Synchronous processing method for a segmented exhaust pipe

Abstract

The present invention discloses a synchronous processing method for a segmented exhaust pipe. In order to realize a synchronous processing method for a segmented exhaust pipe and achieve the synchronous processing of the segmented exhaust pipe, a synchronous processing device is adopted, which includes three machine tools and a robot. At least one turntable and a matching tailstock are installed on each machine tool. There is a U-shaped fixture bridge plate between the turntable and the tailstock. A plurality of zero-point positioning mechanisms protruding from the bottom plate are provided on the bottom plate of the fixture bridge plate. It also includes a plate-shaped fixture body. A tensioning sleeve is provided on the bottom surface of the plate-shaped fixture body. A grasping module cooperating with the manipulator is provided on the plate-shaped fixture body. Clamping mechanisms are provided on the plate-shaped fixture body at different processing positions corresponding to the front exhaust pipe, the middle exhaust pipe, and the rear exhaust pipe. The synchronous processing of the segmented exhaust pipe is completed through four processes. The present invention solves the problems of multi-process separate processing of the segmented exhaust pipe, large occupation of equipment resources, and complicated product replacement, and enables the processing of different products to be switched with the least amount of equipment and in the shortest time.

Description

Technical Field

[0001] The present invention relates to the technical field of processing of automobile exhaust pipes, and particularly relates to a synchronous processing method for segmented exhaust pipes. Background Art

[0002] At present, the segmented exhaust pipes on the market usually have three segments: front, middle, and rear. Due to the large structural differences among the three segments of the exhaust pipes and the separate processing of each segment during processing, this processing method requires a large number of equipment, frequent switching between various products, and a long processing time. Moreover, because each segment forms a separate production line, the heights from the reference planes to the pipe openings of each segment are inconsistent after processing. During the assembly of the assembly, due to the different heights of each segment, it is easy to encounter difficulties or even impossible to assemble, and at the same time, it may cause damage to the assembled seals or parts.

[0003] The parts that need to be processed on the front exhaust pipe A include: front flange surface A1, front assembly pipe opening A2, front bolt mounting surface A3, outer end surface of the left mounting hole for the front EGR valve heat insulation cotton A4, outer end surface of the right mounting hole for the front EGR valve heat insulation cotton A5, outer end surface of the mounting hole for the front EGR valve A6, outer end surface of the mounting hole for the front intake pipe A7;

[0004] The parts that need to be processed on the middle exhaust pipe B include: middle flange surface B1, left middle assembly pipe opening B2, right middle assembly pipe opening B3, middle bolt mounting surface B4, middle exhaust pipe turbocharging mounting surface B5, middle exhaust pipe turbocharger bolt mounting surface B6;

[0005] The parts that need to be processed on the rear exhaust pipe C include: rear flange surface C1, rear assembly pipe opening C2, rear bolt mounting surface C3, outer end surface of the assembly hole for the rear exhaust pipe temperature sensor C4.

[0006] Due to the different structures of each segment of the exhaust pipe, the robotic mechanical claws cannot be shared when processing at various spatial angles. To meet the synchronous processing requirements, it is necessary to frequently replace the mechanical claws, one mechanical claw for each structure, to grasp parts with different structures to meet the processing needs, resulting in a large investment in equipment, high investment, and high processing costs. Summary of the Invention

[0007] In order to solve the above problems, the present invention proposes a synchronous processing method for segmented exhaust pipes.

[0008] For this reason, the technical solution of the present invention is a synchronous processing method for segmented exhaust pipes, characterized in that:

[0009] (1) In order to achieve the synchronous processing of segmented exhaust pipes, a synchronous processing device is adopted, and the specific structure is as follows: it includes three machine tools and one robot. Two of the three machine tools are located on both sides of the robot, and another machine tool is located directly in front of the robot. A workbench is provided behind the robot. The three machine tools and the robot are connected to a control system and cooperate with each other through the scheduling of the control system for operation;

[0010] At least one set of turntable and a matching tailstock are installed on each machine tool. There is a U-shaped fixture bridge plate between the turntable and the tailstock. The two side plates of the U-shaped fixture bridge plate are respectively fixed on the rotating shafts of the turntable and the tailstock. A plurality of zero-point positioning mechanisms protruding from the bottom plate are provided on the bottom plate of the fixture bridge plate, and a tensioning head is provided on the zero-point positioning mechanism.

