A cover assembly fixing block threaded hole perpendicularity optimization tool system

Abstract

The utility model provides a cover assembly fixed block threaded hole perpendicularity optimization frock system, include: support seat, elastic pin, plug, the utility model makes after welding fixed block threaded hole perpendicularity satisfy product design requirement and stability, has reached the requirement of cover assembly batch production, the utility model has the strong operability, frock system processing is simple, convenient installation, the utility model can be widely applied to different model hydraulic torque converter cover assembly fixed block welding, also can be applied to similar cover assembly stud welding, the utility model processes a gradient on support seat, makes fixed block threaded hole axis form a gradient when assembling, after welding, fixed block threaded hole axis is influenced by welding thermal deformation, corrects the gradient when assembling, makes the perpendicularity of fixed block threaded hole satisfy product design requirement, the perpendicularity optimization frock system has the characteristics such as simple structure, convenient clamping, strong practicality and can guarantee fixed block threaded hole perpendicularity after welding, is convenient for popularization and application.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic torque converter technology, specifically to a tooling system for optimizing the perpendicularity of the threaded hole in the fixing block of a cover assembly. Background Technology

[0002] The cover assembly is one of the main subassemblies in the hydraulic torque converter. The hydraulic torque converter is connected to the gearbox through the threaded hole of the cover assembly fixing block. The perpendicularity of the threaded hole of the cover assembly fixing block is a critical dimension for the connection. Therefore, it is crucial to ensure the first-pass yield of the perpendicularity of the threaded hole of the fixing block during mass production.

[0003] The main factors affecting the perpendicularity of the threaded holes in the cover assembly fixing block include: the structure of the welding fixture system for the cover assembly fixing block, the materials of the welding fixture system, and the welding process methods and parameters. Under the existing welding fixture system, the perpendicularity measurement value of the fixing block threaded holes after welding is 0.16mm-0.20mm. The product design requirement is that the perpendicularity measurement value of the fixing block threaded holes should not exceed 0.15mm. Parts with perpendicularity exceeding this tolerance must be scrapped. Therefore, improving the first-pass yield rate of the perpendicularity of the cover assembly fixing block threaded holes is an urgent issue to be addressed in the mass production of hydraulic torque converters.

[0004] The cover assembly fixing block is welded using a gas metal arc welding process. After welding, the end face of the fixing block is placed downwards on a flat measuring tool, and a feeler gauge is used to check the gap between the end faces of the fixing block. It is found that the fixing block is divided into inner and outer sides with the center line of the threaded hole. The perpendicularity of the threaded hole of the fixing block exceeds the tolerance. The gap on the outer side of the fixing block end face is twice the measured value of the threaded hole perpendicularity. The fit gap between the inner end face of the fixing block and the flat measuring tool is 0mm. The main problems with the existing tooling system are: 1. When the fixing block is installed on the welding tooling, the axis of the threaded hole of the fixing block is perpendicular to the tooling support. After welding, the axis of the threaded hole of the fixing block shrinks inward due to the heat deformation, causing the perpendicularity of the threaded hole of the fixing block to exceed the tolerance; 2. The material of the fixing block support in the existing tooling system is H62. The rigidity of H62 material is poor. After the fixing block and the cover are assembled and pressed on the welding tooling, the axis of the threaded hole of the fixing block is deformed relative to the support surface of the fixing block of the cover assembly, which also has a certain impact on the perpendicularity of the threaded hole of the fixing block. Utility Model Content

[0005] The purpose of this utility model is to provide a tooling system for optimizing the perpendicularity of the threaded hole of the cover assembly fixing block, including: a support base, an elastic pin, and a plug.

[0006] The support base has a T-shaped bottom, and the horizontal plate of the T-shaped structure extends upward to form a step.

[0007] The bottom vertical plate of the support base is inclined upward, forming an angle α with the horizontal plane, where α is a positive number.

[0008] The step surface at the horizontal plate of the support base is parallel to the horizontal plane, and the step surface at the vertical plate is parallel to the bottom surface.

[0009] The support base has a stepped hole on the bottom vertical plate, and several threaded holes are provided around the stepped hole.

