CNC machining fixture for new energy automobile battery tray cross beam

Abstract

The utility model provides a kind of CNC mechanical processing fixture for new energy automobile battery tray crossbeam, and battery tray crossbeam includes left casting, intermediate section bar and right casting, this CNC mechanical processing fixture includes bridge plate mechanism, left positioning mechanism for the positioning of left casting, right positioning mechanism for the positioning of right casting, left clamping mechanism for clamping and fixing left casting, right clamping mechanism for clamping and fixing right casting;Left positioning mechanism, right positioning mechanism, left clamping mechanism and right clamping mechanism are all fixed on bridge plate mechanism.The utility model solves the technical problem of how to overcome the existing new energy automobile battery tray crossbeam casting machining allowance in prior art, cannot meet its dimensional accuracy requirement, difficult to position and control deformation.

Description

Technical Field

[0001] This utility model relates to the technical field of tooling fixtures for machining, and in particular to a CNC machining fixture for a crossbeam of a battery tray for new energy vehicles. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the demand for battery pack production is increasing. As a key component of the entire battery pack, the battery tray beam directly affects the overall rigidity and collision safety of the battery pack, thus impacting the safety and range of the entire vehicle. Traditional battery tray beams use aluminum extrusion profiles, which have poor rigidity and are prone to deformation after a collision. They also lack targeted collision energy optimization design, making it difficult to effectively absorb energy in frontal impacts, thus threatening battery pack safety. Therefore, there is an urgent need for a battery tray beam structure and manufacturing process that balances lightweight design, high integration, and high safety.

[0003] The crossbeam of the new energy battery tray is mainly made of ultra-high strength steel or one-piece die-cast aluminum alloy. It connects to the vehicle's longitudinal beams, bears the weight of the battery module, and disperses the impact force through a multi-cavity cross-section during a side collision, protecting the core area of ​​the battery. It is also bolted to the vehicle's longitudinal beams, enhancing the overall torsional rigidity of the battery pack. Figure 1 As shown, the battery tray crossbeam casting connects to both sides of the intermediate profile and to the vehicle body longitudinal beam. Located at the front end of the battery pack, the battery tray crossbeam is a key load-bearing structure of the battery tray frame. Its design needs to be compatible with component layout, reduce the internal space occupied by the battery pack, and adjust the material, shape, and connection process according to the vehicle's safety standards and functional requirements. Therefore, it has high precision requirements for the assembly dimensions of the components, as well as certain requirements for the flatness and perpendicularity of the parts, resulting in increasingly stringent performance requirements. Currently, without tooling, CNC machining cannot meet the dimensional accuracy requirements of the battery tray crossbeam, and it is inefficient and has poor dimensional repeatability.

[0004] Therefore, overcoming the technical problems of large machining allowances in existing new energy vehicle battery tray beam castings, which cannot meet their dimensional accuracy requirements, and are difficult to position and control deformation, has become a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of this utility model is to provide a CNC machining fixture for the crossbeam of a battery tray in new energy vehicles, which mainly solves the technical problems of existing new energy vehicle battery tray crossbeam castings having large machining allowances, failing to meet their dimensional accuracy requirements, and being difficult to position and control deformation.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a CNC machining fixture for a battery tray crossbeam of a new energy vehicle, the battery tray crossbeam including a left casting, a middle profile and a right casting, characterized in that: the CNC machining fixture includes a bridge plate mechanism, a left positioning mechanism for positioning the left casting, a right positioning mechanism for positioning the right casting, a left clamping mechanism for clamping and fixing the left casting, and a right clamping mechanism for clamping and fixing the right casting; the left positioning mechanism, the right positioning mechanism, the left clamping mechanism and the right clamping mechanism are all fixed on the bridge plate mechanism.

[0007] Furthermore, the left casting includes a left A pressure surface, a left B positioning hole, a left C positioning hole, and a left D pressure surface. The left A pressure surface and the left D pressure surface correspond to the two sides of the left casting, and the opening of the left B positioning hole and the opening of the left C positioning hole correspond to the left D pressure surface.

[0008] The right casting includes a right A pressure surface, a right B positioning hole, a right C positioning hole, and a right D pressure surface. The right A pressure surface and the right D pressure surface correspond to the two sides of the right casting, and the openings of the right B positioning hole and the right C positioning hole correspond to the right D pressure surface.

