Full-automatic machining process for engine bearing cover

Abstract

This invention provides an automated machining process for engine bearing caps, relating to the field of automotive parts processing. It includes six steps: loading and unloading, milling flat surfaces, deburring, drilling cylindrical pin holes, enlarging stepped holes, reaming cylindrical pin holes, assembling cylindrical pins, and detecting the cylindrical pin spacing. When machining the bearing cap using this invention, a loading and unloading robot automatically picks up the workpiece and places it into a fixture. The fixture then moves the workpiece between various workstations, sequentially completing machining, assembly, and inspection before returning to the loading and unloading station. Finally, the loading and unloading robot places qualified workpieces into a finished product tray and unqualified workpieces into a scrap bin, thus completing the automated machining of the bearing cap.

Description

Technical Field

[0001] This invention relates to the field of engine bearing cover processing technology, and specifically to a fully automated processing technology for engine bearing covers. Background Technology

[0002] As a crucial component of automotive engines, bearing caps primarily support the movement of the crankshaft. Because bearing caps have bolt holes and locating pins for connection to the engine cylinder head, traditional bearing cap manufacturing processes require multiple steps. This means that multiple machines are needed on the bearing cap manufacturing production line. Furthermore, since machining centers use cutting fluid, additional cleaning tanks are required to clean the surface to meet cleanliness requirements and complete the bearing cap manufacturing process.

[0003] like Figure 1 The bearing cap shown requires milling plane A, drilling cylindrical pin holes, reaming cylindrical pin holes, expanding stepped holes, and assembling cylindrical pins to complete the processing from blank to finished product. Therefore, the existing bearing cap processing technology generally requires the use of multiple standard machining centers to form a processing line for the production of bearing caps.

[0004] However, in the actual production process of bearing caps, the following defects were found in the existing bearing cap processing production line and processing technology: 1. Since all the equipment is set up independently, it has defects such as a large number of equipment, a large number of workpiece turnovers, a large number of workpiece repositionings, and low work efficiency; 2. Due to the lack of product testing equipment, it is impossible to directly test the assembled finished products. Therefore, it cannot achieve automatic sorting of finished products and affects the production rhythm of the entire production process. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a fully automated processing technology for engine bearing covers that can reduce the number of equipment and manual intervention, while increasing production cycle time and improving product processing accuracy.

[0006] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: a fully automated processing technology for engine bearing caps, which includes the following steps:

[0007] SO1, Loading: Using loading and unloading robots to put unprocessed workpieces into the fixtures located at the loading and unloading station;

[0008] S02. Milling plane A and deburring: First, move the fixture with the workpiece on it from the loading and unloading station to the milling plane station. Then, use a disc milling cutter to mill plane A and use a brush to clean the burrs around plane A.

[0009] S03. Drilling cylindrical pin holes and enlarging stepped holes: First, move the fixture with the workpiece on it from the milling station to the drilling station, and then use the drill bit to machine cylindrical pin holes and stepped holes on the surface of the workpiece.

[0010] S04. Reaming the cylindrical pin hole: First, move the fixture holding the workpiece from the drilling station to the reaming station, and then ream the cylindrical pin hole.

[0011] S05. To assemble the cylindrical pins, first move the fixture holding the workpiece from the reaming station to the assembly station, and then insert cylindrical pin one and cylindrical pin two into the corresponding cylindrical pin holes on the workpiece.

[0012] S06. To detect the spacing between cylindrical pins, first move the fixture with the workpiece on it from the assembly station to the detection station. Then, use an optical measuring device to take a picture of the surface of the workpiece with cylindrical pin 1 and cylindrical pin 2. Calculate the position of cylindrical pin 1 and cylindrical pin 2 based on the grayscale characteristics of the captured image. Determine whether the spacing between cylindrical pin 1 and cylindrical pin 2 meets the processing requirements based on the position of cylindrical pin 1 and cylindrical pin 2.

[0013] S07. Unloading: First, move the fixture holding the workpiece from the inspection station to the loading / unloading station. Then, use the loading / unloading robot to remove the finished workpiece from the fixture at the loading / unloading station. Based on the inspection results of S06, put the workpiece into the scrap bin or finished product tray.