[0011] It also includes a plate-shaped fixture body that cooperates with the U-shaped fixture bridge plate. A tensioning sleeve that cooperates with the tensioning heads of a plurality of zero-point positioning mechanisms is provided on the bottom surface of the plate-shaped fixture body. A grasping module that cooperates with the manipulator is provided on the end surface of the plate-shaped fixture body facing the robot side. Corresponding clamping mechanisms are provided on the plate-shaped fixture body at different processing positions of the front exhaust pipe, the middle exhaust pipe, and the rear exhaust pipe. All clamping mechanisms include clamping and limiting parts, positioning pins, and auxiliary support parts in the front-rear, left-right, and vertical directions, and do not interfere with the corresponding processing parts.

[0012] The clamping mechanism specifically includes a first-order clamping mechanism, a second-order clamping mechanism, a third-order clamping mechanism, and a fourth-order clamping mechanism, where:

[0013] The first-order clamping mechanism is three sets of corresponding clamping mechanisms arranged side by side for machining the front flange surface of the front exhaust pipe, the middle flange surface of the middle exhaust pipe, and the rear flange surface of the rear exhaust pipe. After clamping, the central axes of the main pipes of the front exhaust pipe, the middle exhaust pipe, and the rear exhaust pipe are located in the same height plane, and the front flange surface, the middle flange surface, and the rear flange surface are located in the same height plane after machining.

[0014] The second-order clamping mechanism is three sets of corresponding clamping mechanisms arranged for machining the front assembly pipe orifice and the front bolt mounting surface of the front exhaust pipe, the left middle assembly pipe orifice, the right middle assembly pipe orifice, and the middle bolt mounting surface of the middle exhaust pipe, and the rear assembly pipe orifice and the rear bolt mounting surface of the rear exhaust pipe. The second-order clamping mechanism has a flange surface positioning reference surface at the same height. After clamping, the corresponding flange surfaces of the front exhaust pipe, the middle exhaust pipe, and the rear exhaust pipe are located in the same height plane.

[0015] The third-order clamping mechanism is three sets of corresponding clamping mechanisms arranged for machining the outer end surfaces of the left and right mounting holes of the front EGR valve heat insulation cotton of the front exhaust pipe, the turbocharging mounting surface of the middle exhaust pipe, and the outer end surface of the rear exhaust pipe temperature sensor assembly hole of the rear exhaust pipe. The third-order clamping mechanism has a flange surface positioning reference surface at the same height. After switching and clamping, the corresponding flange surfaces of the front exhaust pipe, the middle exhaust pipe, and the rear exhaust pipe are located in the same height plane.

[0016] The four-sequence clamping mechanism is composed of two corresponding clamping mechanisms arranged according to the outer end faces of the front-row EGR valve mounting holes and the outer end faces of the front-row intake pipe mounting holes of the front exhaust pipe during processing, and the bolt mounting surface of the turbocharger of the middle exhaust pipe. The four-sequence clamping mechanism has flange surface positioning reference planes at the same height. After switching the clamping, the corresponding flange surfaces of the front exhaust pipe and the middle exhaust pipe are located on the same height plane;

[0017] Among them, two sets of first-sequence clamping mechanisms use Machine Tool 1 simultaneously, two sets of second-sequence clamping mechanisms use Machine Tool 2 simultaneously, and one set of third-sequence clamping mechanism and one set of fourth-sequence clamping mechanism share Machine Tool 3 and are used alternately;

[0018] The clamping and positioning of the clamping mechanism are both hydraulically driven and equipped with a pressure-holding system, which is connected to the control system;

[0019] (2) Using the synchronous processing device described in (1), the method for realizing the synchronous processing of the segmented exhaust pipe is as follows:

[0020] ① First sequence: First, place the flange surfaces of the two sets of front exhaust pipes, middle exhaust pipes, and rear exhaust pipes to be processed facing up on the two sets of first-sequence clamping mechanisms, clamp them, hold the pressure, place them on the workbench, and convey them to the predetermined position through the conveyor belt. The robot uses the manipulator to grab the first-sequence clamping mechanisms respectively and place them on the bottom plate of the U-shaped fixture bridge of the predetermined Machine Tool 1, connect the oil circuit, and fix them through the zero-point positioning mechanism, and start the first-sequence processing; after the processing is completed, take out the first-sequence clamping mechanism, release the pressure, take out the exhaust pipes after the first-sequence processing, and continue the next set of first-sequence operations;

[0021] ② Second sequence: Clamp and fix the exhaust pipes processed in ① on the second-sequence clamping mechanism according to the processing surface, hold the pressure, place them on the workbench, place the second-sequence clamping mechanism on the bottom plate of the U-shaped fixture bridge of Machine Tool 2 through the robot, connect the oil circuit, and fix them through the zero-point positioning mechanism, and start the second-sequence processing; after the second-sequence processing is completed, take out the second-sequence clamping mechanism, release the pressure, and remove the processed exhaust pipes, and continue the next set of second-sequence operations;