[0009] Furthermore, the bridge plate mechanism includes a bridge plate, on which are provided a left first guide block and a left second guide block for guiding and assisting in positioning the left casting. The axis where the left first guide block is located and the axis where the left second guide block is located are perpendicular to each other. Both the left first guide block and the left second guide block abut against the edge of the left D pressure surface.

[0010] The bridge plate is equipped with a right first guide block and a right second guide block for guiding and assisting in positioning the right casting. The axis of the right first guide block and the axis of the right second guide block are perpendicular to each other, and both the right first guide block and the right second guide block abut against the edge of the right D pressure surface.

[0011] Furthermore, the bridge deck is also equipped with left first support block, left second support block, left third support block and left fourth support block, as well as right first support block, right second support block, right third support block and right fourth support block;

[0012] The left positioning mechanism includes a left cylindrical positioning pin that corresponds to the left fourth clearance hole A position of the left fourth support block and is fixed on the bridge plate, and a left diamond-shaped positioning pin that corresponds to the left third clearance hole A position of the left third support block and is fixed on the bridge plate. The left cylindrical positioning pin corresponds to the left C positioning hole, and the left diamond-shaped positioning pin corresponds to the left B positioning hole.

[0013] The right positioning mechanism includes a right cylindrical positioning pin that corresponds to the right fourth clearance hole A position of the right fourth support block and is fixed on the bridge plate, and a right rhomboid positioning pin that corresponds to the right third clearance hole A position of the right third support block and is fixed on the bridge plate. The right cylindrical positioning pin corresponds to the right C positioning hole, and the right rhomboid positioning pin corresponds to the right B positioning hole.

[0014] Furthermore, the tops of the left cylindrical locating pin, the left rhomboid locating pin, the right cylindrical locating pin, and the right rhomboid locating pin are all provided with guide portions, which are rounded.

[0015] Furthermore, the left clamping mechanism includes a left first clamping device, a left third clamping device, and a left fourth clamping device for clamping the left A pressure surface of the left casting, and a left second clamping device for clamping the left D pressure surface of the left casting. The left first clamping device, the left second clamping device, the left third clamping device, and the left fourth clamping device are all fixed on the bridge plate.

[0016] The right clamping mechanism includes a right first clamping device, a right third clamping device, and a right fourth clamping device for clamping the right A pressure surface of the right casting, and a right second clamping device for clamping the right D pressure surface of the right casting. The right first clamping device, the right second clamping device, the right third clamping device, and the right fourth clamping device are all fixed on the bridge plate.

[0017] Furthermore, the left first clamping device, left second clamping device, left third clamping device, left fourth clamping device, right first clamping device, right second clamping device, right third clamping device and right fourth clamping device all have the same structure, all including a corner cylinder, a cylinder seat, a pressure arm and a pressure block. The cylinder seat is fixed on the bridge plate, the corner cylinder is fixed on the upper left of the cylinder, one end of the pressure arm is connected to the movable rod of the corner cylinder, and the other end of the pressure arm is connected to the pressure block.

[0018] Furthermore, the oil circuits of the corner cylinders of the left first clamping device, left second clamping device, left third clamping device, left fourth clamping device, right first clamping device, right second clamping device, right third clamping device and right fourth clamping device are all arranged in series inside the bridge plate for control.

[0019] Furthermore, the left first guide block, the left second guide block, the right first guide block, and the right second guide block are all fixed to the bridge plate with screws and pins;

[0020] The left first support block, left second support block, left third support block, left fourth support block, right first support block, right second support block, right third support block and right fourth support block are all fixed to the bridge plate by screws and pins.

[0021] Furthermore, the left fourth support block is also provided with a left fourth clearance hole B for machining the left first hole of the left casting, and the left third support block is also provided with a left third clearance hole B for machining the left second hole of the left casting.

[0022] The right fourth support block is also provided with a right fourth clearance hole B for machining the right first hole of the right casting, and the right third support block is also provided with a right third clearance hole B for machining the right second hole of the right casting.

[0023] Each of the bridge plate has a through hole corresponding to the left fourth clearance hole B, the left third clearance hole B, the right fourth clearance hole B, and the right third clearance hole B.

