A lower frame assembly line

Abstract

This utility model relates to the field of tooling positioning technology and discloses a tooling assembly for a lower frame assembly, including: a tooling chassis, guide rails are provided on the front and rear of the top left side of the tooling chassis, a positioning component one is movably mounted on the guide rails, a positioning component two is symmetrically arranged on the front and rear of the top center of the tooling chassis, limiters are provided at the four corners of the top positioning component two of the tooling chassis, a positioning component four is symmetrically arranged on the left and right sides of the top of the tooling chassis, and a positioning component three is fixedly arranged on the top right side of the tooling chassis. Positioning components one, two, three, and four are used to position the left, bottom, right, and side beams of the lower frame workpiece, respectively. The positioning components one, two, three, and four can reduce welding defects caused by positioning deviations and improve welding quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tooling positioning technology, specifically to a tooling assembly for lower frame assembly. Background Technology

[0002] In the field of machinery manufacturing, the underframe, as a crucial load-bearing component of various vehicles and large equipment, directly affects the overall operational safety and service life of the equipment due to its structural stability and assembly precision. In the production process of the underframe, assembly welding is one of the key procedures, and precise positioning before welding is the core prerequisite for ensuring welding quality.

[0003] Existing underframe assembly tooling typically uses only the left and right sides and four corners for positioning the underframe workpiece. While this positioning structure can meet basic welding requirements to a certain extent and ensure that the workpiece does not shift significantly during welding, it has limitations. Because underframe workpieces are often large and heavy, and are subject to thermal stress and other factors during welding, relying solely on positioning from the left and right sides and four corners can easily lead to positioning misalignment after prolonged use.

[0004] If the positioning is off, it will not only lead to misalignment of the welding interface and out-of-tolerance dimensional accuracy, but may also require a lot of correction work later, which will seriously affect production efficiency and product quality, and may even pose safety hazards due to non-compliant structural dimensions. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a lower frame assembly tooling assembly.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A lower frame assembly tooling assembly includes: a tooling chassis; guide rails are provided at the front and rear of the top left side of the tooling chassis; a positioning component one is movably mounted on the guide rails; a positioning component two is symmetrically arranged at the front and rear of the top center of the tooling chassis; limiters are provided at the four corners of the positioning component two on the top of the tooling chassis; positioning components four are symmetrically arranged on the left and right sides of the top of the tooling chassis; and a positioning component three is fixedly arranged on the top right side of the tooling chassis. Positioning components one, two, three, and four are used to position the left, bottom, right, and side beams of the lower frame workpiece, respectively.

[0007] Preferably, the positioning component is symmetrically arranged on the front and rear sides. The positioning component includes: a movable frame, a guide rail groove at the bottom of the movable frame for movable engagement with the guide rail, a buffer rod at the center of the bottom of the movable frame, the other end of the buffer rod being fixedly connected to the base plate of the tooling chassis, multiple sets of cylindrical pins at the top right of the movable frame, a support pad fixedly arranged between the front and rear movable frames, multiple sets of shims at the top of the support pad, and cylindrical pins used to fix the workpiece of the lower frame.

[0008] Preferably, the positioning component three includes: a support column, which is set on the front and rear sides of the top of the tooling chassis. A support square tube is horizontally set on the top of the support column. A connector one and a connector two are set on the right side of the support square tube. A pin is fixedly set on the right side of the support square tube and the top of the tooling chassis. The top of the pin is movably connected to the connector one. The connector two is used to connect and fix to the right end of the workpiece on the lower frame.

[0009] Preferably, the positioning component two is symmetrically arranged on the front and rear sides. The positioning component two includes: a fixed seat, which is fixed on the front and rear sides of the top of the tooling chassis. A connecting piece three is fixedly arranged on the fixed seat. A fixed frame is fixedly arranged in the center of the top positioning component two of the tooling chassis. A damping cylinder is fixedly arranged on the left side of the fixed frame. The telescopic rod of the damping cylinder is fixedly connected to the right side of the fixed frame. The connecting piece three is used to connect, position and fix with the workpiece of the lower frame.

[0010] Preferably, the positioning component four includes: a support base one, a support base two is provided on the right side of the support base one, the support base one and the support base two are fixed on the top of the tooling chassis, the top of the support base one is provided with a pin, the pin is provided with multiple sets of pins, the pins are used to connect and fix with the workpiece of the lower frame.

