp of the car, and drive the clamp body to reset;

[0024] Insert the XY-direction left fender positioning pin and the XY-direction right fender positioning pin into the positioning holes of the fender to achieve center positioning;

[0025] The Z-axis side beam positioning block is driven to abut against the vehicle body side beam to prevent floating, and the X-axis front baffle anti-rotation positioning block is driven to abut against the vehicle body front baffle to achieve anti-rotation locking;

[0026] After assembling and securing the front combination lights of the car, control the retraction of each cylinder to release the constraint force, and pull the main body of the clamp back to the initial standby position.

[0027] The above solution achieves the following beneficial technical effects:

[0028] This invention adapts the geometric contour of the combination lamp to the concave structure of the headlight-shaped multi-dimensional positioning groove, and optimizes the insertion trajectory and loading operation of the front combination lamp by using a tilting cylinder to adjust the tilt posture of the fixture body. At the same time, the headlight X-axis and headlight Y-axis clamping cylinders simultaneously press the edge of the combination lamp housing from two vertical axes, limiting the relative sliding of the combination lamp in the groove and improving the positioning and clamping stability of the combination lamp inside the fixture.

[0029] This invention achieves automatic adjustment of the lateral spacing based on the dual references of the left and right fenders of the vehicle body by symmetrically arranging the XY-direction centering and positioning components and driving synchronous displacement through the Y-direction left and right centering mechanism. This enables the fixture body to be automatically centered relative to the longitudinal center plane of the vehicle body when docking with the vehicle body, reducing the positional offset caused by the positioning and fitting gap.

[0030] This invention utilizes the Z-axis side beam positioning block in the Z-axis anti-float clamping assembly to slide vertically along the linear guide rail and press against the bottom of the vehicle body side beam. Combined with the X-axis front baffle anti-rotation positioning block in the X-axis anti-rotation clamping assembly, which is horizontally advanced along the extended guide frame and abuts against the front baffle of the vehicle body, together with the fender positioning pin, to form a multi-point constraint structure. This locks the jig body's movement along the Z-axis and its rotational freedom around the Z-axis, reducing spatial deflection and positional deviation under assembly stress. Attached Figure Description

[0031] Figure 1 This is a side view of the overall structure of the present invention.

[0032] Figure 2 This is an isometric view of the internal details of the clamp body and the headlight clamping assembly of the present invention.

[0033] Figure 3 This is an isometric view of the external vehicle body positioning and centering components of the present invention.

[0034] Figure 4 This is a front view of the bottom Z-axis anti-floating clamping assembly of the present invention.

[0035] Among them, 100 is the integrated robotic arm assembly; 110 is the aluminum alloy track; 120 is the hand-pulled trolley; 130 is the four-bar linkage main unit; 200 is the fixture body; 210 is the headlight contouring multi-dimensional positioning groove; 220 is the flipping cylinder; 230 is the operating handle; 240 is the operating button box; 250 is the headlight X-axis clamping cylinder; 260 is the headlight Y-axis clamping cylinder; 300 is the XY-axis centering and positioning assembly; 310 is the XY-axis left fender positioning pin; 320 is the XY-axis right fender positioning pin; 330 is the Y-axis left and right centering mechanism; 400 is the Z-axis anti-floating clamping assembly; 410 is the Z-axis side beam positioning block; 420 is the Z-axis body clamping cylinder; 500 is the X-axis anti-rotation clamping assembly; 510 is the X-axis front baffle anti-rotation positioning block; and 520 is the X-axis body clamping cylinder. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] See attached document Figure 1 The present invention provides an automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions, comprising: an integrated robotic arm assembly 100 and a fixture body 200, wherein the integrated robotic arm assembly 100 is connected to the fixture body 200 via a hinge shaft.

[0038] The present invention provides an automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions. By integrating a multi-reference collaborative positioning structure, a multi-directional clamping and fixing structure, and an anti-rotation constraint structure, the fixture body 200 and the automotive front combination lamp are restricted in rotational freedom, and multi-dimensional assembly movement paths are controlled, thereby realizing the assembly positioning of the automotive front combination lamp on the automotive body.