[0022] ③ Third sequence: Fix and hold the pressure of the exhaust pipes processed in ② on the third-sequence clamping mechanism according to the processing surface, place them on the bottom plate of the U-shaped fixture bridge of Machine Tool 3, fix them, connect the oil circuit, and fix them through the zero-point positioning mechanism, and start the third-sequence processing; after the third-sequence processing is completed, take out the third-sequence clamping mechanism, release the pressure, and remove the processed exhaust pipes. The rear exhaust pipe is completed and reserved;

[0023] ④Fourth process: Clamp and fix the front exhaust pipe and the middle exhaust pipe processed in ③ on the fourth-process clamping mechanism according to the processed surface, maintain pressure, place them on the bottom plate of the U-shaped fixture bridge plate of Machine Tool 3, fix them, connect the oil circuit, fix them through the zero-point positioning mechanism, and start the fourth-process machining; after the fourth-process machining is completed, take out the fourth-process clamping mechanism, relieve pressure, and remove it to complete the machining of the front exhaust pipe and the middle exhaust pipe, and set aside for later use; continue the third-process machining, and the third process and the fourth process are alternately machined on Machine Tool 3.

[0024] Preferably, an oil circuit channel is preset in the plate-shaped fixture body. An oil pipe channel oil inlet and an oil return port are provided on the plate-shaped fixture body. The oil inlet is provided with an oil pipe joint and an oil delivery pipeline for connecting to a hydraulic station. Each hydraulic drive mechanism is provided with an oil circuit connection part communicated with the oil circuit channel. All hydraulic drives are adopted to avoid manual operation, reduce labor intensity, and improve efficiency; the oil circuit is arranged in the plate-shaped fixture body to ensure the cleanliness of the equipment and avoid interference.

[0025] Preferably, the zero-point positioning mechanisms on the bottom plate of the fixture bridge are located at the four vertices of a rectangle. Zero-point support blocks are provided on the diagonal of the rectangle. An oil circuit channel is preset in the bottom plate. An oil pipe channel oil inlet and an oil return port are provided on the bottom plate. The oil inlet is provided with an oil pipe joint and an oil delivery pipeline for connecting to a hydraulic station. The zero-point positioning mechanisms are provided with oil circuit connection parts communicated with the oil circuit channel and are connected to the control system. This setting ensures stability. At the same time, the oil circuit is arranged in the bottom plate to ensure the cleanliness of the equipment and avoid interference.

[0026] Preferably, the specific structure of the grasping module cooperating with the manipulator is that two zero-point positioning mechanisms are arranged side by side on the grasping module, and the zero-point positioning mechanisms are provided with expansion heads. The front end of the manipulator is provided with a cooperating expansion sleeve. The zero-point positioning mechanisms are communicated with the oil circuit in the plate-shaped fixture body and are controlled by the control system. The actions of grasping and disengaging by using the zero-point positioning mechanism are easy to control and convenient to use.

[0027] Preferably, pressure gauges communicated with the oil circuit channel are further provided on the side walls of the plate-shaped fixture body and the bottom plate, which is convenient for observing on-site whether the clamping state of the workpiece meets the machining conditions.

[0028] Beneficial effects: The present invention can solve the problems of multi-process machining of segmented exhaust pipes separately, large occupation of equipment resources, and complicated product replacement. By placing similar processes of each section of the exhaust pipe on the same set of tooling, the process flow is shortened, the use of equipment is reduced, and the machining efficiency is improved, realizing machining different products with the least equipment and the fastest time switching. At the same time, the existing way of the mechanical claw grasping parts is changed to grasping the tooling; the zero-point quick-change system is adopted to ensure the consistency of the tooling position. The mechanical claw has a simple structure, can realize rapid replacement of the fixture, and does not require the design of a complicated mechanical claw. Description of the Drawings

[0029] Figure 1 It is a three-dimensional view of the exhaust pipe of the present invention from different angles.

[0030] Figure 2 It is a three-dimensional view of the front exhaust pipe of the present invention from different angles.

[0031] Figure 3 It is a three-dimensional view of the middle exhaust pipe of the present invention from different angles.

[0032] Figure 4 It is a three-dimensional view of the rear exhaust pipe of the present invention from different angles.

[0033] Figure 5 It is a layout diagram of the present invention.