[0010] The axes of the stepped hole and the threaded hole are perpendicular to the bottom surface.

[0011] The bottom horizontal plate of the support base is provided with several positioning holes and countersunk screw holes.

[0012] The axes of the positioning hole and the countersunk screw hole are perpendicular to the bottom surface.

[0013] The elastic pin is a stepped cylindrical structure, with the top of the smaller diameter end evenly divided into several lobes to form a segmented structure.

[0014] The stepped structure of the elastic pin is adapted to the stepped hole.

[0015] The plug is a rectangular plate structure, and a columnar extension block is provided at the center of the rectangular plate.

[0016] The outer diameter of the columnar extension block at the center of the plug is adapted to the larger inner diameter of the step in the stepped hole.

[0017] The columnar extension block is surrounded by through holes corresponding to the threaded holes.

[0018] The support base is fixed to the positioning fixture body through positioning holes and countersunk screw holes.

[0019] The elastic pin is placed in the stepped hole of the support and sealed by a plug.

[0020] The through hole of the plug is fixedly connected to the threaded hole of the support base by a screw.

[0021] The split structure of the elastic pin is fixedly connected to the fixing block, and the fixing block supports the cover assembly.

[0022] Furthermore, the support base is made of 45 steel.

[0023] Furthermore, the material used for the elastic pin includes 65Mn.

[0024] Furthermore, the plug is made of 45 steel.

[0025] Furthermore, the angle α formed by the bottom surface of the support base and the horizontal plane ranges from 1° to 2°.

[0026] Furthermore, the gap distance of the segmented structure of the elastic pin ranges from 1mm to 2mm.

[0027] The technical advantages of this invention are undeniable. The tooling system provided by this invention ensures that the perpendicularity of the threaded holes in the welded fixing block meets and remains stable according to product design requirements, thus achieving the requirements for mass production of the cover assembly. This invention is highly operable, and the tooling system is simple to process and easy to install. This invention can be widely applied to the welding of fixing blocks for different models of hydraulic torque converter cover assemblies, and can also be applied to the welding of studs for cover assemblies with similar shapes.

[0028] This invention, verified through actual production, improves the first-pass yield of the perpendicularity of the threaded holes in the cover assembly fixing block. It provides a tooling system for optimizing the perpendicularity of the cover assembly fixing block. This system machines an angle on the support base, creating an angle on the axis of the threaded hole during assembly. After welding, the angle is corrected by the heat deformation during welding, ensuring the perpendicularity of the threaded hole meets product design requirements. This perpendicularity optimization tooling system features simple structure, convenient clamping, high practicality, and the ability to guarantee the perpendicularity of the threaded hole after welding, making it easy to promote and apply. Attached Figure Description

[0029] Figure 1 A schematic diagram illustrating the working principle of the tooling for optimizing verticality;

[0030] Figure 2 This is a schematic diagram of the support structure; Figure 2 (a) is a bottom view of the support base; Figure 2 (b) is a sectional view of the support base;

[0031] Figure 3 This is a schematic diagram of a flexible pin structure; Figure 3 (a) is a sectional view of the elastic pin; Figure 3 (b) is a top view of the flexible pin;

[0032] Figure 4 This is a schematic diagram of the plug structure; Figure 4 (a) is a sectional view of the plug; Figure 4 (b) is a top view of the plug;

[0033] In the figure: support base 101, stepped hole 1011, threaded hole 1012, positioning hole 1013, countersunk screw hole 1014, elastic pin 102, split structure 1021, plug 103, through hole 1031, cover assembly 2, fixing block 3, positioning fixture body 4. Detailed Implementation

[0034] The present invention will be further described below with reference to embodiments, but it should not be construed as the scope of the present invention being limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and conventional methods in the art without departing from the above-described technical concept of the present invention should be included within the protection scope of the present invention.

[0035] Example 1:

[0036] See Figures 1 to 4 A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block includes: a support 101, an elastic pin 102, and a plug 103.

[0037] The support base 101 has a T-shaped bottom surface, and the horizontal plate of the T-shaped structure extends upward to form a step.

