Special-shaped inner cavity chamfering depth rapid measuring device

Abstract

The utility model discloses a device for rapidly measuring the chamfer depth of a special-shaped inner cavity, and relates to the technical field of automobile part processing. The stand column is fixedly installed in the middle of the base, a first observation face and a second observation face are arranged at the upper end of the stand column, and the first observation face is higher than the second observation face; the measuring head is coaxially and movably arranged on the outer side of the stand column in a sleeving mode, the measuring head comprises a hollow cylindrical positioning part and a measuring part, and the diameter of the end face of the positioning part is equal to the diameter of a circle where the inner side edge of the inner cavity chamfer of the three-column groove shell is located; the end surface diameter of the measuring part is equal to half of the sum of the diameter of a circle where the inner side edge of the inner cavity chamfer of the three-column groove shell is located and the diameter of a circle where the outer side edge is located; according to the utility model, whether the chamfering depth of the inner cavity of the three-column groove shell is qualified or not can be rapidly judged, the detection time is greatly saved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts processing, in particular to a device for quickly measuring the chamfer depth of a special-shaped inner cavity. Background Art

[0002] Three-column groove shell forgings are widely used in automobile chassis transmission systems. The inner chamfer depth of three-column groove shell forgings is required to have an error within ±0.3mm. Since the three-column groove shell has a special-shaped inner cavity, conventional depth gauges and other inspection tools cannot measure it. CMM measurement is required, which takes a long time and is cumbersome to operate, seriously affecting the measurement efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the disadvantages of the prior art and provide a device for quickly measuring the chamfer depth of a special-shaped inner cavity.

[0004] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0005] A device for quickly measuring the chamfer depth of a special-shaped inner cavity, comprising:

[0006] Base;

[0007] A column is fixedly mounted in the middle of the base, the column is perpendicular to the base, and a first observation surface and a second observation surface are arranged on the upper end of the column, the first observation surface and the second observation surface are both parallel to the base, and the first observation surface is higher than the second observation surface;

[0008] The measuring head is coaxially and movably sleeved on the outside of the column, and the measuring head includes a positioning part and a measuring part in the shape of a hollow cylinder. The positioning part and the measuring part are coaxially arranged, and the end face diameter of the positioning part is equal to the diameter of the circle where the inner side edge of the chamfer of the inner cavity of the three-column tank shell is located, and the end face diameter of the measuring part is equal to half of the sum of the diameter of the circle where the inner side edge of the chamfer of the inner cavity of the three-column tank shell is located and the diameter of the circle where the outer side edge is located;

[0009] Among them, the distance between the first observation surface and the lower end surface of the base is h1, the distance between the second observation surface and the lower end surface of the base is h2, the thickness of the measuring part is h3, and the standard value of the chamfer depth of the inner cavity of the three-column groove shell is L, then: h1=L+h3+0.3, h2=L+h3-0.3.

[0010] As a preferred solution of the device for quickly measuring the chamfer depth of a special-shaped inner cavity of the utility model, the cross-sectional shape of the base is similar to the cross-sectional shape of the inner cavity of the three-column groove shell, and the cross-sectional diameter of the base is smaller than the cross-sectional diameter of the inner cavity of the three-column groove shell.

[0011] As a preferred solution of the device for quickly measuring the chamfer depth of a special-shaped inner cavity of the utility model, the measuring part is located above the positioning part.

[0012] As a preferred solution of the device for quickly measuring the chamfer depth of a special-shaped inner cavity of the utility model, the column is cylindrical.

[0013] As a preferred solution of the device for quickly measuring the chamfer depth of a special-shaped inner cavity of the utility model, wherein: the dividing line between the first observation surface and the second observation surface passes through the center of the cross section of the column.

[0014] The beneficial effects of the utility model are:

[0015] The utility model can quickly judge whether the chamfer depth of the inner cavity of the three-column groove shell is qualified, greatly saving the detection time and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the structure of a three-column slot shell forging;

[0018] Figure 2 for Figure 1 AA section diagram in;

[0019] Figure 3 A schematic diagram of the structure of a device for quickly measuring the chamfer depth of a special-shaped inner cavity provided by the utility model;

[0020] Figure 4 A schematic diagram of the side detection principle of the device for quickly measuring the chamfer depth of a special-shaped inner cavity provided by the utility model;

[0021] Among them: 1. base; 2. column; 3. first observation surface; 4. second observation surface; 5. measuring head; 6. positioning part; 7. measuring part; 8. first observation point; 9. second observation point. DETAILED DESCRIPTION

[0022] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below according to specific implementation methods and in combination with the accompanying drawings.

[0023] Figure 3 The schematic diagram of the structure of the device for quickly measuring the chamfer depth of a special-shaped inner cavity provided in the embodiment of the present application. The device comprises a base 1, a column 2 and a measuring head 5. The measuring head 5 can be used to quickly determine whether the chamfer depth of the inner cavity of the three-column tank shell is qualified.

[0024] For a detailed top view of the three-column slot shell forging, see Figure 1 , Figure 1 See the AA section diagram in Figure 2 . Figure 4 It is a top view of the base 1. It can be seen that the cross-sectional shape of the base 1 is similar to the cross-sectional shape of the inner cavity of the three-column tank shell. It should be noted that the cross-sectional diameter of the base 1 is smaller than the cross-sectional diameter of the inner cavity of the three-column tank shell, so that the base 1 can be placed in the inner cavity of the three-column tank shell.