[0039] The integrated robotic arm assembly 100 is connected to the gripper body 200 via a hinge shaft. The integrated robotic arm assembly 100 serves as a suspension and movement support component, supporting the gripper body 200 and allowing it to move within the workspace. The gripper body 200 is used to support the automotive front combination lamp and to dock and position it with the external automotive body structure. A headlight-conforming multi-dimensional positioning groove 210 is formed by recesses on the surface of the gripper body 200. The outer contour of the headlight-conforming multi-dimensional positioning groove 210 is adapted to the rear structure of the automotive front combination lamp for accommodating it.

[0040] The fixture body 200 is equipped with an XY-axis centering and positioning component 300 via fasteners. The fixture body 200 is connected to a Z-axis anti-floating clamping component 400 via a flange face. The fixture body 200 is fixed to an X-axis anti-rotation clamping component 500 via a connecting bracket. The XY-axis centering and positioning component 300, the Z-axis anti-floating clamping component 400, and the X-axis anti-rotation clamping component 500 are all fixed to the outer peripheral edge surface of the fixture body 200, forming a modular positioning structure.

[0041] The integrated robotic arm assembly 100 includes an aluminum alloy track 110, a hand-operated trolley 120, and a four-bar linkage 130. The hand-operated trolley 120 is slidably engaged in the guide groove of the aluminum alloy track 110. One end of the hand-operated trolley 120 is fixedly connected to the four-bar linkage 130, and the other end of the four-bar linkage 130 is hinged to the gripper body 200. The aluminum alloy track 110 is horizontally fixed to the upper support beam of the working area. Under driving force, the hand-operated trolley 120 slides horizontally along the guide groove of the aluminum alloy track 110. The four-bar linkage 130 extends vertically downward and includes four linkages arranged in a parallelogram for adjusting the vertical height of the gripper body 200.

[0042] See attached document Figure 2 The present invention provides an automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions, including: a flipping cylinder 220, an operating handle 230, an operating button box 240, a headlight X-axis clamping cylinder 250 and a headlight Y-axis clamping cylinder 260.

[0043] A tilting cylinder 220 is connected between the fixture body 200 and the four-bar linkage host 130. The cylinder of the tilting cylinder 220 is hinged to the four-bar linkage host 130, and the piston rod of the tilting cylinder 220 is hinged to the fixture body 200. An operating handle 230 and an operating button box 240 are fixedly connected to the outer wall of the fixture body 200 through a bracket.

[0044] The piston rod of the tilting cylinder 220 extends and retracts to drive the clamp body 200 to tilt around the hinge axis. By controlling the stroke of the piston rod of the tilting cylinder 220, the tilt posture of the clamp body 200 relative to the vertical plane is adjusted. When the tilting cylinder 220 tilts the clamp body 200 to a 45-degree angle, the opening of the headlight contour multi-dimensional positioning groove 210 tilts upward, an angle used to match the insertion trajectory of the automotive front combination lamp. The operating handle 230 adopts a tubular structure design, allowing the operator to apply force to push the clamp body 200 to move horizontally or vertically in three-dimensional space. The operating button box 240 is fixedly mounted on one side panel of the operating handle 230, and multiple control buttons are arranged on its outer panel.

[0045] The operation button box 240 integrates a pneumatic control valve assembly, which is connected via pneumatic lines to the air inlets of the Z-axis anti-floating clamping assembly 400 and the X-axis anti-rotation clamping assembly 500. Simultaneously, the pneumatic control valve assembly is connected via internal pneumatic distribution lines to the air inlets of the headlight X-axis clamping cylinder 250 and the headlight Y-axis clamping cylinder 260. Pressing the control button on the operation button box 240 triggers the internal valve core of the pneumatic control valve assembly to reverse, controlling the input or output of compressed air to the corresponding cylinder chamber, thereby driving the connected cylinder piston rod to perform an extension clamping action or a retraction release action.

[0046] The internal spatial edge contour of the headlight contouring multi-dimensional positioning groove 210 is adapted to the external geometric contour dimensions of the automotive front combination lamp. The inner wall of the headlight contouring multi-dimensional positioning groove 210 is machined with an inwardly recessed lamp bracket positioning groove. The bottom of the headlight contouring multi-dimensional positioning groove 210 also has a flat support surface corresponding to the fog light mounting surface of the automotive front combination lamp. When the automotive front combination lamp is placed inside the headlight contouring multi-dimensional positioning groove 210, the lamp bracket structure on the automotive front combination lamp housing is embedded in the lamp bracket positioning groove, and the fog light mounting surface on the automotive front combination lamp abuts and fits against the flat support surface. The physical limiting boundaries of the lamp bracket positioning groove and the flat support surface constrain the relative sliding of the automotive front combination lamp on the horizontal and vertical planes.

