Verticality inspection tool and inspection method for threaded holes on the mounting surface of crankshaft balance block

Abstract

The present invention discloses a verticality inspection tool for threaded holes on the mounting surface of a crankshaft balance block, including a verticality gauge and a verticality inspection tool seat; the verticality gauge includes a handle, a dial indicator measuring disk, a transition section, a thread detection section and a guide section, and a dial indicator measuring area is provided on the outer edge of the dial indicator measuring disk; a detection through hole is provided in the center of the verticality inspection tool seat, and during calibration, the lower end of the verticality gauge extends into the detection through hole, and the thread detection section of the verticality gauge is screwed with the thread in the middle of the detection through hole. A detection method using a verticality inspection tool for threaded holes on the mounting surface of a crankshaft balance block includes the following steps: 1) calibrating the verticality gauge; 2) using the verticality gauge to detect the verticality of the threaded holes on the mounting surface of the crankshaft balance block. The present invention has a simple and compact structure, low cost, and convenient operation. It not only has high detection efficiency, but also accurate detection results and small errors, thereby ensuring the machining accuracy of the threaded holes on the mounting surface of the crankshaft balance block, thereby ensuring the overall performance of the crankshaft.

Description

Technical Field

[0001] The invention relates to a special detection tool and method for detecting the verticality of a threaded hole, in particular to a special detection tool and method for detecting the verticality of a threaded hole on a mounting surface of a diesel engine crankshaft balance block, belonging to the technical field of form and position tolerance detection tools. Background Art

[0002] The crankshaft is a key part of a diesel engine, and its quality directly affects the overall performance of the diesel engine. Since the forces acting on the crankshaft are intermittent and unbalanced, a balance block is often installed on the crankshaft to ensure that these forces are transmitted smoothly. The machining accuracy of the threaded holes on the mounting surface of the crankshaft balance block directly affects the stability of the crankshaft operation, especially its verticality relative to the mounting surface must meet the requirements of the drawings. Therefore, the verticality of the threaded holes on the mounting surface of the crankshaft balance block must be strictly controlled and strictly inspected one by one. At present, the verticality detection of the above-mentioned threaded holes mainly relies on self-inspection of machining equipment, but because the diesel engine crankshaft balance block is connected to the crankshaft by threads, the threaded holes cannot be detected by the above method. Summary of the invention

[0003] The purpose of the present invention is to provide a verticality inspection tool and inspection method for threaded holes on the mounting surface of a crankshaft balance block, which is simple in structure, easy to use and has high inspection accuracy.

[0004] The present invention is achieved through the following technical solutions:

[0005] A verticality inspection tool for a threaded hole on a crankshaft balance block mounting surface comprises a verticality gauge and a verticality inspection tool seat; the verticality gauge is an integral hollow structure, and comprises a handle, a dial indicator measuring disk, a transition section, a thread detection section and a guide section from top to bottom, and a dial indicator measuring area is provided on the outer edge of the dial indicator measuring disk; a detection through hole is provided at the center of the verticality inspection tool seat, and during calibration, the lower end of the verticality gauge extends into the detection through hole, and the thread detection section of the verticality gauge is screwed into the thread in the middle of the detection through hole.

[0006] The purpose of the present invention can be further achieved by the following technical measures.

[0007] The verticality inspection tool for the threaded hole on the crankshaft balance block mounting surface, wherein the upper and lower sections of the detection through hole are both light holes, and a thread is provided in the middle of the detection through hole.

[0008] The aforementioned verticality inspection tool for the threaded hole on the crankshaft balance block mounting surface, wherein the runout tolerance of the dial indicator measuring area is less than 0.01, and the verticality of the dial indicator measuring area within each 100mm length section relative to the thread detection section is less than 0.02.

[0009] The verticality inspection tool for the threaded hole on the crankshaft balance block mounting surface has a verticality of less than Φ0.02 within every 100mm length section between the threaded section in the middle of the through hole and the bottom surface of the verticality inspection tool seat.

[0010] The verticality inspection tool for the threaded hole on the crankshaft balance block mounting surface, wherein the parallelism between the top surface and the bottom surface of the verticality inspection tool seat is less than 0.01.

