Device and method for measuring the height from the rocker arm surface of an inlet rectifying blade with a ball table to the ball table

Abstract

The present invention discloses a device and method for measuring the height from the surface of an inlet rectifying blade rocker arm with a ball table to the ball table. The measuring device includes a base, a spring, a screw, a spindle, a pressure plate, and a nut. During measurement, the ball table of the rocker arm is inserted into the spindle, ensuring that the lower surface of the ball table of the rocker arm is in close contact with the stepped surface F of the spindle, and at the same time ensuring that the rocker arm surface is in close contact with the fitting surface B of the base. The pressure plate is passed through the spindle and placed on the upper surface of the ball table. The nut is screwed into the third spindle section with external threads on the spindle. The nut is tightened so that the pressing plane A of the pressure plate is in close contact with the upper surface of the ball table, completing the relative fixation of the rocker arm surface and the ball table. A feeler gauge is inserted into the gap between the pressing plane A and the rocker arm surface to determine whether the height h from the rocker arm surface to the ball table is within an acceptable range. The present invention is simple to operate, provides fast and accurate measurement results, and is easy to implement on-site.

Description

Technical Field

[0001] The invention belongs to the technical field of aero-engine processing, and in particular relates to a device and method for measuring the height between the surface of an inlet rectifying blade rocker arm with a ball table and the surface of the ball table during the processing and assembly of parts. Background Art

[0002] In the process of machining and assembling many parts of aircraft engines, imported straightening blade rocker arms with ball tables are often encountered. During the assembly process, the rocker arm surface is required to be ( Figure 1 A qualified product requires a height h between the rocker arm surface (a) or rocker arm surface (b) and the ball table surface to be within a certain range (between hmax and hmin). Because the ball table rotates freely relative to the rocker arm, and both the rocker arm and ball table surfaces are very small, on-site testing is difficult. Given these circumstances, a simple and easy-to-use measurement device and method are needed to meet these measurement requirements. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention aims to provide a device and method for measuring the height from the surface of the rocker arm of the inlet rectifier blade to the ball table with a ball table. The on-site measurement is fast and easy, the measurement results are reliable, and the measurement process is simple and easy to operate.

[0004] The present invention adopts the following technical solutions:

[0005] The device for measuring the height from the rocker arm surface of the inlet rectifier blade to the ball table includes:

[0006] A base, wherein the base includes a stepped hole extending through both end surfaces thereof, a threaded hole is formed on one side surface of the base, and one end surface of the base forms a fitting surface B;

[0007] A mandrel, wherein the mandrel is movably inserted into the stepped hole of the base, the maximum outer diameter of the mandrel is larger than the minimum aperture of the stepped hole, and the mandrel includes at least one stepped surface F, and a first mandrel segment, a second mandrel segment, and a third mandrel segment with different outer diameters, wherein:

[0008] A spring is sleeved on the outer surface of the first mandrel segment, one end of the spring is in close contact with the end surface of the second mandrel segment, and the other end is in close contact with the inner wall of the step hole on the base;

[0009] The surface of the second mandrel segment is provided with a hollow knife groove C;

[0010] The surface of the third mandrel segment is provided with external threads;

[0011] The step surface F is between the second mandrel segment and the third mandrel segment and is located in the step hole;

[0012] A screw passing through a threaded hole on a side surface of the base and extending into the empty knife groove C;

[0013] A pressing plate, which is sleeved on the mandrel and has a pressing plane A;

[0014] A nut is threadedly connected to the third spindle segment.

[0015] As an option, the measuring device further comprises a feeler gauge, the thickness of the feeler gauge including a maximum distance hmax and a minimum distance hmin from the surface of the rocker arm to the surface of the table allowed in the design drawing.