[0011] Compared with the prior art, this utility model provides a lower frame assembly tooling assembly, which has the following beneficial effects: Positioning component one positions the left side of the underframe workpiece. Its movable design along the guide rail can adapt to the left-side positioning requirements of workpieces of different sizes. Combined with the cylindrical pin and the shims of the support pad, it ensures the stability of the left-side positioning. Positioning component two focuses on positioning the bottom of the workpiece. Through the coordinated action of the connector on the fixed seat and the damping cylinder, it can firmly fix the bottom position and buffer the stress during welding, preventing bottom positioning deviation. Positioning component three precisely positions the right side of the workpiece. The combination structure of the supporting square tube and pin provides reliable support and fixing points for the right side. Positioning component four positions the side beams of the workpiece. The multiple pin designs of the pin components can adapt to different connection positions of the side beams. This multi-component collaborative positioning method covers the left, bottom, right, and side beams of the underframe workpiece. Compared with existing technologies that only provide positioning on the left and right sides and four corners, it achieves all-round constraint from planar to three-dimensional, significantly improving positioning stability.

[0012] Stable positioning ensures accurate alignment of welded joints, reduces welding defects caused by positioning deviations, and improves welding quality and efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a top view schematic diagram of the structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the positioning component one in this utility model; Figure 4 This is a three-dimensional structural diagram of positioning component three in this utility model; Figure 5 This is a three-dimensional structural diagram of positioning component four in this utility model; Figure 6 This is a three-dimensional structural diagram of positioning component two in this utility model; Figure 7 This is an exploded three-dimensional structural diagram of the present invention and the workpiece; Figure 8 This is a three-dimensional structural diagram of the present invention and the workpiece assembly.

[0014] The components include: 1. Tooling chassis; 101. Guide rail; 102. Limiting component; 2. Positioning component one; 201. Moving frame; 202. Cylindrical pin; 203. Shim; 204. Support pad; 205. Buffer rod; 3. Positioning component three; 301. Support column; 302. Support square tube; 303. Connector two; 304. Connector one; 305. Pin; 4. Positioning component four; 401. Support seat one; 402. Support seat two; 403. Insert pin; 5. Positioning component two; 501. Fixed seat; 502. Fixed frame; 503. Connector three; 504. Damping cylinder; 6. Lower frame workpiece. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Reference Figures 1-8As shown, a lower frame assembly tooling assembly in this embodiment includes a tooling chassis 1. The tooling chassis 1 serves as the basic load-bearing component of the entire tooling assembly, providing a stable installation platform for each positioning component. Its structural strength is directly related to the reliability of the overall positioning.

[0017] The tooling chassis 1 has guide rails 101 installed on both the front and rear of its left top edge. Positioning components 1 and 2 are movably mounted on the guide rails 101. The cooperation between the guide rails 101 and positioning components 1 and 2 provides guidance for the movement of positioning components 1 and 2, allowing them to flexibly adjust their position according to the dimensions of the lower frame workpiece 6. Positioning components 2 and 5 are symmetrically arranged at the front and rear of the top center of the tooling chassis 1. Positioning components 2 and 5 provide precise positioning for the bottom of the lower frame workpiece 6, ensuring the stability of the workpiece bottom. Limiting elements 102 are installed at the four corners of the positioning components 2 and 5 on the top of the tooling chassis 1. The limiting elements 102 further restrict the position of the lower frame workpiece 6, preventing unnecessary movement during processing. Positioning components 4 are symmetrically arranged on the left and right sides of the top of the tooling chassis 1. Positioning components 4 and 4 position the side beams of the lower frame workpiece 6, ensuring accurate positioning of the side beams. Positioning component 3 is fixedly installed on the top right side of the tooling chassis 1. Positioning component 3 provides fixed support for the right side of the workpiece 6 on the lower frame and works in conjunction with other positioning components to achieve overall positioning of the workpiece.

[0018] The positioning component 2 is symmetrically arranged on both the front and rear sides. It includes a movable frame 201, the bottom of which has a guide rail groove that movably engages with the guide rail 101, allowing the movable frame 201 to move smoothly along the guide rail 101. A buffer rod 205 is also provided at the center of the bottom of the movable frame 201. The other end of the buffer rod 205 is fixedly connected to the base plate of the tooling chassis 1, providing a buffering effect and reducing impact when the movable frame 201 moves. Multiple sets of cylindrical pins 202 are provided on the top right side of the movable frame 201. The cylindrical pins 202 are used to fix the lower frame workpiece 6, ensuring the stability of the left side of the workpiece. A support pad 204 is fixedly provided between the front and rear movable frames 201. Multiple sets of shims 203 are provided on the top of the support pad 204. The height of the shims 203 can be adjusted according to actual needs to accommodate lower frame workpieces 6 of different thicknesses.

