Connecting rod production line

Abstract

The utility model relates to the technical field of production lines, and particularly discloses a connecting rod production line which comprises a machine frame, a feeding mechanism, a saw cutting mechanism, a flattening mechanism, a punching mechanism, a welding mechanism, a drilling mechanism and a deburring mechanism, according to the square tube machining device, the square tube can be sequentially subjected to saw cutting, square tube head flattening, square tube tail welding hole punching, square tube tail threaded connector welding, square tube head sleeve welding, sleeve oil hole drilling, sleeve deburring and other machining, automatic machining of the square tube can be achieved, the automation degree is high, the labor cost can be reduced, meanwhile, the production efficiency can be improved, and the production cost is reduced. Meanwhile, the supporting effect of the square pipe in the steps of punching, welding, deburring and the like can be achieved through the first clamping groove in the supporting base, meanwhile, the square pipe can be separated from the first clamping groove through the supporting block capable of ascending and descending to move laterally, the supporting effect of the square pipe is guaranteed, and the working efficiency of the square pipe is improved. And it is ensured that the square pipe can automatically move through the feeding platform, and automatic machining of each step is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of production lines, in particular to a connecting rod production line. Background Art

[0002] The connecting rod is a frequently used component of hydraulic components. It is generally assembled from rectangular or square welded pipes. However, the existing equipment needs to be processed step by step, and multiple equipment is required to cooperate with cutting, flattening and punching, welding threaded connectors, welding sleeves, drilling oil holes in sleeves, and deburring. Therefore, it has the following problems:

[0003] 1. Each process is done manually, with low automation and high cost;

[0004] 2. Square tubes need to be manually moved multiple times during the processing, which is time-consuming and has low production efficiency. Summary of the invention

[0005] The utility model is made in consideration of the above-mentioned problems, and the purpose of the utility model is to provide a connecting rod production line, which can realize the full-automatic production of connecting rods, improve production efficiency and reduce costs.

[0006] To achieve the above-mentioned purpose, the utility model provides a connecting rod production line for assembling a threaded connector and a sleeve onto a square tube, comprising a frame and a sawing mechanism, a flattening mechanism, a punching mechanism, a welding mechanism and a deburring mechanism located on the frame;

[0007] The frame is provided with a feeding channel and a feeding platform, the sawing mechanism is located at one side of the feeding channel, the flattening mechanism is located at the tail end of the feeding channel and between the feeding channel and the feeding platform, the outlet of the flattening mechanism is connected with the inlet of the feeding platform, and the punching mechanism, the welding mechanism and the deburring mechanism are sequentially arranged between the inlet and the outlet of the feeding platform;

[0008] The square tube can be movably placed on the feeding channel and can be moved to the flattening mechanism through the sawing mechanism. The feeding platform can drive the square tube to pass through the punching mechanism, the welding mechanism and the deburring mechanism in sequence; wherein,

[0009] The welding mechanism includes a first welding assembly and a second welding assembly located on both sides of the feeding platform symmetrically. The first welding assembly is used to weld the threaded connector to the tail of the square tube, and the second welding assembly is used to weld the sleeve to the head of the square tube.

[0010] According to the connecting rod production line described above, the feeding platform has a first side and a second side opposite to each other, the inlet of the feeding platform is arranged on the first side, the frame outside the first side is provided with a punching station, a first welding station and a second welding station in sequence, the frame outside the second side is provided with a third welding station and a deburring station in sequence, and the third welding station is located on a side symmetrical to the first welding station;

[0011] The punching mechanism is located on the punching station, the first welding assembly includes a first welding head and a second welding head, the first welding head is located on the first welding station, the second welding head is located on the second welding station, the second welding assembly includes a third welding head, and the third welding head is located on the third welding station.

[0012] According to the above-mentioned connecting rod production line, the punching mechanism includes a fixed seat and a stamping assembly, and the stamping assembly includes a stamping cylinder fixed on the fixed seat, a stamping platform movably arranged under the fixed seat by the stamping cylinder, and a stamping head fixed under the stamping platform. When the feeding platform drives the tail end of the square tube to move to the punching station, the stamping head can be lowered to punch the square tube and form welding holes on both sides symmetrically at the tail end of the square tube.