[0034] Figure 6 It is a layout diagram of the zero-point positioning mechanism on the bottom plate of the present invention.

[0035] Figure 7 It is Figure 6 The structural diagram of the plate-shaped fixture body that cooperates with.

[0036] Figure 8 It is a schematic diagram of the first-stage clamping mechanism of the present invention on the machine tool.

[0037] Figure 9 It is Figure 8 The usage state diagram of.

[0038] Figure 10 It is a schematic diagram of the second-stage clamping mechanism of the present invention on the machine tool.

[0039] Figure 11 It is Figure 10 The usage state diagram of.

[0040] Figure 12 It is a schematic diagram of the third-stage clamping mechanism of the present invention on the machine tool. [[ID=5,2]]

[0041] Figure 13 It is Figure 12 The usage state diagram of.

[0042] Figure 14 It is a schematic diagram of the fourth-stage clamping mechanism of the present invention on the machine tool.

[0043] Figure 15 It is Figure 14 The usage state diagram of.

[0044] As shown in the figure: 1. Turntable; 2. Tailstock; 3. U-shaped fixture plate bridge; 4. Zero-point positioning mechanism; 5. Plate-shaped fixture body; 6. Gripping module;

[0045] A, front exhaust pipe; B, middle exhaust pipe; C, rear exhaust pipe; D, clamping mechanism; M, machine tool; N, robot; P, workbench. Specific embodiments

[0046] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings, but this embodiment should not be construed as a limitation to the present invention.

[0047] As shown in the present invention Figures 1 to 15 shown:

[0048] A synchronous processing method for a segmented exhaust pipe,

[0049] (1) In order to realize the synchronous processing of the segmented exhaust pipe, a synchronous processing device is adopted, and the specific structure is: including three machine tools M and one robot N. Two of the three machine tools are located on both sides of the robot (the second machine tool M2 is on the left and the third machine tool M3 is on the right), the second machine tool is in front of the robot, and a workbench P is provided behind the robot. The three machine tools and the robot are connected to the control system and cooperate with each other through the scheduling of the control system;

[0050] At least one set of turntable 1 and a matching tailstock 2 are installed on each machine tool M. There is a U-shaped fixture plate bridge 3 between the turntable and the tailstock. The two side plates 31 of the U-shaped fixture plate bridge are respectively fixed on the rotating shafts of the turntable and the tailstock. There are multiple zero-point positioning mechanisms 4 protruding from the bottom plate on the bottom plate 32 of the fixture plate bridge, and a tensioning head is provided on the zero-point positioning mechanism.

[0051] It also includes a plate-shaped fixture body 5 that cooperates with the U-shaped fixture plate bridge. A tensioning sleeve 51 that cooperates with the tensioning heads of multiple zero-point positioning mechanisms is provided on the bottom surface of the plate-shaped fixture body. A grasping module 6 that cooperates with the manipulator is provided on the end face of the plate-shaped fixture body facing the robot. Corresponding clamping mechanisms D are provided on the plate-shaped fixture body at different processing positions of the front exhaust pipe A, the middle exhaust pipe B, and the rear exhaust pipe C. All clamping mechanisms include clamping and limiting parts, positioning pins, and auxiliary support parts in the front-rear, left-right, and vertical directions, and do not interfere with the corresponding processing parts;

[0052] The clamping mechanism specifically includes a first-order clamping mechanism D1, a second-order clamping mechanism D2, a third-order clamping mechanism D3, and a fourth-order clamping mechanism D4, where:

[0053] The first-order clamping mechanism D1 is three sets of corresponding clamping mechanisms arranged side by side with the front flange surface A1 of the front exhaust pipe, the middle flange surface B1 of the middle exhaust pipe, and the rear flange surface C1 of the rear exhaust pipe. After clamping, the central axes of the main pipes of the front exhaust pipe A, the middle exhaust pipe B, and the rear exhaust pipe C are located in the same height plane, and the front flange surface A1, the middle flange surface B1, and the rear flange surface C1 are located in the same height plane after processing; As Figure 8 andFigure 9 As shown (clamping and limiting are carried out in a conventional manner according to the placement positions, and the corresponding components are listed without limiting the number, and no specific markings are made in the figure): for the front exhaust pipe, V-shaped and flat positioning blocks, pressing cylinders, linear cylinders, spring auxiliary supports, auxiliary support cylinders, etc. are used for clamping and limiting; for the middle exhaust pipe, V-shaped positioning blocks, pressing cylinders, linear cylinders, and auxiliary support cylinders are used for clamping and limiting; for the rear exhaust pipe, V-shaped and flat positioning blocks, pressing cylinders, linear cylinders, and auxiliary support cylinders are used for clamping and limiting; the first-stage clamping mechanism does not need to rotate, and a turntable can be not set on the machine tool;