[0047] The fixture body 200 has a headlight X-axis clamping cylinder 250 and a headlight Y-axis clamping cylinder 260 fixed at the edge of the slot near the headlight contour multi-dimensional positioning groove 210; the piston rods of the headlight X-axis clamping cylinder 250 and the headlight Y-axis clamping cylinder 260 both penetrate into the receiving cavity of the headlight contour multi-dimensional positioning groove 210.

[0048] The number of headlight X-axis clamping cylinders 250 is set to three. These three headlight X-axis clamping cylinders 250 are spaced apart along the edge of the headlight contouring multi-dimensional positioning groove 210 along the X-axis direction. The headlight Y-axis clamping cylinder 260 is located at the edge of the headlight contouring multi-dimensional positioning groove 210 along the Y-axis direction. The outer cylinder barrels of both the headlight X-axis clamping cylinder 250 and the headlight Y-axis clamping cylinder 260 are fixed to the metal frame structure of the clamping body 200 by fastening bolts. When the pneumatic control valve group injects compressed gas into the cylinders, the piston rods of the three headlight X-axis clamping cylinders 250 simultaneously extend along the X-axis into the multi-dimensional positioning groove, and the piston rod of the headlight Y-axis clamping cylinder 260 extends along the Y-axis into the multi-dimensional positioning groove. The piston rod front end pressure plate of the headlight X-axis clamping cylinder 250 and the piston rod front end pressure plate of the headlight Y-axis clamping cylinder 260 abut against and press against the edge of the car front combination lamp housing from two mutually perpendicular axes. The squeezing action after the piston rod extends fixes the car front combination lamp in the headlight contoured multi-dimensional positioning groove 210, restricting the degree of freedom of movement of the car front combination lamp relative to the clamp body 200.

[0049] See attached document Figure 3 The present invention provides an automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions, comprising: an XY-axis centering and positioning component 300 and an X-axis anti-rotation clamping component 500.

[0050] The XY-direction centering and positioning assembly 300 includes an XY-direction left fender positioning pin 310 and an XY-direction right fender positioning pin 320. A Y-direction left and right centering mechanism 330 is provided inside the fixture body 200. The XY-direction left fender positioning pin 310 and the XY-direction right fender positioning pin 320 are respectively connected to the two ends of the Y-direction left and right centering mechanism 330 for transmission.

[0051] The XY-direction left fender positioning pin 310 and XY-direction right fender positioning pin 320 are symmetrically arranged on both sides of the fixture body 200. The Y-direction left and right centering mechanism 330 drives the XY-direction left fender positioning pin 310 and XY-direction right fender positioning pin 320 to perform synchronous displacement through an internal transmission component. When the equipment docks with the vehicle body, the XY-direction left fender positioning pin 310 and XY-direction right fender positioning pin 320 are respectively inserted into the positioning holes of the left and right fenders of the car. The Y-direction left and right centering mechanism 330 then adjusts the relative distance between the two positioning pins, thereby limiting the displacement of the fixture body 200 in the Y-axis direction, so that the fixture body 200 is centered in the Y direction, completing the XY-direction positioning based on dual references.

[0052] The alignment accuracy during equipment docking is controlled by the mating dimensions of the pins and holes. The outer diameter of the cross-section of both the XY-direction left fender positioning pin 310 and the XY-direction right fender positioning pin 320 is set to be 0.1 mm smaller than the inner diameter of the fender positioning hole. The manufacturing tolerances of both pins are within the range of 0 mm to -0.02 mm. This dimensional design ensures that after the XY-direction left fender positioning pin 310 and XY-direction right fender positioning pin 320 are inserted into the fender positioning hole, the mating clearance between the outer wall of the positioning pin and the inner wall of the positioning hole remains within the range of 0.08 mm to 0.1 mm. This mating clearance value limits the lateral movement of the fixture body 200 in the assembled state, reducing headlight Y-direction positional offset caused by excessive positioning clearance.

