CN215880723U

CN215880723U - Piston production line

Info

Publication number: CN215880723U
Application number: CN202121595060.4U
Authority: CN
Inventors: 沈天宇
Original assignee: Wuxi Huaxing Mechanical And Electrical Manufacture Co ltd
Current assignee: Wuxi Huaxing Mechanical And Electrical Manufacture Co ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2022-02-22
Anticipated expiration: 2031-07-13

Abstract

The utility model relates to a piston production line which comprises a conveying mechanism and an excircle processing mechanism hole processing mechanism, wherein the hole processing mechanism is arranged close to the excircle processing mechanism and is used for processing a pin hole of a piston; the first detection mechanism is used for detecting the outer diameter of the piston; and the second detection mechanism is arranged close to the first detection mechanism and is used for detecting the pin hole of the piston. According to the utility model, the automatic machining of the piston can be realized by adding the hole machining mechanism and the excircle machining mechanism, on one hand, the precision of the piston can be improved by an automatic machining mode, the service life and the working reliability of an engine during subsequent assembly can be effectively ensured, and on the other hand, the time and labor are saved by the automatic machining mode, and the production efficiency can be effectively improved.

Description

Piston production line

Technical Field

The utility model relates to the field of mechanical automation equipment, in particular to a piston production line capable of realizing automatic processing and automatic detection.

Background

The piston is used as an important part of an engine, such as a diesel engine, a gas engine and other alternative fuel pistons, is applied to severe working conditions such as high temperature, high pressure, high speed and the like, and bears alternating load, so that the consistency and the precision of piston manufacture are closely related to the service life and the working reliability of the engine.

Most of the existing diesel engine piston production lines are difficult to separate from manual work, manual production and detection are time-consuming and labor-consuming, the efficiency and the manufacturing consistency of piston production are greatly limited, and full-automatic processing and detection of pistons cannot be realized.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a piston production line that solves one or more of the problems of the prior art.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

the piston production line comprises

The conveying mechanism is used for loading and moving at least one piston;

the outer circle machining mechanism is arranged close to the conveying mechanism and used for machining the outer diameter of the piston;

the hole machining mechanism is arranged close to the outer circle machining mechanism and used for machining a pin hole of the piston;

the first detection mechanism is used for detecting the outer diameter of the piston;

and the second detection mechanism is arranged close to the first detection mechanism and is used for detecting the pin hole of the piston.

Further, the conveying mechanism comprises a base part, a hydraulic part, a drawing part and a stage, wherein the base part is provided with a part connected with at least two universal wheels, the base part is provided with another part connected with one part of the hydraulic part, the other part of the hydraulic part is connected with one part of the drawing part, and the other part of the drawing part is connected with the stage, so that the hydraulic part is used for controlling the movement of the drawing part to realize the lifting of the stage.

Furthermore, the hydraulic part comprises a pump body and a cylinder body connected with the output end of the pump body, a cavity is formed in the cylinder body and is used for being connected with a cylinder rod, and the output end of the pump body is also connected with a handle through a connecting rod part.

Further, the outer circle machining mechanism comprises a first clamping part, a first cutting part and a first pressing part, wherein the first clamping part, the first cutting part and the first pressing part are arranged on the outer circle machining mechanism respectively

Further, the first clamping part comprises a first main shaft and a chassis connected with the first main shaft, and the chassis is connected with the shifting block through a first spigot seat;

further, the first cutting part comprises a power head and a turning tool connected with the power head;

further, the first pressing portion comprises a first tailstock and an apex connected with the first tailstock, and a pressing plate is connected to the outer side of the apex.

Further, the hole machining mechanism comprises a second clamping part, a second cutting part and a second pressing part, wherein the second clamping part, the second cutting part and the second pressing part are arranged on the same plane, and the second clamping part and the second cutting part are arranged on the same plane

Furthermore, the second clamping part comprises a carriage, the carriage is provided with a part of connecting installation seats, and at least two positioning pins are connected to the installation seats;

further, the second cutting portion comprises a second main shaft and a boring cutter connected with the second main shaft;

further, the second pressing part comprises a first air cylinder and a pressing plate connected with the output end of the first air cylinder.

