A device and method for ensuring the consistency of the reference of threaded workpieces

Abstract

The application provides a device and method for ensuring the consistency of the reference of threaded connection workpieces. The device is characterized in that it comprises a checking ring gauge (7), a checking plug gauge (9), a standard workpiece A (11), a standard workpiece B (13) and a torque wrench (21). The standard workpiece A (11) is a standard female plate workpiece produced according to the workpiece A (1). The standard workpiece B (13) is a standard female plate workpiece produced according to the drawing requirement of the workpiece B (4). The checking ring gauge (7) is a special line marking checking tool. The torque wrench (21) is used for controlling the torque when the workpieces are assembled. The standard workpiece A (11) and the standard workpiece B (13) are connected and used for providing a machining reference line. The application improves the consistency of the assembly angle of the threaded connection workpieces, ensures the transmission of the threaded feature points on the previous workpiece to the next workpiece, and realizes the relative fixation of the feature positions of the assembled workpieces and the assembly consistency.

Description

Technical Field

[0001] This invention relates to the field of mechanical assembly, and more specifically, to a method and apparatus for ensuring consistency of reference datum in threaded connection workpieces. Background Technology

[0002] A certain product has a typical rotating structure, and the workpieces are connected by threads. During the assembly process, two workpieces are connected to the left-hand and right-hand threads of the connecting ring respectively. Then, by continuously adjusting the position of the connecting ring, the spatial angle of the reference feature on the two workpieces connected to the connecting ring is kept constant, so as to achieve the consistency of the spatial angle of the reference feature of each product after the assembly of each batch of products.

[0003] The existing assembly process suffers from a lack of control over the thread machining of individual workpieces, resulting in a rather random datum position after assembly. To ensure the spatial angle of the two datum features on the product, the connecting ring and the rear half of the product must be repeatedly adjusted. During this adjustment process, it is unavoidable that the already screened front half of the product and the cable inside workpiece A will move or twist. In some extreme cases, the connecting ring and workpiece need to be rotated 90° and reassembled, making it difficult to guarantee the purpose of vibration screening in the front half of the product, introducing certain quality risks, and resulting in low assembly efficiency.

[0004] To avoid adjusting the connecting ring within a large circumferential angle range and to control the workpiece assembly within a small circumferential adjustment range to ensure the consistency of the spatial angles of the two reference features, this invention provides a method and apparatus for ensuring the consistency of the references of threaded connection workpieces.

[0005] Patent document CN206037876 discloses a fixed-start-point thread detection device, which includes a fixed-start-point external thread detection device and a fixed-start-point internal thread detection device. The outer circle of the positioning step of the thread template of the fixed-start-point internal thread detection device is provided with a scribing cutting edge, which coincides with the scribing cutting edge of the scribing template of the fixed-start-point external thread detection device. The other end face of the thread template serves as a reference surface, and the thread start point of the thread template coincides with the thread start point of the thread start-point sample ring of the fixed-start-point external thread detection device. However, the technology disclosed in this patent document still has the drawbacks of requiring control of the thread start point, making it difficult to operate in actual processing; and the lack of torque control during thread detection makes it difficult to guarantee the relative position of the two workpiece references after assembly. Summary of the Invention

[0006] To address the problems mentioned above, this invention provides a device and method for ensuring consistency of reference datum in threaded connections. The technical solution is as follows:

[0007] A device for ensuring consistency of reference datum in threaded connections is characterized in that the threaded connections are workpieces A1 and B4 connected together by threads to form an assembly. The device includes an inspection ring gauge 7, an inspection plug gauge 9, a standard workpiece A11, a standard workpiece B13, and a torque wrench 21. Workpiece A1 has structure A and an external thread A3 at one end; workpiece B4 has structure B and an internal thread B6 at one end. The standard workpiece A11 is a standard mother plate workpiece manufactured according to workpiece A1; the standard workpiece B13 is a standard mother plate workpiece manufactured according to the drawing requirements of workpiece B4; the inspection ring gauge 7 is a special scribing and inspection tool for scribing and inspecting the external thread A3 of workpiece A1; the inspection plug gauge 9 is a special scribing and inspection tool for scribing and inspecting the internal thread B6 of workpiece B4; the torque wrench 21 is used to control the torque during workpiece assembly; the standard workpiece A11 and standard workpiece B13 are connected to provide a machining reference line.

[0008] Furthermore, the inspection ring gauge 7 has an internal thread 8 for scribing and inspecting the external thread A3 on the workpiece A1.