[0014] On the one hand, this invention integrates the loading and unloading stations, which reduces the number of devices, the floor space required for the corresponding processing line, and the number of times workpieces are transferred across areas, thereby centralizing the bearing cover processing steps. On the other hand, because this invention has a detection station behind the assembly station, it can determine the position of the assembled cylindrical pins one and two after the bearing cover and cylindrical pins are assembled, thereby achieving automatic sorting of finished products and ensuring that the final discharged finished products meet the processing requirements.

[0015] Furthermore, step S06 specifically includes the following steps:

[0016] S060. Define the direction from the center of cylindrical pin one to the center of cylindrical pin two as the X direction, and measure the coordinates A1, B1, C1, and D1 of cylindrical pin one installed on the workpiece in the X direction, and measure the coordinates A2, B2, C2, and D2 of cylindrical pin two installed on the workpiece in the X direction; where A1 is the minimum coordinate value in the X direction of the end of cylindrical pin one located outside the workpiece, B1 is the minimum coordinate value in the X direction of the part of cylindrical pin one flush with the end face of the workpiece, C1 is... The maximum coordinate value in the X direction of the end of cylindrical pin one located outside the workpiece is D1, which is the maximum coordinate value in the X direction of the end of cylindrical pin one that is flush with the end face of the workpiece; A2 is the maximum coordinate value in the X direction of the end of cylindrical pin two located outside the workpiece; B2 is the maximum coordinate value in the X direction of the end of cylindrical pin two that is flush with the end face of the workpiece; C2 is the minimum coordinate value in the X direction of the end of cylindrical pin two located outside the workpiece; and D2 is the minimum coordinate value in the X direction of the end of cylindrical pin two that is flush with the end face of the workpiece.

[0017] S061. Take the smallest coordinate value M1 among A1 and B1, and the largest coordinate value M2 among A2 and B2. Calculate the difference S1 between M2 and M1. If S1 is less than the standard value L1 or equal to the marked value L1, then S1 is qualified.

[0018] S062. Take the largest coordinate value N1 among C1 and D1, and the smallest coordinate value N2 among C2 and D2. Calculate the difference S2 after subtracting N1 from N2. If S2 is greater than or equal to the standard value L2, then S2 is qualified.

[0019] S063. When both S1 and S2 are qualified, take... For the final measurement result, S3 is compared with the standard mid-spacing L3. If |S3-L3|≤0.03, then the assembly of cylindrical pin one and cylindrical pin two is qualified; otherwise, if any value of S1, S2, or S3 does not meet the requirements, then the assembly of cylindrical pin one and cylindrical pin two is unqualified.

[0020] Furthermore, the loading / unloading station, milling station, drilling station, reaming station, assembly station, and inspection station are arranged in an elongated oval shape. The fixtures slide back and forth between the loading / unloading station, milling station, drilling station, reaming station, assembly station, and inspection station via an elongated oval track to realize the transformation of the workpiece between different stations.

[0021] Furthermore, the robotic arm of the loading / unloading robot is equipped with a rotating double gripper. When the loading / unloading robot performs loading / unloading operations at the loading / unloading station, it specifically includes the following steps:

[0022] S010. First, use one of the chucks to remove the unprocessed workpiece from the hopper;

[0023] S011. Rotate the chuck, and when the fixture moves to the loading / unloading station, use another chuck that is not holding a workpiece to remove the finished workpiece from the fixture.

[0024] S012. Rotate the chuck and place the previously clamped, unprocessed workpiece into the fixture.

[0025] S013. Rotate the chuck and place the workpiece into the scrap bin or finished product tray according to the detection results of S06.

[0026] Furthermore, after the loading and unloading robot removes the processed workpiece from the fixture, the fixture is first cleaned, and then the unprocessed workpiece is placed into the fixture.