[0053] The X-axis anti-rotation clamping assembly 500 includes an X-axis forward baffle anti-rotation positioning block 510 and an X-axis vehicle body clamping cylinder 520. The clamping body 200 is fixed with an extension guide frame. The X-axis forward baffle anti-rotation positioning block 510 is slidably connected in the extension guide frame. The cylinder body of the X-axis vehicle body clamping cylinder 520 is fixed on the extension guide frame. The output shaft of the X-axis vehicle body clamping cylinder 520 is drively connected to the X-axis forward baffle anti-rotation positioning block 510.

[0054] The X-axis anti-rotation clamping assembly 500 is positioned corresponding to the location of the front fender of the vehicle body. When the control line inputs air pressure to the X-axis vehicle body clamping cylinder 520, the output axis of the X-axis vehicle body clamping cylinder 520 extends outward, pushing the X-axis anti-rotation positioning block 510 to slide along the extended guide frame towards the front fender of the vehicle body. The front working surface of the X-axis anti-rotation positioning block 510 abuts and presses against the surface of the front fender of the vehicle body, forming a constraint in the X-axis direction. The X-axis clamping force applied by the X-axis anti-rotation positioning block 510 at the front fender of the vehicle body, together with the insertion limit of the XY-axis left fender positioning pin 310 and the XY-axis right fender positioning pin 320 at the fender hole, forms a multi-point constraint structure, which together locks the degree of freedom of the fixture body 200 to rotate around the Z-axis. This constraint structure reduces the horizontal deflection error of the fixture body under suspension and stress assembly conditions.

[0055] See attached document Figure 4 The present invention provides an automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions, including: a Z-axis anti-floating clamping component 400.

[0056] The Z-axis anti-floating clamping assembly 400 includes a Z-axis side beam positioning block 410 and a Z-axis vehicle body clamping cylinder 420. The clamping body 200 is fixed with a linear guide rail. The Z-axis side beam positioning block 410 is slidably fitted on the linear guide rail. The cylinder body of the Z-axis vehicle body clamping cylinder 420 is fixed on the clamping body 200. The output shaft of the Z-axis vehicle body clamping cylinder 420 is fixedly connected to the Z-axis side beam positioning block 410.

[0057] The Z-axis anti-floating clamping assembly 400 is positioned corresponding to the lower side beam of the vehicle body. A linear guide rail guides the movement trajectory of the Z-axis side beam positioning block 410, restricting its sliding along the vertical Z-axis direction. When the pneumatic control system supplies compressed air to the Z-axis body clamping cylinder 420, the output shaft of the cylinder drives the Z-axis side beam positioning block 410 to extend and retract along the linear guide rail in the Z-axis direction. During the positioning and locking action, the Z-axis body clamping cylinder 420 pushes the Z-axis side beam positioning block 410 upwards, causing its clamping working surface to abut and press against the bottom surface of the side beam of the vehicle body. This bottom clamping structure, in conjunction with the upper fender positioning structure, increases the support area of ​​the clamping body 200 and the vehicle body in the Z-axis direction, limiting lateral movement along the Z-axis during assembly.

[0058] The relative positional tolerances between the various actuators affect the stability of the linkage positioning. The Z-axis side beam positioning block 410 in the Z-axis anti-floating clamping assembly 400 has a vertically upward clamping working surface, and the X-axis forward baffle anti-rotation positioning block 510 in the X-axis anti-rotation clamping assembly 500 has a horizontally forward clamping working surface. There is a relative positional tolerance between the clamping working surfaces of the Z-axis side beam positioning block 410 and the X-axis forward baffle anti-rotation positioning block 510, and the value of this relative positional tolerance is less than or equal to 0.1 mm.

[0059] By limiting the relative positional tolerance to within 0.1 mm, when the Z-axis side beam positioning block 410 is in contact with the corresponding body side beam reference surface, the X-axis front baffle anti-rotation positioning block 510 can simultaneously contact the body front baffle reference surface. This tolerance control reduces the problem of unilateral force or suspension of the fixture caused by structural processing or equipment assembly errors, avoids geometric interference between the Z-axis anti-floating limit action and the X-axis anti-rotation limit action, and ensures the locking accuracy of the fixture in multi-dimensional space.