[0013] According to the above-mentioned connecting rod production line, the flattening mechanism includes a first positioning assembly and a pressing assembly, the first positioning assembly includes a first positioning platform and a first clamping seat arranged on the first positioning platform, the pressing assembly includes a pressing cylinder fixed on the fixed seat and a pressing head connected to the piston rod of the pressing cylinder at one end, when the square tube moves into the first clamping seat through the sawing mechanism, the pressing head can be lowered to press down the head of the square tube.

[0014] According to the connecting rod production line described above, the feeding platform includes a support assembly and a side shift assembly, the support assembly includes a support base fixed on the top of the frame, a support bottom plate located in the support base, and a lifting cylinder located at the bottom of the frame, and the side shift assembly includes a support frame slidably arranged on the support bottom plate through a first guide rail, a top frame movably arranged above the support base, and a side shift cylinder fixed at one end of the support base;

[0015] The piston rod of the lifting cylinder is connected to the bottom of the supporting base plate, and the piston rod of the side shift cylinder is connected to one end of the supporting frame. When the lifting cylinder drives the supporting base plate to rise, the supporting base plate can drive the square tube and the top frame to rise through the supporting frame. At this time, the side shift cylinder can drive the square tube to move sideways through the supporting frame.

[0016] According to the connecting rod production line described above, a plurality of first card slots arranged at intervals are provided on both sides of the support base, and the plurality of first card slots respectively correspond to the punching station, the first welding station, the second welding station and the deburring station, and second card slots corresponding to the first card slots are provided on both sides of the top frame. When the top frame is placed on the support base, the first card slots and the second card slots are combined to form a circular limiting slot, and both ends of the square tube can be extended into the limiting slot.

[0017] According to the connecting rod production line described above, multiple groups of two-way symmetrical support blocks are provided on both sides of the support frame, and a third slot is provided on the support block. When the lifting cylinder drives the support base plate to rise, the support base plate can drive the support block to rise, and both ends of the multiple square tubes can be inserted into the third slot, and the support block can drive the square tube to disengage from the first slot.

[0018] According to the connecting rod production line described above, the first welding assembly further includes a first clamping turntable located at the first welding station, a first vibrating plate located at one side of the first welding station, and a second clamping turntable located at the second welding station, the first vibrating plate is used to provide a threaded connection head for the first welding assembly, when the tail end of the square tube is located at the first welding station, the tail end of the square tube can extend into the first clamping turntable, and the first clamping turntable can drive the square tube to rotate, so as to drive both of the welding holes to face the first welding head;

[0019] When the tail end of the square tube is located at the second welding station, the tail end of the square tube can extend into the second clamping turntable, and the second clamping turntable can drive the square tube to rotate, so as to drive the tail end of the square tube to rotate toward the second welding head.

[0020] According to the connecting rod production line described above, it also includes a drilling mechanism, the second welding assembly also includes a second vibration plate, the second vibration plate is located on one side of the third welding station and is used to provide a sleeve for the second welding assembly, and the second welding head is used to weld the sleeve to the head of the square tube;

[0021] The drilling mechanism is disposed between the second welding assembly and the deburring mechanism and is used to drill a hole in the sleeve to form an oil hole;

[0022] The deburring mechanism is used to remove burrs in the sleeve.

[0023] According to the connecting rod production line described above, the sawing mechanism includes a second positioning assembly and a sawing assembly, the second positioning assembly includes a second positioning platform, the square tube can be placed on the second positioning platform, and the sawing assembly includes a first support seat whose middle part is connected to the second positioning platform, a sawing motor fixed in one end of the first support seat, a sawing blade connected to the output shaft of the sawing motor, and a lifting cylinder connected to the other end of the first support seat;

[0024] The connecting rod production line also includes a feeding mechanism, which includes a third positioning assembly and a driving assembly. A second guide rail is laid on the feeding track. The third positioning assembly includes a third positioning platform movably arranged on the second guide rail. The driving assembly includes a driving cylinder. The piston rod of the driving cylinder is connected to the third positioning platform and can drive the second positioning platform to one side of the sawing mechanism.