[0024] In view of the above technical features, the present invention has the following beneficial effects:

[0025] 1. This utility model discloses a CNC machining fixture for a battery tray crossbeam of a new energy vehicle. By setting a left positioning mechanism for positioning the left casting and a right positioning mechanism for positioning the right casting on the bridge plate, along with a left clamping mechanism for clamping and fixing the left casting and a right clamping mechanism for clamping and fixing the right casting, the fixture achieves clamping and fixing of the left and right castings of the battery tray crossbeam. This facilitates subsequent CNC machining. After CNC machining, the left and right castings of the battery tray crossbeam are precisely positioned, deformation is controlled, and dimensional accuracy is higher, ensuring interchangeability. Without this CNC machining fixture for a battery tray crossbeam of a new energy vehicle, even if the left and right castings are accurately fixed using existing methods, ensuring the precise relative positions of each part is impossible. Furthermore, castings often deform during machining, especially complex structures, sometimes to an unavoidable degree, affecting subsequent assembly and even causing product scrap.

[0026] 2. This utility model discloses a CNC machining fixture for a battery tray crossbeam in a new energy vehicle. The left and right clamping mechanisms utilize a rotary hydraulic cylinder design to automatically clamp and release the left and right castings of the battery tray crossbeam, improving CNC machining efficiency, reducing manufacturing costs, increasing labor productivity, reducing labor intensity, and ensuring safe production. The casting machining process generally includes: preparation (semi-finished battery tray crossbeam), assembly (alignment, positioning, clamping, etc.), CNC machining, cleaning (removing the workpiece from the fixture, removing residue, etc.), inspection, and final inspection. The workload of auxiliary processes before and after machining often exceeds that of the machining processes themselves. Therefore, the most effective measure to improve productivity is to reduce the time spent on auxiliary processes. In CNC machining production, the pure casting CNC machining time only accounts for 10% to 30% of the total product machining time; the remainder is spent on material preparation, assembly, and auxiliary work. If the CNC machining fixture for the crossbeam of a new energy vehicle battery tray according to this utility model is used, and the auxiliary time is reduced to 20 minutes, then the labor productivity can be increased by 40%, achieving one-time clamping, multi-face processing, and combining high precision and automation. Clearly, to shorten the production cycle and improve labor productivity, in addition to adopting automated CNC machining processes, it is also necessary to use tooling fixtures with high positioning accuracy and a high degree of automation (i.e., the CNC machining fixture for the crossbeam of a new energy vehicle battery tray according to this utility model).

[0027] 3. The present invention provides a CNC machining fixture for a crossbeam of a battery tray for a new energy vehicle, which is equipped with a left first guide block and a left second guide block, a right first guide block and a right second guide block, which can guide and assist in positioning the left and right castings, further improving the installation accuracy of the left and right castings and the stability during CNC machining, and helping to improve the dimensional accuracy after machining. Attached Figure Description

[0028] Figure 1 This is a schematic diagram (top view angle) of the structure of the crossbeam casting of the battery tray in new energy vehicles in the existing technology.

[0029] Figure 2 This is a schematic diagram of the structure of the left casting in specific embodiment 1.

[0030] Figure 3 This is a schematic diagram of the right casting in specific embodiment 1.

[0031] Figure 4 This is a schematic diagram of the CNC machining fixture used for the crossbeam of the battery tray in a new energy vehicle, as shown in Specific Embodiment 1. Figure 1 .

[0032] Figure 5 This is a schematic diagram of the CNC machining fixture used for the crossbeam of the battery tray in a new energy vehicle, as shown in Specific Embodiment 1. Figure 2 (Partial)

[0033] Figure 6 This is a schematic diagram of the structure of the rhomboid locating pin in specific embodiment 1 (taking the left rhomboid locating pin as an example).

[0034] Figure 7 This is a schematic diagram of the cylindrical locating pin in specific embodiment 1 (taking the left cylindrical locating pin as an example).

[0035] Figure 8 This is a schematic diagram of the clamping mechanism in specific embodiment 1 (taking the clamping device on the left as an example).

[0036] Figure 9 This is a schematic diagram illustrating the usage of the CNC machining fixture for the crossbeam of the new energy vehicle battery tray in Specific Embodiment 1. Figure 1 .

[0037] Figure 10 This is a schematic diagram illustrating the usage of the CNC machining fixture for the crossbeam of the new energy vehicle battery tray in Specific Embodiment 1. Figure 2 .

