An automatic production line tool clamp for automobile connecting rod

Abstract

This invention discloses a tooling fixture for an automated production line of automotive connecting rods, belonging to the field of tooling fixture technology. It includes a gripper installed at the end effector of a robot. The gripper includes a top plate connected to the robot's end effector. Both sides of the bottom of the top plate are equipped with large-end inner support components via multiple mounting seats, and small-end inner support components are also mounted on these mounting seats. Driven by the robot, the large-end and small-end inner support components simultaneously clamp multiple connecting rods. Through the gripper and workpiece clamping unit, simultaneous and precise feeding of multiple workpieces is achieved, reducing scrap rate and improving production efficiency. By integrating the large-end and small-end inner support components into the gripper, and in conjunction with a pressure plate, the double inner hole centering and end face flattening of the connecting rod can be completed during the gripping stage, preventing workpiece deflection and movement during transport. No secondary correction is required when feeding to the workpiece clamping unit, effectively improving feeding positioning accuracy and reducing scrap rate caused by clamping deviation.

Description

Technical Field

[0001] This invention relates to the field of tooling and fixture technology, and in particular to a tooling and fixture for an automated production line for automotive connecting rods. Background Technology

[0002] Connecting rods are core transmission components of automotive engines, and their machining accuracy directly affects engine performance and lifespan. With the automation upgrade of the automotive manufacturing industry, connecting rod machining processes have gradually adopted automated production lines with robotic loading. Robots, in conjunction with machine tool fixtures, automatically load, clamp, and process connecting rods to improve production efficiency and reduce labor costs.

[0003] Existing linkage machining fixtures mainly consist of two parts: a robot gripper and a machine tool end clamping fixture. The robot gripper mostly adopts a single internal support or external clamping structure, which only has basic gripping and transfer functions. It cannot complete the workpiece posture calibration and pre-positioning during the gripping stage. During the linkage transfer process, it is prone to deflection and movement. When the material is loaded into the fixture, the alignment accuracy is insufficient, which can easily lead to clamping deviation and thus increase the machining scrap rate. Moreover, most grippers are single-station clamping structures, which cannot realize the synchronous gripping and loading of multiple linkages. It is difficult to match the multi-station machining cycle, which restricts the production efficiency of automated production lines. In terms of machine tool end clamping, traditional connecting rod clamping generally adopts a two-point clamping scheme of "large end positioning and clamping + small end simple support". The clamping force is concentrated on both ends of the connecting rod. For slender connecting rods, the concentrated stress can easily cause the rod body to bend and deform, which directly affects the form and position tolerances and machining accuracy of the connecting rod. At the same time, the small end of the existing clamping is mostly only set with bottom support and lacks lateral constraint structure. During milling and boring, the connecting rod is subjected to lateral cutting force, which can easily generate micro displacement and cutting vibration, further reducing the stability of the machining dimensions and the surface quality of the workpiece. Summary of the Invention

[0004] The purpose of this invention is to address the problem that traditional connecting rod fixtures generally use a two-point clamping scheme, where the clamping force is concentrated at both ends of the connecting rod. For slender connecting rods, this concentrated stress can easily lead to bending deformation of the rod body, directly affecting the form and position tolerances and machining accuracy of the connecting rod. Therefore, this invention proposes a tooling fixture for an automated production line for automotive connecting rods.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An automated production line fixture for automotive connecting rods includes a gripper mounted on the end effector of a robot. The gripper includes a top plate connected to the end effector of the robot. Both sides of the bottom of the top plate are equipped with large-end inner support components via multiple mounting seats, and small-end inner support components are also mounted on the multiple mounting seats. The large-end inner support components and small-end inner support components achieve simultaneous clamping of multiple connecting rods under the drive of the robot. It also includes a workpiece clamping unit installed on a machine tool. The workpiece clamping unit includes a clamping body installed on the machine tool. Multiple connecting rods clamped by the gripper are clamped at multiple points through a three-point positioning component assembled on the clamping body, so that the connecting rods do not deform due to concentrated force. The clamping body is an integrated structure, and an air blowing channel is provided inside the clamping body. During the processing, the connecting rod achieves directional cleaning of the generated iron filings through the air blowing pipe assembled in the air blowing channel.