[0027] Furthermore, in S01, the fixture contacts the end face of the workpiece with the stepped hole at the top to restrict the workpiece's degree of freedom in the vertical upward direction; the fixture contacts the front side of the workpiece to restrict the workpiece's degree of freedom in the forward direction; the semi-circular arc positioning plate is placed in the semi-circular arc groove in the middle of the workpiece and presses the workpiece in the height direction to restrict the workpiece's degree of freedom in the vertical downward direction and two degrees of freedom in the left and right directions; the hydraulic components press the rear side of the workpiece in the forward direction to restrict the workpiece's degree of freedom in the rearward direction; thereby, the workpiece is stably placed on the fixture to ensure that the workpiece's machining accuracy meets the machining requirements.

[0028] Furthermore, after the semi-circular arc positioning plate is placed in the semi-circular arc groove of the workpiece, the lower end of the semi-circular arc positioning plate is parallel to the lower end face of the workpiece; the probe measures the distance between the lower end of the semi-circular arc positioning plate and the lower end face of the workpiece, and determines whether the semi-circular arc positioning plate has pressed the workpiece tightly based on the measured data.

[0029] Furthermore, the silo includes a blank silo and a finished product silo. The blank silo is equipped with a blank loading transfer frame and at least two blank storage frames. The finished product silo is equipped with a finished product unloading transfer frame and at least two finished product storage frames. To ensure continuous operation, when the loading / unloading robot is idle, it can be used to place blanks from the blank storage frames into the blank loading transfer frame, facilitating the removal of the blanks by the loading / unloading robot. Similarly, it can also be used to place finished products from the finished product unloading transfer frame into the finished product storage frame, facilitating the placement of subsequent finished products into the finished product unloading transfer frame by the loading / unloading robot.

[0030] Furthermore, in step S02, an internal cooling system is used to cool and lubricate the workpiece.

[0031] Furthermore, step S05 specifically includes the following steps:

[0032] S050. First, use the vibrating feeding mechanism to send the cylindrical pins in the feeding box into the transmission pipe, and then use the solenoid valve to drop the cylindrical pins into the pin taker below the transmission pipe. Only one cylindrical pin will fall into the pin taker at a time.

[0033] S051. First, move the pin taker to one side via the slide rail, then move the main shaft of the pin-taking mechanism above the pin taker, and use the ejector pin to send the cylindrical pin inside the pin taker into the hydraulic chuck of the pin-taking mechanism.

[0034] S052. First, move the spindle of the pin-planting mechanism to the position of the cylindrical pin hole on the workpiece, and then press the cylindrical pin downwards. During this process, the clamping force of the pin-planting mechanism is controlled by the servo motor to ensure that the cylindrical pin assembly depth meets the requirements.

[0035] As can be seen from the above technical solutions, the present invention has the following advantages:

[0036] 1. Because this invention centralizes and automates the bearing cover processing steps, it not only reduces the number of cross-regional transfers, but also realizes the process of blanks entering and finished products exiting.

[0037] 2. When using the fully automated processing technology for engine bearing covers, the workpiece can be automatically picked up by the loading and unloading robot and placed into the fixture. Then, the workpiece is moved between various workstations by the movement of the fixture. After completing machining, assembly, and inspection in sequence, it returns to the loading and unloading station. Finally, the loading and unloading robot can place qualified workpieces into the finished product tray and unqualified workpieces into the scrap bin, thus completing the automated processing of the bearing cover.

[0038] 3. This invention can greatly shorten processing time; it can process a camshaft bearing cover in 40 seconds, thereby increasing its production capacity by 1.5 times.

[0039] 4. This invention can reduce the number of operators required for bearing cover processing; the traditional processing method requires 5 operators to produce 1350 products, while the automatic line only requires 1 operator per shift to replenish materials once every 2 hours. Therefore, to produce the same number of bearing covers, this invention saves 3 people compared to the traditional processing method. Attached Figure Description

[0040] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the processing area of ​​the bearing cap processed according to the present invention;

[0042] Figure 2 This is a schematic diagram showing the positioning of the bearing cap processed according to the present invention;

[0043] Figure 3 This is a schematic diagram showing the location of the measurement points in S06;

[0044] Figure 4 This is a schematic diagram of the layout of the fully automated production line for engine bearing caps in this invention.