[0060] See attached document Figure 1 To be continued Figure 4 This invention provides a method for assembling automotive headlights with anti-rotation and multi-dimensional positioning functions, applied to an automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions, comprising the following steps:

[0061] The tilting cylinder 220 tilts the fixture body 200, placing the automotive front combination lamp into the headlight contour multi-dimensional positioning groove 210. Specifically, during the initial positioning and loading stage, the operator sends a tilting trigger signal to the system via the control panel on the operation button box 240. Upon receiving this signal, the control circuit drives the piston rod of the tilting cylinder 220 to extend. The linear motion of the piston rod of the tilting cylinder 220 is converted into rotational motion of the fixture body 200 about its hinge axis with the four-bar linkage 130. The fixture body 200 rotates from a vertical reference posture to a tilted posture, with the tilt angle set at 45°, providing the operator with loading space to place the automotive front combination lamp into the fixture. When the fixture body 200 reaches the set tilt position, the operator places the automotive front combination lamp to be assembled into the headlight contour multi-dimensional positioning groove 210. The external geometric contour of the automotive front combination lamp fits into the concave bearing surface of the headlight contour multi-dimensional positioning groove 210. The fog light positioning surface and bracket positioning groove structure inside the headlight contour multi-dimensional positioning groove 210 restrict the relative sliding of the automotive front combination lamp in the groove, thus completing the initial positioning of the automotive front combination lamp on the fixture.

[0062] The headlight X-axis clamping cylinder 250 and headlight Y-axis clamping cylinder 260 extend to secure the automotive front combination lamp, causing the clamp body 200 to reset. Specifically, the operator presses the headlight clamping execution button on the operation button box 240. The pneumatic control valve group inside the operation button box 240 opens the air supply circuit, simultaneously injecting compressed air into the headlight X-axis clamping cylinder 250 and headlight Y-axis clamping cylinder 260. The piston rods of the headlight X-axis clamping cylinder 250 and the headlight Y-axis clamping cylinder 260 extend inward simultaneously, pressing against the edge of the automotive front combination lamp housing, fixing the automotive front combination lamp inside the clamp body 200. The operator sends a flip reset signal again, the piston rod of the flip cylinder 220 retracts, causing the clamp body 200, along with the automotive front combination lamp fixed thereon, to rotate back to the vertical mounting reference posture.

[0063] The XY-direction left fender positioning pin 310 and XY-direction right fender positioning pin 320 are inserted into the positioning holes of the fenders to achieve centering. Specifically, after entering the body docking and spatial positioning stage, the operator holds the operating handle 230 and pushes the fixture body 200 along the aluminum alloy track 110. The hand-pulled trolley 120 rolls along the guide groove of the aluminum alloy track 110, guiding the four-bar linkage main unit 130 and the fixture body 200 to the front station of the car body to be assembled on the production line. The operator aligns the XY-direction centering and positioning component 300 at the front end of the fixture body 200 with the left and right fender areas of the car body. The operator presses down and pushes forward the operating handle 230, so that the XY-direction left fender positioning pin 310 and XY-direction right fender positioning pin 320 are aligned and inserted into the positioning holes of the left and right fenders of the car body, respectively. Since the XY-direction left fender positioning pin 310 and XY-direction right fender positioning pin 320 are both connected to the two ends of the Y-direction left and right centering mechanism 330, the insertion depth of the positioning pins on both sides remains synchronously linked. By adjusting the lateral position of the fixture body 200 in the Y-axis direction, the fixture body 200 is centered relative to the longitudinal center plane of the vehicle body, thus establishing the assembly position reference for the X-axis and Y-axis planes.