[0011] A method for detecting the verticality of a threaded hole on a crankshaft balance block mounting surface using a verticality inspection tool comprises the following steps:

[0012] 1) Check the verticality gauge: Hold the handle of the verticality gauge, screw the thread detection section of the verticality gauge into the verticality gauge seat, place the verticality gauge seat on a horizontal workbench, install a dial indicator on the height gauge and adjust it to an appropriate position, move the height gauge so that the pointer of the dial indicator contacts the dial indicator measurement area of ​​the verticality gauge, measure multiple times, and record the readings to ensure that the difference in the dial indicator readings is less than the specified value;

[0013] 2) Use the verticality gauge to check the verticality of the threaded hole on the mounting surface of the crankshaft balance block: place the crankshaft on a horizontal workbench, hold the handle of the verticality gauge, screw the thread detection section of the verticality gauge into the threaded hole on the mounting surface of the crankshaft balance block, then install the dial indicator on the height gauge and adjust it to the appropriate position, move the height gauge, level and align the mounting surface of the crankshaft balance block, ensure that the parallelism between the mounting surface of the crankshaft balance block and the horizontal workbench is less than the specified value, press the dial indicator to the dial indicator measurement area of ​​the verticality gauge, measure relative to each other multiple times, and record the readings of the dial indicator. If the difference between the maximum and minimum values ​​of the dial indicator readings is less than the specified value, the verticality of the threaded hole on the mounting surface of the crankshaft balance block meets the requirements of the drawing.

[0014] The present invention has a simple and compact structure, low cost, and easy operation, and can quickly complete the verticality detection of the threaded holes on the crankshaft balance block mounting surface. It not only has high detection efficiency, but also has accurate detection results and small detection errors, thereby ensuring the processing accuracy of the threaded holes on the crankshaft balance block mounting surface, thereby ensuring the overall performance of the crankshaft.

[0015] Advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the present invention in use state. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1 As shown, the present invention includes a verticality gauge 1 and a verticality gauge seat 2. The verticality gauge 1 is an integral hollow structure, and includes, from top to bottom, a handle 11 with a knurled surface, a dial indicator measuring disk 12, a transition section 13, a thread detection section 14, and a guide section 15. A dial indicator measuring area 121 is provided on the outer edge of the dial indicator measuring disk 12. The runout tolerance of the dial indicator measuring area 121 is less than 0.01, and the verticality of the dial indicator measuring area relative to the thread detection section within every 100mm length section is less than 0.02. The thread of the thread detection section 14 is made according to the standard tolerance of the through gauge, and the end face of the guide section 15 is provided with a large chamfer for easy guidance. A detection through hole 21 is provided at the center of the verticality gauge seat 2. The upper and lower sections of the detection through hole 21 are both light holes. A thread is provided in the middle of the detection through hole 21. The thread is made according to the standard tolerance of the through gauge. The verticality of the thread section in the middle of the detection through hole and the bottom surface of the verticality gauge seat within each 100mm length section is less than Φ0.02. During calibration, the lower end of the verticality gauge 1 extends into the detection through hole 21, and the thread detection section 14 of the verticality gauge 1 is screwed with the thread in the middle of the detection through hole 21. The parallelism between the top and bottom surfaces of the verticality gauge seat 2 is less than 0.01.

[0020] like Figure 2 As shown, a method for detecting the verticality of a threaded hole on a crankshaft balance block mounting surface using a verticality inspection fixture comprises the following steps:

[0021] 1) Check the verticality gauge 1: Hold the handle 11 of the verticality gauge 1, screw the thread detection section 14 of the verticality gauge 1 into the verticality gauge seat 2, place the verticality gauge seat 2 on the horizontal workbench 3, and install the dial indicator 5 on the height gauge 4 and adjust it to an appropriate position. Move the height gauge 4 so that the pointer of the dial indicator 5 contacts the dial indicator measuring area 121 of the verticality gauge 1, measure multiple times, and record the readings to ensure that the reading difference of the dial indicator 5 is less than 0.02;