[0038] Figure 11 This is a schematic diagram illustrating the usage of the CNC machining fixture for the crossbeam of the new energy vehicle battery tray in Specific Embodiment 1. Figure 3 .

[0039] In the diagram: 1. Bridge plate;

[0040] 21. Left guide block; 22. Right guide block;

[0041] 31. Second guide block from the left; 32. Second guide block from the right;

[0042] 41. Left support block; 42. Right support block;

[0043] 51. Second support block from the left; 52. Second support block from the right;

[0044] 61. Left third support block; 611. Left third clearance hole A; 612. Left third clearance hole B; 62. Right third support block;

[0045] 71. Left fourth support block; 711. Left fourth clearance hole A; 712. Left fourth clearance hole B; 72. Right fourth support block;

[0046] 811. Left clamping device; 821. Right clamping device;

[0047] 812. Left second clamping device; 822. Right second clamping device;

[0048] 813. Left three-clamping device; 823. Right three-clamping device;

[0049] 814. Left four-clamping device; 824. Right four-clamping device;

[0050] 831. Cylinder base; 832. Angle cylinder; 833. Pressure arm; 834. Pressure block;

[0051] 91. Left diamond-shaped locating pin; 92. Right diamond-shaped locating pin; 93. Guide portion of the diamond-shaped locating pin;

[0052] 101. Left cylindrical locating pin; 102. Right cylindrical locating pin; 103. Guide part of the cylindrical locating pin;

[0053] 11. Battery tray crossbeam;

[0054] 111. Left casting;

[0055] 1111, Left A pressure surface; 1112, Left B positioning hole; 1113, Left C positioning hole; 1114, Left D pressure surface; 1115, Left first hole; 1116, Left second hole;

[0056] 112. Right casting;

[0057] 1121. Right A pressure surface; 1122. Right B positioning hole; 1123. Right C positioning hole; 1124. Right D pressure surface; 1125. Right first hole; 1126. Right second hole;

[0058] 113. Intermediate profiles. Detailed Implementation

[0059] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0060] See Figures 1 to 11 In specific embodiment 1, this embodiment 1 provides a CNC machining fixture for a battery tray beam of a new energy vehicle. The battery tray beam 11 includes a left casting 111, a middle profile 113 and a right casting 112. The CNC machining fixture includes a bridge plate mechanism, a left positioning mechanism for positioning the left casting 111, a right positioning mechanism for positioning the right casting 112, a left clamping mechanism for clamping and fixing the left casting 111, and a right clamping mechanism for clamping and fixing the right casting 112. The left positioning mechanism, the right positioning mechanism, the left clamping mechanism and the right clamping mechanism are all fixed on the bridge plate mechanism.

[0061] The left casting 111 includes a left A pressure surface 1111, a left B positioning hole 1112, a left C positioning hole 1113, and a left D pressure surface 1114. The left A pressure surface 1111 and the left D pressure surface 1114 correspond to the two sides of the left casting 111. The opening of the left B positioning hole 1112 and the opening of the left C positioning hole 1113 correspond to the left D pressure surface 1114.

[0062] The right casting 112 includes a right A pressure surface 1121, a right B positioning hole 1122, a right C positioning hole 1123, and a right D pressure surface 1124. The right A pressure surface 1121 and the right D pressure surface 1124 correspond to the two sides of the right casting 112. The opening of the right B positioning hole 1122 and the opening of the right C positioning hole 1123 correspond to the right D pressure surface 1124.

[0063] The bridge plate mechanism includes a bridge plate 1. The bridge plate 1 is provided with a left first guide block 21 and a left second guide block 31 for guiding and assisting in positioning the left casting 111. The axis of the left first guide block 21 and the axis of the left second guide block 31 are perpendicular to each other. The left first guide block 21 and the left second guide block 31 abut against the edge of the left D pressure surface 1114. Before the left cylindrical locating pin 101 is inserted into the left C locating hole 1113 and the left rhomboid locating pin 91 is inserted into the left B locating hole 1112, the left first guide block 21 and the left second guide block 31 guide the movement of the left casting 111. After the left cylindrical locating pin 101 is inserted into the left C locating hole 1113 and the left rhomboid locating pin 91 is inserted into the left B locating hole 1112, the left first guide block 21 and the left second guide block 31 provide auxiliary limiting for the left casting 111 in the X and Y axis directions. For example, during the subsequent machining of the left casting 111, due to the large machining allowance, the left first guide block 21 and the left second guide block 31 can also prevent the left casting 111 from vibrating and help the left casting 111 to enhance rigidity and disperse stress.

