Aluminum alloy rear floor frame welding tool

Abstract

The utility model relates to automobile rear floor processing technical field and disclose a kind of car aluminum alloy rear floor frame welding tool, including bottom support, the position fixedly connected with two support rods in the upper surface one side of bottom support, for supporting the one end of vertical frame, the position fixedly connected with two round tubes in the upper surface other side of bottom support, two The round tube is slidably connected with round bar in, for supporting the other end of vertical frame, the middle position fixedly connected with intermediate support plate in bottom support, the upper surface fixedly connected with electric push rod of intermediate support plate.The utility model adopts the mode of "one side fixed support rod, one side adjustable round bar" to stably support vertical frame, and the jacking height of transverse frame is accurately controlled by electric push rod, ensure that vertical and transverse frame are closely adhered in preset accurate position, provide reliable guarantee for completing high-quality, low-deformation welding.

Description

Technical Field

[0001] This utility model relates to the field of automotive rear floor processing technology, and more specifically to a welding fixture for an aluminum alloy rear floor frame. Background Technology

[0002] The rear floor frame of an automobile is a core load-bearing and structural component of the body-in-white, and its welding quality directly affects the vehicle's safety, rigidity, and NVH (noise, vibration, and harshness) performance. With the popularization of automotive lightweighting technology, aluminum alloy materials, due to their low density and high strength, have been widely used in the manufacture of rear floor frames.

[0003] Currently, in the welding and assembly process of aluminum alloy rear floor frames, the vertical and horizontal frames are generally placed on the ground and welded manually. However, this welding method cannot guarantee that the joint between the horizontal frame and the two vertical frames is always in the optimal welding position, which can easily cause serious quality problems such as welding deformation, uneven welds, or even false welds. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a welding fixture for an aluminum alloy rear floor frame of a vehicle to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a welding fixture for an aluminum alloy rear floor frame, including a bottom support. Two support rods are fixedly connected to one side of the upper surface of the bottom support for supporting one end of the vertical frame. Two round tubes are fixedly connected to the other side of the upper surface of the bottom support, and round rods are slidably connected inside each of the two round tubes for supporting the other end of the vertical frame. A middle support plate is fixedly connected to the middle position of the bottom support. An electric push rod is fixedly connected to the upper surface of the middle support plate. A top plate is fixedly connected to the telescopic end of the electric push rod. A support frame is fixedly connected to the upper surface of the top plate for supporting the transverse frame.

[0006] As a further embodiment of this utility model, the support frame is a contour-following structure, and the upper surface of the support frame is completely fitted with the top wall of the concave cavity of the transverse frame.

[0007] As a further embodiment of this utility model, the top end of the support rod is provided with a threaded groove, and a locking screw is internally threaded to the threaded groove, and the locking screw passes through a hole at one end of the vertical frame. The top end of the round rod is provided with a threaded groove, and a locking screw is internally threaded to the threaded groove, and the locking screw passes through a hole at the other end of the vertical frame.

[0008] As a further embodiment of this utility model, the upper surface of the support frame is provided with at least three screw holes, and a locking knob is threaded into the screw holes. The locking knob passes through the hole on the transverse frame and cooperates with the support frame to fix the transverse frame.

[0009] As a further embodiment of this utility model, the outer circumference of the circular tube is provided with a plurality of pin holes arranged in a vertical array, and the outer circumference of the circular rod is provided with a plurality of through holes that cooperate with the pin holes.

[0010] As a further embodiment of this utility model, two telescopic rods are fixedly connected between the lower surface of the top plate and the upper surface of the intermediate support plate, and the two telescopic rods are respectively located on both sides of the electric push rod.

[0011] As a further embodiment of this utility model, the outer circumference of the round rod is provided with scale lines to indicate the extension length of the round rod.