[0045] In the diagram: 1. Stepped hole, 2. Cylindrical pin hole, 3. Plane A, 4. Loading and unloading station, 5. Milling station, 6. Drilling station, 7. Reaming station, 8. Assembly station, 9. Inspection station;

[0046] L3, cylindrical pin spacing;

[0047] A1. The minimum coordinate value of the end of the cylindrical pin located outside the workpiece in the X direction;

[0048] B1. The minimum coordinate value in the X direction of the cylindrical pin that is flush with the end face of the workpiece;

[0049] C1, the maximum coordinate value of the end of the cylindrical pin located outside the workpiece in the X direction;

[0050] D1, the maximum coordinate value in the X direction of the cylindrical pin that is flush with the end face of the workpiece;

[0051] A2. The maximum coordinate value of the end of the cylindrical pin located outside the workpiece in the X direction;

[0052] B2. The maximum coordinate value in the X direction of the point on cylindrical pin two that is flush with the end face of the workpiece.

[0053] C2, the minimum coordinate value of the end of the cylindrical pin located outside the workpiece in the X direction;

[0054] D2, the minimum coordinate value in the X direction of the point on the cylindrical pin 2 that is flush with the end face of the workpiece. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] This invention provides a fully automated machining process for engine bearing caps, which is mainly used for machining... Figure 1 The bearing cap shown is mainly made of... Figure 4 The engine bearing cover shown is produced using a fully automated production line.

[0057] Specifically, such as Figure 4 As shown, the fully automated production line for engine bearing caps includes fixtures, a loading / unloading station 4, a milling station 5, a drilling station 6, a reaming station 7, an assembly station 8, and an inspection station 9. These stations are arranged in an elongated oval shape. Additionally, a hopper is provided at the loading / unloading station 4, comprising a blank hopper and a finished product hopper. The blank hopper contains a blank loading transfer frame and at least two blank storage frames; the finished product hopper contains a finished product unloading transfer frame and at least two finished product storage frames.

[0058] The fixture slides back and forth between the loading / unloading station 4, milling station 5, drilling station 6, reaming station 7, assembly station 8, and inspection station 9 via an elongated circular track. When the workpiece is placed in the fixture, the fixture can contact the end face of the workpiece with the stepped hole 1 at the top, thereby restricting the workpiece's degree of freedom in the vertical upward direction. The fixture can also contact the front side of the workpiece, thereby restricting the workpiece's degree of freedom in the forward direction. A semi-circular arc positioning plate is placed in the semi-circular arc groove in the middle of the workpiece and presses the workpiece in the height direction, thereby restricting the workpiece's degree of freedom in the vertical downward direction and two degrees of freedom in the left and right directions. Hydraulic components press the rear side of the workpiece in the forward direction, thereby restricting the workpiece's degree of freedom in the rearward direction.

[0059] In addition, when the semi-circular arc positioning plate is placed in the semi-circular arc groove of the workpiece, since the lower end of the semi-circular arc positioning plate is set parallel to the lower end surface of the workpiece, the present invention can use a probe to measure the distance between the lower end of the semi-circular arc positioning plate and the lower end surface of the workpiece, and determine whether the semi-circular arc positioning plate presses the workpiece tightly based on the measured data, so as to ensure that the workpiece can be stably placed in the fixture.

[0060] The fully automated machining process for the engine bearing cover includes the following steps:

[0061] SO1, Loading: The loading and unloading robot is used to put the unprocessed workpiece into the fixture located at loading and unloading station 4.

[0062] S02, Milling plane A3, Deburring: First, move the fixture holding the workpiece from loading / unloading station 4 to milling plane station 5. Then, use a disc milling cutter to mill plane A3. Use a brush to clean the burrs around plane A3 and use an air mist internal cooling system to cool and lubricate the workpiece.

[0063] S03. Drill cylindrical pin hole 2 and enlarge stepped hole 1. First, move the fixture with the workpiece on it from milling plane station 5 to drilling station 6, and then use the drill bit to process cylindrical pin hole 2 and stepped hole 1 on the surface of the workpiece.