[0009] Furthermore, the inspection plug gauge 9 has an external thread 10 for scribing and inspecting the internal thread B6 on the workpiece B4.

[0010] Furthermore, structure A is window 2, and structure B is boss 5.

[0011] Furthermore, the machining of the standard workpiece A11 is limited to the standard external thread 12 at one end and the outer circle of workpiece A1;

[0012] Furthermore, the machining of the standard workpiece B13 is limited to the standard internal thread 14 at one end and the outer circle of workpiece B4.

[0013] The present invention also provides a method for ensuring consistency of reference datum in threaded connection workpieces, characterized in that it uses the aforementioned device for ensuring consistency of reference datum in threaded connection workpieces, the method comprising:

[0014] Step 1: Use torque wrench 21 to screw together standard workpiece A11 and standard workpiece B13 with a certain torque M to form a workpiece assembly. Then, draw a continuous reference line on any generatrix of the entire workpiece assembly.

[0015] Step 2: Unscrew standard workpiece A11 and standard workpiece B13 and separate them. Using torque wrench 21, screw the corresponding special scribing inspection fixture into both ends of each standard mother plate workpiece with the same torque M. Finally, transfer the datum line on each standard mother plate workpiece to the corresponding special scribing inspection fixture.

[0016] Step 3: During the machining of workpiece A1, the external thread A3 is machined normally. Then, the torque wrench 21 is used to engage the inspection ring gauge 7 with torque M. The ring gauge reference line 17 on the inspection ring gauge 7 is transferred to the outer circle of workpiece A1 to obtain the reference line A19. The structure A on workpiece A1 is machined with the reference line A19 on the outer circle of workpiece A1 as the reference.

[0017] Step 4: During the machining of workpiece B4, after all features of workpiece B4 except for the internal thread B6 used for connection are machined, the center of structure B on the outer circle of workpiece B4 is transferred to its outer circle to form a reference line B20. Then, when machining the internal thread B6, the torque wrench 21 is used to engage the inspection plug gauge 9 with the workpiece B4 with torque M to ensure that the reference line B20 on workpiece B4 coincides with the plug gauge reference line 18 on the inspection plug gauge 9.

[0018] Step 5: During assembly, the external thread A3 of workpiece A1 and the internal thread B6 of workpiece B4 are engaged with torque M using torque wrench 21.

[0019] Furthermore, in step 1, the continuous reference line includes two parts: the standard reference line B15 on the standard workpiece B13 and the standard reference line A16 on the standard workpiece A11.

[0020] Furthermore, in step 2, the special scribing inspection fixture is an inspection ring gauge 7 and an inspection plug gauge 9, and the standard mother plate workpiece is a standard workpiece A11 and a standard workpiece B13. On one hand, the inspection ring gauge 7 is screwed into the standard workpiece A11 using the same torque M with a torque wrench 21, and the standard reference line A16 on the standard workpiece A11 is transferred to the inspection ring gauge 7 to obtain the ring gauge reference line 17. On the other hand, the inspection plug gauge 9 is screwed into the standard workpiece B13 using the same torque M with a torque wrench 21, and the standard reference line B15 on the standard workpiece B13 is transferred to the inspection plug gauge 9 to obtain the plug gauge reference line 18.

[0021] Furthermore, structure A is window 2, structure B is boss 5, in step 3, window 2 on workpiece A1 is machined with reference to reference to reference to reference to ensure that the axial symmetry axis of window 2 on workpiece A1 coincides with reference to ...

[0022] The technical solution provided by this invention has the following beneficial effects:

[0023] First, the present invention controls the consistency of thread processing of each workpiece by using a special scribing inspection fixture, ensuring that the thread feature points on the previous workpiece are transferred to the next workpiece, realizing the relative fixation and consistency of the feature positions of each workpiece after assembly, avoiding large circumferential angle adjustments, reducing assembly quality risks, and improving assembly efficiency.