[0006] As a further description of the above technical solution: The three-point positioning assembly includes a rotating cylinder fixed to the clamp body, and a double pressure arm is mounted on the top of the rotating cylinder. A first guide seat is fixed on the clamp body between the two rotating cylinders, and a first slide rod is inserted into the first guide seat. A diamond pin is mounted on the top of the first slide rod.

[0007] As a further description of the above technical solution: A first hydraulic lifting cylinder is mounted on one side of the inner top wall of the clamping body via a first cylinder seat, and one end of the first hydraulic lifting cylinder is connected to the bottom end of the first slide rod. A large end support with its bottom end connected to the clamping body is sleeved on the outer surface of the first guide seat. A chip removal plate is sleeved on the bottom end of the large end support, and an anti-misalignment rod is installed in the middle of one side of the upper surface of the large end support.

[0008] As a further description of the above technical solution: A float support is mounted on one side of the upper surface of the clamping body, a first float cylinder is mounted on the inner side of the float support, and a first float head is mounted on one end of the first float cylinder.

[0009] As a further description of the above technical solution: A second guide seat is fixed on the side of the clamp body near the first floating support cylinder, and a second slide rod is inserted into the second guide seat. The top end of the second slide rod is equipped with a round pin corresponding to the small end of the connecting rod. On the other side of the inner top wall of the clamp body, a second hydraulic lifting cylinder is installed by installing a second oil cylinder seat, and one end of the second hydraulic lifting cylinder is connected to the bottom end of the second slide rod.

[0010] As a further description of the above technical solution: A material feeding support for supporting the connecting rod is fixed on one side of the upper surface of the second guide seat. A second floating support cylinder is assembled on one side of the material feeding support, and a second floating support head is assembled on one end of the second floating support cylinder.

[0011] As a further description of the above technical solution: The large-end inner support assembly includes a first finger cylinder mounted on the bottom of the mounting base. A large-end inner support finger is mounted on the first finger cylinder via a guide rail. An mounting ring is mounted on the outer wall of the first finger cylinder. A dual-axis cylinder is mounted on one side of the upper surface of the mounting ring, and a pressure plate is mounted on one end of the piston rod of the dual-axis cylinder.

[0012] As a further description of the above technical solution: The small-end inner support assembly includes a second finger cylinder mounted on the other side of the bottom of the mounting base, and a small-end inner support finger is mounted on the second finger cylinder via a guide rail.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: By setting up grippers and workpiece clamping units, multiple workpieces can be fed synchronously and accurately, reducing scrap rate and improving production efficiency. By integrating large-end inner support components and small-end inner support components into the grippers, and working with the pressure plate, the centering of the connecting rod double inner hole and the flattening of the end face can be completed during the gripping stage, avoiding workpiece deflection and movement during the transfer process. No secondary correction is required when the workpiece is fed to the workpiece clamping unit, which effectively improves the feeding and positioning accuracy and reduces the scrap rate caused by clamping deviation. The clamping logic of "large end main positioning + small end bidirectional auxiliary constraint" is adopted by the three-point positioning component: the diamond pin and the large end support form the large end positioning and main support reference, and the second floating head lifts the small end of the connecting rod from the bottom surface to form a multi-point bottom support system; when the double pressure arm presses down, the bottom floating support provides a reverse lifting force, disperses the concentrated stress of the traditional two-end clamping, effectively suppresses the bending deformation of the slender rod body, and improves the machining shape and position accuracy. At the same time, the first floating head floats from the side and abuts against the outer wall of the small end of the connecting rod to offset the lateral cutting force during the machining process, suppress the workpiece micro displacement and cutting vibration, and improve dimensional stability and surface machining quality. Furthermore, the clamping body adopts an integrated structure with no gaps between the parts, which reduces dead corners where iron filings can be hidden. With the built-in air blowing pipe in the clamping body, iron filings on the positioning surface and processing area can be blown away in a directional manner without the need for external pipelines, thus avoiding interference with the robot's loading and unloading operations. With the inclined chip removal plate guiding the iron filings out in a directional manner, there is no need for manual shutdown to clean the iron filings. It can be adapted to long-term unattended automated continuous production, while avoiding the decrease in clamping accuracy caused by iron filings pressing on the clamping body, thus ensuring the stability of production yield. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall system provided according to an embodiment of the present invention is shown; Figure 2 A cross-sectional schematic diagram of a workpiece clamping unit provided according to an embodiment of the present invention is shown; Figure 3 A perspective view of a workpiece clamping unit provided according to an embodiment of the present invention is shown; Figure 4 A side view schematic diagram of a workpiece clamping unit provided according to an embodiment of the present invention is shown; Figure 5 A schematic diagram showing the installation position of the second hydraulic lifting cylinder provided according to an embodiment of the present invention is shown; Figure 6 A schematic diagram showing the installation position of the first hydraulic lifting cylinder according to an embodiment of the present invention is provided; Figure 7 A top view schematic diagram of a workpiece clamping unit provided according to an embodiment of the present invention is shown; Figure 8 A schematic diagram of a rotary cylinder provided according to an embodiment of the present invention is shown; Figure 9 A schematic diagram of the gripper provided according to an embodiment of the present invention is shown.