[0038] The bottom vertical plate of the support base 101 is inclined upward, forming an angle α with the horizontal plane, where α is a positive number.

[0039] The step surface of the horizontal plate of the support 101 is parallel to the horizontal plane, and the step surface of the vertical plate is parallel to the bottom surface.

[0040] The support base 101 has a stepped hole 1011 on the bottom vertical plate, and a number of threaded holes 1012 are provided around the stepped hole 1011.

[0041] The axes of the stepped hole 1011 and the threaded hole 1012 are perpendicular to the bottom surface.

[0042] The bottom horizontal plate of the support base 101 is provided with several positioning holes 1013 and countersunk screw holes 1014.

[0043] The axes of the positioning hole 1013 and the countersunk screw hole 1014 are perpendicular to the bottom surface.

[0044] The elastic pin 102 is a stepped cylindrical structure, and the top of the smaller diameter end is evenly divided into several lobes to form a lobed structure 1021.

[0045] The stepped structure of the elastic pin 102 is adapted to the stepped hole 1011.

[0046] The plug 103 is a rectangular plate structure, and a columnar extension block is provided at the center of the rectangular plate.

[0047] The outer diameter of the columnar extension block at the center of the plug 103 is adapted to the larger inner diameter of the step in the stepped hole 1011.

[0048] The columnar extension block is surrounded by through holes 1031 corresponding to the threaded hole 1012.

[0049] The support base 101 is fixed to the positioning fixture body 4 through the positioning hole 1013 and the countersunk screw hole 1014.

[0050] The elastic pin 102 is placed in the stepped hole 1011 of the support base 101 and is sealed by the plug 103.

[0051] The through hole 1031 of the plug 103 is fixedly connected to the threaded hole 1012 of the support base 101 by screws.

[0052] The split structure 1021 of the elastic pin 102 is fixedly connected to the fixing block 3, and the fixing block 3 supports the cover assembly 2.

[0053] Example 2:

[0054] A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block is described in Embodiment 1. Further, the material used for the support base 101 includes 45 steel.

[0055] Example 3:

[0056] A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block, the main technical contents of which are described in any one of Embodiments 1 to 2, further wherein the material used for the elastic pin 102 includes 65Mn.

[0057] Example 4:

[0058] A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block is provided. The main technical contents are described in any one of Embodiments 1 to 3. Furthermore, the material used for the plug 103 includes 45 steel.

[0059] Example 5:

[0060] A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block, the main technical contents of which are described in any one of embodiments 1 to 4, further wherein the angle α formed by the bottom surface of the support 101 and the horizontal plane is in the range of 1°-2°.

[0061] Example 6:

[0062] A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block, the main technical contents of which are described in any one of embodiments 1 to 5, further wherein the gap distance of the segmented structure 1021 of the elastic pin 102 is in the range of 1mm-2mm.

[0063] Example 7:

[0064] See Figures 1 to 4 A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block includes: a support 101, an elastic pin 102, and a plug 103.

[0065] The support base 101 has a T-shaped bottom surface, and the horizontal plate of the T-shaped structure extends upward to form a step.

[0066] The bottom vertical plate of the support base 101 is inclined upward, forming an angle α with the horizontal plane, where α is a positive number.

[0067] The step surface of the horizontal plate of the support 101 is parallel to the horizontal plane, and the step surface of the vertical plate is parallel to the bottom surface.

[0068] The support base 101 has a stepped hole 1011 on the bottom vertical plate, and a number of threaded holes 1012 are provided around the stepped hole 1011.

[0069] The axes of the stepped hole 1011 and the threaded hole 1012 are perpendicular to the bottom surface.

[0070] The bottom horizontal plate of the support base 101 is provided with several positioning holes 1013 and countersunk screw holes 1014.

[0071] The axes of the positioning hole 1013 and the countersunk screw hole 1014 are perpendicular to the bottom surface.

[0072] The elastic pin 102 is a stepped cylindrical structure, and the top of the smaller diameter end is evenly divided into several lobes to form a lobed structure 1021.