[0016] The method for measuring the height from the surface of the rocker arm of the inlet rectifier blade with the ball table to the ball table using the above-mentioned measuring device comprises the following steps:

[0017] Step 1: Insert the ball base of the rocker arm into the spindle, making sure that the lower surface of the ball base of the rocker arm is in close contact with the stepped surface F of the spindle, and that the surface of the rocker arm is in close contact with the fitting surface B of the base;

[0018] Step 2: Pass the pressure plate through the spindle and place it on the upper surface of the ball table. Screw the nut into the third spindle section with external threads on the spindle. Tighten the nut so that the pressing surface A of the pressure plate is in close contact with the upper surface of the ball table, completing the relative fixation of the rocker arm surface and the ball table.

[0019] Step 3: Use two feeler gauges with thicknesses equal to the maximum distance hmax and minimum distance hmin allowed from the rocker arm surface to the ball table surface in the design drawing to insert them into the gap between the clamping plane A and the rocker arm surface, and then judge whether the height h from the rocker arm surface to the ball table is within the qualified range including the maximum distance hmax and the minimum distance hmin.

[0020] Furthermore, the measuring method further comprises,

[0021] Step 4: Remove the nut, take out the pressure plate, remove the rocker arm from the spindle, flip the rocker arm over and repeat steps 1 to 3 to determine whether the height h from the other surface of the rocker arm to the ball table is qualified.

[0022] As an option, in step 3, feeler gauges of different thicknesses are used to accurately measure the actual distance h from the rocker arm surface to the table surface.

[0023] Compared with the prior art, the present invention provides a device for measuring the height distance h between the rocker arm surface and the ball table surface of an inlet rectifying blade with a ball table, and the device has the following characteristics:

[0024] (1) The measuring device can fix the table without rotating, so that the height distance h can be judged by using feeler gauges with thicknesses of hmax and hmin respectively. Furthermore, the actual height can be measured by using feeler gauges of different thicknesses.

[0025] (2) When the part rocker arm is flipped up and down, the same method can be used to measure the height distance h in the other direction.

[0026] (3) The measurement method of the present invention is very simple to operate on the production site, convenient and reliable, and can quickly determine whether the height distance h of the product is qualified, greatly improving work efficiency. The measurement concept of the present invention can also be used to measure distances in other similar structures or fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the front view of the measuring device;

[0028] In the figure, 1. Base; 2. Spring; 3. Screw; 4. Spindle; 5. Pressure plate; 6. Nut. DETAILED DESCRIPTION

[0029] The present invention is further described below with reference to the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0030] like Figure 1 As shown, the measuring device includes a base 1, a spring 2, a screw 3, a spindle 4, a pressure plate 5 and a nut 6.

[0031] Inside the base 1, there is a stepped hole that runs through it from top to bottom (i.e., it runs through the upper and lower end surfaces of the base 1). The spindle 4 is a stepped shaft with a threaded upper end, which is assembled in the stepped hole of the base 1. The portion of the spindle 4 located in the stepped hole is also sheathed with a spring 2 on the outside. The ends of the spring 2 are respectively in close contact with the spindle 4 and the stepped hole wall of the base 1. The spring 2 allows the spindle 4 to move up and down in the stepped hole of the base 1. After installation, the fitting surface B on the base 1 must be higher than the stepped surface F of the spindle 4 to ensure that the lower surface of the rocker arm can properly fit on the fitting surface B during measurement. A screw 3 is installed on the side of the base 1. Tightening the screw 3 allows the head to screw into the empty knife groove C on the side of the spindle 4, ensuring that the spindle 4 does not fall off when moving up and down and does not rotate in the stepped hole.

[0032] During measurement, insert the rocker arm into the spindle 4, place the lower surface of the rocker arm ball table on the step surface F of the spindle 4, and make the rocker arm surface b close to the fitting surface B of the base 1, then pass the pressure plate 5 through the spindle 4 and place it on the upper surface of the ball table, screw the nut 6 into the upper end of the spindle 4 (with a threaded section), and gently tighten the nut 6 so that the pressing plane A of the pressure plate 5 is attached to the upper surface of the ball table. In this way, the rocker arm and the ball table are fixed, and a feeler gauge can be used to determine whether the height distance h is within the qualified range.