[0054] The second-stage clamping mechanism D2 is three sets of corresponding clamping mechanisms arranged by machining the front assembly pipe orifice A2 and front bolt mounting surface A3 of the front exhaust pipe, the middle left assembly pipe orifice B2, middle right assembly pipe orifice B3, and middle bolt mounting surface B4 of the middle exhaust pipe, and the rear assembly pipe orifice C2 and rear bolt mounting surface C3 of the rear exhaust pipe. The second-stage clamping mechanism has a flange surface positioning reference surface at the same height. After clamping, the corresponding front flange surface A1, middle flange surface B1, and rear flange surface C1 of the front exhaust pipe, middle exhaust pipe, and rear exhaust pipe are located on the same height plane, so as to ensure that the heights of the orifices and flange surfaces of the front exhaust pipe, middle exhaust pipe, and rear exhaust pipe during machining are the same; As Figure 10 and Figure 11 As shown (clamping and limiting are carried out in a conventional manner according to the placement positions, and the corresponding components are listed without limiting the number, and no specific markings are made in the figure): for the front exhaust pipe, pressing cylinders, positioning pins, and positioning planes are used for clamping and limiting; for the middle exhaust pipe, pressing cylinders, auxiliary support cylinders, positioning pins, and positioning planes are used for clamping and limiting; for the rear exhaust pipe, pressing cylinders, positioning pins, and positioning planes are used for clamping and limiting;

[0055] The third-stage clamping mechanism D3 is three sets of corresponding clamping mechanisms arranged by machining the outer end surface A4 of the left mounting hole of the front EGR valve heat insulation cotton and the outer end surface A5 of the right mounting hole of the front EGR valve heat insulation cotton of the front exhaust pipe, the turbocharging mounting surface B5 of the middle exhaust pipe, and the outer end surface C4 of the rear exhaust pipe temperature sensor assembly hole of the rear exhaust pipe. The third-stage clamping mechanism has a flange surface positioning reference surface at the same height. After switching and clamping, the corresponding front flange surface A1, middle flange surface B1, and rear flange surface C1 of the front exhaust pipe, middle exhaust pipe, and rear exhaust pipe are located on the same height plane; As Figure 12 and Figure 13 As shown (clamping and limiting are carried out in a conventional manner according to the placement positions, and the corresponding components are listed without limiting the number, and no specific markings are made in the figure): for the front exhaust pipe, linear cylinders, auxiliary support cylinders, pressing cylinders, positioning pins, and positioning planes are used for clamping and limiting; for the middle exhaust pipe, pressing cylinders, auxiliary support cylinders, positioning pins, and positioning planes are used for clamping and limiting; for the rear exhaust pipe, pressing cylinders, positioning pins, and positioning planes are used for clamping and limiting;

[0056] The four-sequence clamping mechanism D4 is composed of two sets of corresponding clamping mechanisms arranged according to the outer end face A6 of the front-row EGR valve mounting hole for machining the front exhaust pipe, the outer end face A7 of the front intake pipe mounting hole, and the turbine supercharger bolt mounting surface B6 of the middle exhaust pipe. The four-sequence clamping mechanism has a flange surface positioning reference plane at the same height. After switching the clamping, the corresponding front flange surface A1 of the front exhaust pipe and the middle flange surface B1 of the middle exhaust pipe are located on the same height plane; as Figure 14 and Figure 15 shown in (both are clamped and limited in a conventional manner according to the placed positions, listing the corresponding components without limiting the number, and not specifically marked in the figure): For the front exhaust pipe, a pressing cylinder, an auxiliary support cylinder, a positioning pin, and a positioning plane are used for clamping and limiting; for the middle exhaust pipe, a pressing cylinder, a positioning pin, and a positioning plane are used for clamping and limiting;

[0057] Among them, two sets of first-sequence clamping mechanisms D1 are used simultaneously with machine tool one M1, two sets of second-sequence clamping mechanisms D2 are used simultaneously with machine tool two M2, one set of third-sequence clamping mechanism D3 and one set of fourth-sequence clamping mechanism D4 share machine tool three M3 and are used alternately to improve the utilization rate of the equipment;

[0058] The clamping and positioning of the clamping mechanism D are all driven by hydraulic pressure and equipped with a pressure-holding system, which is connected to the control system;