Further, the hole machining mechanism further comprises a positioning portion, and the positioning portion comprises a second tailstock and a positioning mandrel connected with the second tailstock.

Furthermore, the first detection mechanism comprises a base, the base is connected with a sliding table through a transmission mechanism, and a second spigot seat is fixedly connected with the sliding table; the base is further connected with a stand column, at least one connecting disc is sleeved on the stand column, and a pair of measuring heads is further arranged on the connecting disc.

Furthermore, at least one buffer is arranged on the base.

Further, the connecting disc is provided with an opening, and the opening enables the connecting disc to form a U-shaped structure.

Furthermore, second detection mechanism includes the gas electric workstation, the gas electric workstation is connected with the gas electric converter electricity, measures the plug and connect in measure the seat, it has the gas jet orifice to measure the plug, the gas jet orifice has partly to connect the gas electric workstation through first trachea, the gas jet orifice has another part and connects the gas electric converter through the second trachea.

Compared with the prior art, the utility model has the following beneficial technical effects:

according to the utility model, the automatic machining of the piston can be realized by adding the hole machining mechanism and the excircle machining mechanism, on one hand, the precision of the piston can be improved by the automatic machining mode, the service life and the working reliability of an engine during subsequent assembly can be effectively ensured, on the other hand, the time and labor are saved by the automatic machining mode, and the production efficiency can be effectively improved.

Furthermore, the arrangement of the first detection device and the second detection device can realize full-automatic detection of the piston after the piston is used, and the detection precision and the detection efficiency are high.

Further, the arrangement of the conveying mechanism can facilitate the operation personnel to convey the batched parts to the designated positions, and the object stage can be further lifted and lowered according to the height of the operation personnel, so that the operation personnel can more conveniently grab the parts to perform automatic processing and automatic detection.

Drawings

Fig. 1 shows a schematic structural diagram of a conveying mechanism in a piston production line according to an embodiment of the utility model.

Fig. 2 shows a schematic structural diagram of an outer circle machining mechanism in the piston production line according to the embodiment of the utility model.

Fig. 3 shows a schematic structural diagram of a hole machining mechanism in a piston production line according to an embodiment of the utility model.

Fig. 4 shows a front view of a first detecting device in a piston production line according to an embodiment of the present invention.

Fig. 5 shows a top view of a first detection device in a piston production line according to an embodiment of the utility model.

Fig. 6 shows a top view of a second detection device in a piston production line according to an embodiment of the utility model.

In the drawings, the reference numbers: 100. a first base plate; 101. a universal wheel; 102. a connecting rod; 103. a support; 104. a connecting member; 105. a pump body; 106. a first mounting seat; 107. a cylinder body; 1071. a cylinder rod; 108. lifting lugs; 109. a first arm; 110. a second base plate; 111. a fixed shaft; 112. a second arm; 113. an object stage; 114. a handle; 2. a piston; 300. a power head; 301. turning a tool; 310. a first tailstock; 311. a tip; 312. pressing a plate; 320. shifting blocks; 321. a first spigot seat; 322. a chassis; 323. a first main shaft; 400. a first cylinder; 401. pressing a plate; 402. positioning seats; 403. a second main shaft; 404. boring cutter; 405. positioning pins; 406. a second mounting seat; 407. a carriage; 408. positioning the core rod; 409. a second tailstock; 500. a base; 501. a guide rail; 502. a slider; 503. a sliding table; 504. a second cylinder; 505. a buffer; 506. a second spigot seat; 507. a measuring head; 508. a support bar; 509. a connecting disc; 5091. an opening; 510. a column; 600. a gas-electric workstation; 601. a first air pipe; 6021. a first vent hole; 6022. a second vent hole; 603. measuring the core rod; 604. a measuring seat; 605. a second air pipe; 606. a gas-to-electric converter; 607. a compressed air input port; 608. and a gas injection hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the piston production line according to the present invention will be described in detail with reference to the accompanying drawings and embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

The piston production line comprises a conveying mechanism, wherein the conveying mechanism is used for mounting and moving at least one piston.