[0064] The Z-axis side beam positioning block 410 abuts against the vehicle body side beam to prevent floating, and the X-axis front baffle anti-rotation positioning block 510 abuts against the vehicle body front baffle to achieve anti-rotation locking. Specifically, after the positioning pin is inserted, the operator touches the Z-axis locking button on the operation button box 240. The pneumatic control valve group switches the air circuit to supply air to the Z-axis anti-floating clamping assembly 400. The output shaft of the Z-axis vehicle body clamping cylinder 420 extends, driving the Z-axis side beam positioning block 410 to slide upward along the linear guide rail at the lower end of the clamp body 200. The upward clamping working surface of the Z-axis side beam positioning block 410 abuts against the bottom reference surface of the vehicle body side beam and applies an upward clamping force. This upward clamping structure cooperates with the fender positioning pin to form multi-point support in the Z-axis direction, reducing the movement error along the Z-axis direction when the clamp body 200 is suspended. During the anti-rotation locking and final assembly stage, the operator touches the X-axis locking button on the operation button box 240. The pneumatic control valve assembly supplies air to the X-axis anti-rotation clamping assembly 500. The output shaft of the X-axis body clamping cylinder 520 extends, driving the X-axis front fender anti-rotation positioning block 510 to translate along the extended guide frame towards the vehicle body. The clamping working surface on the front side of the X-axis front fender anti-rotation positioning block 510 abuts against the reference surface of the front fender of the vehicle body. The supporting reaction force of the X-axis front fender anti-rotation positioning block 510 in the X-axis direction, combined with the shearing limit of the XY-axis left fender positioning pin 310 and XY-axis right fender positioning pin 320 in the fender positioning hole, constitutes a mechanical constraint on the Z-axis rotational degree of freedom. At this time, the various translational and rotational degrees of freedom of the fixture body 200 in the spatial coordinate system are locked, constraining the spatial position deviation and ensuring that the front combination lamp of the vehicle is in the set assembly target coordinate position.

[0065] After assembling and securing the front combination lamp, the cylinders are retracted to release the constraint force, pulling the clamp body 200 back to its initial standby position. Specifically, in the locked state, the operator uses an electric tightening device to pass the fasteners through the mounting holes of the front combination lamp and screw them into the corresponding threaded holes on the body. After the tightening operation is completed, the front combination lamp is fixed to the body sheet metal, and the headlight assembly process is completed. Entering the mechanism reset and unloading stage, the operator presses the headlight release button on the operation button box 240. The pneumatic control valve group controls the headlight X-direction clamping cylinder 250 and the headlight Y-direction clamping cylinder 260 to exhaust air and supply air in the reverse direction. The piston rods of the corresponding cylinders retract, releasing the clamping force on the front combination lamp body. Subsequently, the operator presses the body release button, and the pneumatic control valve group controls the output shafts of the Z-direction body clamping cylinder 420 and the X-direction body clamping cylinder 520 to retract. Z-axis side beam positioning block 410 disengages from the vehicle body side beam, and X-axis front baffle anti-rotation positioning block 510 disengages from the vehicle body front baffle, releasing the constraint between the fixture body 200 and the vehicle body. The operator pulls the operating handle 230 backward, causing the XY-axis left fender positioning pin 310 and XY-axis right fender positioning pin 320 to straight out of the positioning holes in the vehicle body fender. The operator continues to pull the fixture body 200, causing it to return to its initial standby position along the aluminum alloy track 110. After receiving the fixture return signal, the production line control system controls the material conveying equipment to move the vehicle with the completed headlight assembly out of the current workstation. The fixture body 200 and its supporting mechanisms enter the system standby state, ready to execute the next headlight assembly positioning cycle.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A car headlight assembly fixture with anti-rotation and multi-dimensional positioning functions, characterized in that, It includes an integrated robotic arm assembly (100), which is hinged to a clamp body (200), and the surface of the clamp body (200) is recessed to form a headlight-shaped multi-dimensional positioning groove (210). The fixture body (200) is equipped with an XY-direction centering and positioning component (300) by fasteners. The XY-direction centering and positioning component (300) includes a Y-direction left and right centering mechanism (330). The two ends of the Y-direction left and right centering mechanism (330) are respectively connected to an XY-direction left fender positioning pin (310) and an XY-direction right fender positioning pin (320). The clamp body (200) is connected to a Z-direction anti-float clamping assembly (400) via a flange face. The Z-direction anti-float clamping assembly (400) includes a Z-direction vehicle body clamping cylinder (420). The output shaft of the Z-direction vehicle body clamping cylinder (420) is fixedly connected to a Z-direction side beam positioning block (410). The clamp body (200) is fixed with an X-direction anti-rotation clamping assembly (500) by a connecting bracket. The X-direction anti-rotation clamping assembly (500) includes an X-direction vehicle body clamping cylinder (520). The output shaft of the X-direction vehicle body clamping cylinder (520) is connected to an X-direction front baffle anti-rotation positioning block (510).