[0024] Secondly, the special scribing inspection fixture proposed in this invention is portable, flexible, low-cost, and easy to replicate. When each workpiece is produced by different suppliers or different production lines, the corresponding number of special scribing inspection fixtures can be configured according to production needs, which significantly improves the flexibility and quality of each workpiece product production, enhances the scale and batch production capacity, and reduces the enterprise's production cost. Attached Figure Description

[0025] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the structure of the assembly of workpiece A and workpiece B provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of workpiece A provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of workpiece B provided in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the inspection ring gauge provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the inspection plug gauge provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of a standard workpiece A provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of a standard workpiece B provided in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of scribing standard workpiece A and standard workpiece B provided in an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of a standard workpiece A and a loop diagram provided in an embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the standard workpiece B and the plug line provided in an embodiment of the present invention;

[0036] Figure 11 A dedicated torque wrench provided for embodiments of the present invention;

[0037] Figure 12 A flowchart illustrating a method for ensuring consistency of reference datum in threaded connections, provided in an embodiment of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] Workpiece A1; Window 2; External Thread A3; Workpiece B 4; Boss 5; Internal Thread B6; Inspection Ring Gauge 7; Internal Thread 8; Inspection Plug Gauge 9; External Thread 10; Standard Workpiece A 11; Standard External Thread 12; Standard Workpiece B 13; Standard Internal Thread 14; Standard Reference Line B 15; Standard Reference Line A 16; Ring Gauge Reference Line 17; Plug Gauge Reference Line 18; Reference Line A 19; Reference Line B 20; Torque Wrench 21. Detailed Implementation

[0040] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0041] This embodiment provides a device to ensure that the reference datum of threaded connection workpieces is consistent. For example... Figures 1-10 As shown, the device includes: an inspection ring gauge 7, an inspection plug gauge 9, a standard workpiece A11, a standard workpiece B13, and a torque wrench 21. The torque wrench 21 is used to control the torque during workpiece assembly. The standard workpieces A11 and B13 are connected to provide a machining reference line.

[0042] Figure 1 This is a schematic diagram of the structure of the assembly of workpiece A and workpiece B provided in an embodiment of the present invention. Figure 1 As shown, the threaded connection workpiece referred to in this invention is an assembly formed by workpiece A1 and workpiece B4 being connected together by threads. Workpiece A1 has a window 2 and a reference line A19, and workpiece B4 has a boss 5 and a reference line 20.

[0043] Figure 2 This is a schematic diagram of the structure of workpiece A provided in an embodiment of the present invention. Figure 2 As shown, workpiece A1 has a window 2 and an external thread A3 at one end.

[0044] Figure 3 This is a schematic diagram of the structure of workpiece B provided in an embodiment of the present invention. Figure 3 As shown, workpiece B4 has a boss 5 and an internal thread B6 at one end.

[0045] Figure 4 This is a schematic diagram of the structure of the inspection ring gauge provided in an embodiment of the present invention. The inspection ring gauge 7 is a dedicated scribing and inspection fixture for scribing and inspecting the external thread A3 of workpiece A1. Figure 4 As shown, the inspection ring gauge 7 has an internal thread 8, which is used for scribing and inspecting the external thread A3 on the workpiece A1.

[0046] Figure 5 This is a schematic diagram of the structure of an inspection plug gauge provided in an embodiment of the present invention. The inspection plug gauge 9 is a dedicated scribing and inspection fixture used for scribing and inspecting the internal thread B6 of workpiece B4. Figure 5 As shown, the inspection plug gauge 9 has an external thread 10, which is used for scribing and inspecting the internal thread B6 on the workpiece B4.

[0047] Figure 6 This is a schematic diagram of the structure of a standard workpiece A provided in an embodiment of the present invention. Figure 6 As shown, standard workpiece A11 is a standard mother plate workpiece manufactured according to the requirements of workpiece A1 drawing. Its machining content is only the standard external thread 12 at one end and the outer circle of workpiece A1. The standard workpiece A11 is used to provide and transmit the reference line for machining window 2 on workpiece A1.

[0048] Figure 7 This is a schematic diagram of the structure of a standard workpiece B provided in an embodiment of the present invention. Figure 7 As shown, standard workpiece B13 is a standard mother plate workpiece manufactured according to the requirements of workpiece B4 drawing. Its machining content is only the standard internal thread 14 at one end and the outer circle of workpiece B4. The standard workpiece B13 is used to provide and transmit the machining reference line of the internal thread 6 on workpiece B4.

[0049] Figure 11 A dedicated torque wrench provided for embodiments of the present invention; Figure 12 The flowchart of the method for ensuring consistency of reference datum in threaded connections provided by embodiments of the present invention is shown below. Figures 11-12 As shown in the figure, in this embodiment, a method for ensuring consistency of reference datum in threaded connection workpieces is provided, and the assembly process is as follows:

[0050] First, standard workpieces A11 and B13 are screwed together with a certain torque M using torque wrench 21 to form a workpiece assembly. Then, a continuous reference line is drawn on any generatrix of the entire workpiece assembly. Figure 8 This is a schematic diagram illustrating the scribing of standard workpiece A and standard workpiece B according to an embodiment of the present invention. Figure 8 As shown, the continuous reference line includes two parts: the standard reference line B15 on the standard workpiece B13 and the standard reference line A16 on the standard workpiece A11.