[0012] As a further embodiment of this invention, the lower surface of the bottom support is provided with multiple adjustable feet for adjusting the levelness of the tooling.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. The tooling adopts a "fixed support rod on one side and adjustable round rod on the other side" method to stably support the vertical frame, and uses an electric push rod to precisely control the lifting height of the horizontal frame, ensuring that the vertical and horizontal frames fit tightly in the preset precise position, providing a reliable guarantee for completing high-quality, low-deformation welding.

[0015] 2. This utility model, by setting an adjustable round rod with scale lines and engaging with a pin hole, can quickly and accurately adjust the height of one side support to adapt to vertical frames of different specifications. At the same time, it uses an electric push rod to drive the contour support frame for lifting and positioning, replacing the traditional manual adjustment and alignment, greatly shortening the preparation time for workpiece clamping and fixing, and improving the efficiency of welding production.

[0016] 3. The top of the support rod and the round rod of this utility model are vertically pressed from above the workpiece by locking screw one and locking screw two respectively. The locking knob on the support frame is also operated from above. All clamping points operate in the same direction, with ample space, making it convenient for workers to use tools or tighten quickly by hand. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention.

[0018] Figure 2 This is a structural diagram of the bottom support of this utility model.

[0019] Figure 3 This is a schematic diagram of the support frame of this utility model.

[0020] Figure 4 This is a diagram of the rear floor frame of this utility model.

[0021] The attached diagram is labeled as follows: 1. Bottom bracket; 2. Support rod; 3. Round tube; 4. Intermediate support plate; 5. Threaded groove one; 6. Locking screw one; 7. Pin hole; 8. Round rod; 9. Threaded groove two; 10. Locking screw two; 11. Electric push rod; 12. Top plate; 13. Support frame; 14. Screw hole; 15. Locking knob; 16. Telescopic rod. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Reference Figures 1-4 This utility model provides a welding fixture for an aluminum alloy rear floor frame of a vehicle, including a bottom support 1. Two support rods 2 are bolted to one side of the upper surface of the bottom support 1 to support one end of the vertical frame. Two round tubes 3 are bolted to the other side of the upper surface of the bottom support 1. Round rods 8 are slidably connected inside each of the two round tubes 3 to support the other end of the vertical frame. A middle support plate 4 is bolted to the middle of the bottom support 1. An electric push rod 11 is bolted to the upper surface of the middle support plate 4. A top plate 12 is bolted to the telescopic end of the electric push rod 11. A support frame 13 is bolted to the upper surface of the top plate 12 to support the horizontal frame.

[0024] It should be noted that the electric push rod 11 can be used with a magnetic switch, proximity switch or photoelectric switch to achieve precise control of the push rod's extension and retraction displacement. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0025] The tooling uses a combination of a fixed support rod 2 on one side and an adjustable round rod 8 on the other side to provide stable support for the vertical frame. The lifting height of the horizontal frame is precisely controlled by an electric push rod 11, ensuring that the vertical and horizontal frames fit tightly in the preset precise position, providing a reliable guarantee for completing high-quality, low-deformation welding.

[0026] The lower surface of the bottom support 1 is provided with multiple adjustable feet to adjust the level of the tooling. The outer circumference of the round rod 8 is provided with scale lines to indicate the extension length of the round rod 8. The outer circumference of the round tube 3 is provided with multiple pin holes 7 in a vertical array. The outer circumference of the round rod 8 is provided with multiple through holes that mate with the pin holes 7.

[0027] By setting an adjustable round rod 8 with scale lines to cooperate with the pin hole 7, the height of one side support can be quickly and accurately adjusted to adapt to vertical frames of different specifications. At the same time, the electric push rod 11 drives the contour support frame 13 for lifting and positioning, replacing the traditional manual adjustment and alignment, greatly shortening the preparation time for workpiece clamping and fixing, and improving the efficiency of welding production.

[0028] Pull out the round rod 8 to adjust its height extending from the round tube 3 to fit the frame size. The scale lines on the outer wall of the round rod 8 provide a precise visual reference for height adjustment. After adjusting to the predetermined position, use a pin to pass through the corresponding pin hole 7 and through hole on the round tube 3 and the round rod 8 to lock and fix the round rod 8.