[0019] Positioning component 3 includes a support column 301, which is located on the front and rear sides of the top of the tooling chassis 1, providing stable support for positioning component 3. A support square tube 302 is horizontally installed on the top of the support column 301. Connector 1 304 and connector 2 303 are installed on the right side of the support square tube 302. A pin 305 is fixedly installed on the right side of the support square tube 302 and the top of the tooling chassis 1. The top of the pin 305 is movably connected to connector 1 304, allowing connector 1 304 to be flexibly adjusted in angle. Connector 2 303 is used to connect and fix to the right end of the workpiece 6 on the lower frame, ensuring accurate positioning of the right side of the workpiece.

[0020] Positioning component two 5 is symmetrically arranged on its front and rear sides. It includes a fixed base 501, which is fixed to the front and rear sides of the top of the tooling chassis 1. A connecting component three 503 is fixedly installed on the fixed base 501. The connecting component three 503 is used to connect, position and fix with the lower frame workpiece 6. A fixed frame 502 is fixedly installed in the center of the top positioning component two 5 of the tooling chassis 1. A damping cylinder 504 is fixedly installed on the left side of the fixed frame 502. The telescopic rod of the damping cylinder 504 is fixedly connected to the right side of the fixed frame 502. The damping cylinder 504 can provide a stable thrust, enhancing the fixing effect on the bottom of the lower frame workpiece 6.

[0021] Positioning component 4 includes a support base 401, and a support base 402 is provided on the right side of the support base 401. The support base 401 and the support base 402 are fixed to the top of the tooling chassis 1, providing reliable support for positioning component 4. A pin 403 is provided on the top of the support base 401. The pin 403 is provided with multiple sets of pins, which are used to connect and fix with the lower frame workpiece 6. The appropriate pin can be selected for fixing according to the structural characteristics of the side beam.

[0022] In some examples, a reinforcing plate is provided between the fixing seat 501 of the positioning component 2 5 and the tooling chassis 1. The reinforcing plate can enhance the connection strength between the fixing seat 501 and the tooling chassis 1 and prevent the fixing seat 501 from loosening during long-term use.

[0023] In some examples, the tooling chassis 1 is provided with multiple weight-reducing holes. These holes reduce the overall weight while ensuring the structural strength of the tooling chassis 1, making it easier to handle and install.

[0024] The working principle of this utility model is as follows: When using this type of underframe assembly tooling, a flat work site must first be selected, and the tooling chassis 1 should be placed stably to ensure the overall stability using its own structure.

[0025] Next, the positioning components are debugged and prepared. For positioning component 2, based on the left side dimensions of the lower frame workpiece 6, the moving frame 201 is pushed to move along the guide rail 101 to the appropriate position. During the movement, the buffer rod 205 at the bottom of the moving frame 201 will act as a buffer to reduce the impact during movement. At the same time, according to the thickness of the lower frame workpiece 6, shims 203 are added or removed from the top of the support pad 204 to ensure that the support height is appropriate. For positioning component 5, check whether the connector 3 503 on the fixed seat 501 is installed firmly. Adjust the position of the fixed frame 502 through the damping cylinder 504 so that it can fit well with the bottom of the lower frame workpiece 6. For positioning component 3, based on the structure of the right side of the lower frame workpiece 6, adjust the angle and position of connector 1 304 and connector 2 303. The scale markings on the support square tube 302 can assist in accurate positioning, ensuring that the pin 305 is firmly connected to connector 1 304. For positioning component 4, based on the structure of the side beam of the lower frame workpiece 6, select a suitable pin on pin component 403 to ensure that the pin can be reliably connected to the side beam.

[0026] After the debugging of each positioning component is completed, the lower frame workpiece 6 is placed on the tooling assembly. At this time, the cylindrical pin 202 on the top of positioning component one 2 is inserted into the corresponding hole on the left side of the lower frame workpiece 6 to achieve left-side positioning; the connecting part three 503 of positioning component two 5 is connected to the bottom of the lower frame workpiece 6, and the damping cylinder 504 provides stable thrust to firmly fix the bottom position; the connecting part two 303 of positioning component three 3 is connected and fixed to the right side end of the lower frame workpiece 6, and the supporting square tube 302 and the supporting column 301 provide solid support; the pin on the pin part 403 of positioning component four 4 is connected to the side beam of the lower frame workpiece 6 to complete the side beam positioning. At the same time, the limiting parts 102 at the four corners of the positioning component two 5 on the top of the tooling chassis 1 further restrict the position of the lower frame workpiece 6 to prevent unnecessary movement during processing.