[0064] The bridge plate 1 is provided with a right first guide block 22 and a right second guide block 32 for guiding and assisting in positioning the right casting 112. The axis of the right first guide block 22 and the axis of the right second guide block 32 are perpendicular to each other. Both the right first guide block 22 and the right second guide block 32 abut against the edge of the right D pressure surface 1124. Before the right cylindrical locating pin 102 is inserted into the right C locating hole 1123 and the right rhomboid locating pin 92 is inserted into the right B locating hole 1122, the right first guide block 22 and the right second guide block 32 guide the movement of the right casting 112. After the right cylindrical locating pin 102 is inserted into the right C locating hole 1123 and the right rhomboid locating pin 92 is inserted into the right B locating hole 1122, the right first guide block 22 and the right second guide block 32 provide auxiliary limiting for the right casting 112 in the X and Y axis directions. For example, during the subsequent machining of the right casting 112, due to the large machining allowance, the right first guide block 22 and the right second guide block 32 can also prevent the right casting 112 from vibrating and help the right casting 112 to enhance rigidity and disperse stress.

[0065] Left guide block 21, left guide block 31, right guide block 22 and right guide block 32 are all fixed to bridge plate 1 by screws and pins. Left guide block 21, left guide block 31, right guide block 22 and right guide block 32 are L-shaped blocks.

[0066] The bridge plate 1 is also provided with a left first support block 41, a left second support block 51, a left third support block 61 and a left fourth support block 71, as well as a right first support block 42, a right second support block 52, a right third support block 62 and a right fourth support block 72. The left first support block 41, the left second support block 51, the left third support block 61, the left fourth support block 71, the right first support block 42, the right second support block 52, the right third support block 62 and the right fourth support block 72 are all fixed to the bridge plate 1 by screws and pins, and are used to support the bottom large surface of the left casting 111 (i.e. the bottom surface of the left D pressure surface 1114) and the bottom large surface of the right casting 112 (i.e. the bottom surface of the right D pressure surface 1124), and cooperate with the corresponding clamping device to realize the clamping operation of the left casting 111 and / or the right casting 112.

[0067] The left positioning mechanism includes a left cylindrical positioning pin 101 fixed to the bridge plate 1 at the position of the left fourth clearance hole A711 corresponding to the left fourth support block 71, and a left rhomboid positioning pin 91 fixed to the bridge plate 1 at the position of the left third clearance hole A611 corresponding to the left third support block 61. The left cylindrical positioning pin 101 corresponds to the left C positioning hole 1113, and the left rhomboid positioning pin 91 corresponds to the left B positioning hole 1112. The cylindrical positioning pin, the rhomboid positioning pin, the two guide blocks, and the corresponding clamping mechanism realize six-point positioning of the corresponding casting, more accurately clamp and fix the corresponding casting, facilitate subsequent CNC machining operations, and improve the accuracy of CNC machining.

[0068] The right positioning mechanism includes a right cylindrical positioning pin 102, which corresponds to the right fourth clearance hole A721 of the right fourth support block 72 and is fixed on the bridge plate 1, and a right rhomboid positioning pin 92, which corresponds to the right third clearance hole A621 of the right third support block 62 and is fixed on the bridge plate 1. The right cylindrical positioning pin 102 corresponds to the right C positioning hole 1123, and the right rhomboid positioning pin 92 corresponds to the right B positioning hole 1122.

[0069] The tops of the left cylindrical locating pin 101, the left rhomboid locating pin 91, the right cylindrical locating pin 102, and the right rhomboid locating pin 92 are all provided with guide portions (such as the guide portion 93 of the rhomboid locating pin and the guide portion 103 of the cylindrical locating pin). The guide portions are rounded to facilitate the insertion of the corresponding locating pins into the corresponding locating holes of the casting.

[0070] The left clamping mechanism includes a left first clamping device 811, a left third clamping device 813, and a left fourth clamping device 814 for clamping the left A pressure surface 1111 of the left casting 111, and a left second clamping device 812 for clamping the left D pressure surface 1114 of the left casting 111. The left first clamping device 811, the left second clamping device 812, the left third clamping device 813, and the left fourth clamping device 814 are all fixed on the bridge plate 1.

