CN103604352A - Sphere roundness measurement instrument - Google Patents

Abstract

The invention discloses a sphere roundness measurement instrument. The sphere roundness measurement instrument comprises a bracket and a detection meter, wherein the bracket comprises a main body part and a lug boss part; the main body part is a cylindrical hollow shell with an opened bottom and a top wall; the lug boss part is located at the center of the top wall of the main body part; a through hole is formed in the center of the upper end of the bracket; the through hole penetrates through the main body part and the lug boss part of the bracket; a meter rod of the detection meter is inserted into the through hole and stretches out of the top wall of the main body part; a positioning threaded hole is formed in the outer circle of the lug boss part in the transverse direction; the positioning threaded hole is internally provided with a positioning screw; a clamping opening is formed in the lower end of the peripheral side wall of the main body part; the clamping opening is provided with a liner. According to the sphere roundness measurement instrument, the roundness is detected by measuring the change of diameters of all parts of a sphere surface; the sphere roundness measurement instrument is high in measurement precision, low in production cost and convenient to operate so that the measurement can be finished before a sphere is assembled, the repair rate of the assembled sphere is reduced, the repeated working rate of an assembler is reduced and the control on product quality by inspection personnel is improved.

Description

A sphere roundness measuring instrument

technical field

The invention relates to a measuring device, in particular to a sphere roundness measuring instrument.

Background technique

The roundness of the ball affects how well the ball fits into the seat. If the degree of fit is high, the resistance of the fluid to move along the sealing surface will be increased, thus improving the sealing performance. It is generally required that the out-of-roundness tolerance of the sphere is grade 10 specified in GB 1184-80 "Shape and Position Tolerance Values", and the roundness of the sphere is difficult to measure accurately in a simple way. The existing sphere roundness measuring instrument or measuring The accuracy is not high, or the structure is complicated, the price is high, and the use is inconvenient, such as a three-coordinate measuring instrument.

Contents of the invention

In order to solve the above technical problems, the object of the present invention is to provide a sphere roundness measuring instrument with high measurement accuracy, simple structure and convenient operation.

In order to achieve the above-mentioned technical purpose and achieve the above-mentioned technical effect, the present invention is realized through the following technical solutions: a sphere roundness measuring instrument, including a bracket and a detection table, the bracket includes a main part and a boss part, and the main part is a bottom A cylindrical hollow shell with an open end and a top wall, the boss part is a cylindrical structure, and the boss part is located at the center of the top wall of the main body part, and the center of the upper end of the bracket is opened with a hole, the through hole runs through the main part of the bracket and the boss part of the bracket. There are positioning threaded holes, and positioning screws are arranged in the positioning threaded holes. The lower end of the peripheral side wall of the main part of the bracket is provided with a bayonet, and a liner is arranged at the bayonet.

Further, the inside of the bottom of the pad is a slope.

Further, the top wall of the main body of the bracket is provided with two threaded holes symmetrically with respect to the axis of the bracket, and screw parts are installed in the two threaded holes.

Further, the two threaded parts are eyebolts or bolts for fixing and holding.

The beneficial effects of the present invention are: the sphere roundness measuring instrument of the present invention can place part of the spherical surface of the sphere inside the main part of the bracket when measuring the roundness of the sphere, and insert the detection table at the through hole of the bracket. The meter head is in contact with the spherical surface of the sphere, tighten the positioning screw to position the body of the test meter, and then turn the sphere roundness measuring instrument by holding the two screw parts with both hands, so that the head of the test meter can contact the spherical surface of different parts of the sphere , through the change of the diameter of different spherical parts to reflect the swing of the pointer of the detection table, so as to detect the roundness of the sphere. The sphere roundness measuring instrument of the present invention has high measurement accuracy and is easy to operate, so that the sphere can be measured before assembly, greatly reducing the repair rate of the assembled sphere, reducing the repetitive labor rate of the assembler, and improving the inspection personnel's confidence in the product. Quality control efforts.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the sphere roundness measuring instrument of the present invention cooperating with the sphere.

