6AT transmission sub-assembly key hole system testing fixture and use method thereof

Abstract

The invention discloses a 6AT transmission sub-assembly key hole system testing fixture and a using method thereof, and belongs to the technical field of transmission production. The upper end face of the attaching plate is connected with the connecting column, the lower end face of the attaching plate is connected with the upper ends of the probes, and the side wall of the attaching plate is in threaded connection with the screws. The upper end of the connecting column is connected with the handle; the plurality of probes are arranged in one-to-one correspondence with the corresponding holes; according to the invention, a multi-parameter probe group is carried by adopting the fitting plate which is completely profiled with the surface of the valve body, so that the on-off verification of the hole channel, the axial depth tolerance detection and the blind hole structure integrity inspection can be synchronously completed through single fitting operation, and the quality risk caused by the traditional step-by-step detection is thoroughly eliminated. A modularized probe threaded connection structure is matched with a mistake-proof design, rapid replacement and maintenance are achieved, meanwhile, the requirement for an independent detection station is eliminated, equipment investment and site occupation are remarkably reduced, and the quality control process of the transmission assembly is fundamentally optimized under the condition that the 100% detection coverage rate is guaranteed.

Description

Technical Field

[0001] The present invention relates to a 6AT transmission sub-assembly key hole system inspection tool and a use method thereof, belonging to the technical field of transmission production. Background Art

[0002] In the field of automatic transmission manufacturing, the machining accuracy of 6AT transmission subassemblies directly determines the overall performance and reliability of the transmission. The valve body interface, a critical functional structure, includes multiple sets of oil passage holes, positioning holes, and connection holes with strict positioning and depth requirements. Any machining defect in these holes can cause failure of the transmission hydraulic system or assembly interference.

[0003] Existing production lines typically employ an online, step-by-step inspection process, using specialized inspection fixtures at each processing station to perform item-by-item verification of critical hole systems. However, due to internal quality fluctuations in the casting (such as hole obstruction caused by pinholes and air holes), tool breakage due to abnormal tool wear during machining, reduced spindle precision, and variations in process stability due to operator turnover, occasional single-hole machining anomalies still occur in actual production, manifesting as hole obstruction or axial machining depth failing to meet design tolerances.

[0004] Since the existing inspection scheme adopts a discrete inspection fixture layout, each workstation can only implement one-way inspection on a specific hole system and lacks a multi-parameter coupling verification mechanism; the manual re-inspection mode is subject to the limitation of the inspection cycle and cannot achieve 100% coverage of the entire hole system under the batch production cycle; and the hidden channel blockage caused by casting defects has random characteristics, and traditional airtightness detection methods have insufficient sensitivity to identify tiny pores. These local defects are difficult to be effectively identified through traditional step-by-step inspection methods, resulting in a significantly increased risk of defective parts flowing out, which may cause the transmission assembly to be repaired at the least, and the entire vehicle power transmission system to fail at worst, posing a serious threat to product quality control and the reputation of the OEM.

[0005] If the traditional improvement plan of adding a full set of independent inspection stations is adopted, not only will high equipment costs and additional site resources be required, but its offline inspection mode is also contrary to the lean production concept and is difficult to adapt to the highly flexible and high-speed production characteristics of modern transmission production lines. Summary of the Invention

[0006] In order to solve the problems existing in the background technology, the present invention provides a 6AT transmission sub-assembly key hole system inspection tool and a use method thereof.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a 6AT transmission sub-assembly key hole system inspection tool, comprising a handle, a connecting column, a bonding plate and a plurality of probes; the outer shape of the bonding plate is consistent with the transmission sub-assembly valve body surface, the upper end surface of the bonding plate is fixedly connected to the lower end of the connecting column, the upper end of the connecting column is fixedly connected to the handle, and the lower end surface of the bonding plate is threadedly connected to the upper ends of a plurality of probes, the plurality of probes comprising a DA torque converter engagement pressure probe, a DR torque converter disengagement pressure probe, a C1 clutch oil pressure probe, a front end lubricating oil pressure probe, a C3 clutch oil pressure probe, a rear end lubricating oil pressure probe, a cast blind hole probe, a cooler return lubricating oil pressure probe, a cooler inlet oil pressure probe and a cast collar probe; the plurality of probes are arranged in one-to-one correspondence with the corresponding holes; the side wall of the bonding plate is threadedly connected to the threaded end of the screw.