The structure of the conveying mechanism is described in detail below as follows:

referring to fig. 1, the conveying mechanism includes a base portion, a hydraulic portion, a drawing portion and a stage 113, the base portion has a portion connected to at least two universal wheels 101, the base portion has another portion connected to a portion of the hydraulic portion, another portion of the hydraulic portion is connected to a portion of the drawing portion, and another portion of the drawing portion is connected to the stage 113, so that the hydraulic portion controls the movement of the drawing portion to lift the stage 113.

Further, the base portion includes two first bottom plates 100 and second bottom plates 110 that are arranged oppositely, wherein two universal wheels 101 are connected to the bottom of first bottom plate 100, two universal wheels 101 are also connected to the bottom of second bottom plate 110, and a pair of connecting rods 102 is connected between first bottom plate 100 and second bottom plate 110.

Further, with continued reference to fig. 1, the hydraulic part includes a pump body 105 and a cylinder 107 connected to an output end of the pump body 105, the pump body 105 and the cylinder 107 are both disposed on the first mounting seat 106, the cylinder 107 has a cavity therein and is used for connecting with the cylinder rod 1071, the output end of the pump body 105 is further connected with a handle 114 through a connecting rod portion, specifically, the connecting rod portion includes a bracket 103 connected with the handle 114, a portion of the bracket 103 is rotatably connected with the bottom of the first base plate 100 through a lifting lug, another portion of the bracket 103 is connected with a portion of the connecting member 104 through a pin, and another portion of the connecting member 104 is connected with an input end of the pump body 105. The sealed volume inside the pump body 105 can be changed by continuously pressing the knob 114, thereby extending the cylinder rod 1071 in the cylinder 107 from the cylinder 107.

Further, with continued reference to fig. 1, the drafting section includes a pair of first arms 109 and a pair of second arms 112, wherein a portion of a lifting lug 108 is connected between one ends of the pair of first arms 109, the other portion of the lifting lug 108 is connected to the cylinder 1071, and the other end of the first arm 109 is connected to the stage 113. Similarly, one end of a pair of second arms 112 is movably connected to the inner side of the connecting rod 102, and the other end of the second arms 112 is also connected to the stage 113.

Further, with reference to fig. 1, each of the first arm 109 and the second arm 112 crosses each other and is connected at the crossing by a fixing shaft 111, so that the first arm 109 and the second arm 112 can rotate relative to the fixing shaft 111, and the object stage 113 can be lifted and lowered.

Accordingly, in order to ensure that the pressure in the pump body 105 can be vented, the pump body 105 is also provided with a pressure relief valve.

The specific structure of the outer circle machining mechanism is described in detail as follows:

referring to fig. 2, the outer circle machining means is disposed near the conveying means for machining the outer diameter of the piston 2. In this embodiment, the piston 2 on the transport mechanism stage 113 can be transferred to the cylindrical machining mechanism manually or by an automated means, such as a robot.

With reference to fig. 2, the outer circle machining mechanism includes a first clamping portion, a first cutting portion, and a first pressing portion, wherein the first clamping portion includes a first main shaft 323 and a chassis 322 connected to the first main shaft 323, the first main shaft 323 is driven by a power mechanism, such as a motor, to rotate, and the chassis 322 is connected to the shifting block 320 through a first stop seat 321.

The first cutting portion includes a power head 300 and a turning tool 301 connected to the power head 300, and in order to move the power head 300 in any direction, the power head 300 may be connected to a three-axis servo motion mechanism, which adopts a conventional known technology and may drive the power head 300 to move in an X direction, a Y direction, and a Z direction.

The first pressing part comprises a first tail frame 310 and an apex 311 connected with the first tail frame 310, a first pressing plate 312 is connected to the outer side of the apex 311, and the first pressing plate 312 can pass through the first tail frame 310 and is used for pressing and supporting the piston part to prevent the piston from being separated from the shifting block 320 under the action of transverse force during machining.

The specific structure of the hole machining mechanism is described below as follows:

referring to fig. 3, the hole machining mechanism is disposed near the outer circle machining mechanism for machining the pin hole of the piston.