[0027] During the welding process, the various positioning components work together to provide comprehensive constraints on the lower frame workpiece 6. Positioning component 1 2, through the cooperation of the movable frame 201 and the guide rail 101, can adapt to the slight positional adjustments that may occur during the welding process, and the buffer rod 205 can reduce the impact of welding stress on the left-side positioning; the damping cylinder 504 of positioning component 2 5 can buffer the stress generated by welding and prevent bottom positioning deviation; the movable connection between the pin 305 of positioning component 3 and the connecting piece 1 304 can absorb the force generated by welding deformation to a certain extent and ensure the stability of the right-side positioning; the wear-resistant pin of positioning component 4 ensures that the side beam maintains an accurate position throughout the welding process.

[0028] After the work is completed, loosen the connection between each positioning component and the workpiece 6 on the lower frame, and the machined workpiece can be removed. Because the tooling chassis 1 has multiple weight-reduction holes, the overall weight is relatively light, facilitating later maintenance and upkeep.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lower frame assembly alignment tooling assembly, comprising: include: Tooling chassis (1), with guide rails (101) on the front and back of the top left side of tooling chassis (1), and positioning component one (2) movably mounted on the guide rails (101), positioning component two (5) symmetrically mounted on the center front and back of the top of tooling chassis (1), and limiting components (102) mounted at the four corners of positioning component two (5) on the top of tooling chassis (1), positioning component four (4) symmetrically mounted on the left and right sides of the top of tooling chassis (1), and positioning component three (3) fixedly mounted on the right side of the top of tooling chassis (1). Positioning component one (2), positioning component two (5), positioning component three (3) and positioning component four (4) are respectively used to position the left, bottom, right and side beams of the lower frame workpiece (6).

2. The lower frame assembly of claim 1, wherein, The positioning component 1 (2) is symmetrically arranged on the front and rear sides. The positioning component 1 (2) includes: a movable frame (201), a guide rail groove is provided at the bottom of the movable frame (201), the guide rail groove is used to movably cooperate with the guide rail (101), a buffer rod (205) is also provided at the center of the bottom of the movable frame (201), the other end of the buffer rod (205) is fixedly connected to the bottom plate of the tooling chassis (1), multiple sets of cylindrical pins (202) are provided on the top right side of the movable frame (201), a support pad (204) is fixedly provided between the front and rear movable frames (201), multiple sets of pads (203) are provided on the top of the support pad (204), and the cylindrical pins (202) are used to fix the lower frame workpiece (6).

3. The lower frame assembly of claim 1, wherein, Positioning component three (3) includes: a support column (301), the support column (301) is set on the front and rear sides of the top of the tooling chassis (1), the top of the support column (301) is horizontally provided with a support square tube (302), the right side of the support square tube (302) is provided with a connector one (304) and a connector two (303), the right side of the support square tube (302) and the top of the tooling chassis (1) are fixedly provided with a pin (305), the top of the pin (305) is movably connected to the connector one (304), and the connector two (303) is used to connect and fix to the right end of the lower frame workpiece (6).

4. The lower frame assembly of claim 1, wherein, The positioning component two (5) is symmetrically arranged on the front and rear sides. The positioning component two (5) includes: a fixed seat (501), which is fixed on the front and rear sides of the top of the tooling chassis (1). A connecting part three (503) is fixedly arranged on the fixed seat (501). A fixed frame (502) is fixedly arranged in the center of the top positioning component two (5) of the tooling chassis (1). A damping cylinder (504) is fixedly arranged on the left side of the fixed frame (502). The telescopic rod of the damping cylinder (504) is fixedly connected to the right side of the fixed frame (502). The connecting part three (503) is used to connect, position and fix with the workpiece (6) of the lower frame.

5. The lower frame assembly of claim 1, wherein, The positioning component four (4) includes: support base one (401), support base two (402) is provided on the right side of support base one (401), support base one (401) and support base two (402) are fixed on the top of the tooling chassis (1), and a pin part (403) is provided on the top of support base one (401). Multiple sets of pins are provided on the pin part (403), and the pins are used to connect and fix with the lower frame workpiece (6).

Images