[0051] Next, standard workpieces A11 and B13 are unscrewed and separated. Using torque wrench 21 and the same torque M, the corresponding special scribing inspection fixtures (inspection ring gauge 7 and inspection plug gauge 9) are screwed into both ends of each standard mother plate workpiece (standard workpiece A11 and standard workpiece B13). Finally, the reference lines on each standard mother plate workpiece are transferred to the corresponding special scribing inspection fixtures. Specifically, on the one hand, using torque wrench 21 and the same torque M, the inspection ring gauge 7 is screwed into standard workpiece A11. Figure 9 This is a schematic diagram of a standard workpiece A and a loop diagram provided in an embodiment of the present invention. Figure 9 As shown, the standard reference line A16 on the standard workpiece A11 is transferred to the inspection ring gauge 7 to obtain the ring gauge reference line 17. On the other hand, the inspection plug gauge 9 is screwed into the standard workpiece B13 using the same torque M with a torque wrench 21. Figure 10 This is a schematic diagram of the standard workpiece B and the plug line provided in an embodiment of the present invention. Figure 10 As shown, the standard reference line B15 on the standard workpiece B13 is transferred to the inspection plug gauge 9 to obtain the plug gauge reference line 18.

[0052] Next, the external thread A3 of workpiece A1 is inspected using inspection ring gauge 7 during machining. Specifically, during the machining of workpiece A1, the external thread A3 is machined normally, and then the inspection ring gauge 7 is engaged with torque M using torque wrench 21. The ring gauge reference line 17 on the inspection ring gauge 7 is transferred to the outer circle of workpiece A1 to obtain reference line A19. The window 2 on workpiece A1 is machined with reference line A19 on the outer circle of workpiece A1 as the reference, ensuring that the axial symmetry axis of window 2 on workpiece A1 coincides with reference line A19.

[0053] During the machining of the internal thread B6 of workpiece B4, the inspection plug gauge 9 is used for inspection. After all features of workpiece B4, except for the internal thread B6 used for connection, are machined, the center of the boss 5 on the outer circle of workpiece B4 is transferred to its outer circle to form a reference line B20. Then, when machining the internal thread B6, the inspection plug gauge 9 is engaged with workpiece B4 using a torque wrench 21 with a torque of M, ensuring that the reference line B20 on workpiece B4 coincides with the plug gauge reference line 18 on the inspection plug gauge 9.

[0054] Finally, during assembly, the external thread A3 of workpiece A1 and the internal thread B6 of workpiece B4 are engaged with a torque wrench 21 at a torque M, thereby achieving a fixed angle between the axial symmetry axis of the window 2 on workpiece A1 and the boss 5 on workpiece B4. Preferably, before assembly, the process further includes checking whether workpieces A1 and B4 meet the assembly requirements.

[0055] This invention uses a special scribing inspection tool, including a ring gauge and a plug gauge, to control the consistency of thread processing on two workpieces, A and B. This ensures that the thread feature points on workpiece A are transferred to workpiece B, thereby ensuring the relative fixation and consistency of the two feature positions on workpieces A and B. This avoids large circumferential angle adjustments, reduces assembly quality risks, and improves assembly efficiency.

[0056] This invention improves the consistency of assembly angles after threaded connection of each workpiece, ensuring that the thread feature points on the previous workpiece are transferred to the next workpiece. It can achieve relative fixation of feature positions and assembly consistency after assembly of each workpiece, reducing the product quality risk caused by excessive circumferential rotation angle during assembly. It has the characteristics of novel method, simple structure and easy operation.

