A workpiece inner cone theoretical diameter drop gauge

Abstract

This utility model belongs to the technical field of mechanical parts inspection tools, and relates to a workpiece inner cone theoretical diameter difference gauge. It includes a base, a reference seat and a measuring frame on the base. The measuring frame includes a support column, a cylinder, a measuring frame pressure plate, and a guide positioning mandrel. The support column is mounted on the base, and the cylinder is mounted on the support column. The measuring frame pressure plate is connected to the cylinder via a universal joint. The guide positioning mandrel is located at the center of the measuring frame pressure plate. The outer diameter of the measuring frame pressure plate is the same as the theoretical outer diameter of the workpiece. The guide positioning mandrel has a conical guide surface adapted to the inner cone of the workpiece. This utility model, through precise structural design and positioning method, uses the workpiece reference surface as the positioning reference, uses the measuring frame pressure plate to locate the theoretical diameter of the workpiece's conical inner hole, and measures the distance from the circumference of this theoretical diameter to the end face of the reference seat using an indicator. This improves the stability and accuracy of the measurement, is easy to operate, and saves labor.

Description

Technical Field

[0001] This utility model relates to a workpiece inner cone theoretical diameter drop gauge, belonging to the technical field of mechanical parts inspection tools. Background Technology

[0002] In machining, it is often necessary to measure the distance from a specific diameter circumference on the conical surface of a workpiece to a reference surface, i.e., the theoretical diameter difference of the inner cone of the workpiece. Traditional measurement methods often suffer from problems such as inaccurate positioning, low measurement accuracy, poor stability, and cumbersome operation, making it difficult to meet the needs of high-precision measurement and affecting the efficiency and accuracy of product quality inspection. Therefore, a tool is needed that can improve measurement stability and accuracy while being easy to operate. Utility Model Content

[0003] The purpose of this utility model is to provide a workpiece inner cone theoretical diameter drop gauge to solve the problems of inaccurate positioning, low precision, poor stability and cumbersome operation in existing measurement methods.

[0004] The technical solution provided by this utility model is as follows: A workpiece inner cone theoretical diameter difference gauge includes a base, a reference seat and a measuring frame on the base, the measuring frame including a support column, a cylinder, a measuring frame pressure plate and a guide positioning mandrel, the support column being disposed on the base, the cylinder being disposed on the support column, the measuring frame pressure plate being connected to the cylinder through a universal joint, the guide positioning mandrel being disposed at the center of the measuring frame pressure plate, the outer diameter of the measuring frame pressure plate being the same as the theoretical outer diameter of the workpiece, the guide positioning mandrel being provided with a conical guide surface adapted to the inner cone of the workpiece, and the guide positioning mandrel being clearance-fitted with the inner hole of the reference seat.

[0005] Based on the above technical solution, the present invention can be further improved as follows:

[0006] Furthermore, the measuring frame pressure plate is equipped with an indicator, which is used to measure the drop of the theoretical inner cone diameter of the workpiece.

[0007] Furthermore, the flatness of the reference base is within 0.005mm, the coaxiality between the guide positioning mandrel and the outer circle of the measuring frame pressure plate is less than 0.005mm, and the perpendicularity between the inner hole of the reference base and the end face of the reference base is less than 0.01mm.

[0008] Furthermore, the test frame pressure plate is equipped with a balance block.

[0009] Furthermore, the cylinder is connected to a pressure reducing valve and a throttle valve, which are used to adjust the pressure and movement speed of the cylinder's measuring chamber.

[0010] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0011] 1. In this utility model, the front end of the measuring frame pressure plate has a tapered guide that closely matches the workpiece's taper, and the outer circle dimension of the measuring frame is precise, ensuring the accuracy and stability of the theoretical circle diameter for each positioning, thus improving the stability and precision of the measurement. The guide positioning mandrel at the center of the measuring frame pressure plate has high coaxiality with the outer circle and a clearance fit with the inner hole of the reference seat. The inner hole of the reference seat has high perpendicularity to the end face, ensuring that the outer circle of the measuring frame pressure plate is perpendicular to the end face of the reference seat, further guaranteeing the accuracy of the measurement and the stability of repeated measurements. The cylinder and the measuring frame pressure plate are connected by a universal joint, which not only enables the cylinder to drive the measuring frame pressure plate to move up and down, saving labor, but also ensures that the accurate positioning of the measuring frame pressure plate at the theoretical circle diameter is not affected by the cylinder rod movement deviation. Furthermore, the pressure and movement speed of the cylinder during measurement can be adjusted through a pressure reducing valve and a throttle valve, making the measurement process more stable.