[0029] Furthermore, the support frame 13 is a contour-following structure, and the upper surface of the support frame 13 is completely fitted with the top wall of the concave cavity of the transverse frame. It can be accurately inserted into and fitted with the top wall of the concave cavity of the transverse frame, thereby forming a stable support for the transverse frame with a large supporting area.

[0030] In this utility model, the top end of the support rod 2 is provided with a threaded groove 5, and a locking screw 6 is threadedly connected to the threaded groove 5. The locking screw passes through a hole at one end of the vertical frame. The top end of the round rod 8 is provided with a threaded groove 9, and a locking screw 10 is threadedly connected to the threaded groove 9. The locking screw 10 passes through a hole at the other end of the vertical frame.

[0031] In this application, the inner walls of thread groove 1 5 and thread groove 2 9 are axially provided with annular grooves, and a nylon 66 damping ring with a Shore hardness of 85A is embedded in the groove. The continuous axial clamping force generated by its elastic deformation forms a helical angle interference fit of 15°-20° with the surfaces of locking screw 1 6 and locking screw 2 10. When the threaded pair is subjected to axial vibration load, the nylon insert can generate a maximum elastic compression of 0.3mm, which increases the friction coefficient between the thread contact surfaces from 0.15 to 0.68 (tested according to ASTM D1894 standard), effectively suppressing loosening displacement caused by thread springback.

[0032] First, place one end of each of the two vertical frames on the top of the two support rods 2. Then, pass the locking screw 6 through the pre-drilled hole at the end of the vertical frame from above and screw it into the threaded groove 5 at the top of the support rod 2, thereby firmly pressing the end onto the support rod 2. At the same time, place the other ends of the two vertical frames on the top of the two round rods 8. Then, use the locking screw 10 to pass through the pre-drilled hole at the other end of the frame and screw it into the threaded groove 9 at the top of the round rod 8 to complete the pressing and fixing of the other end of the vertical frame.

[0033] In particular, the upper surface of the support frame 13 is provided with at least three screw holes 14, and the screw holes 14 are internally threaded with locking knobs 15. The locking knobs 15 pass through the holes on the transverse frame and cooperate with the support frame 13 to fix the transverse frame.

[0034] In this application, an annular groove is provided axially on the inner wall of the screw hole 14, and a nylon 66 damping ring with a Shore hardness of 85A is embedded in the groove. The continuous axial clamping force generated by its elastic deformation forms a helical angle interference fit with the surface of the locking knob 15 at 15°-20°. When the threaded pair is subjected to axial vibration load, the nylon insert can generate a maximum elastic compression of 0.3mm, which increases the friction coefficient between the thread contact surfaces from 0.15 to 0.68 (tested according to ASTM D1894 standard), effectively suppressing loosening displacement caused by thread springback.

[0035] The tops of the support rod 2 and the round rod 8 are vertically pressed from above the workpiece by locking screw 6 and locking screw 10 respectively. The locking knob 15 on the support frame 13 is also operated from above. All clamping points operate in the same direction, with ample space, making it convenient for workers to quickly tighten using tools or by hand.

[0036] Place the transverse frame onto the support frame 13, then thread one end of the locking knob 15 through the pre-drilled hole on the transverse frame and thread it into the screw hole 14 to secure the transverse frame. Then activate the electric push rod 11 to retract, causing the transverse frame to move down until it is lifted to the ideal welding position where it is fully fitted with the vertical frames on both sides, at which point welding can be performed.

[0037] In this utility model, two telescopic rods 16 are fixedly connected between the lower surface of the top plate 12 and the upper surface of the intermediate support plate 4 by bolts, and the two telescopic rods 16 are located on both sides of the electric push rod 11.