[0025] The utility model has the following beneficial effects: the production line can be used to realize multiple processing steps of sawing, flattening, punching, welding threaded connectors, welding sleeves, sleeve oiling holes and sleeve deburring of square tubes, etc., with a high degree of automation, which can greatly improve production efficiency and significantly reduce labor costs. At the same time, the first clamping groove on the support seat can play a supporting role in the steps of punching, welding and deburring, and at the same time, a liftable support block can make the square tube detach from the first clamping groove and move sideways, which not only ensures the supporting effect on the square tube, but also ensures that the square tube can be automatically moved through the feeding platform to complete the automatic processing of each step. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0027] Figure 2 is another perspective view of the overall structure of the embodiment;

[0028] Figure 3 It is a schematic diagram of the structure on both sides of the feeding platform of the embodiment.

[0029] In the figure:

[0030] 1. Square tube; 11. Threaded connector; 12. Sleeve;

[0031] 2. Frame; 21. Second guide rail;

[0032] 3. Sawing mechanism; 311. second positioning platform; 321. first support seat; 322. sawing blade; 323. lifting cylinder;

[0033] 4. Flattening mechanism; 411. First positioning platform; 421. Lower pressure head;

[0034] 5. Punching mechanism; 51. Fixed seat; 521. Punching platform; 522. Punching head;

[0035] 6. Welding mechanism; 611. First welding head; 612. Second welding head; 613. First clamping turntable; 614. First vibration plate; 615. Second clamping turntable; 62. Second welding assembly; 621. Third welding head; 622. Second vibration plate;

[0036] 7. Deburring mechanism;

[0037] 8. Feeding platform; 811. Support base; 812. Support bottom plate; 821. Support frame; 821a. Support block; 821b. Third card slot; 822. Top frame; 823. Side shift cylinder;

[0038] 9. Feeding mechanism; 91. Third positioning platform; 92. Driving cylinder;

[0039] 10. Drilling mechanism. DETAILED DESCRIPTION

[0040] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0041] like Figure 1-3 As shown, a connecting rod production line includes a frame 2 and a feeding mechanism 9, a sawing mechanism 3, a flattening mechanism 4, a punching mechanism 5, a welding mechanism 6, a drilling mechanism 10 and a deburring mechanism 7 located on the frame 2. The square tube 1 can be sawed, the head of the square tube 1 can be flattened, a welding hole can be punched at the tail of the square tube 1, a threaded connector 11 can be welded at the tail of the square tube 1, a sleeve 12 can be welded at the head of the square tube 1, an oil hole can be drilled in the sleeve 12, and the sleeve 12 can be deburred, etc. The square tube 1 can be automatically processed to obtain a processed connecting rod. The high degree of automation can reduce labor costs and greatly improve production efficiency.

[0042] Specifically, a loading channel and a feeding platform 8 are provided on the frame 2. The loading channel is used for loading the square tube 1, and the feeding platform 8 is used for driving the square tube 1 to pass through the punching mechanism 5, the welding mechanism 6, the drilling mechanism and the deburring mechanism 7 in sequence, wherein the sawing mechanism 3 is located on one side of the loading channel, the flattening mechanism 4 is located at the tail end of the loading channel and between the loading channel and the feeding platform 8, the outlet of the flattening mechanism 4 is connected with the inlet of the feeding platform 8, the punching mechanism 5, the welding mechanism 6 and the deburring mechanism 7 are arranged in sequence between the inlet and the outlet of the feeding platform 8, and after the square tube 1 is loaded, it passes through the sawing mechanism 3, the flattening mechanism 4, the punching mechanism 5, the welding mechanism 6, the drilling mechanism and the deburring mechanism 7 in sequence, and is processed in sequence, and in this embodiment, after the first square tube 1 passes through the sawing mechanism 3, the second square tube 1 can be loaded into the sawing mechanism 3, that is, multiple square tubes 1 can be processed at the same time, further improving the processing efficiency.