[0059] (2) Using the synchronous machining device described in (1), the method for realizing the synchronous machining of the segmented exhaust pipe is as follows:

[0060] ① First sequence: First, place the flange surfaces of two sets of front exhaust pipes A, middle exhaust pipes B, and rear exhaust pipes C to be machined upward on two sets of first-sequence clamping mechanisms D1, clamp and hold the pressure, place them on the workbench P, and convey them to the predetermined position through the conveyor belt. The robot N grabs the first-sequence clamping mechanisms through the manipulator and places them on the bottom plate 32 of the U-shaped fixture bridge plate 3 of the predetermined machine tool one M1, connects the oil circuit, and fixes them through the zero-point positioning mechanism 4 to start the first-sequence machining; after the machining is completed, take out the first-sequence clamping mechanism, release the pressure, take out the exhaust pipe after the first-sequence machining, and continue the next set of first-sequence operations;

[0061] ② Second sequence: Clamp and fix the exhaust pipes processed in ① on the second-sequence clamping mechanism D2 according to the machining surface, hold the pressure, place them on the workbench, place the second-sequence clamping mechanism on the bottom plate 32 of the U-shaped fixture bridge plate 3 of the machine tool two M2 through the robot N, connect the oil circuit, and fix them through the zero-point positioning mechanism to start the second-sequence machining; after the second-sequence machining is completed, take out the second-sequence clamping mechanism, release the pressure, and remove the processed exhaust pipes, and continue the next set of second-sequence operations;

[0062] ③Third sequence: Install each processed exhaust pipe in ② on the clamping mechanism D3 of the third sequence according to the processing surface, fix and maintain pressure, place it on the bottom plate 32 of the U-shaped fixture plate bridge 3 of the machine tool M3, fix it, connect the oil circuit, fix it through the zero-point positioning mechanism 4, and start the third-sequence processing; after the third-sequence processing is completed, remove the clamping mechanism of the third sequence, relieve the pressure, and remove the processed exhaust pipes. The rear exhaust pipe C is completed and reserved for use;

[0063] ④Fourth sequence: Install the front exhaust pipe A and the middle exhaust pipe B processed in ③ on the clamping mechanism D4 of the fourth sequence according to the processing surface, clamp and fix, maintain pressure, and place it on the bottom plate 32 of the U-shaped fixture plate bridge 3 of the machine tool M3, fix it, connect the oil circuit, fix it through the zero-point positioning mechanism 4, and start the fourth-sequence processing; after the fourth-sequence processing is completed, remove the clamping mechanism of the fourth sequence, relieve the pressure, and remove it to complete the processing of the front exhaust pipe and the middle exhaust pipe, and reserve for use; continue the processing of the third sequence, and the third sequence and the fourth sequence are processed alternately on the machine tool M3.

[0064] An oil circuit channel is preset in the plate-shaped fixture body 5. An oil pipe channel oil inlet and an oil return port are provided on the plate-shaped fixture body. The oil inlet is provided with an oil pipe joint and an oil transmission pipeline for connecting a hydraulic station. Each hydraulic driving mechanism is provided with an oil circuit connection part communicated with the oil circuit channel. All hydraulic drives are adopted to avoid manual operation, reduce labor intensity, and improve efficiency; the oil circuit is arranged in the plate-shaped fixture body to ensure the cleanliness of the equipment and avoid interference.

[0065] The zero-point positioning mechanism 4 on the bottom plate 32 of the fixture plate bridge is located at the four vertices of a rectangle. Zero-point support blocks are provided on the diagonal of the rectangle. An oil circuit channel is preset in the bottom plate. An oil pipe channel oil inlet and an oil return port are provided on the bottom plate. The oil inlet is provided with an oil pipe joint and an oil transmission pipeline for connecting a hydraulic station. The zero-point positioning mechanism is provided with an oil circuit connection part communicated with the oil circuit channel and is connected to the control system. This setting ensures stability. At the same time, the oil circuit is arranged in the bottom plate to ensure the cleanliness of the equipment and avoid interference.

[0066] The specific structure of the grasping module 6 cooperating with the manipulator is that two zero-point positioning mechanisms are arranged side by side on the grasping module, and the zero-point positioning mechanism has a tensioning head. A matching tensioning sleeve is provided at the front end of the manipulator. The zero-point positioning mechanism is communicated with the oil circuit in the plate-shaped fixture body and is controlled by the control system. The actions of grasping and disengaging with the zero-point positioning mechanism are easy to control and convenient and fast to use.

