CN215864960U

CN215864960U - HP3 camshaft diameter of axle rapid survey measuring tool

Info

Publication number: CN215864960U
Application number: CN202121789104.7U
Authority: CN
Inventors: 毕师齐
Original assignee: Shanghai Denso Fuel Injection Co ltd
Current assignee: Shanghai Denso Fuel Injection Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-02-18
Anticipated expiration: 2031-08-03

Abstract

The utility model provides a HP3 camshaft diameter rapid measurement measuring tool, which comprises: the air micrometer, the measuring head, upper limit standard component and lower limit standard component. As shown in fig. 3, the measuring head has a groove for accommodating two ends of the HP3 camshaft, and three groups of measuring holes communicating the inside and the outside of the groove are formed on the measuring head and communicated with the air micrometer through a pipeline; the three sets of measuring holes are respectively positioned corresponding to a first measuring section, a second measuring section and a third measuring section in the HP3 camshaft. The upper limit standard has a measurement location dimension that is between the extreme and base dimensions of the HP3 camshaft. The upper limit standard has a measured position dimension between the lower extreme dimension and the base dimension of the HP3 camshaft. This device can judge fast whether the HP3 camshaft that the processing was accomplished meets the size requirement.

Description

HP3 camshaft diameter of axle rapid survey measuring tool

Technical Field

The utility model relates to a HP3 camshaft diameter rapid measuring tool.

Background

The diesel high-pressure common rail injection technology is the most advanced engine technology in the world at present, and the characteristics of low oil consumption and low exhaust emission are of great significance for improving the air environment at present. But the internal pressure of the pump reaches 1800Kg, so the part processing and detecting requirements are very strict, wherein the processing and detecting of the main part HP3 camshaft is particularly important. In the common rail part, the HP3 camshaft has the characteristics of slender size, high grinding precision requirement and the like. Wherein, the diameter of axle is detected among the turning process, generally need to dismantle the work piece after by artifical through the micrometer measure. However, in actual production, the daily output is large, and continuous operation of operators is easy to cause fatigue, so that inaccurate measurement is caused. In addition, the micrometer has limited precision and is greatly influenced by human factors, and the reading accuracy is difficult to ensure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defect of poor reliability of the measurement accuracy of the shaft diameter of the HP3 camshaft in the prior art, and provides a HP3 camshaft shaft diameter rapid measurement measuring tool capable of solving the problem.

The utility model solves the technical problems through the following technical scheme:

an HP3 camshaft shaft diameter rapid measuring tool, the HP3 camshaft has a first measuring section, a second measuring section and a third measuring section along the axial direction, characterized in that, the HP3 camshaft shaft diameter rapid measuring tool comprises:

an air micrometer;

the measuring head is provided with a groove for accommodating the two ends of the HP3 camshaft, three groups of measuring holes communicated with the inside and the outside of the groove are formed in the measuring head, and the three groups of measuring holes are communicated with the air micrometer through pipelines; the positions of the three groups of measuring holes respectively correspond to the first measuring section, the second measuring section and the third measuring section in the HP3 camshaft;

an upper limit standard having a measurement location dimension between the extreme and base dimensions of the HP3 camshaft;

a lower limit criterion having a measured position dimension between a lower extreme dimension and a base dimension of the HP3 camshaft.

Preferably, one end of the groove of the measuring head is provided with a limiting block, and the limiting block is used for abutting against the end part of the piece to be measured.

Preferably, the number of the measuring holes in each group is a plurality of pairs, and the plurality of pairs of the measuring holes are arranged along the radial direction.

Preferably, the HP3 camshaft diameter rapid measurement measuring tool further comprises a soft object placing table, and the soft object placing table is provided with two accommodating grooves for accommodating the lower limit standard component and the upper limit standard component.

Preferably, the material of the measuring head is T10 tool steel.

Preferably, the material of the upper limit standard component is T10 tool steel.

Preferably, the material of the lower limit standard component is T10 tool steel.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the utility model.

The positive progress effects of the utility model are as follows: the measuring tool can determine the upper limit size display position and the lower limit size display position according to the sizes of the upper limit standard part and the lower limit standard part, so that whether the size of the HP3 camshaft is between the upper limit size display position and the lower limit size display position is quickly detected, and whether the machined HP3 camshaft meets the size requirement is finally judged.

Drawings

FIG. 1 is a schematic structural view of an HP3 camshaft in a preferred embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a HP3 camshaft diameter rapid measuring tool in a preferred embodiment of the present invention.

FIG. 3 is a top view of a measuring head in a preferred embodiment of the present invention.

Fig. 4 is a schematic sectional view along the direction a-a in fig. 3.

Description of reference numerals:

HP3 camshaft 100

First measuring section 110

Second measurement section 120

Third measuring section 130

Air micrometer 200

Measuring head 300

Groove 310

Measuring orifice 320

Limiting block 330

Upper limit standard 400

Lower limit standard 500

Soft object placing table 600

Accommodation groove 610

Detailed Description

The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings.