[0064] S04. Reaming the cylindrical pin hole 2: First, move the fixture with the workpiece on it from the drilling station 6 to the reaming station 7, and then ream the cylindrical pin hole 2.

[0065] S05. To assemble the cylindrical pins, first move the fixture holding the workpiece from the reaming station 7 to the assembly station 8, and then insert the cylindrical pin one and cylindrical pin two into the corresponding cylindrical pin holes 2 on the workpiece.

[0066] S06. To detect the distance between cylindrical pins, first move the fixture with the workpiece on it from assembly station 8 to detection station 9. Then, use an optical measuring device to take a picture of the surface of the workpiece with cylindrical pin 1 and cylindrical pin 2. Calculate the position of cylindrical pin 1 and cylindrical pin 2 based on the grayscale characteristics of the captured image. Determine whether the distance between cylindrical pin 1 and cylindrical pin 2 meets the processing requirements based on the position of cylindrical pin 1 and cylindrical pin 2.

[0067] S07. Unloading: First, move the fixture holding the workpiece from the inspection station 9 to the loading / unloading station 4. Then, use the loading / unloading robot to remove the finished workpiece from the fixture at the loading / unloading station 4. Based on the inspection results of S06, put the workpiece into the scrap box or finished product tray.

[0068] Furthermore, in S01 and S07 above, the robotic arm of the loading / unloading robot is also equipped with a rotating double gripper. Thus, when the loading / unloading robot performs loading / unloading operations at loading / unloading station 4, the specific steps include:

[0069] S010. First, use one of the chucks to remove the unprocessed workpiece from the hopper;

[0070] S011. Rotate the chuck, and when the fixture moves to the loading / unloading station, first use another chuck that is not holding a workpiece to remove the finished workpiece from the fixture, and then clean the fixture.

[0071] S012. Rotate the chuck and place the previously clamped, unprocessed workpiece into the fixture.

[0072] S013. Rotate the chuck and place the workpiece into the scrap bin or finished product tray according to the detection results of S06.

[0073] S05 above specifically includes the following steps:

[0074] S050. First, use the vibrating feeding mechanism to send the cylindrical pins in the feeding box into the transmission pipe, and then use the solenoid valve to drop the cylindrical pins into the pin taker below the transmission pipe. Only one cylindrical pin will fall into the pin taker at a time.

[0075] S051. First, move the pin taker to one side via the slide rail, then move the main shaft of the pin-taking mechanism above the pin taker, and use the ejector pin to send the cylindrical pin inside the pin taker into the hydraulic chuck of the pin-taking mechanism.

[0076] S052. First, move the main shaft of the pin mechanism to the position of the cylindrical pin hole 2 on the workpiece, and then press the cylindrical pin downward.

[0077] S06 above specifically includes the following steps:

[0078] S060, such as Figure 3 As shown, the direction from the center of cylindrical pin one to the center of cylindrical pin two is set as the X direction, and the direction from bottom to top is set as the Y direction. The coordinate values ​​A1, B1, C1, and D1 of cylindrical pin one installed on the workpiece in the X direction are measured, and the coordinate values ​​A2, B2, C2, and D2 of cylindrical pin two installed on the workpiece in the X direction are measured.

[0079] Among them, such as Figure 2 As shown, A1 is the minimum coordinate value in the X direction of the end of cylindrical pin one located outside the workpiece; B1 is the minimum coordinate value in the X direction of the point on cylindrical pin one that is flush with the end face of the workpiece; C1 is the maximum coordinate value in the X direction of the end of cylindrical pin one located outside the workpiece; and D1 is the maximum coordinate value in the X direction of the point on cylindrical pin one that is flush with the end face of the workpiece. A2 is the maximum coordinate value in the X direction of the end of cylindrical pin two located outside the workpiece; B2 is the maximum coordinate value in the X direction of the point on cylindrical pin two that is flush with the end face of the workpiece; C2 is the minimum coordinate value in the X direction of the end of cylindrical pin two located outside the workpiece; and D2 is the minimum coordinate value in the X direction of the point on cylindrical pin two that is flush with the end face of the workpiece.