Specifically, the hole machining mechanism comprises a second clamping part, a second cutting part and a second pressing part, wherein the second clamping part, the second cutting part and the second pressing part are arranged in parallel

The second clamping part comprises a carriage 407, one part of the carriage 407 is connected with the moving assembly, the other part of the carriage 407 is connected with the second mounting seat 406, and at least two positioning pins 405 are connected to the second mounting seat 406, further, a gap between the positioning pins 405 is slightly larger than the outer diameter of the piston part, so as to ensure that the piston part can be clamped into the gap between the positioning pins 405. Meanwhile, the moving assembly can be a two-axis moving platform with a known structure, the moving assembly can move in the X direction and the Y direction, the three-axis platform can be connected with a guide rail sliding block by adopting a linear guide rail, is connected with the guide rail sliding block by a nut structure in a screw-nut transmission mechanism, and is connected with a driving device by a screw rod so as to move in all directions.

Further, the second cutting portion includes a second main shaft 403 and a boring cutter 404 coupled to the second main shaft 403.

Further, the second pressing portion includes a first cylinder 400 and a second pressing plate 401 connected to an output end of the first cylinder 400.

Further, the hole machining mechanism further comprises a positioning part which comprises a second tailstock 409 and a positioning mandrel 408 connected with the second tailstock 409.

The specific structure of the first detection mechanism is described below as follows:

referring to fig. 4 and 5, the first detecting mechanism is used for detecting the outer diameter of the piston, and the first detecting mechanism includes a base 500, and the base 500 is connected to a sliding table 503 through a transmission mechanism, specifically, the transmission mechanism includes a sliding block 502 and a guide rail 501 connected to the sliding block 502, and the guide rail 501 is two guide rails and symmetrically disposed on the surface of the base 500. The second socket 506 is fixed to the sliding table 503, and the second socket 506 can be connected to an output end of the servo motor 511, so that the servo motor 511 controls the second socket 506 to rotate relative to the sliding table 503. The base 500 is further connected with a vertical column 510, at least one connecting disc 509 is sleeved on the vertical column 510, a pair of measuring heads 507 is further arranged on the connecting disc 509, and the pair of measuring heads 507 are oppositely arranged.

Further, at least one buffer 505 is further disposed on the base 500, specifically, the buffers 505 are fixed on the base 500 in tandem in the piston production line described in this embodiment, so as to prevent the sliding table 503 from passing through the sliding block

Further, the connecting pad 509 has an opening 5091, the opening 5091 forms the connecting pad 509 into a "U" shape, and in order to ensure the horizontality of mounting the connecting pad 509, a support rod 508 is connected to each of the left and right ends of the connecting pad 509 to ensure the upper and lower adjacent connecting pads 509 are parallel to each other.

The specific structure of the second detection mechanism is described below as follows:

the second detection mechanism is close to the first detection mechanism and is used for detecting whether the pin hole of the piston reaches the standard or not. Referring to fig. 6, the second detecting mechanism includes a gas-electric station 600, the gas-electric station 600 is electrically connected to a gas-electric converter 606, a measuring mandrel 603 is connected to a measuring base 604, the measuring mandrel 603 has a gas injection hole 608, the gas injection hole 608 radially penetrates through the measuring mandrel 603, a portion of the gas injection hole 608 is connected to one end of a first vent hole 6021, the other end of the first vent hole 6021 is connected to the gas-electric station 600 through a first gas pipe 601, the gas injection hole 608 has another portion connected to one end of a second vent hole 6022, the other end of the second vent hole 6022 is connected to the gas-electric converter 606 through a second gas pipe 605, and the first vent hole 6021 and the second vent hole 6022 are both opened inside the measuring mandrel 603.

The specific working process of the present invention is described below as follows:

referring to fig. 1, a plurality of pistons to be machined are placed on an object stage 113, and an operator pushes the conveying mechanism to the outer circle machining mechanism and the hole machining mechanism through a universal wheel 101, or the conveying mechanism may be conveyed to a designated position and then the piston to be machined is grasped by a manipulator to the outer circle machining mechanism and the hole machining mechanism.