[0073] The stepped structure of the elastic pin 102 is adapted to the stepped hole 1011.

[0074] The plug 103 is a rectangular plate structure, and a columnar extension block is provided at the center of the rectangular plate.

[0075] The outer diameter of the columnar extension block at the center of the plug 103 is adapted to the larger inner diameter of the step in the stepped hole 1011.

[0076] The columnar extension block is surrounded by through holes 1031 corresponding to the threaded hole 1012.

[0077] The support base 101 is fixed to the positioning fixture body 4 through the positioning hole 1013 and the countersunk screw hole 1014.

[0078] The elastic pin 102 is placed in the stepped hole 1011 of the support base 101 and is sealed by the plug 103.

[0079] The through hole 1031 of the plug 103 is fixedly connected to the threaded hole 1012 of the support base 101 by screws.

[0080] The split structure 1021 of the elastic pin 102 is fixedly connected to the fixing block 3, and the fixing block 3 supports the cover assembly 2.

[0081] When the cover assembly 2 is fixed by the device for welding, due to the tilt angle α of the bottom surface of the support 101, when the external pressure device applies pressure to the cover assembly 2, the outer extension of the cover assembly 2 tilts downward. At this time, when the cover assembly 2 is welded, due to the influence of thermal deformation, the outer extension of the cover assembly 2 will be tilted upward, so that the welded cover assembly 2 meets the product design requirements.

[0082] Example 8:

[0083] A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block is described in Embodiment 7. Further, the material used for the support base 101 includes 45 steel.

[0084] Example 9:

[0085] A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block is provided. The main technical contents are described in any one of embodiments 7 to 8. Furthermore, the material used for the elastic pin 102 includes 65Mn.

[0086] Example 10:

[0087] A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block is provided. The main technical contents are described in any one of embodiments 7 to 9. Furthermore, the material used for the plug 103 includes 45 steel.

[0088] Example 11:

[0089] A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block is provided. The main technical contents are described in any one of embodiments 7 to 10. Furthermore, the angle α formed by the bottom surface of the support 101 and the horizontal plane is in the range of 1°-2°.

[0090] Example 12:

[0091] A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block is provided. The main technical contents are described in any one of embodiments 7 to 11. Furthermore, the gap distance of the segmented structure 1021 of the elastic pin 102 is in the range of 1mm-2mm.

[0092] The upper cylinder has a diameter ranging from 8mm to 10mm and a height ranging from 24mm to 26mm. The upper cylinder is divided into 4 to 6 evenly spaced lobes with a gap of 1mm to 2mm. The height of the lobed portion ranges from 15mm to 17mm. The lower cylinder has a diameter ranging from 12mm to 14mm and a height ranging from 5mm to 7mm. The upper and lower cylinders are coaxial.

[0093] Example 13:

[0094] See Figures 1 to 4A tooling system for optimizing the perpendicularity of the threaded hole of a cover assembly fixing block mainly includes: a support base, an elastic pin, and a plug.

[0095] The support base is a cuboid structure with threaded holes and round holes at the bottom.

[0096] The elastic pin has a cylindrical structure with a segmented upper part.

[0097] The plug has a cylindrical upper part and a cuboid lower part with a circular hole at the bottom.

[0098] The support base, elastic pin, and plug are three independent structures.

[0099] With the cover assembly fixing block welded, the support seat is assembled onto the positioning fixture body, the elastic pin is installed onto the support seat through the round hole, and the plug is connected to the support seat through the threaded hole.

[0100] The support base is made of 45 steel.

[0101] The material used for the elastic pin includes 65Mn.

[0102] The plug is made of 45 steel.

[0103] The support base is a stepped cuboid. The right cuboid has a width of 50mm-53mm, a length of 35mm-37mm, and a height of 31mm-33mm. The left cuboid has a width of 20mm-24mm, a length of 33mm-36mm, and a height of 22mm-24mm. The upper and lower planes of the left cuboid are inclined at an angle of 1°-2°. A stepped hole is opened inside the left cuboid. The large hole and the small hole are coaxial. The diameter of the large hole ranges from 12mm-14mm, and the depth is 9mm-11mm. The diameter of the small hole ranges from 8mm-10mm, and the depth is 13mm-15mm. Two threaded holes are symmetrically opened on the lower end face of the left cuboid around the center line of the stepped hole. The diameter of the threaded holes ranges from 3mm-4mm, and the depth is 6mm-8mm. The center lines of the stepped hole and the threaded holes are perpendicular to the upper and lower planes of the left cuboid.