[0080] S061. Take the smallest coordinate value M1 among A1 and B1, and the largest coordinate value M2 among A2 and B2. Calculate the difference S1 between M2 and M1. If S1 is less than the standard value L1 or equal to the marked value L1, then S1 is qualified. The standard value L1 is 52.03mm.

[0081] S062. Take the largest coordinate value N1 among C1 and D1, and the smallest coordinate value N2 among C2 and D2. Calculate the difference S2 after subtracting N1 from N2. If S2 is greater than or equal to the standard value L2, then S2 is qualified. The standard value L2 is 43.97mm.

[0082] S063. When both S1 and S2 are qualified, take... For the final measurement result, S3 is compared with the standard center distance L3. If |S3-L3|≤0.03, then the assembly of cylindrical pin one and cylindrical pin two is qualified; otherwise, if any value of S1, S2, or S3 does not meet the requirements, then the assembly of cylindrical pin one and cylindrical pin two is unqualified. The standard center distance L3 is 48mm.

[0083] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0084] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fully automatic machining process for an engine bearing cap, characterized in that, An automated production line for engine bearing caps is adopted. The automated production line for engine bearing caps includes loading and unloading stations, milling stations, drilling stations, reaming stations, assembly stations, and inspection stations arranged in an elongated oval shape. Fixtures slide back and forth between the loading and unloading stations, milling stations, drilling stations, reaming stations, assembly stations, and inspection stations via an elongated oval track. Includes the following steps: SO1, Loading: Using loading and unloading robots to put unprocessed workpieces into the fixtures located at the loading and unloading station; S02. Milling plane A and deburring: First, move the fixture with the workpiece on it from the loading and unloading station to the milling plane station. Then, use a disc milling cutter to mill plane A and use a brush to clean the burrs around plane A. S03. Drilling cylindrical pin holes and enlarging stepped holes: First, move the fixture with the workpiece on it from the milling station to the drilling station, and then use the drill bit to machine cylindrical pin holes and stepped holes on the surface of the workpiece. S04. Reaming the cylindrical pin hole: First, move the fixture holding the workpiece from the drilling station to the reaming station, and then ream the cylindrical pin hole. S05. To assemble the cylindrical pins, first move the fixture holding the workpiece from the reaming station to the assembly station, and then insert cylindrical pin one and cylindrical pin two into the corresponding cylindrical pin holes on the workpiece. S06. Detect the distance between cylindrical pins. First, move the fixture holding the workpiece from the assembly station to the detection station. Then, use an optical measuring device to photograph the surface of the workpiece equipped with cylindrical pin 1 and cylindrical pin 2. Calculate the positions of cylindrical pin 1 and cylindrical pin 2 based on the grayscale characteristics of the photographed image. Determine whether the distance between cylindrical pin 1 and cylindrical pin 2 meets the processing requirements based on their positions. This includes the following steps: S060. Set the distance from the center position of cylindrical pin 1 to the cylindrical pin 2... The direction of the center of the second cylindrical pin is the X direction. The coordinates A1, B1, C1, and D1 of the first cylindrical pin installed on the workpiece in the X direction are measured, as are the coordinates A2, B2, C2, and D2 of the second cylindrical pin installed on the workpiece in the X direction. A1 is the minimum coordinate value in the X direction of the end of the first cylindrical pin located outside the workpiece; B1 is the minimum coordinate value in the X direction of the part of the first cylindrical pin flush with the workpiece end face; and C1 is the minimum coordinate value in the X direction of the end of the first cylindrical pin located outside the workpiece. The maximum coordinate values ​​in the X direction are: D1 is the maximum coordinate value of the cylindrical pin one at the end flush with the workpiece end face in the X direction; A2 is the maximum coordinate value of the cylindrical pin two at the end outside the workpiece in the X direction; B2 is the maximum coordinate value of the cylindrical pin two at the end flush with the workpiece end face in the X direction; C2 is the minimum coordinate value of the cylindrical pin two at the end outside the workpiece in the X direction; and D2 is the minimum coordinate value of the cylindrical pin two at the end flush with the workpiece end face in the X direction. S061, take the value from A1 and B1. The smallest coordinate value M1 is taken. The largest coordinate value M2 among A2 and B2 is taken, and the difference S1 between M2 and M1 is calculated. If S1 is less than or equal to the standard value L1, then S1 is qualified. S062. The largest coordinate value N1 among C1 and D1 is taken. The smallest coordinate value N2 among C2 and D2 is taken, and the difference S2 between N2 and N1 is calculated. If S2 is greater than or equal to the standard value L2, then S2 is qualified. S063. When both S1 and S2 are qualified, take... For the final measurement result, S3 is compared with the standard median spacing L3. If Then, cylindrical pin one and cylindrical pin two are assembled successfully. S07. Unloading: First, move the fixture holding the workpiece from the inspection station to the loading / unloading station. Then, use the loading / unloading robot to remove the finished workpiece from the fixture at the loading / unloading station. Based on the inspection results of S06, put the workpiece into the scrap bin or finished product tray.