[0043] Specifically, a second guide rail 21 is laid on the feeding channel, and the feeding mechanism 9 includes a third positioning component and a driving component. The second guide rail 21 is laid on the feeding channel, and the third positioning component includes a third positioning platform 91 movably arranged on the second guide rail 21. The driving component includes a driving cylinder 92, and the piston rod of the driving cylinder 92 is connected to the third positioning platform 91, and the second positioning platform 311 can be driven to one side of the sawing mechanism 3, that is, a feeding station can be set on the frame 2, and the initial square tube 1 material is placed on the third positioning platform 91 manually or by a robot at the feeding station. In this embodiment, a clamping member and a clamping cylinder are provided on the third positioning platform 91, and the clamping member is driven by the clamping cylinder to position the square tube 1, and the third positioning platform 91 is driven to move on the second guide rail 21 by the driving cylinder 92, and it is driven to one side of the sawing mechanism 3, and then the square tube 1 is placed in the sawing mechanism 3.

[0044] Specifically, the sawing mechanism 3 includes a second positioning component and a sawing component. The second positioning component includes a second positioning platform 311. The square tube 1 can be placed on the second positioning platform 311. The sawing component includes a first support seat 321 whose middle part is connected to the second positioning platform 311, a sawing motor fixed in one end of the first support seat 321, a sawing blade 322 connected to the output shaft of the sawing motor, and a lifting cylinder 323 connected to the other end of the first support seat 321. Similarly, there is also a The clamping piece is used to clamp the square tube 1 to prevent the square tube 1 from moving during the cutting process. When the sawing motor drives the sawing blade 322 to rotate, it only needs to drive one end of the first support seat 321 to rise through the lifting cylinder 323, and the other end will drive the sawing blade 322 to descend, so as to saw the square tube 1 located on the second positioning platform 311 to obtain the square tube 1 of a preset length. After sawing, the head of the square tube 1 is flattened by the flattening mechanism 4, and the tail of the square tube 1 is punched by the punching mechanism 5.

[0045] Specifically, the feeding platform 8 has a first side and a second side opposite to each other, the inlet of the feeding platform 8 is arranged on the first side, the welding mechanism 6 includes a first welding assembly and a second welding assembly 62 located on both sides of the feeding platform 8 symmetrically, wherein the first welding assembly is located on the first side of the feeding platform 8, and the second welding assembly 62 is located on the second side of the feeding platform 8, wherein the first welding assembly includes a first welding head 611 and a second welding head 612, the second welding assembly 62 includes a third welding head 621, and a punching station, a first welding station and a second welding station are sequentially arranged on the frame 2 on the outer side of the first side, and a third welding station and a deburring station are sequentially arranged on the frame 2 on the outer side of the second side, and the third welding station The workstation is located on a symmetrical side of the first welding station, wherein the punching mechanism 5 is located on the punching station, the first welding head 611 is located on the first welding station, the second welding head 612 is located on the second welding station, and the third welding head 621 is located on the third welding station. The first welding head 611 is used to weld the threaded connector 11 and the portion corresponding to the welding hole, the second welding head 612 is used to weld the circumferential gap between the tail end of the square tube 1 and the threaded connector 11, and the third welding head 621 is used to weld between the head of the square tube 1 and the sleeve 12. Since the third welding station is located on a symmetrical side of the first welding station, the head and tail of the square tube 1 can be welded synchronously on both sides to improve its work efficiency.

[0046] Specifically, the punching mechanism 5 includes a fixed seat 51 and a stamping assembly, and the stamping assembly includes a stamping cylinder fixed on the fixed seat, a stamping platform 521 movably arranged under the fixed seat by the stamping cylinder, and a stamping head 522 fixed under the stamping platform 521. When the feeding platform 8 drives the tail end of the square tube 1 to move to the punching station, the stamping head 522 can be lowered to punch the square tube 1 and form welding holes on both sides symmetrically at the tail end of the square tube 1. During the forming process of the welding holes, the stamping cylinder drives the stamping platform 521 to descend, and the stamping platform 521 drives the stamping head 522 to descend. The stamping head 522 punches the square tube 1 and punches welding holes on both sides symmetrically at the tail end of the square tube 1 to ensure the stability of the welding.