[0104] The elastic pin is a stepped cylinder. The diameter of the upper cylinder ranges from 8mm to 10mm, and the height ranges from 24mm to 26mm. The upper cylinder is divided into 4 to 6 evenly spaced lobes with a gap of 1mm to 2mm. The height of the lobed portion ranges from 15mm to 17mm. The diameter of the lower cylinder ranges from 12mm to 14mm, and the height ranges from 5mm to 7mm. The upper and lower cylinders are coaxial.

[0105] The plug has a cylindrical upper part and a cuboid lower part. The diameter of the upper cylinder ranges from 10mm to 12mm, and the height ranges from 3mm to 5mm. The width of the lower cuboid ranges from 20mm to 24mm, the length ranges from 22mm to 24mm, and the height ranges from 3mm to 5mm. The center of the cylinder coincides with the center of the cuboid. Two circular holes are symmetrically opened on the left and right sides of the center of the cuboid. The diameter of the circular holes ranges from 3.5mm to 5.5mm, and the two circular holes are through holes.

Claims

1. A cover assembly fixture block threaded hole perpendicularity optimization tooling system, characterized by, include: Support base (101), flexible pin (102), plug (103); The support base (101) has a T-shaped bottom surface, and the horizontal plate of the T-shaped structure extends upward to form a step; The bottom vertical plate of the support base (101) is inclined upward, forming an angle α with the horizontal plane, where α is a positive number; The step surface at the horizontal plate of the support base (101) is parallel to the horizontal plane, and the step surface at the vertical plate is parallel to the bottom surface; The support base (101) has a stepped hole (1011) on the bottom vertical plate, and a number of threaded holes (1012) are provided around the stepped hole (1011). The axes of the stepped hole (1011) and the threaded hole (1012) are perpendicular to the bottom surface; The bottom horizontal plate of the support base (101) is provided with several positioning holes (1013) and countersunk screw holes (1014). The axes of the positioning hole (1013) and the countersunk screw hole (1014) are perpendicular to the bottom surface; The elastic pin (102) is a stepped cylindrical structure, and the top of the smaller diameter end is evenly divided into several lobes to form a lobed structure (1021). The stepped structure of the elastic pin (102) is adapted to the stepped hole (1011); The plug (103) is a rectangular plate structure, and a columnar extension block is provided at the center of the rectangular plate; The outer diameter of the columnar extension block at the center of the plug (103) is adapted to the larger inner diameter of the step in the stepped hole (1011); The columnar extension block is surrounded by a through hole (1031) corresponding to the threaded hole (1012). The support base (101) is fixed to the positioning fixture body (4) through the positioning hole (1013) and the countersunk screw hole (1014); The elastic pin (102) is placed in the stepped hole (1011) of the support base (101) and sealed by the plug (103); The through hole (1031) of the plug (103) is fixedly connected to the threaded hole (1012) of the support base (101) by screws; The split structure (1021) of the elastic pin (102) is fixedly connected to the fixing block (3), and the cover assembly (2) is supported by the fixing block (3).

2. The system of claim 1, wherein the system further comprises a fixture. The support base (101) is made of 45 steel.

3. The system of claim 1, wherein the system further comprises a fixture. The material used for the elastic pin (102) includes 65Mn.

4. The system of claim 1, wherein the system further comprises a fixture. The plug (103) is made of 45 steel.

5. The system of claim 1, wherein, The angle α formed by the bottom surface of the support (101) and the horizontal plane ranges from 1° to 2°.

6. The tooling system for optimizing the perpendicularity of the threaded hole in the cover assembly fixing block according to claim 1, characterized in that, The gap distance of the split structure (1021) of the elastic pin (102) ranges from 1mm to 2mm.

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