[0071] The right clamping mechanism includes a right first clamping device 821, a right third clamping device 823, and a right fourth clamping device 824 for clamping the right A pressure surface 1121 of the right casting 112, and a right second clamping device 822 for clamping the right D pressure surface 1124 of the right casting 112. The right first clamping device 821, the right second clamping device 822, the right third clamping device 823, and the right fourth clamping device 824 are all fixed on the bridge plate 1.

[0072] The left clamping devices 811, 812, 813, 814, 822, 823, and 824 are all structurally identical, each including a corner cylinder 832, a cylinder seat 831, a pressure arm 833, and a pressure block 834. The cylinder seat 831 is fixed to the bridge plate 1, the corner cylinder 832 is fixed to the upper left of the cylinder, one end of the pressure arm 833 is connected to the movable rod of the corner cylinder 832, and the other end of the pressure arm 833 is connected to the pressure block 834. The corner cylinder 832 controls the lifting and rotation of the pressure arm 833, and the pressure block 834 is used to clamp and release the left casting 111 or the right casting 112, which also facilitates the loading and unloading of the left casting 111 or the right casting 112.

[0073] The oil circuits of the corner cylinders 832 of the left clamping device 811, left second clamping device 812, left third clamping device 813, left fourth clamping device 814, right first clamping device, right second clamping device 822, right third clamping device 823 and right fourth clamping device 824 are all arranged in series inside the bridge plate 1 for control, so as to realize the synchronous clamping or synchronous release of the corresponding left casting 111 and right casting 112 by the eight clamping devices, thereby improving the processing efficiency.

[0074] The left fourth support block 71 is also provided with a left fourth clearance hole B712 for machining the left first hole 1115 of the left casting, and the left third support block 61 is also provided with a left third clearance hole B612 for machining the left second hole 1116 of the left casting.

[0075] The right fourth support block 72 is also provided with a right fourth clearance hole B722 for machining the right first hole 1125 of the right casting, and the right third support block 62 is also provided with a right third clearance hole B622 for machining the right second hole 1126 of the right casting.

[0076] Bridge plate 1 has a through hole (not shown in the attached figure) at each of the left fourth clearance hole B712, left third clearance hole B612, right fourth clearance hole B722 and right third clearance hole B622. This allows the left and right castings to complete the through hole machining in one operation using CNC machining fixtures, avoiding repeated clamping and clamping errors.

[0077] In this embodiment 1, a CNC machining fixture for a battery tray beam of a new energy vehicle is used. The left casting 111 of the battery tray beam 11 is placed on the left first guide block 21, the left second guide block 31, the left first support block 41, the left second support block 51, the left third support block 61, and the left fourth support block 71. The left casting 111 is positioned by the left cylindrical positioning pin 101 and the left rhomboid positioning pin 91 of the left positioning mechanism, and then the left casting 111 is clamped by the left clamping mechanism to achieve… The left casting 111 is positioned and clamped. Simultaneously, the right casting 112 of the battery tray beam 11 is placed on the right first guide block 22, right second guide block 32, right first support block 42, right second support block 52, right third support block 62, and right fourth support block 72. The right casting 112 is positioned by the right cylindrical positioning pin 102 and right rhomboid positioning pin 92 of the right positioning mechanism, and then clamped by the right clamping mechanism, thus realizing the positioning and clamping function of the right casting 112. A CNC machining fixture for a battery tray beam of a new energy vehicle accurately positions the left casting 111 and the right casting 112, controls their deformation, meets the accuracy requirements of CNC machining, improves the accuracy of CNC machining, ensures their interchangeability, reduces manufacturing costs, increases labor productivity, reduces labor intensity, and ensures safe production.

[0078] The left casting 111 and the right casting 112 have the same reference, which reduces repeated positioning, optimizes the process, and allows the product processing features to be processed in one tooling.