[0047] Specifically, the flattening mechanism 4 includes a first positioning component and a pressing component. The first positioning component includes a first positioning platform 411 and a first clamping seat arranged on the first positioning platform 411. The pressing component includes a pressing cylinder fixed on the fixed seat and a pressing head 421 with one end connected to the piston rod of the pressing cylinder. When the square tube 1 moves into the first clamping seat through the sawing mechanism 3, the pressing head 421 can be lowered to press down the head of the square tube 1. The head of the square tube 1 can be used for welding the sleeve 12 only after being flattened.

[0048] In order to provide a threaded connector 11 for the first welding component and a sleeve 12 for the second welding component 62, the first welding component also includes a first vibration plate 614, which is located on one side of the first welding station. The first vibration plate 614 is used to provide a threaded connector 11 for the first welding component. The second welding component 62 also includes a second vibration plate 622, which is located on one side of the third welding station. The second vibration plate 622 is used to provide a sleeve 12 for the second welding component 62.

[0049] Specifically, the feeding platform 8 includes a supporting assembly and a side shifting assembly. The supporting assembly includes a supporting base 811 fixed on the top of the frame 2, a supporting bottom plate 812 located in the supporting base 811, and a lifting cylinder located at the bottom of the frame 2. The side shifting assembly includes a supporting frame 821 slidably arranged on the supporting bottom plate 812 through a first guide rail, a top frame 822 movably arranged above the supporting base 811, and a side shifting cylinder 823 fixed at one end of the supporting base 811. The piston rod of the lifting cylinder is connected to the supporting bottom plate 812. The bottom is connected, and the piston rod of the side shift cylinder 823 is connected to one end of the support frame 821. When the lifting cylinder drives the support bottom plate 812 to rise, the support bottom plate 812 can drive the square tube 1 and the top frame 822 to rise through the support frame 821. At this time, the side shift cylinder 823 can drive the square tube 1 to move sideways through the support frame 821, that is, in this embodiment, the square tube 1 can be driven to rise and the top frame 822 can be lifted up through the square tube 1. At this time, the side shift cylinder 823 can drive the square tube 1 to move sideways through the support frame 821 to adjust the position of the square tube 1.

[0050] In order to ensure the stability of the square tube 1 during processing, a plurality of first card slots are arranged at intervals on both sides of the support base 811, and the plurality of first card slots respectively correspond to the punching station, the first welding station, the second welding station and the deburring station. Second card slots corresponding to the first card slots are provided on both sides of the top frame 822. When the top frame 822 is placed on the support base 811, the first card slots and the second card slots are combined to form a circular limiting groove. Both ends of the square tube 1 can be extended into the limiting groove. The limiting groove limits the large movement of the square tube 1. At the same time, the support base 811 can provide support for the square tube 1 during the punching, welding and deburring processes to ensure processing accuracy.

[0051] In order to ensure that the square tube 1 can move smoothly, multiple groups of symmetrical support blocks 821a are provided on both sides of the support frame 821, and a third clamping groove 821b is provided on the support block 821a. When the lifting cylinder drives the support base plate 812 to rise, the support base plate 812 can drive the support block 821a to rise, and both ends of multiple square tubes 1 can be inserted into the third clamping groove 821b, and the support block 821a can drive the square tube 1 to disengage from the first clamping groove, that is, when the lifting cylinder drives the support base plate 812 to rise, the support base plate 812 can drive the support frame 821 to rise, and then drive the support blocks 821a on both sides of the support frame 821 to rise synchronously. During the rising process, the support block 821a will connect with the two ends of the square tube 1 and drive the square tube 1 to rise. When the square tube 1 rises to disengage from the first clamping groove, the side shift cylinder 823 can drive the support frame 821 to drive the square tube 1 to move sideways to adjust the processing position.