2. The engine bearing cap full automatic machining process of claim 1, wherein, The robotic arm of the loading / unloading robot is equipped with a rotating double gripper. When the loading / unloading robot performs loading / unloading operations at the loading / unloading station, the specific steps include: S010. First, use one of the chucks to remove the unprocessed workpiece from the hopper; S011. Rotate the chuck, and when the fixture moves to the loading / unloading station, use another chuck that is not holding a workpiece to remove the finished workpiece from the fixture. S012. Rotate the chuck and place the previously clamped, unprocessed workpiece into the fixture. S013. Rotate the chuck and place the workpiece into the scrap bin or finished product tray according to the detection results of S06.

3. The engine bearing cap full automatic machining process of claim 2, wherein, After the loading and unloading robot removes the processed workpiece from the fixture, the fixture is cleaned first, and then the unprocessed workpiece is put into the fixture.

4. The fully automated machining process for engine bearing caps according to claim 2, characterized in that, In S01, the fixture contacts the end face of the workpiece with the stepped hole at the top to restrict the workpiece's degree of freedom in the vertical upward direction; the fixture contacts the front side of the workpiece to restrict the workpiece's degree of freedom in the forward direction; the semi-circular positioning plate is placed in the semi-circular groove in the middle of the workpiece and presses the workpiece in the height direction to restrict the workpiece's degree of freedom in the vertical downward direction and the two degrees of freedom in the left and right directions; the hydraulic components press the rear side of the workpiece in the forward direction to restrict the workpiece's degree of freedom in the rearward direction.

5. The full automatic machining process of an engine bearing cap according to claim 4, characterized in that, After the semi-circular arc positioning plate is placed in the semi-circular arc groove of the workpiece, the lower end of the semi-circular arc positioning plate is parallel to the lower end face of the workpiece; the probe measures the distance between the lower end of the semi-circular arc positioning plate and the lower end face of the workpiece, and determines whether the semi-circular arc positioning plate has pressed the workpiece tightly based on the measured data.

6. The engine bearing cap full automatic machining process of claim 2, wherein, The silo includes a blank silo and a finished product silo. The blank silo is provided with a blank loading transfer frame and at least two blank storage frames. The finished product silo is provided with a finished product unloading transfer frame and at least two finished product storage frames.

7. The engine bearing cap full automatic machining process of claim 1, wherein, In step S02, the workpiece is cooled and lubricated using an internal aerosol cooling system.

8. The engine bearing cap full automatic machining process of claim 1, wherein, S05 specifically includes the following steps: S050. First, use the vibrating feeding mechanism to send the cylindrical pins in the feeding box into the transmission pipe, and then use the solenoid valve to drop the cylindrical pins into the pin taker below the transmission pipe. Only one cylindrical pin will fall into the pin taker at a time. S051. First, move the pin taker to one side via the slide rail, then move the main shaft of the pin-taking mechanism above the pin taker, and use the ejector pin to send the cylindrical pin inside the pin taker into the hydraulic chuck of the pin-taking mechanism. S052. First, move the main shaft of the pin mechanism to the position of the cylindrical pin hole on the workpiece, and then press the cylindrical pin downwards.

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