[0025] The column 2 is fixedly mounted in the middle of the upper end surface of the base 1. The column 2 is arranged perpendicular to the base 1, and the axis of the column 2 coincides with the axis of the base 1. Figure 3 A first observation surface 3 and a second observation surface 4 are provided at the upper end of the column 2. The first observation surface 3 and the second observation surface 4 are both parallel to the upper end surface of the base 1, and the first observation surface 3 is higher than the second observation surface 4.

[0026] It should be noted that the connecting surface between the first observation surface 3 and the second observation surface 4 is perpendicular to the first observation surface 3 and the second observation surface 4 .

[0027] The measuring head 5 includes a positioning part 6 and a measuring part 7. The positioning part 6 and the measuring part 7 are both hollow cylindrical structures and are coaxially arranged. A through hole is provided in the middle of the positioning part 6 and the measuring part 7 for the column 2 to pass through. The diameter of the through hole is slightly smaller than the cross-sectional diameter of the column 2, so that the measuring head 5 can slide up and down along the column 2.

[0028] The end face diameter of the positioning portion 6 is equal to or slightly smaller than the diameter of the circle where the inner side edge of the chamfer of the inner cavity of the three-column trough shell is located. When the base 1 is placed on the bottom of the inner cavity of the three-column trough shell, the outer side of the positioning portion 6 mounted on the column 2 fits against the side wall of the inner cavity of the three-column trough shell. At this time, the positioning function of the positioning portion 6 can ensure that the axis of the column 2 coincides with the axis of the three-column trough shell. The end face diameter of the measuring portion 7 is equal to one-half of the sum of the diameter of the circle where the inner side edge of the chamfer of the inner cavity of the three-column trough shell is located and the diameter of the circle where the outer side edge is located. After being positioned by the positioning portion 6, the lower end of the measuring portion 7 abuts against the side wall at one-half of the height of the chamfer of the inner cavity. At this time, the operator touches the flushness between the first observation surface 3 and the second observation surface 4 and the upper end face of the measuring portion 7 with his fingers (i.e. Figure 4 The first observation point 8 and the second observation point 9 in the figure can be used to determine whether the size of the three-column groove shell workpiece is qualified. The specific principle is as follows:

[0029] Set the distance between the first observation surface 3 and the lower end surface of the base 1 to h1, set the distance between the second observation surface 4 and the lower end surface of the base 1 to h2, set the thickness of the measuring part 7 to h3, set the standard value of the chamfer depth of the inner cavity of the three-column groove shell to L, then: h1=L+h3+0.3, h2=L+h3-0.3.

[0030] If the first observation point 8 is convex and the second observation point 9 is concave, it means that the workpiece size is qualified; if the first observation point 8 and the second observation point 9 are both convex, it means that the chamfer depth of the workpiece is less than L-0.3, and the workpiece size is unqualified; if the first observation point 8 and the second observation point 9 are both concave, it means that the chamfer depth of the workpiece is greater than L+0.3, and the workpiece size is unqualified.

[0031] It should be noted that the first observation point 8 and the second observation point 9 are edges of the first observation plane 3 and the second observation plane 4 respectively.

[0032] Therefore, the technical solution of the present application can quickly determine whether the chamfer depth of the inner cavity of the three-column groove shell is qualified, which greatly saves detection time and improves production efficiency.

[0033] 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 device for quickly measuring the chamfer depth of a special-shaped inner cavity, characterized in that: include: Base (1); A column (2) is fixedly mounted in the middle of the base (1), the column (2) is perpendicular to the base (1), and a first observation surface (3) and a second observation surface (4) are provided at the upper end of the column (2), the first observation surface (3) and the second observation surface (4) are both parallel to the base (1), and the first observation surface (3) is higher than the second observation surface (4); A measuring head (5) is coaxially and movably sleeved on the outer side of the column (2), the measuring head (5) comprising a positioning portion (6) and a measuring portion (7) in the shape of a hollow cylinder, the positioning portion (6) and the measuring portion (7) being coaxially arranged, the end face diameter of the positioning portion (6) being equal to the diameter of the circle where the inner side edge of the chamfer of the inner cavity of the three-column trough shell is located, and the end face diameter of the measuring portion (7) being equal to half of the sum of the diameter of the circle where the inner side edge of the chamfer of the inner cavity of the three-column trough shell is located and the diameter of the circle where the outer side edge is located; The distance between the first observation surface (3) and the lower end surface of the base (1) is h1, the distance between the second observation surface (4) and the lower end surface of the base (1) is h2, the thickness of the measuring portion (7) is h3, and the standard value of the chamfer depth of the inner cavity of the three-column trough shell is L, then: h1=L+h3+0.3, h2=L+h3-0.

3.

2. The device for quickly measuring the chamfer depth of a special-shaped inner cavity according to claim 1, characterized in that: The cross-sectional shape of the base (1) is similar to the cross-sectional shape of the inner cavity of the three-column tank shell, and the cross-sectional diameter of the base (1) is smaller than the cross-sectional diameter of the inner cavity of the three-column tank shell.

3. The device for quickly measuring the chamfer depth of a special-shaped inner cavity according to claim 1, characterized in that: The measuring part (7) is located above the positioning part (6).

4. The device for quickly measuring the chamfer depth of a special-shaped inner cavity according to claim 1, characterized in that: The column (2) is cylindrical.

5. The device for quickly measuring the chamfer depth of a special-shaped inner cavity according to claim 4, characterized in that: The dividing line between the first observation surface (3) and the second observation surface (4) passes through the center of the cross section of the column (2).

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