[0052] In order to achieve the positioning and multi-angle welding of the multi-square tube 1, the first welding assembly also includes a first clamping turntable 613 located at the first welding station and a second clamping turntable 615 located at the second welding station. When the tail end of the square tube 1 is located at the first welding station, the tail end of the square tube 1 can be extended into the first clamping turntable 613, and the first clamping turntable 613 is used to position the square tube 1. The first clamping turntable 613 can drive the square tube 1 to rotate, so as to drive both welding holes to face the first welding head 611, that is, welding at the two welding holes can be achieved, and the stability of the initial welding can be ensured. When the tail end of the square tube 1 moves to the second welding station, the tail end of the square tube 1 can be extended into the second clamping turntable 615, and the second clamping turntable 615 can drive the square tube 1 to rotate, so as to drive the tail end of the square tube 1 to rotate toward the second welding head 612, so as to achieve circumferential welding of the tail end of the square tube 1.

[0053] Specifically, the drilling mechanism 10 is located between the second welding assembly 62 and the deburring mechanism 7, and is used to drill a hole in the sleeve 12 to form an oil hole. After the oil hole is processed, the burrs in the sleeve 12 are removed by the deburring mechanism 7 to meet the requirements of the finished product. In this embodiment, the deburring mechanism 7 removes the burrs in the sleeve 12 by pressing a deburring ball into the sleeve 12.

[0054] The technical solution of the utility model is described in detail above in conjunction with the accompanying drawings, and the described embodiments are used to help understand the idea of ​​the utility model. The specific embodiments described herein are merely examples of the spirit of the utility model. A person skilled in the art of the utility model may make various modifications or supplements to the described specific embodiments or replace them in a similar manner, but this will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

[0055] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0056] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A connecting rod production line for assembling threaded connectors and sleeves onto square tubes, characterized in that: It comprises a frame and a sawing mechanism, a flattening mechanism, a punching mechanism, a welding mechanism and a deburring mechanism located on the frame; The frame is provided with a feeding channel and a feeding platform, the sawing mechanism is located at one side of the feeding channel, the flattening mechanism is located at the tail end of the feeding channel and between the feeding channel and the feeding platform, the outlet of the flattening mechanism is connected with the inlet of the feeding platform, and the punching mechanism, the welding mechanism and the deburring mechanism are sequentially arranged between the inlet and the outlet of the feeding platform; The square tube can be movably placed on the feeding channel and can be moved to the flattening mechanism through the sawing mechanism. The feeding platform can drive the square tube to pass through the punching mechanism, the welding mechanism and the deburring mechanism in sequence; wherein, The welding mechanism includes a first welding assembly and a second welding assembly located on both sides of the feeding platform symmetrically. The first welding assembly is used to weld the threaded connector to the tail of the square tube, and the second welding assembly is used to weld the sleeve to the head of the square tube.

2. A connecting rod production line according to claim 1, characterized in that: The feeding platform has a first side and a second side opposite to each other, the inlet of the feeding platform is arranged on the first side, a punching station, a first welding station and a second welding station are arranged on the frame outside the first side in sequence, a third welding station and a deburring station are arranged on the frame outside the second side in sequence, and the third welding station is located on a side symmetrical to the first welding station; The punching mechanism is located on the punching station, the first welding assembly includes a first welding head and a second welding head, the first welding head is located on the first welding station, the second welding head is located on the second welding station, the second welding assembly includes a third welding head, and the third welding head is located on the third welding station.

3. A connecting rod production line according to claim 2, characterized in that: The punching mechanism includes a fixed seat and a stamping assembly, and the stamping assembly includes a stamping cylinder fixed on the fixed seat, a stamping platform movably arranged under the fixed seat by the stamping cylinder, and a stamping head fixed under the stamping platform. When the feeding platform drives the tail end of the square tube to move to the punching station, the stamping head can be lowered to punch the square tube and form welding holes on both sides symmetrically of the tail end of the square tube.