Fig. 2 is a schematic structural view of the bracket in the sphere roundness measuring instrument of the present invention.

Detailed ways

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

As shown in Figures 1 and 2, a sphere roundness measuring instrument includes a bracket 1 and a test gauge 2, the bracket 1 includes a main body part 11 and a boss part 12, and the main body part 11 is open at the bottom, with a A cylindrical hollow shell with a top wall, the boss part 12 is a cylindrical structure, and the boss part 12 is located at the center of the top wall of the main body part 11, and the center of the upper end of the bracket 1 has a through hole Hole 3, the through hole 3 runs through the main body part 11 of the bracket 1 and the boss part 12 of the bracket 1, the gauge rod of the detection meter 2 is inserted into the through hole 3, and protrudes from the top wall of the main body part 11, the bracket 1 The outer circle of the boss portion 12 is horizontally provided with positioning screw holes 4, and positioning screws 5 are housed in the positioning screw holes 4, and the lower end of the circumferential side wall of the main body portion 11 of the support 1 has a bayonet 6, and the bayonet 6 Pad 7 is housed at the place. The inside of the bottom of the pad 7 is a slope. The top wall of the main body 11 of the bracket 1 is provided with two threaded holes 8 symmetrically with respect to the axis of the bracket 1 , and a threaded member 9 is installed in each of the two threaded holes 8 . The two screw parts 9 may be eye screws or bolts for fixing and holding.

When utilizing the sphere roundness measuring instrument to measure the sphere roundness, one end of the sphere 10 is placed inside the main body portion 11 of the support 1, and the meter head of the detection meter 2 inserted in the through hole 3 of the support 1 and the spherical surface of the sphere 10 Contact, tighten the positioning screw 4 to position the body of the test meter 2, then turn the sphere roundness measuring instrument by holding the two screw parts 9 with both hands, so that the head of the test meter 2 can contact the spherical surface of different parts of the spheroid 10, The change of the diameter of different spherical parts reflects the swing of the pointer of the test meter. If the swing range of the pointer (which can be read directly from the dial scale) exceeds the design requirement value, the roundness is judged as unqualified, otherwise it is qualified.

A liner 7 is installed at the bayonet 6 at the lower end of the peripheral side wall of the main body part 11 of the bracket 1, which can reduce the friction of the sphere roundness measuring instrument on the surface of the sphere 10. The inner side of the bottom of the liner 7 is a bevel, which can fit well with the surface of the sphere 10 .

The sphere roundness measuring instrument of the present invention has high measurement accuracy and is easy to operate, so that the sphere can be measured before assembly, greatly reducing the repair rate of the assembled sphere, reducing the repetitive labor rate of the assembler, and improving the inspection personnel's confidence in the product. Quality control efforts.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (4)

1. A kind of sphere roundness measuring instrument, it is characterized in that: comprise support and test table, described support comprises main body part and boss part, and described main body part is the cylindrical hollow shell of bottom end opening, with top wall body, the boss part is a cylindrical structure, and the boss part is located at the center of the top wall of the main body part, and a through hole is opened at the center of the upper end of the bracket, and the through hole runs through the main body part of the bracket and the center of the bracket. In the boss part, the gauge rod of the detection meter is inserted into the through hole and protrudes from the top wall of the main part. The outer circle of the boss part of the bracket is horizontally provided with a positioning screw hole, and the positioning screw hole is equipped with a positioning screw. The lower end of the peripheral side wall of the main body part of the bracket is provided with a bayonet, and a liner is installed at the bayonet. 2. The sphere roundness measuring instrument according to claim 1, characterized in that: the inside of the bottom of the pad is a slope. 3. The sphere roundness measuring instrument according to claim 1, characterized in that: the top wall of the main body of the support is symmetrically provided with two threaded holes relative to the axis of the support, and the two threaded holes are Installed with screw. 4. The roundness measuring instrument of a sphere according to claim 3, characterized in that: the two threaded parts are eyebolts or bolts for fixing and holding.

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