[0015] Legend: 10. Grab; 11. Top plate; 12. Mounting base; 13. Large end inner support assembly; 131. First finger cylinder; 132. Large end inner support finger; 133. Mounting ring; 134. Dual-axis cylinder; 135. Press plate; 14. Small end inner support assembly; 141. Second finger cylinder; 142. Small end inner support finger; 20. Workpiece clamping unit; 21. Clamping body; 22. Three-point positioning assembly; 221. Rotary cylinder; 222. Double pressure arm; 223. First guide seat; 224. First slide rod; 225. Diamond pin; 226. First hydraulic lifting cylinder; 227. Large end support; 228. Chip removal plate; 229. Floating support; 2210. First floating support cylinder; 2211. First floating support head; 2212. Second slide rod; 2213. Second hydraulic lifting cylinder; 2214. Unloading support; 2215. Second floating support cylinder; 2216. Second floating support head; 2217. Anti-misalignment rod; 2218. Second guide seat; 23. Air blowing pipe. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0017] like Figures 1-9 As shown, the present invention provides: An automated production line fixture for automotive connecting rods includes a gripper 10 (robot not shown) mounted on the end of a robot. The gripper 10 includes a top plate 11 connected to the end of the robot. Both sides of the bottom of the top plate 11 are equipped with large-end inner support components 13 via multiple mounting seats 12. Small-end inner support components 14 are also mounted on the multiple mounting seats 12. The large-end inner support components 13 and the small-end inner support components 14 can simultaneously clamp multiple connecting rods under the drive of the robot. The large-end inner support assembly 13 includes a first finger cylinder 131 mounted on the bottom of the mounting base 12. A large-end inner support finger 132 is mounted on the first finger cylinder 131 via a guide rail. An mounting ring 133 is mounted on the outer wall of the first finger cylinder 131. A dual-axis cylinder 134 is mounted on one side of the upper surface of the mounting ring 133, and a pressure plate 135 is mounted on one end of the piston rod of the dual-axis cylinder 134.

[0018] The small end inner support assembly 14 includes a second finger cylinder 141 mounted on the other side of the bottom of the mounting base 12, and a small end inner support finger 142 is mounted on the second finger cylinder 141 via a guide rail.

[0019] Specifically, during actual gripping, the first finger cylinder 131 drives the large-end inner support finger 132 to expand outward and extend into the large-end hole of the connecting rod to achieve inner hole centering. At the same time, the dual-axis cylinder 134 drives the pressure plate 135 to press the upper end face of the connecting rod vertically downward, restricting the axial movement of the connecting rod, ensuring the flatness of the workpiece, and eliminating end face warping. The second finger cylinder 141 drives the small-end inner support finger 142 to extend into the small-end hole of the connecting rod to synchronously limit the small end. The large-end inner support component 13 works in sync with the small-end inner support component 14. With double-hole positioning and end face flattening, the robot can grip multiple connecting rods simultaneously in a single action. The pre-positioning is completed during the gripping stage, and no secondary correction is required when transferring the workpiece to the lower workpiece clamping unit 20, which greatly reduces the scrap rate during loading.