[0008] Furthermore, the flatness of the working surface where the bonding plate is threadedly connected to each probe is ≤0.05 mm.

[0009] Furthermore, the position accuracy of each threaded hole of the bonding plate is 0.1≤mm.

[0010] Furthermore, each of the probes is based on the probe thread, and the coaxiality between the probe head and the probe thread is ≤0.05mm.

[0011] Furthermore, the front end lubricating oil pressure probe, C3 clutch oil pressure probe, casting blind hole probe and cooler return lubricating oil pressure probe are all stepped probes.

[0012] Furthermore, the connecting column is made of nylon.

[0013] Furthermore, the surface of the handle is knurled.

[0014] Furthermore, the handle forms an angle of 30° with the bottom surface of the transmission sub-assembly.

[0015] Furthermore, the threaded end of each probe is provided with a groove.

[0016] A method for using a 6AT transmission sub-assembly key hole system inspection tool of the present invention comprises the following steps: S1: Place the bottom surface of the clutch sub-assembly to be tested flat on the workbench, making sure the valve body surface of the transmission sub-assembly is perpendicular to the horizontal plane of the workbench; S2: Adjust the screw-in depth to ensure that the position of each probe on the fitting plate corresponds to the position of the hole system on the valve body surface in the plane; S3: The staff member holds the handle and pushes the bonding plate along the horizontal surface of the workbench toward the transmission sub-assembly valve body surface, fitting the bonding plate to the valve body surface so that the probes are inserted into the main holes of the valve body surface simultaneously; If all probes are inserted smoothly and the fitting plate is completely fitted with the valve body surface, it proves that the hole processing depth meets the standard and the blind hole depth test is qualified, and the workpiece can be released off the line; If a probe is blocked from insertion, causing the fitting plate to be unable to completely fit with the valve body surface, it indicates that the corresponding hole has a problem of incomplete casting or insufficient processing depth, that is, the inspection fails, and the workpiece is stored separately and returned for repair later.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This system utilizes a multi-parameter probe assembly mounted on a laminating plate that perfectly aligns with the valve body surface. This allows for simultaneous verification of channel continuity, axial depth tolerance, and blind hole structural integrity inspection in a single laminating operation, completely eliminating the quality risks associated with traditional, step-by-step testing. The modular probe threaded connection, combined with a fault-proofing design, enables rapid replacement and maintenance. By eliminating the need for independent testing stations, this significantly reduces equipment investment and site requirements, fundamentally optimizing the transmission assembly quality control process while ensuring 100% inspection coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 yes Figure 1 Top view of . DETAILED DESCRIPTION

[0019] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] A 6AT transmission subassembly key hole system inspection tool includes a handle 2, a connecting column 4, a fitting plate 5, and multiple probes. The fitting plate 5 is contoured to the transmission subassembly valve body surface and is used to accurately inspect the hole system position. The upper end of the fitting plate 5 is fixedly connected to the lower ends of two parallel connecting columns 4. The upper ends of the two connecting columns 4 are fixedly connected to the ends of the handle 2 via aluminum M8 hexagon socket screws 1 to prevent the handle from rotating due to a single connecting column. A standard M8 spring washer 3 is placed between the aluminum M8 hexagon socket screw 1 and the handle 2 to prevent loosening. The lower end surface of the bonding plate 5 is threadedly connected to the upper ends of multiple probes. These probes include the DA torque converter engagement pressure probe 6, the DR torque converter disengagement pressure probe 7, the C1 clutch oil pressure probe 8, the front lubricating oil pressure probe 9, the C3 clutch oil pressure probe 10, the rear lubricating oil pressure probe 12, the cast blind hole probe 13, the cooler return lubricating oil pressure probe 14, the cooler inlet oil pressure probe 15, and the cast collar probe 16. The probes are positioned one-to-one with the corresponding holes. The multiple probes are threadedly connected to the bonding plate 5, ensuring the spatial consistency of the probe group. The side wall of the bonding plate 5 is threadedly connected to the threaded end of an aluminum M4 hexagon socket screw 11.