FIG. 1 illustrates an HP3 camshaft 100, the HP3 camshaft 100 having a first measuring section 110, a second measuring section 120, and a third measuring section 130 in an axial direction. FIG. 2 shows a HP3 camshaft diameter rapid measuring tool, and the HP3 camshaft diameter rapid measuring tool comprises: an air micrometer 200, a measuring head 300, an upper limit standard 400 and a lower limit standard 500. As shown in fig. 3 and 4, the measuring head 300 has a through groove 310 for receiving the two ends of the HP3 camshaft 100, the measuring head 300 has three sets of measuring holes 320 communicating the inside and outside of the groove 310, and the three sets of measuring holes 320 are communicated with the air micrometer 200 through pipes; the three sets of measuring holes 320 are located to correspond to the first measuring section 110, the second measuring section 120, and the third measuring section 130 of the HP3 camshaft 100, respectively. The upper limit standard 400 has a measurement location dimension that is between the extreme and base dimensions of the HP3 camshaft 100. The measured position dimension of the lower limit standard 500 is located between the lower extreme dimension and the basic dimension of the HP3 camshaft 100.

When the device is used for detecting the HP3 camshaft 100, the upper limit standard 400 and the lower limit standard 500 are firstly used for calibration before the camshaft is machined. The upper limit standard part 400 and the lower limit standard part 500 are sequentially placed in the groove 310 of the measuring head 300, the air micrometer 200 is started, the radial positions of the upper limit standard part 400 and the lower limit standard part 500 are rotated in the measuring process to ensure accurate reading, zero adjustment is carried out according to the actual values of the upper limit standard part 400 and the lower limit standard part 500, then the upper limit standard part 400 and the lower limit standard part 500 are taken down, and at the moment, 2 red lines in total appear on the dial plate of the air micrometer 200 to represent the upper limit deviation and the lower limit deviation of a workpiece. After the HP3 camshaft 100 is machined, the HP3 camshaft 100 is placed in the groove 310 of the measuring head 300, the HP3 camshaft 100 is rotated to ensure accurate readings, after a green strip representing the actual size of the workpiece is stabilized, whether the top end of the green strip is in two red lines is observed, and the workpiece is taken down after the readings are recorded. If the green bar tip of a given shaft segment is within two red lines, the segment size of the HP3 camshaft 100 is consistent with the size requirements. If the green bar tip of a given shaft segment is outside of two red lines, this indicates that the segment of the HP3 camshaft 100 is not dimensionally compliant.

In order to facilitate the positioning of the HP3 camshaft 100 in the groove 310 and ensure that the three sets of measuring holes 320 are accurately aligned with the first measuring section 110, the second measuring section 120 and the third measuring section 130 of the HP3 camshaft 100, one end of the groove 310 of the measuring head 300 is provided with a limiting block 330, and the limiting block 330 is used for abutting against the ends of the HP3 camshaft 100, the upper limit standard 400 and the lower limit standard 500.

In the present embodiment, the number of the measurement holes 320 in each group is plural, and the plural pairs of measurement holes 320 are arranged in the radial direction. Multiple pairs of measurement holes 320 can be used to measure different positions of a certain shaft section, thereby further improving the accuracy of the measurement.

In order to avoid the dimensional accuracy of the HP3 camshaft diameter rapid measuring tool from varying due to the contact between the lower limit standard 500 and the upper limit standard 400 and the hard object, the HP3 camshaft diameter rapid measuring tool further comprises a soft object placing table 600, and the soft object placing table 600 has two accommodating grooves 610 for accommodating the lower limit standard 500 and the upper limit standard 400.

The measuring head 300, the upper limit gauge 400, and the lower limit gauge 500 are made of T10 tool steel. The T10 tool steel has the characteristics of high strength and wear resistance degree and low production cost.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.

Claims

1. An HP3 camshaft shaft diameter rapid measuring tool, the HP3 camshaft having a first measuring section, a second measuring section and a third measuring section along the axial direction, the HP3 camshaft shaft diameter rapid measuring tool comprises:

an air micrometer;

2. The HP3 camshaft diameter rapid measuring tool according to claim 1, wherein the measuring head has a stopper at one end of the groove for abutting against an end of the member to be measured.

3. The HP3 camshaft diameter rapid measuring gauge of claim 1, wherein the number of measuring holes in each set is a plurality of pairs, the plurality of pairs being arranged in a radial direction.

4. The HP3 camshaft diameter fast measuring gauge according to claim 1, wherein the HP3 camshaft diameter fast measuring gauge further comprises a soft stage having two receiving slots for receiving the lower limit standard and the upper limit standard.

5. The HP3 camshaft diameter rapid measurement gauge according to claim 1, wherein the measuring head is made of T10 tool steel.

6. The HP3 camshaft diameter rapid measuring gauge of claim 1, wherein the upper limit standard is made of T10 tool steel.

7. The HP3 camshaft diameter rapid measuring gauge of claim 1, wherein the lower limit standard is made of T10 tool steel.