[0020] like Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, it also includes a workpiece clamping unit 20 installed on the machine tool. The workpiece clamping unit 20 includes a clamping body 21 installed on the machine tool. Multiple connecting rods clamped by the gripper 10 are clamped at multiple points through a three-point positioning component 22 assembled on the clamping body 21, so that the connecting rods are not deformed due to concentrated force. The fixture body 21 is an integrated structure that provides a mounting base for all positioning and clamping components, structurally reducing dead angles for iron filings to hide. At the same time, it ensures that the installation benchmark of all stations is uniform and the positioning accuracy is consistent. The fixture body 21 is equipped with an air blowing channel. During the processing, the connecting rod is connected to the air blowing pipe 23 in the air blowing channel to achieve directional cleaning of the generated iron filings. Specifically, the air outlet of the air blowing pipe 23 is aligned with the positioning surface and the processing area, which can directionally spray compressed air to blow away the iron filings generated by cutting in real time, avoiding the accumulation of iron filings that affect the positioning accuracy and processing quality. Water can also be sent into the air blowing channel to clean the surface of the fixture body 21.

[0021] The three-point positioning assembly 22 includes a rotary cylinder 221 fixed on the clamping body 21, and a double pressure arm 222 is mounted on the top of the rotary cylinder 221. A first guide seat 223 is fixed on the clamping body 21 between the two rotary cylinders 221, and a first slide rod 224 is inserted into the first guide seat 223. A diamond pin 225 is mounted on the top of the first slide rod 224.

[0022] A first hydraulic lifting cylinder 226 is mounted on one side of the inner top wall of the clamping body 21 via a first cylinder seat. One end of the first hydraulic lifting cylinder 226 is connected to the bottom end of the first slide rod 224. A large end support 227 with its bottom end connected to the clamping body 21 is sleeved on the outer surface of the first guide seat 223. A chip removal plate 228 is sleeved on the bottom end of the large end support 227. An anti-misalignment rod 2217 is installed in the middle of one side of the upper surface of the large end support 227. The anti-misalignment rod 2217 identifies the placement direction and orientation of the connecting rod through contact detection. When the connecting rod is misplaced, a shutdown alarm is triggered to prevent the connecting rod from being scrapped and the equipment from being damaged due to misplacement. Specifically, the chip removal plate 228 receives the iron chips falling from the positioning surface and is inclined to one side to guide the iron chips to be discharged to one side of the fixture, thus preventing the iron chips from accumulating at the root of the support.

[0023] like Figure 3 , Figure 4 , Figure 5 and Figure 7As shown, a float support 229 is mounted on one side of the upper surface of the clamping body 21. A first float cylinder 2210 is installed inside the float support 229, and a first float head 2211 is mounted on one end of the first float cylinder 2210. A second guide seat 2218 is fixed on the side of the clamping body 21 near the first float cylinder 2210, and a second slide rod 2212 is inserted into the second guide seat 2218. The top end of the second slide rod 2212 is equipped with a circle corresponding to the small end of the connecting rod. On the other side of the inner top wall of the pin clamp 21, a second hydraulic lifting cylinder 2213 is mounted via a second cylinder seat. One end of the second hydraulic lifting cylinder 2213 is connected to the bottom end of the second slide rod 2212. A material feeding support 2214 for supporting the connecting rod is fixed on one side of the upper surface of the second guide seat 2218. A second floating support cylinder 2215 is mounted on one side of the material feeding support 2214, and a second floating support head 2216 is mounted on one end of the second floating support cylinder 2215.