[0067] Pressure gauges (conventional technology, not shown in the figure) communicated with the oil circuit channel are also provided on the side walls of the plate-shaped fixture body 5 and the bottom plate 32, which is convenient for on-site observation of whether the clamping state of the workpiece meets the processing conditions.

[0068] Matters not described in detail in this specification are well-known technologies in the art.

[0069] Through the above description, those skilled in the art should understand that the present invention is not limited to the above specific embodiments. Improvements and substitutions using well-known techniques in the art based on the present invention fall within the protection scope of the present invention, which should be defined by each claim.

Claims

1. A synchronous processing method for a segmented exhaust pipe, characterized in that: (1) To achieve the synchronous processing of the segmented exhaust pipe, a synchronous processing device is adopted, and the specific structure is as follows: It includes three machine tools and a robot. Two of the three machine tools are located on both sides of the robot, and another machine tool is located directly in front of the robot. There is a workbench behind the robot. The three machine tools and the robot are connected to the control system and cooperate with each other through the scheduling of the control system; At least one turntable and a matching tailstock are installed on each machine tool. There is a U-shaped fixture bridge plate between the turntable and the tailstock. The two side plates of the U-shaped fixture bridge plate are respectively fixed on the rotating shafts of the turntable and the tailstock. There are multiple zero-point positioning mechanisms protruding from the bottom plate of the fixture bridge plate, and a tensioning head is provided on the zero-point positioning mechanism; It also includes a plate-shaped fixture body that cooperates with the U-shaped fixture bridge plate. On the bottom surface of the plate-shaped fixture body, there are tensioning sleeves that are connected to the tensioning heads of multiple zero-point positioning mechanisms in a matching manner. On the end surface of the plate-shaped fixture body facing the robot, there is a grasping module that cooperates with the manipulator. On the plate-shaped fixture body, there are corresponding clamping mechanisms arranged according to different processing positions of the front exhaust pipe, the middle exhaust pipe, and the rear exhaust pipe. All clamping mechanisms include clamping and limiting parts, positioning pins, and auxiliary support parts in the front-rear, left-right, and vertical directions, and do not interfere with the corresponding processing parts; The clamping mechanism specifically includes a first-order clamping mechanism, a second-order clamping mechanism, a third-order clamping mechanism, and a fourth-order clamping mechanism, where: The first-order clamping mechanism is three sets of corresponding clamping mechanisms arranged side by side for processing the front flange surface of the front exhaust pipe, the middle flange surface of the middle exhaust pipe, and the rear flange surface of the rear exhaust pipe. After clamping, the central axes of the main pipes of the front exhaust pipe, the middle exhaust pipe, and the rear exhaust pipe are located on the same height plane, and the front flange surface, the middle flange surface, and the rear flange surface are located on the same height plane after processing; The second-order clamping mechanism is three sets of corresponding clamping mechanisms arranged for processing the front assembly pipe orifice and the front bolt installation surface of the front exhaust pipe, the left and right middle assembly pipe orifices and the middle bolt installation surface of the middle exhaust pipe, and the rear assembly pipe orifice and the rear bolt installation surface of the rear exhaust pipe. The second-order clamping mechanism has a flange surface positioning reference plane at the same height. After clamping, the corresponding flange surfaces of the front exhaust pipe, the middle exhaust pipe, and the rear exhaust pipe are located on the same height plane; The third-order clamping mechanism is three sets of corresponding clamping mechanisms arranged for processing the outer end surfaces of the left and right front EGR valve heat insulation cotton installation holes of the front exhaust pipe, the turbocharging installation surface of the middle exhaust pipe, and the outer end surface of the rear exhaust pipe temperature sensor assembly hole of the rear exhaust pipe. The third-order clamping mechanism has a flange surface positioning reference plane at the same height. After switching clamping, the corresponding flange surfaces of the front exhaust pipe, the middle exhaust pipe, and the rear exhaust pipe are located on the same height plane; The four - sequence clamping mechanism is composed of two sets of corresponding clamping mechanisms arranged according to the outer end faces of the front - row EGR valve mounting holes and the outer end faces of the front - row intake pipe mounting holes of the front - row exhaust pipe, and the bolt mounting surface of the turbocharger of the middle exhaust pipe. The four - sequence clamping mechanism has flange - surface positioning reference planes at the same height. After switching the clamping, the corresponding flange surfaces of the front - row exhaust pipe and the middle exhaust pipe are located on the same horizontal plane; Among them, two sets of first - sequence clamping mechanisms use machine tool one simultaneously, two sets of second - sequence clamping mechanisms use machine tool two simultaneously, one set of third - sequence clamping mechanism and one set of fourth - sequence clamping mechanism share machine tool three and are used alternately; The clamping and positioning of the clamping mechanism are both hydraulically driven, equipped with a pressure - maintaining system, and connected to the control system; (2)Using the synchronous machining device described in (1), the method for realizing the synchronous machining of the segmented exhaust pipe is as follows: ① First sequence: First, place the flange surfaces of the two sets of front - row exhaust pipes, middle exhaust pipes, and rear - row exhaust pipes to be machined facing upwards on the two sets of first - sequence clamping mechanisms, clamp them, maintain pressure, place them on the workbench, and transfer them to the predetermined position through the conveyor belt. The robot uses the manipulator to grab the first - sequence clamping mechanisms respectively and place them on the bottom plate of the U - shaped fixture bridge of the predetermined machine tool one, connect the oil circuit, fix them through the zero - point positioning mechanism, and start the first - sequence machining; After the machining is completed, take out the first - sequence clamping mechanism, relieve the pressure, take out the exhaust pipes that have completed the first - sequence machining, and continue the next set of first - sequence operations; ② Second sequence: Install the exhaust pipes processed in ① on the second - sequence clamping mechanism according to the machining surface, clamp and fix them, maintain pressure, place them on the workbench, and place the second - sequence clamping mechanism on the bottom plate of the U - shaped fixture bridge of machine tool two through the robot, connect the oil circuit, fix them through the zero - point positioning mechanism, and start the second - sequence machining; After the second - sequence machining is completed, take out the second - sequence clamping mechanism, relieve the pressure, and remove the processed exhaust pipes, and continue the next set of second - sequence operations; ③ Third sequence: Install the exhaust pipes processed in ② on the third - sequence clamping mechanism according to the machining surface, fix and maintain pressure, place them on the bottom plate of the U - shaped fixture bridge of machine tool three, fix them, connect the oil circuit, fix them through the zero - point positioning mechanism, and start the third - sequence machining; After the third - sequence machining is completed, take out the third - sequence clamping mechanism, relieve the pressure, and remove the processed exhaust pipes. The rear - row exhaust pipe is completed and reserved; ④ Fourth sequence: Install the front - row exhaust pipe and the middle exhaust pipe processed in ③ on the fourth - sequence clamping mechanism according to the machining surface, clamp and fix them, maintain pressure, and place them on the bottom plate of the U - shaped fixture bridge of machine tool three, fix them, connect the oil circuit, fix them through the zero - point positioning mechanism, and start the fourth - sequence machining; After the fourth - sequence machining is completed, take out the fourth - sequence clamping mechanism, relieve the pressure, remove it, complete the machining of the front - row exhaust pipe and the middle exhaust pipe, and reserve them; Continue the machining of the third sequence. The third sequence and the fourth sequence are alternately machined on machine tool three.