When the device is used, the sealing volume in the pump body 105 can be changed by continuously pressing the handle, so that the cylinder rod 1071 in the cylinder body 107 extends out of the cylinder body 107, the first arm 109 is driven to rotate by the lifting lug 108 after the cylinder rod 1071 extends out, and the first arm 109 and the second arm 112 are rotatably connected through the fixed shaft 111, so that the second arm 112 is stressed and moves relative to the inner side of each connecting piece 104, and the distance between the adjacent first arm 109 and the second arm 112 is gradually reduced, so that the object stage 113 is gradually lifted. Conversely, as the distance between the first arm 109 and the second arm 112 gradually increases, the stage 113 gradually descends. The lifting of the object stage 113 can be suitable for operators with different heights to use, so that the time and labor are saved, and the working efficiency is improved.

Referring to fig. 2, an operator takes out the piston 2 from the object stage 113 and installs the piston 2 on the shifting block 320, presses the piston 2 to enable the piston 2 to be matched with the first spigot seat 321, controls the first tailstock 310 to enable the tip 311 to gradually extend out and approach the piston 2, further enables the first pressing plate 312 to tightly press the piston 2, then controls the first spindle 323 to rotate by the motor, the power head 300 drives the lathe tool 301 to rotate and move to the outer circle processing contacting the piston 2 through the three-axis servo motion mechanism, the power head 300 and the lathe tool 301 reset after the processing is completed, the first tailstock 310 releases the lathe back, the piston 2 is taken down, and at this time, the outer circle processing of the piston 2 is completed.

Referring to fig. 3, an operator sets the piston 2 with an outer circle processed against the positioning seat 402 and places the piston between the adjacent positioning pins 405, so as to axially position the piston 2, controls the positioning core rod 408 to contact the pin hole of the piston 2 through the second tailstock 409, makes the pin hole of the piston 2 adapt to the positioning core rod 408 as the positioning core rod 408 extends, completes the angular positioning of the piston, controls the second tailstock 409 to retract the positioning core rod 408, and drives the second pressing plate 401 to move downward and press the piston against the second mounting seat 406 by the first cylinder 400. Then, the second main shaft 403 is controlled to rotate by an external power device, the boring cutter 404 is driven to rotate by the rotation of the second main shaft 403, the carriage 407 is controlled by the moving device to move and gradually contacts with the boring cutter 404, so that the boring cutter 404 can extend into a pin hole of the piston for processing, after the processing is finished, the carriage 407 resets, the first air cylinder 400 controls the second pressing plate 401 to reset, and the piston 2 with the processed pin hole can be taken out.

Referring to fig. 4, before measuring the outer diameter of the piston 2, a standard block with a standard size is first installed in the second socket 506, and the second cylinder 504 drives the sliding table 503 and slides relative to the guide rail 501 via the sliding block 502, so that the standard block is pushed into the opening 5091 of the connecting disc 509. Referring to fig. 5, the probes 507 in each connecting pad 509, which are arranged from top to bottom, contact the outer diameter of the standard block and store the outer diameter of the standard block in an external data computer in advance, and then the standard block is reset by the second cylinder 504 to be withdrawn from the opening 5091 of the connecting pad 509. At this time, the standard block is replaced with a piston, the piston is pushed into the opening 5091 of the connecting disc 509 again in the above manner, the outer diameter of the piston is measured by the measuring head 507 and then compared with the outer diameter of the standard block, if the outer diameter of the piston is within a tolerance range of ± 0.015mm, the outer diameter of the piston is satisfactory, otherwise, the outer diameter of the piston is unsatisfactory.

When the outer diameter measurement of the piston 2 meets the requirement, the pin hole in the piston 2 is detected by the second detection mechanism, firstly compressed air is introduced into the measuring mandrel 603, the compressed air is introduced from the gas electric workstation 600 through the compressed air inlet 607, then the measuring mandrel 603 is introduced through the first air pipe 601 and the first vent hole 6021, the calibration gauge is sleeved on the measuring mandrel 603, then the compressed air is ejected from the gas ejection hole 608, the gas ejection hole 608 is symmetrically distributed by taking the axis of the measuring mandrel 603 as the center, the change of the gap between the gas ejection hole 608 and the inner wall of the calibration gauge standard hole is accurately measured by ejecting the compressed air from the gas ejection hole 608, then the change of the gas flow rate is fed back to the gas electric converter 606 through the second vent hole 6022 and the second air pipe 605, the gas flow signal is converted into an electric signal and transmitted to the gas electric workstation 600, and then the standard aperture in the calibration gauge is displayed in the external computer terminal, then the standard gauge is taken down and put into the piston 2 again, the pin hole of the piston 2 is butted with the measuring core rod 603, the inner diameter of the pin hole in the piston 2 is calculated by the same method, when the inner diameter of the pin hole meets the tolerance range of the standard aperture of the calibration gauge, the requirement is met, otherwise, the requirement is not met.