[0022] 2) Use the verticality gauge 1 to detect the verticality of the threaded hole on the mounting surface of the crankshaft balancing block: support the crankshaft 6 on the horizontal workbench 3, hold the handle 11 of the verticality gauge 1, screw the thread detection section 14 of the verticality gauge 1 into the threaded hole 61 on the mounting surface of the crankshaft balancing block, then install the dial indicator 5 on the height gauge 4 and adjust it to the appropriate position, move the height gauge 4, level and align the mounting surface of the crankshaft balancing block, ensure that the parallelism between the mounting surface of the crankshaft balancing block and the horizontal workbench 3 is less than 0.02, press the dial indicator 5 to the dial indicator measuring area 121 of the verticality gauge 1, measure relative to each other for multiple times, and record the readings of the dial indicator 5. If the difference between the maximum and minimum readings of the dial indicator 5 is less than 0.2, the verticality of the threaded hole 61 on the mounting surface of the crankshaft balancing block meets the requirements of the drawing.

[0023] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A method for detecting a verticality gauge of a threaded hole on a crankshaft balancing block mounting surface, wherein the verticality gauge of the threaded hole on the crankshaft balancing block mounting surface comprises a verticality gauge and a verticality gauge seat; the verticality gauge is an integral hollow structure, and comprises a handle, a dial indicator measuring disk, a transition section, a thread detection section and a guide section from top to bottom, and a dial indicator measuring area is provided on the outer edge of the dial indicator measuring disk; a detection through hole is provided at the center of the verticality gauge seat, and during calibration, the lower end of the verticality gauge extends into the detection through hole, and the thread detection section of the verticality gauge is screwed with the thread in the middle of the detection through hole; the characteristics are as follows: The following steps are involved: 1) Check the verticality gauge: Hold the handle of the verticality gauge, screw the thread detection section of the verticality gauge into the verticality gauge seat, place the verticality gauge seat on a horizontal workbench, install a dial indicator on the height gauge and adjust it to an appropriate position, move the height gauge so that the pointer of the dial indicator contacts the dial indicator measurement area of ​​the verticality gauge, measure multiple times, and record the readings to ensure that the difference in the dial indicator readings is less than the specified value; 2) Use the verticality gauge to check the verticality of the threaded hole on the mounting surface of the crankshaft balance block: place the crankshaft on a horizontal workbench, hold the handle of the verticality gauge, screw the thread detection section of the verticality gauge into the threaded hole on the mounting surface of the crankshaft balance block, then install the dial indicator on the height gauge and adjust it to the appropriate position, move the height gauge, level and align the mounting surface of the crankshaft balance block, ensure that the parallelism between the mounting surface of the crankshaft balance block and the horizontal workbench is less than the specified value, press the dial indicator to the dial indicator measurement area of ​​the verticality gauge, measure relative to each other multiple times, and record the readings of the dial indicator. If the difference between the maximum and minimum values ​​of the dial indicator readings is less than the specified value, the verticality of the threaded hole on the mounting surface of the crankshaft balance block meets the requirements of the drawing.

2. The method for detecting the verticality of the threaded hole on the crankshaft balance block mounting surface according to claim 1, characterized in that: The upper and lower sections of the detection through hole are both light holes, and a thread is arranged in the middle of the detection through hole.

3. The method for detecting the verticality of the threaded hole on the crankshaft balance block mounting surface according to claim 1, characterized in that: The runout tolerance of the dial indicator measuring area is less than 0.01, and the verticality of the dial indicator measuring area relative to the thread detection section within every 100mm length section is less than 0.

02.

4. The method for detecting the verticality of the threaded hole on the crankshaft balance block mounting surface according to claim 1, characterized in that: The verticality of the threaded section in the middle of the through hole and the bottom surface of the verticality inspection fixture seat in every 100mm length section is less than Φ0.

02.

5. The method for detecting the verticality of the threaded hole on the crankshaft balance block mounting surface according to claim 1, characterized in that: The parallelism between the top surface and the bottom surface of the verticality inspection fixture is less than 0.01.

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