[0033] If you need to measure the height difference of the rocker arm in another direction (i.e. the distance h from the rocker arm surface a to the table surface), loosen the nut 6, remove the pressure plate 5, turn the rocker arm upside down, and continue to use the same measuring device to repeat the above steps to measure the height difference in the other direction.

[0034] The measuring method of the present invention is very simple, convenient and reliable to operate at the production site, and can quickly judge whether a product is qualified or not, thereby greatly improving work efficiency.

[0035] Any matters not described in detail in the present specification are prior art known to those skilled in the art. Although the above description of the present invention is based on illustrative embodiments to facilitate understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the specific embodiments. As long as various modifications are within the spirit and scope of the present invention as defined and determined by the appended claims, such modifications will be obvious to those skilled in the art, and all inventions and creations utilizing the concepts of the present invention are protected.

Claims

1. A device for measuring the height from the rocker arm surface of an inlet rectifier blade with a ball table to the ball table, characterized by: include, A base (1), wherein the base (1) comprises a stepped hole penetrating through its two end surfaces, a threaded hole is formed on a side surface of the base (1), and an upper end surface of the base (1) forms a fitting surface B; A spindle (4) is movably inserted into the stepped hole of the base (1), the maximum outer diameter of the spindle (4) is larger than the minimum aperture of the stepped hole, and the spindle (4) includes at least one stepped surface F, and a first spindle segment, a second spindle segment, and a third spindle segment having different outer diameters and arranged from bottom to top, wherein: A spring (2) is sleeved on the outer surface of the first spindle segment, one end of the spring (2) is in close contact with the end surface of the second spindle segment, and the other end is in close contact with the inner wall of the step hole on the base (1); The surface of the second mandrel segment is provided with a hollow knife groove C; The surface of the third mandrel segment is provided with external threads; The step surface F is between the second mandrel segment and the third mandrel segment and is located in the step hole; A screw (3), the screw (3) passing through a threaded hole on a side surface of the base (1) and extending into the empty knife groove C; A pressing plate (5), wherein the pressing plate (5) is sleeved on the third spindle section of the spindle (4), and a pressing plane A is provided on the pressing plate (5); The nut (6) is threadedly connected to the third spindle segment so that the pressing plane A of the pressing plate (5) is in close contact with the upper surface of the ball table.

2. The measuring device according to claim 1, characterized in that: A feeler gauge is also included, wherein the thickness of the feeler gauge includes the maximum distance hmax and the minimum distance hmin from the rocker arm surface to the table surface allowed in the design drawing.

3. A measurement method, using the measurement device according to claim 1, characterized in that: The following steps are involved: Step 1: Insert the ball table of the rocker arm into the spindle (4), ensuring that the lower surface of the ball table of the rocker arm is in close contact with the step surface F of the spindle (4), and at the same time ensuring that the surface of the rocker arm is in close contact with the fitting surface B of the base (1); Step 2: Pass the pressure plate (5) through the spindle (4) and place it on the upper surface of the ball table. Screw the nut (6) into the third spindle section with external threads on the spindle (4). Tighten the nut (6) so that the pressing plane A of the pressure plate (5) is in close contact with the upper surface of the ball table, thereby completing the relative fixation of the rocker arm surface and the ball table. Step 3: Use two feeler gauges with thicknesses equal to the maximum distance hmax and minimum distance hmin allowed from the rocker arm surface to the ball table surface in the design drawing to insert them into the gap between the clamping plane A and the rocker arm surface, and then judge whether the height h from the rocker arm surface to the ball table is within the qualified range including the maximum distance hmax and the minimum distance hmin.

4. The measuring method according to claim 3, wherein: Also includes, Step 4, remove the nut (6), take out the pressure plate (5), remove the rocker arm from the spindle (4), flip the rocker arm over and repeat steps 1 to 3 to determine whether the height h from the other surface of the rocker arm to the ball table is qualified.

5. The measurement method according to claim 3, wherein: In step 3, feeler gauges of different thicknesses are used to accurately measure the actual distance h from the rocker arm surface to the table surface.

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