Correspondingly, in other embodiments of the present invention, the first detection mechanism and the second detection mechanism may further cooperate with SPC analysis software to count the number of processes of each shift of an enterprise and the qualified number of detected pistons, and the statistical report is sent to the corresponding quality inspection department mailbox, so as to improve the efficiency of detection and processing in the whole production line. The SPC is a Statistical Process Control (Statistical Process Control), which is a Process Control tool using a mathematical Statistical method. According to the feedback information, the method finds the sign of the systematic factors in time, takes measures to eliminate the influence, and maintains the process in a controlled state only influenced by the random factors, thereby achieving the purpose of controlling the quality.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. Piston production line, its characterized in that: the piston production line comprises

The conveying mechanism is used for loading and moving at least one piston;

2. The piston production line of claim 1, wherein: the conveying mechanism comprises a base part, a hydraulic part, a drafting part and an object stage, wherein the base part is provided with a part for connecting at least two universal wheels, the base part is provided with another part for connecting with one part of the hydraulic part, the other part of the hydraulic part is connected with one part of the drafting part, and the other part of the drafting part is connected with the object stage, so that the hydraulic part is used for controlling the movement of the drafting part to realize the lifting of the object stage.

3. The production line of claim 2, wherein: the hydraulic part comprises a pump body and a cylinder body connected with the output end of the pump body, a cavity is formed in the cylinder body and used for being connected with a cylinder rod, and the output end of the pump body is also connected with a handle through a connecting rod part.

4. The production line of claim 1, wherein: the outer circle machining mechanism comprises a first clamping part, a first cutting part and a first pressing part, wherein the first clamping part, the first cutting part and the first pressing part are arranged on the outer circle machining mechanism respectively

The first clamping part comprises a first main shaft and a chassis connected with the first main shaft, and the chassis is connected with the shifting block through a first spigot seat;

the first cutting part comprises a power head and a turning tool connected with the power head;

the first pressing portion comprises a first tailstock and an apex connected with the first tailstock, and the outer side of the apex is connected with the pressing plate.

5. The production line of claim 1, wherein: the hole machining mechanism comprises a second clamping part, a second cutting part and a second pressing part, wherein the second clamping part, the second cutting part and the second pressing part are arranged on the same plane, and the second cutting part and the second pressing part are arranged on the same plane

The second clamping part comprises a carriage, the carriage is provided with a part of connecting installation seats, and at least two positioning pins are connected to the installation seats;

the second cutting portion comprises a second main shaft and a boring cutter connected with the second main shaft;

the second pressing part comprises a first air cylinder and a pressing plate connected with the output end of the first air cylinder.

6. The production line of claim 5, wherein: the hole machining mechanism further comprises a positioning portion, and the positioning portion comprises a second tailstock and a positioning mandrel connected with the second tailstock.

7. The production line of claim 1, wherein: the first detection mechanism comprises a base, the base is connected with the sliding table through a transmission mechanism, and the second spigot seat is fixedly connected with the sliding table; the base is further connected with a stand column, at least one connecting disc is sleeved on the stand column, and a pair of measuring heads is further arranged on the connecting disc.

8. The production line of claim 7, wherein: at least one buffer is also arranged on the base.

9. The production line of claim 7, wherein: the connecting disc is provided with an opening, and the opening enables the connecting disc to form a U-shaped structure.

10. The production line of claim 1, wherein: the second detection mechanism comprises a gas-electricity workstation, the gas-electricity workstation is electrically connected with a gas-electricity converter, the measuring mandrel is connected with the measuring seat, the measuring mandrel is provided with a gas injection hole, one part of the gas injection hole is connected with the gas-electricity workstation through a first gas pipe, and the gas injection hole is provided with the other part of the gas injection hole which is connected with the gas-electricity converter through a second gas pipe.