[0079] The CNC machining fixture for the battery tray beam of a new energy vehicle, as described in Embodiment 1, not only ensures the correct relative positions of the parts during assembly and positioning of the left casting 111 and right casting 112 of the battery tray beam 11 with the intermediate profile 113 and other assemblies, but also prevents or reduces machining deformation of the workpieces (i.e., the left casting 111 and right casting 112 of the battery tray beam 11). Especially in mass production, the shared CNC machining fixture for the battery tray beam of a new energy vehicle, as described in Embodiment 1, can consistently improve machining efficiency and quality, reduce dimensional deviations, and ensure the interchangeability of the products (i.e., the left casting 111 and right casting 112 of the battery tray beam 11).

[0080] By employing the CNC machining fixture for the crossbeam of a new energy vehicle battery tray as described in Embodiment 1, the time spent on auxiliary processes (such as alignment, positioning, and clamping processes between CNC machining steps) can be reduced, thus significantly improving labor productivity. This achieves multi-faceted machining with a single clamping operation, combining high precision with automation (i.e., automatic clamping and releasing of the clamping device). This shortens the production cycle and increases labor productivity.

[0081] The CNC machining fixture for the crossbeam of a new energy vehicle battery tray in Embodiment 1 uses locating pins (such as left cylindrical locating pin 101, left rhomboid locating pin 91, right cylindrical locating pin 102 and right rhomboid locating pin 92) to achieve rapid positioning of workpieces (such as left casting 111 and right casting 112), which is convenient for clamping and saves time and effort. The use of the corner cylinder 832 reduces the heavy physical labor during casting assembly and clamping, greatly improving working conditions. The reduction of manual clamping process reduces the occurrence of dangerous accidents and ensures safe production.

[0082] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0083] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0084] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A CNC machining fixture for a battery tray crossbeam of a new energy vehicle, the battery tray crossbeam (11) comprising a left casting (111), a middle profile (113) and a right casting (112), characterized in that: The CNC machining fixture includes a bridge plate mechanism, a left positioning mechanism for positioning the left casting (111), a right positioning mechanism for positioning the right casting (112), a left clamping mechanism for clamping and fixing the left casting (111), and a right clamping mechanism for clamping and fixing the right casting (112); the left positioning mechanism, the right positioning mechanism, the left clamping mechanism and the right clamping mechanism are all fixed on the bridge plate mechanism.

2. The CNC machining fixture for a crossbeam of a battery tray in a new energy vehicle according to claim 1, characterized in that: The left casting (111) includes a left A pressure surface (1111), a left B positioning hole (1112), a left C positioning hole (1113), and a left D pressure surface (1114). The left A pressure surface (1111) and the left D pressure surface (1114) correspond to the two sides of the left casting (111), and the opening of the left B positioning hole (1112) and the opening of the left C positioning hole (1113) correspond to the left D pressure surface (1114). The right casting (112) includes a right A pressure surface (1121), a right B positioning hole (1122), a right C positioning hole (1123), and a right D pressure surface (1124). The right A pressure surface (1121) and the right D pressure surface (1124) correspond to the two sides of the right casting (112), and the opening of the right B positioning hole (1122) and the opening of the right C positioning hole (1123) correspond to the right D pressure surface (1124).

3. The CNC machining fixture for a crossbeam of a new energy vehicle battery tray according to claim 2, characterized in that: The bridge plate mechanism includes a bridge plate (1). The bridge plate (1) is provided with a left first guide block (21) and a left second guide block (31) for guiding and assisting in positioning the left casting (111). The axis of the left first guide block (21) and the axis of the left second guide block (31) are perpendicular to each other. The left first guide block (21) and the left second guide block (31) both abut against the edge of the left D pressure surface (1114). The bridge plate (1) is provided with a right first guide block (22) and a right second guide block (32) for guiding and assisting in positioning the right casting (112). The axis of the right first guide block (22) and the axis of the right second guide block (32) are perpendicular to each other. The right first guide block (22) and the right second guide block (32) abut against the edge of the right D pressure surface (1124).