2. The synchronous processing method of a segmented exhaust pipe according to claim 1, characterized in that: The plate - shaped fixture body is preset with an oil - circuit channel. The plate - shaped fixture body is provided with an oil - pipe channel oil inlet and an oil return port. The oil inlet is provided with an oil - pipe joint and an oil - transmission pipeline for connecting the hydraulic station. Each hydraulic drive mechanism is provided with an oil - circuit connection part communicating with the oil - circuit channel.

3. The synchronous processing method of a segmented exhaust pipe according to claim 1 or 2, characterized in that: The zero-point positioning mechanism on the bottom plate of the fixture bridge plate is located at the four vertices of a rectangle. Zero-point support blocks are provided on the diagonal of the rectangle. An oil passage is preset in the bottom plate, and an oil pipe passage inlet and an oil return port are provided on the bottom plate. The inlet is provided with an oil pipe joint and an oil delivery pipeline for connecting to a hydraulic station. The zero-point positioning mechanism is provided with an oil passage connection part communicating with the oil passage and is connected to a control system.

4. The synchronous processing method of a segmented exhaust pipe according to claim 3, characterized in that: The specific structure of the grasping module cooperating with the manipulator is that two zero-point positioning mechanisms are arranged side by side on the grasping module, and the zero-point positioning mechanism has a tensioning head. A cooperating tensioning sleeve is provided at the front end of the manipulator. The zero-point positioning mechanism communicates with the oil passage in the plate-shaped fixture body and is controlled by the control system.

5. The synchronous processing method of a segmented exhaust pipe according to claim 1 or 2 or 4, characterized in that: A pressure gauge communicating with the oil passage is further provided on the side walls of the plate-shaped fixture body and the bottom plate.

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