[0021] Furthermore, both sides of the bonding plate 5 are flat-ground, and the flatness of the working surface connected to each probe thread is ≤0.05mm.

[0022] Furthermore, the position accuracy of each threaded hole of the bonding plate 5 is 0.1≤mm.

[0023] Furthermore, each of the probes is based on the probe thread, and the coaxiality between the probe head and the probe thread is ≤0.05mm.

[0024] Furthermore, in order to detect the stepped hole in the transmission sub-assembly molding cavity, the front end lubricating oil pressure probe 9, C3 clutch oil pressure probe 10, casting blind hole probe 13 and cooler return lubricating oil pressure probe 14 are all stepped probes with varying diameters.

[0025] The innovative stepped probe structure combined with high-precision coaxiality control can accurately identify tiny pore blockages and abnormal processing depths, significantly improving the reliability of detecting casting defects and process deviations.

[0026] Furthermore, in order to make the inspection tool of the present invention lighter as a whole and more suitable for on-site operation and inspection, the connecting column 4 is made of nylon, and all other machined materials are made of 6061 aluminum alloy.

[0027] The lightweight nylon connecting column and ergonomic tilt handle design make inspection operations convenient and efficient, perfectly adapting to the high-speed production requirements of modern transmission production lines.

[0028] Furthermore, considering the workload of nearly a thousand pieces per day, the surface of the handle 2 is knurled to make it more suitable for human hands to grasp.

[0029] Furthermore, the handle 2 is at an angle of 30° to the bottom surface of the transmission sub-assembly, making it easier for the operator to operate.

[0030] Furthermore, considering that the probe may detect unqualified products and break during long-term use, the threaded end of each probe is provided with a groove for removal with a flat-blade screwdriver. When a probe of the inspection fixture breaks, the production line personnel can remove it and replace it by themselves.

[0031] A method for using a 6AT transmission sub-assembly key hole system inspection tool of the present invention comprises the following steps: S1: Place the bottom surface of the clutch sub-assembly to be tested flat on the workbench, making sure the valve body surface of the transmission sub-assembly is perpendicular to the horizontal plane of the workbench; S2: Since there is a certain distance between the horizontal plane of the workbench and the bottom edge of the transmission sub-assembly valve body surface within the transmission sub-assembly valve body surface, adjust the screw-in depth of the aluminum M4 hexagon socket screw 11 to ensure that the position of each probe on the bonding plate 5 corresponds to the position of the hole system on the valve body surface in the plane. Adjust the horizontal position of the probe in this way. After adjusting the screw 11 to the appropriate distance, tighten the threaded joint with glue. S3: The worker holds the handle 2 and pushes the bonding plate 5 along the horizontal surface of the workbench toward the transmission sub-assembly valve body surface, fitting the bonding plate to the valve body surface so that the probes are inserted into the main holes of the valve body surface simultaneously; If all probes are inserted smoothly and the fitting plate 5 is completely fitted with the valve body surface, the operator can see the red-painted probe in the torque converter plane cavity, which proves that the hole system processing depth meets the standard and the blind hole depth test is qualified, and the workpiece can be released off the line; If the insertion of a probe is blocked, so that the fitting plate 5 cannot be completely fitted with the valve body surface, it indicates that the corresponding hole has a problem of incomplete casting or insufficient processing depth, that is, the inspection fails, and the workpiece is stored separately and repaired later.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0033] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A 6AT transmission sub-assembly key hole system inspection tool, characterized by: The invention comprises a handle (2), a connecting column (4), a bonding plate (5) and a plurality of probes; the outer shape of the bonding plate (5) is consistent with the surface of the transmission sub-assembly valve body; the upper end surface of the bonding plate (5) is fixedly connected to the lower end of the connecting column (4); the upper end of the connecting column (4) is fixedly connected to the handle (2); the lower end surface of the bonding plate (5) is threadedly connected to the upper ends of the plurality of probes; the plurality of probes include a DA torque converter engagement pressure probe (6), a DR torque converter separation pressure probe (7), a C1 clutch oil pressure probe (8), a front lubricating oil pressure probe (9), a C3 clutch oil pressure probe (10), a rear lubricating oil pressure probe (12), a cast blind hole probe (13), a cooler return lubricating oil pressure probe (14), a cooler inlet oil pressure probe (15) and a cast collar probe (16); the plurality of probes are arranged in a one-to-one correspondence with the corresponding holes; the side wall of the bonding plate (5) is threadedly connected to the threaded end of the screw (11).