[0024] It should be noted that the oil circuits of all rotating cylinders 221, the oil circuit of the first hydraulic lifting cylinder 226, and the oil circuit of the first floating support cylinder 2210 are connected together, and the oil inlet is located on the side of the clamp body 21. Specifically, when the gripper 10 places multiple connecting rods on the clamping body 21 simultaneously, the large end of the connecting rod is on the large end support 227. The large end support 227 serves as the main support surface of the large end, supporting the lower end face of the large end of the connecting rod, providing stable axial support, and dispersing the clamping stress. The small end of the connecting rod is on the round pin. At this time, the rotating cylinder 221 drives the double pressure arm 222 to rotate and press down from the vertical state to the horizontal state. The double pressure arm 222 simultaneously presses the two sides of the upper end face of the large end of the connecting rod, and the clamping force is evenly distributed to avoid workpiece skewing caused by unilateral clamping. At the same time, the first hydraulic lifting cylinder 226 drives the first slide rod 224 to move the diamond pin 225 upward into the large end of the connecting rod. During the process, the first guide seat 223 provides linear guidance for the first slide rod 224 to ensure the straightness of the lifting action and avoid the diamond pin 225 from skewing and affecting the positioning accuracy. Moreover, the diamond structure of the diamond pin 225 can compensate for the hole spacing tolerance, realize the precise radial positioning of the large end, and limit the translation and rotation in the plane of the connecting rod. At the same time, the first floating support cylinder 2210 provides a floating clamping force, driving the first floating support head 2211 to adaptively conform to the outer wall of the small end of the connecting rod, providing lateral auxiliary limiting and offsetting the lateral cutting force during the machining process; at the same time, the second hydraulic lifting cylinder 2213 drives the second slide rod 2212 to move the round pin upward, and the second guide seat 2218 provides guidance for the second slide rod 2212 to ensure the straightness and positioning accuracy of the round pin's lifting and lowering; the second floating support cylinder 2215 drives the second floating support head 2216 to move upward, pressing against the bottom surface of the small end of the connecting rod, cooperating with the first floating support head 2211 to form a two-way auxiliary constraint of "lateral limiting + bottom surface lifting" in the small end area, further dispersing the clamping stress and enhancing the clamping stability and anti-deformation effect; When used together, the diamond pin 225 and the large end support 227 form the positioning and main support reference of the large end. Together with the bottom floating support of the second floating head 2216 on the small end side, they form a multi-point bottom support system. When the upper double pressure arm 222 presses down, the lower floating support applies a reverse lifting force upward at the same time. The upper and lower forces cancel each other out, dispersing the concentrated stress of traditional two-end pressing into multiple points of force, effectively suppressing the bending deformation of the slender rod body and improving the machining shape and position accuracy.

[0025] During the positioning and clamping process, the first hydraulic lifting cylinder 226 and the second hydraulic lifting cylinder 2213 first drive the diamond pin 225 and the round pin to rise, completing the radial positioning of the connecting rod; then the two sets of floating support cylinders extend respectively to complete the lateral limit and bottom support; finally, the rotating cylinder 221 drives the double pressure arm 222 to rotate and press down. The action sequence is progressive, first positioning, then constraint, and finally clamping, to ensure the consistency of clamping accuracy.

[0026] Specifically, the tooling fixtures on this automotive connecting rod automated production line operate / are used as follows: 1. Initialization preparation: The equipment performs a power-on self-test, the air pipe 23 inside the clamping body 21 pre-purges each station, the robot drives the gripper 10 to reset to the blank picking position, and all cylinders and hydraulic cylinders are in the initial clearance state.

[0027] 2. Synchronous gripping and pre-positioning: The gripper 10 moves to the material area, the first finger cylinder 131 drives the large end inner support finger 132 to tighten the large end inner hole of the connecting rod, the second finger cylinder 141 drives the small end inner support finger 142 to tighten the small end inner hole, and the dual-axis cylinder 134 drives the pressure plate 135 to flatten the end face, gripping multiple connecting rods simultaneously and completing the pre-positioning.

[0028] 3. Multi-station synchronous feeding: The robot places the connecting rod on the large end support 227 and the unloading support 2214 of the workpiece clamping unit 20; after the anti-error rod 2217 detects that the workpiece posture is qualified, the gripper 10 releases the workpiece and exits the processing area.

[0029] 4. Progressive automatic clamping: The hydraulic system supplies oil and executes the process of "positioning first, then constraining, and finally clamping": the first hydraulic lifting cylinder 226 and the second hydraulic lifting cylinder 2213 drive the diamond pin 225 and the round pin to rise respectively to complete the precise positioning; the first floating support cylinder 2210 drives the first floating support head 2211 to be laterally limited, and the second floating support cylinder 2215 drives the second floating support head 2216 to be lifted on the bottom surface; the rotating cylinder 221 drives the double pressure arm 222 to rotate and press down to complete the clamping.

[0030] 5. Automatic chip removal during machining: When the machine tool is cutting, the air pipe 23 built into the fixture 21 blows away the iron chips in a directional manner, and the iron chips are discharged through the chip removal plate 228; if necessary, water can be introduced into the air channel to clean the surface of the fixture 21.