2. The automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions according to claim 1, characterized in that, The integrated robotic arm assembly (100) includes an aluminum alloy track (110), in which a hand-pulled trolley (120) is slidably engaged. The hand-pulled trolley (120) is fixedly connected to one end of a four-bar linkage host (130), and the other end of the four-bar linkage host (130) is hinged to the fixture body (200).

3. The automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions according to claim 2, characterized in that, A tilting cylinder (220) is connected between the four-bar linkage host (130) and the clamp body (200). The cylinder barrel of the tilting cylinder (220) is hinged to the four-bar linkage host (130), and the piston rod of the tilting cylinder (220) is hinged to the clamp body (200). The outer wall of the clamp body (200) is fixedly connected to the operating handle (230) and the operating button box (240) by the bracket; the operating button box (240) integrates a pneumatic control valve group, which is connected to the air inlet of the Z-direction anti-floating clamping assembly (400) and the air inlet of the X-direction anti-rotation clamping assembly (500) respectively.

4. The automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions according to claim 1, characterized in that, The Y-axis left and right centering mechanism (330) is connected to the XY-axis left fender positioning pin (310) and the XY-axis right fender positioning pin (320) through an internal transmission component, so as to drive the positioning pins on both sides to perform synchronous displacement.

5. A car headlight assembly fixture with anti-rotation and multi-dimensional positioning functions according to claim 4, characterized in that, The outer diameter of the cross-section of the XY-direction left fender positioning pin (310) and the XY-direction right fender positioning pin (320) is set to be 0.1 mm smaller than the inner diameter of the positioning hole of the vehicle body fender. The manufacturing tolerance of the XY-direction left fender positioning pin (310) and the XY-direction right fender positioning pin (320) is within the range of 0 mm to -0.02 mm.

6. The automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions according to claim 1, characterized in that, A linear guide rail is fixed on the fixture body (200), and the Z-axis side beam positioning block (410) is slidably engaged on the linear guide rail, restricting the Z-axis side beam positioning block (410) from sliding along the vertical Z-axis direction.

7. A car headlight assembly fixture with anti-rotation and multi-dimensional positioning functions according to claim 1, characterized in that, An extension guide frame is fixed on the main body (200) of the clamp, the X-axis forward baffle anti-rotation positioning block (510) is slidably connected in the extension guide frame, and the cylinder body of the X-axis vehicle body clamping cylinder (520) is fixed on the extension guide frame.

8. A car headlight assembly fixture with anti-rotation and multi-dimensional positioning functions according to claim 7, characterized in that, The clamping working surface of the Z-direction side beam positioning block (410) and the clamping working surface of the X-direction front baffle anti-rotation positioning block (510) have a relative position tolerance, the value of which is less than or equal to 0.1 mm.

9. A car headlight assembly fixture with anti-rotation and multi-dimensional positioning functions according to claim 1, characterized in that, The fixture body (200) has a headlight X-axis clamping cylinder (250) and a headlight Y-axis clamping cylinder (260) fixed at the edge of the slot near the headlight contour multi-dimensional positioning groove (210); the piston rods of the headlight X-axis clamping cylinder (250) and the headlight Y-axis clamping cylinder (260) both penetrate into the receiving cavity of the headlight contour multi-dimensional positioning groove (210).

10. A method for assembling an automotive headlight with anti-rotation and multi-dimensional positioning functions, characterized in that, The automotive headlight assembly fixture with anti-rotation and multi-dimensional positioning functions as described in any one of claims 1 to 9 includes the following steps: The drive cylinder (220) tilts the fixture body (200) and places the car front combination lamp into the headlight contour multi-dimensional positioning groove (210); The headlight X-axis clamping cylinder (250) and headlight Y-axis clamping cylinder (260) extend to fix the front combination lamp of the car, and drive the clamp body (200) to reset; Insert the XY-direction left fender positioning pin (310) and the XY-direction right fender positioning pin (320) into the positioning holes of the fender to achieve center positioning; Drive the Z-axis side beam positioning block (410) to abut against the vehicle side beam to prevent floating, and drive the X-axis front baffle anti-rotation positioning block (510) to abut against the vehicle front baffle to achieve anti-rotation locking; After assembling and securing the front combination lights of the car, control each cylinder to retract to release the constraint force, and pull the main body of the clamp (200) back to the initial standby position.

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