4. A connecting rod production line according to claim 3, characterized in that: The flattening mechanism includes a first positioning assembly and a pressing assembly, the first positioning assembly includes a first positioning platform and a first clamping seat arranged on the first positioning platform, the pressing assembly includes a pressing cylinder fixed on the fixed seat and a pressing head with one end connected to the piston rod of the pressing cylinder, when the square tube moves into the first clamping seat through the sawing mechanism, the pressing head can be lowered to press down the head of the square tube.

5. A connecting rod production line according to claim 3, characterized in that: The feeding platform includes a support assembly and a side shift assembly, wherein the support assembly includes a support base fixed on the top of the frame, a support bottom plate located inside the support base, and a lifting cylinder located at the bottom of the frame, and the side shift assembly includes a support frame slidably arranged on the support bottom plate through a first guide rail, a top frame movably arranged above the support base, and a side shift cylinder fixed at one end of the support base; The piston rod of the lifting cylinder is connected to the bottom of the supporting base plate, and the piston rod of the side shift cylinder is connected to one end of the supporting frame. When the lifting cylinder drives the supporting base plate to rise, the supporting base plate can drive the square tube and the top frame to rise through the supporting frame. At this time, the side shift cylinder can drive the square tube to move sideways through the supporting frame.

6. A connecting rod production line according to claim 5, characterized in that: A plurality of first card slots are arranged at intervals on both sides of the support base, and the plurality of first card slots respectively correspond to the punching station, the first welding station, the second welding station and the deburring station. Second card slots corresponding to the first card slots are provided on both sides of the top frame. When the top frame is placed on the support base, the first card slots and the second card slots are combined to form a circular limiting slot, and both ends of the square tube can be extended into the limiting slot.

7. A connecting rod production line according to claim 6, characterized in that: A plurality of groups of symmetrical support blocks are provided on both sides of the support frame, and a third slot is provided on the support block. When the lifting cylinder drives the support base plate to rise, the support base plate can drive the support block to rise, and both ends of the plurality of square tubes can be inserted into the third slot, and the support block can drive the square tube to disengage from the first slot.

8. A connecting rod production line according to claim 6, characterized in that: The first welding assembly further comprises a first clamping turntable located at the first welding station, a first vibrating plate located at one side of the first welding station, and a second clamping turntable located at the second welding station, wherein the first vibrating plate is used to provide a threaded connector for the first welding assembly, and when the tail end of the square tube is located at the first welding station, the tail end of the square tube can extend into the first clamping turntable, and the first clamping turntable can drive the square tube to rotate, so as to drive both the welding holes to face the first welding head; When the tail end of the square tube is located at the second welding station, the tail end of the square tube can extend into the second clamping turntable, and the second clamping turntable can drive the square tube to rotate, so as to drive the tail end of the square tube to rotate toward the second welding head.

9. A connecting rod production line according to claim 2, characterized in that: It also includes a drilling mechanism, the second welding assembly also includes a second vibration plate, the second vibration plate is located at one side of the third welding station and is used to provide a sleeve for the second welding assembly, and the second welding head is used to weld the sleeve to the head of the square tube; The drilling mechanism is disposed between the second welding assembly and the deburring mechanism and is used to drill a hole in the sleeve to form an oil hole; The deburring mechanism is used to remove burrs in the sleeve.

10. A connecting rod production line according to claim 1, characterized in that: The sawing mechanism includes a second positioning assembly and a sawing assembly, the second positioning assembly includes a second positioning platform, the square tube can be placed on the second positioning platform, the sawing assembly includes a first support seat whose middle part is connected to the second positioning platform, a sawing motor fixed in one end of the first support seat, a sawing blade connected to the output shaft of the sawing motor, and a lifting cylinder connected to the other end of the first support seat; The connecting rod production line also includes a feeding mechanism, which includes a third positioning assembly and a driving assembly. A second guide rail is laid on the feeding track. The third positioning assembly includes a third positioning platform movably arranged on the second guide rail. The driving assembly includes a driving cylinder. The piston rod of the driving cylinder is connected to the second positioning platform and can drive the third positioning platform to one side of the sawing mechanism.

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