2. A 6AT transmission sub-assembly key hole system inspection tool according to claim 1, characterized in that: The flatness of the working surface of the laminating plate (5) threadedly connected to each probe is ≤0.05 mm.

3. The 6AT transmission sub-assembly key hole system inspection tool according to claim 1 is characterized by: The position accuracy of each threaded hole of the bonding plate (5) is 0.1≤mm.

4. The 6AT transmission sub-assembly key hole system inspection tool according to claim 1, characterized in that: Each of the probes is based on the probe thread, and the coaxiality between the probe head and the probe thread is ≤0.05mm.

5. The 6AT transmission sub-assembly key hole system inspection tool according to claim 1, characterized in that: The front end lubricating oil pressure probe (9), the C3 clutch oil pressure probe (10), the cast blind hole probe (13), and the cooler return lubricating oil pressure probe (14) are all stepped probes.

6. The 6AT transmission sub-assembly key hole system inspection tool according to claim 1, characterized in that: The connecting column (4) is made of nylon.

7. The 6AT transmission sub-assembly key hole system inspection tool according to claim 1, characterized in that: The surface of the handle (2) is knurled.

8. The 6AT transmission sub-assembly key hole system inspection tool according to claim 7, characterized in that: The handle (2) forms an angle of 30° with the bottom surface of the transmission sub-assembly.

9. The 6AT transmission sub-assembly key hole system inspection tool according to claim 1, characterized in that: The threaded end of each probe is provided with a groove.

10. A method for using the 6AT transmission sub-assembly key hole system inspection tool according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1: Place the bottom surface of the clutch sub-assembly to be tested flat on the workbench, making sure the valve body surface of the transmission sub-assembly is perpendicular to the horizontal plane of the workbench; S2: Adjust the screwing depth of the screw (11) to ensure that the position of each probe on the fitting plate (5) corresponds to the position of the hole system on the valve body surface in the plane; S3: The staff member holds the handle (2) and pushes the bonding plate (5) along the horizontal surface of the workbench toward the transmission sub-assembly valve body surface, and bonds the bonding plate to the valve body surface so that each probe is synchronously inserted into the main hole of the valve body surface; If all probes are inserted smoothly and the fitting plate (5) is completely fitted with the valve body surface, it proves that the hole processing depth meets the standard and the blind hole depth test is qualified, and the workpiece can be released off the line; If a probe is blocked from being inserted, so that the fitting plate (5) cannot be completely fitted with the valve body surface, it indicates that the corresponding hole has a problem of incomplete casting or insufficient machining depth, that is, the test fails, and the workpiece is stored separately and repaired later.

Images