[0038] The use of this utility model involves the following steps:

[0039] S1: First, place one end of each of the two vertical frames on the top of the two support rods 2. Then, pass the locking screw 6 through the pre-drilled hole at the end of the vertical frame from above and screw it into the threaded groove 5 at the top of the support rod 2, thereby firmly pressing the end onto the support rod 2. At the same time, place the other end of each of the two vertical frames on the top of the two round rods 8. Then, use the locking screw 10 to pass through the pre-drilled hole at the other end of the frame and screw it into the threaded groove 9 at the top of the round rod 8 to complete the pressing and fixing of the other end of the vertical frame.

[0040] S2: Pull out the round rod 8 to adjust its height extending from the round tube 3 to fit the frame size. The scale lines on the outer wall of the round rod 8 provide a precise visual reference for height adjustment. After adjusting to the predetermined position, use a pin to pass through the corresponding pin hole 7 and through hole on the round tube 3 and the round rod 8 to lock and fix the round rod 8.

[0041] S3: Place the transverse frame on the support frame 13, then thread one end of the locking knob 15 through the pre-drilled hole on the transverse frame and thread it into the screw hole 14 to finally fix the transverse frame firmly. Then start the electric push rod 11 to retract, so that the transverse frame moves down until the transverse frame is lifted to the ideal welding position that is completely in contact with the vertical frames on both sides, and then the welding operation can be carried out.

[0042] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0043] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0044] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A welding fixture for an aluminum alloy rear floor frame of a vehicle, comprising a bottom support (1), characterized in that: Two support rods (2) are fixedly connected to one side of the upper surface of the bottom support (1) to support one end of the vertical frame. Two round tubes (3) are fixedly connected to the other side of the upper surface of the bottom support (1). Round rods (8) are slidably connected inside the two round tubes (3) to support the other end of the vertical frame. A middle support plate (4) is fixedly connected to the middle position of the bottom support (1). An electric push rod (11) is fixedly connected to the upper surface of the middle support plate (4). A top plate (12) is fixedly connected to the telescopic end of the electric push rod (11). A support frame (13) is fixedly connected to the upper surface of the top plate (12) to support the horizontal frame.

2. The welding fixture for an aluminum alloy rear floor frame of a vehicle according to claim 1, characterized in that: The support frame (13) is a contour-following structure, and the upper surface of the support frame (13) is completely in contact with the top wall of the concave cavity of the transverse frame.

3. The welding fixture for an aluminum alloy rear floor frame of a vehicle according to claim 1, characterized in that: The top of the support rod (2) is provided with a threaded groove (5), and a locking screw (6) is threadedly connected to the threaded groove (5). The locking screw passes through a hole at one end of the vertical frame. The top of the round rod (8) is provided with a threaded groove (9), and a locking screw (10) is threadedly connected to the threaded groove (9). The locking screw (10) passes through a hole at the other end of the vertical frame.

4. The welding fixture for an aluminum alloy rear floor frame of a vehicle according to claim 2, characterized in that: The upper surface of the support frame (13) is provided with at least three screw holes (14), and a locking knob (15) is threaded into the screw holes (14). The locking knob (15) passes through the hole on the transverse frame and cooperates with the support frame (13) to fix the transverse frame.

5. The welding fixture for an aluminum alloy rear floor frame of a vehicle according to claim 1, characterized in that: The outer circumference of the tube (3) is vertically arrayed with multiple pin holes (7), and the outer circumference of the rod (8) is provided with multiple through holes that cooperate with the pin holes (7).

6. The welding fixture for an aluminum alloy rear floor frame of a vehicle according to claim 1, characterized in that: Two telescopic rods (16) are fixedly connected between the lower surface of the top plate (12) and the upper surface of the intermediate support plate (4), and the two telescopic rods (16) are located on both sides of the electric push rod (11).

7. The welding fixture for an aluminum alloy rear floor frame of a vehicle according to claim 3, characterized in that: The outer circumference of the round rod (8) is provided with scale lines to indicate the extension length of the round rod (8).

8. The welding fixture for an aluminum alloy rear floor frame of a vehicle according to claim 1, characterized in that: The lower surface of the bottom support (1) is provided with multiple adjustable feet for adjusting the level of the tooling.

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