[0057] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0058] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A method for ensuring consistency of reference datum in threaded connection workpieces, characterized in that, The threaded connection workpiece is workpiece A (1) and workpiece B (4) connected together by threads to form an assembly. The device used includes inspection ring gauge (7), inspection plug gauge (9), standard workpiece A (11), standard workpiece B (13), and torque wrench (21). Workpiece A (1) has structure A and external thread A (3) at one end; workpiece B (4) has structure B and internal thread B (6) at one end; standard workpiece A (11) is a standard mother plate workpiece produced according to workpiece A (1); standard workpiece B (13) is a standard mother plate workpiece produced according to the drawing requirements of workpiece B (4); inspection ring gauge (7) is a special scribing inspection tool for scribing and inspecting the external thread A (3) of workpiece A (1); inspection plug gauge (9) is a special scribing inspection tool for scribing and inspecting the internal thread B (6) of workpiece B (4); torque wrench (21) is used to control the torque during workpiece assembly. The standard workpiece A (11) and standard workpiece B (13) are connected to provide a machining reference line; The method includes: Step 1: Using a torque wrench (21), standard workpiece A (11) and standard workpiece B (13) are screwed together with a certain torque M to form a workpiece assembly. Then, a continuous reference line is drawn on any generatrix of the entire workpiece assembly. Step 2: Unscrew standard workpiece A (11) and standard workpiece B (13) and separate them. Using the same torque M, screw the corresponding special scribing inspection fixture into both ends of each standard mother plate workpiece with a torque wrench (21). Finally, transfer the reference line on each standard mother plate workpiece to the corresponding special scribing inspection fixture. Step 3: During the machining of workpiece A (1), the external thread A (3) is machined normally. Then, the torque wrench (21) is used to engage the inspection ring gauge (7) with torque M. The ring gauge reference line (17) on the inspection ring gauge (7) is transferred to the outer circle of workpiece A (1) to obtain the reference line A (19). The structure A on workpiece A (1) is machined with the reference line A (19) on the outer circle of workpiece A (1) as the reference. Step 4: During the machining of workpiece B (4), after all features of workpiece B (4) except for the internal thread B (6) used for connection are machined, the center of structure B on the outer circle of workpiece B (4) is transferred to its outer circle to form a reference line B (20). Then, when machining the internal thread B (6), the torque wrench (21) is used to engage the inspection plug gauge (9) with the workpiece B (4) with the torque M to ensure that the reference line B (20) on workpiece B (4) coincides with the plug gauge reference line (18) on the inspection plug gauge (9). Step 5: During assembly, the external thread A (3) of workpiece A (1) and the internal thread B (6) of workpiece B (4) are engaged with torque M using a torque wrench (21).

2. The method for ensuring consistency of reference datum in threaded connections according to claim 1, characterized in that, The inspection ring gauge (7) has an internal thread (8) for scribing and inspecting the external thread A (3) on workpiece A (1).

3. The method for ensuring consistency of reference datum in threaded connections according to claim 1, characterized in that, The inspection plug gauge (9) has an external thread (10) for scribing and inspecting the internal thread B (6) on the workpiece B (4).

4. The method for ensuring consistency of reference datum in threaded connections according to claim 1, characterized in that, Structure A is a window (2), and structure B is a boss (5).

5. The method for ensuring consistency of reference datum in threaded connections according to claim 1, characterized in that, The machining of the standard workpiece A (11) is only the standard external thread (12) at one end and the outer circle of workpiece A (1).

6. The method for ensuring consistency of reference datum in threaded connections according to claim 1, characterized in that, The machining of the standard workpiece B (13) is only the standard internal thread (14) at one end and the outer circle of workpiece B (4).

7. The method for ensuring consistency of reference datum in threaded connections according to claim 1, characterized in that, In step 1, the continuous reference line includes two parts: the standard reference line B (15) on the standard workpiece B (13) and the standard reference line A (16) on the standard workpiece A (11).

8. The method for ensuring consistency of reference datum in threaded connections according to claim 7, characterized in that, In step 2, the special scribing inspection fixture is an inspection ring gauge (7) and an inspection plug gauge (9), and the standard mother plate workpiece is a standard workpiece A (11) and a standard workpiece B (13). On the one hand, the inspection ring gauge (7) is screwed into the standard workpiece A (11) using the same torque M with a torque wrench (21), and the standard reference line A (16) on the standard workpiece A (11) is transferred to the inspection ring gauge (7) to obtain the ring gauge reference line (17). On the other hand, the inspection plug gauge (9) is screwed into the standard workpiece B (13) using the same torque M with a torque wrench (21), and the standard reference line B (15) on the standard workpiece B (13) is transferred to the inspection plug gauge (9) to obtain the plug gauge reference line (18).

9. The method for ensuring consistency of reference datum in threaded connections according to claim 8, characterized in that, Structure A is a window (2), structure B is a boss (5). In step 3, the window (2) on workpiece A (1) is machined with reference line A (19) on the outer circle of workpiece A (1) as the reference, ensuring that the axial symmetry axis of the window (2) on workpiece A (1) coincides with the reference line A (19). In step 4, the center of the boss (5) on the outer circle of workpiece B (4) is transferred to its outer circle to form reference line B (20).

Images