[0012] 2. This utility model, through precise structural design and positioning method, uses the workpiece reference surface as the positioning reference, uses the measuring frame pressure plate to position the theoretical circle diameter of the workpiece's conical inner hole, and uses an indicator to measure the distance from the circumference of the theoretical circle diameter to the end face of the reference seat, which improves the stability and accuracy of the measurement, is easy to operate, and saves labor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0015] In the diagram, 1. Base; 2. Reference base; 3. Universal joint; 4. Support column; 5. Cylinder; 6. Measuring frame pressure plate; 7. Guide positioning mandrel; 8. Indicator; 9. Balance block; 10. Workpiece. Detailed Implementation

[0016] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0017] like Figure 1 and Figure 2As shown, a workpiece inner cone theoretical diameter difference gauge includes a base 1, on which a reference seat 2 and a measuring frame are mounted. The flatness of the reference seat 2 is within 0.005 mm, and the perpendicularity between the inner hole of the reference seat 2 and its end face is less than 0.01 mm. The measuring frame includes a support column 4, a cylinder 5, a measuring frame pressure plate 6, and a guide positioning mandrel 7. The support column 4 is mounted on the base 1, and the cylinder 5 is mounted on the support column 4. The measuring frame pressure plate 6 is connected to the cylinder 5 via a universal joint 3. The guide positioning mandrel 7 is located at the center of the measuring frame pressure plate 6, and the coaxiality between the guide positioning mandrel 7 and the outer circle of the measuring frame pressure plate 6 is less than 0.005 mm. The outer diameter of the measuring plate 6 is the same as the theoretical outer diameter of the workpiece 10. The guide positioning spindle 7 is provided with a conical guide that matches the inner cone of the workpiece 10. The guide positioning spindle 7 is clearance-fitted with the inner hole of the reference seat 2. The measuring plate 6 is provided with an indicator 8 and a balance block 9. The indicator 8 is used to measure the drop of the theoretical inner cone diameter of the workpiece 10. The balance block 9 is used to balance the weight of the measuring plate 6 during the movement, reduce vibration and improve measurement stability, thereby ensuring the accuracy of the measurement. The cylinder 5 is connected to a pressure reducing valve and a throttle valve. The pressure reducing valve and the throttle valve are used to adjust the pressure and movement speed of the measuring chamber of the cylinder 5. The cylinder 5 is controlled by a foot pedal.

[0018] This utility model requires calibration during use: Place the calibrated standard workpiece on the reference base 2, step on the foot switch once, the cylinder 5 drives the measuring frame pressure plate 6 to fall, and drives the guide positioning spindle 7 into the conical inner hole of the standard workpiece. After stabilization, adjust the indicator 8 and return it to zero. Step on the foot switch again once, the cylinder 5 drives the measuring frame pressure plate 6 to rise, remove the standard workpiece, and the measurement of the workpiece 10 to be measured can begin.

[0019] During measurement, place the workpiece 10 to be measured on the reference base 2, step on the foot switch once, the cylinder 5 drives the measuring frame pressure plate 6 to fall, and drives the guide positioning spindle 7 into the conical inner hole of the workpiece 10 to be measured. After stabilization, read the value from the indicator 8, step on the foot switch again once, the cylinder 5 drives the measuring frame pressure plate 6 to rise, remove the workpiece 10, and complete one measurement.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A workpiece inner cone theoretical diameter drop gauge, comprising a base (1), characterized in that, The base (1) is provided with a reference seat (2) and a measuring frame. The measuring frame includes a support column (4), a cylinder (5), a measuring frame pressure plate (6), and a guide positioning spindle (7). The support column (4) is set on the base (1), and the cylinder (5) is set on the support column (4). The measuring frame pressure plate (6) is connected to the cylinder (5) through a universal joint (3). The guide positioning spindle (7) is set at the center of the measuring frame pressure plate (6). The outer diameter of the measuring frame pressure plate (6) is the same as the theoretical outer diameter of the workpiece (10). The guide positioning spindle (7) is provided with a conical guide that is adapted to the inner cone of the workpiece (10). The guide positioning spindle (7) is clearance-fitted with the inner hole of the reference seat (2).

2. The workpiece inner cone theoretical diameter difference gauge according to claim 1, characterized in that, The measuring plate (6) is equipped with an indicator (8), which is used to measure the difference in the theoretical diameter of the inner cone of the workpiece (10).

3. The workpiece inner cone theoretical diameter difference gauge according to claim 1, characterized in that, The flatness of the reference base (2) is within 0.005mm, the coaxiality of the guide positioning spindle (7) and the outer circle of the measuring frame pressure plate (6) is less than 0.005mm, and the perpendicularity of the inner hole of the reference base (2) and the end face of the reference base (2) is less than 0.01mm.

4. The workpiece inner cone theoretical diameter difference gauge according to claim 1, characterized in that, The test frame pressure plate (6) is equipped with a balance block (9).

5. The workpiece inner cone theoretical diameter difference gauge according to claim 1, characterized in that, The cylinder (5) is connected to a pressure reducing valve and a throttle valve, which are used to adjust the pressure and movement speed of the measuring chamber of the cylinder (5).

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