4. The CNC machining fixture for a crossbeam of a new energy vehicle battery tray according to claim 3, characterized in that: The bridge plate (1) is also provided with a left first support block (41), a left second support block (51), a left third support block (61) and a left fourth support block (71), as well as a right first support block (42), a right second support block (52), a right third support block (62) and a right fourth support block (72); The left positioning mechanism includes a left cylindrical positioning pin (101) that corresponds to the position of the left fourth clearance hole A (711) of the left fourth support block (71) and is fixed on the bridge plate (1), and a left diamond positioning pin (91) that corresponds to the position of the left third clearance hole A (611) of the left third support block (61) and is fixed on the bridge plate (1). The left cylindrical positioning pin (101) corresponds to the left C positioning hole (1113), and the left diamond positioning pin (91) corresponds to the left B positioning hole (1112). The right positioning mechanism includes a right cylindrical positioning pin (102) that corresponds to the right fourth clearance hole A (721) of the right fourth support block (72) and is fixed on the bridge plate (1), and a right rhomboid positioning pin (92) that corresponds to the right third clearance hole A (621) of the right third support block (62) and is fixed on the bridge plate (1). The right cylindrical positioning pin (102) corresponds to the right C positioning hole (1123), and the right rhomboid positioning pin (92) corresponds to the right B positioning hole (1122).

5. The CNC machining fixture for a crossbeam of a battery tray in a new energy vehicle according to claim 4, characterized in that: The tops of the left cylindrical locating pin (101), the left rhomboid locating pin (91), the right cylindrical locating pin (102), and the right rhomboid locating pin (92) are all provided with guide portions, which are rounded.

6. The CNC machining fixture for a crossbeam of a battery tray in a new energy vehicle according to claim 5, characterized in that: The left clamping mechanism includes a left first clamping device (811), a left third clamping device (813), and a left fourth clamping device (814) for clamping the left A pressure surface (1111) of the left casting (111), and a left second clamping device (812) for clamping the left D pressure surface (1114) of the left casting (111). The left first clamping device (811), the left second clamping device (812), the left third clamping device (813), and the left fourth clamping device (814) are all fixed on the bridge plate (1). The right clamping mechanism includes a right first clamping device (821), a right third clamping device (823), and a right fourth clamping device (824) for clamping the right A pressure surface (1121) of the right casting (112), and a right second clamping device (822) for clamping the right D pressure surface (1124) of the right casting (112). The right first clamping device (821), the right second clamping device (822), the right third clamping device (823), and the right fourth clamping device (824) are all fixed on the bridge plate (1).

7. The CNC machining fixture for a crossbeam of a battery tray in a new energy vehicle according to claim 6, characterized in that: The left clamping device (811), left second clamping device (812), left third clamping device (813), left fourth clamping device (814), right first clamping device (821), right second clamping device (822), right third clamping device (823) and right fourth clamping device (824) have the same structure. They all include a corner cylinder (832), a cylinder seat (831), a pressure arm (833) and a pressure block (834). The cylinder seat (831) is fixed on the bridge plate (1), the corner cylinder (832) is fixed on the upper left of the cylinder, one end of the pressure arm (833) is connected to the movable rod of the corner cylinder (832), and the other end of the pressure arm (833) is connected to the pressure block (834).

8. The CNC machining fixture for a crossbeam of a new energy vehicle battery tray according to claim 7, characterized in that: The oil circuits of the corner cylinders (832) of the left clamping device (811), left second clamping device (812), left third clamping device (813), left fourth clamping device (814), right first clamping device (821), right second clamping device (822), right third clamping device (823) and right fourth clamping device (824) are all arranged in series inside the bridge plate (1) for control.

9. The CNC machining fixture for a crossbeam of a battery tray in a new energy vehicle according to claim 8, characterized in that: The left guide block (21), the left second guide block (31), the right first guide block (22) and the right second guide block (32) are all fixed to the bridge plate (1) by screws and pins; Left support block (41), left support block (51), left support block (61), left support block (71), right support block (42), right support block (52), right support block (62) and right support block (72) are all fixed to the bridge plate (1) by screws and pins.

10. The CNC machining fixture for a crossbeam of a battery tray in a new energy vehicle according to claim 9, characterized in that: The left fourth support block (71) is also provided with a left fourth clearance hole B (712) for machining the left first hole (1115) of the left casting, and the left third support block (61) is also provided with a left third clearance hole B (612) for machining the left second hole (1116) of the left casting. The right fourth support block (72) is also provided with a right fourth clearance hole B (722) for machining the right first hole (1125) of the right casting, and the right third support block (62) is also provided with a right third clearance hole B (622) for machining the right second hole (1126) of the right casting. The bridge plate (1) has a through hole at each of the four left clearance holes B (712), the three left clearance holes B (612), the four right clearance holes B (722), and the three right clearance holes B (622).

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