[0031] 6. Unloading cycle production: After processing, the fixture releases the workpiece, and the air pipe 23 blows the station a second time; the gripper 10 simultaneously grabs the finished product for unloading, and then grabs the new blank for loading, and the unmanned automated production is executed in a cycle.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A tooling fixture for an automated production line for automotive connecting rods, comprising a gripper (10) mounted on the end effector of a robot, characterized in that, The gripper (10) includes a top plate (11) connected to the end of the robot. Both sides of the bottom of the top plate (11) are equipped with large-end inner support components (13) through multiple mounting seats (12), and small-end inner support components (14) are also equipped on the multiple mounting seats (12). The large-end inner support components (13) and small-end inner support components (14) can clamp multiple links simultaneously under the drive of the robot. It also includes a workpiece clamping unit (20) installed on the machine tool. The workpiece clamping unit (20) includes a clamping body (21) installed on the machine tool. Multiple connecting rods clamped by the gripper (10) are clamped at multiple points by a three-point positioning component (22) assembled on the clamping body (21) so that the connecting rods are not deformed due to concentrated force. The clamping body (21) is an integrated structure, and an air blowing channel is provided inside the clamping body (21). During the processing, the connecting rod achieves directional cleaning of the generated iron filings through the air blowing pipe (23) assembled in the air blowing channel.

2. The tooling fixture for an automated production line of automotive connecting rods according to claim 1, characterized in that, The three-point positioning assembly (22) includes a rotating cylinder (221) fixed on the clamping body (21), and a double pressure arm (222) is mounted on the top of the rotating cylinder (221). A first guide seat (223) is fixed on the clamping body (21) between the two rotating cylinders (221), and a first slide rod (224) is inserted into the first guide seat (223). A diamond pin (225) is mounted on the top of the first slide rod (224).

3. The tooling fixture for an automated production line of automotive connecting rods according to claim 2, characterized in that, A first hydraulic lifting cylinder (226) is mounted on one side of the inner top wall of the clamping body (21) by means of a first cylinder seat. One end of the first hydraulic lifting cylinder (226) is connected to the bottom end of the first slide rod (224). A large end support (227) connected to the clamping body (21) is sleeved on the outer surface of the first guide seat (223). A chip removal plate (228) is sleeved on the bottom end of the large end support (227). An anti-error rod (2217) is installed in the middle of one side of the upper surface of the large end support (227).

4. The tooling fixture for an automated production line of automotive connecting rods according to claim 3, characterized in that, A float support (229) is mounted on one side of the upper surface of the clamping body (21), and a first float cylinder (2210) is installed on the inner side of the float support (229), and a first float head (2211) is mounted on one end of the first float cylinder (2210).

5. The tooling fixture for an automated production line of automotive connecting rods according to claim 4, characterized in that, A second guide seat (2218) is fixed on the side of the clamping body (21) near the first floating support cylinder (2210), and a second slide rod (2212) is inserted into the second guide seat (2218). The top end of the second slide rod (2212) is equipped with a round pin corresponding to the small end of the connecting rod. On the other side of the inner top wall of the clamping body (21), a second hydraulic lifting cylinder (2213) is installed by installing a second oil cylinder seat, and one end of the second hydraulic lifting cylinder (2213) is connected to the bottom end of the second slide rod (2212).

6. The tooling fixture for an automated production line of automotive connecting rods according to claim 5, characterized in that, A feeding support (2214) for supporting the connecting rod is fixed on one side of the upper surface of the second guide seat (2218). A second floating support cylinder (2215) is assembled on one side of the feeding support (2214), and a second floating support head (2216) is assembled at one end of the second floating support cylinder (2215).

7. The tooling fixture for an automated production line of automotive connecting rods according to claim 2, characterized in that, The large end inner support assembly (13) includes a first finger cylinder (131) mounted on the bottom of the mounting base (12). A large end inner support finger (132) is mounted on the first finger cylinder (131) via a guide rail. An mounting ring (133) is mounted on the outer wall of the first finger cylinder (131). A dual-axis cylinder (134) is mounted on one side of the upper surface of the mounting ring (133), and a pressure plate (135) is mounted on one end of the piston rod of the dual-axis cylinder (134).

8. The tooling fixture for an automated production line of automotive connecting rods according to claim 7, characterized in that, The small end inner support assembly (14) includes a second finger cylinder (141) mounted on the other side of the bottom of the mounting base (12), and a small end inner support finger (142) is mounted on the second finger cylinder (141) via a guide rail.

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