Arc surface hole position testing fixture

Abstract

The utility model discloses an arc surface hole position testing fixture, which comprises a testing block, a positioning bolt and shading strips for shielding external light leakage, the testing block comprises a positioning section, a connecting section and a testing section which are integrally arranged, the shading strips are symmetrically arranged on two sides of the testing section, the cross section of each shading strip is an outwards protruding arc line, and the positioning bolt passes through a positioning testing hole of the testing block and then is inserted into the positioning testing hole. According to the arc surface hole position testing fixture, whether the position precision of the positioning hole and the exhaust hole of the to-be-tested chuck shell relative to the upper step surface and the lower step surface reaches the standard or not is judged through the positioning reference surface of the testing block and the formed positioning testing hole and the exhaust testing hole; the auxiliary light source penetrates through other positioning holes and exhaust holes of the to-be-detected chuck shell, whether light is transmitted outside the positioning detection hole and the exhaust detection hole in the outer side or not is observed with human eyes, so that the position precision of the positioning holes and the exhaust holes of the to-be-detected chuck shell is judged, and the detection process is simple, convenient, direct, practical and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of inspection tools, and particularly relates to an arc hole position inspection tool. Background Art

[0002] Our company has designed and produced a positioning chuck for a large metal pipe fitting. The outer shell of this type of chuck is set in a sleeve shape. Referring to Figure 1 in the attached drawings of the specification, multiple groups of through holes are arrayed on the outer periphery of the sleeve. The through holes include two types: positioning holes and exhaust holes. To ensure that after the sleeve-shaped chuck outer shell is fitted with the internal assembly, when hydraulic transmission is implemented, the piston assembly needs to exhaust air necessarily. Therefore, the exhaust holes play a crucial role. Since the reserved aperture of the exhaust holes is small, and the positioning holes are for internal assembly. Whether the machining of multiple holes can meet the accuracy requirements of the technology still requires further precise measurement. The traditional three-coordinate measuring machine has high detection accuracy, but slow efficiency and high equipment cost. For the position detection of the exhaust holes, and the accuracy requirement for the aperture size is not particularly high, but the detection efficiency of the chuck outer shell is required to be improved. Therefore, it is necessary for us to specially design a dedicated inspection tool to provide a fast detection solution for the position accuracy of the positioning holes and exhaust holes, which can significantly improve the detection efficiency of the through holes and greatly reduce the equipment cost. Content of the Utility Model

[0003] The purpose of the utility model is: to facilitate the position degree detection of the positioning holes and exhaust holes of the chuck outer shell of the positioning chuck for the large metal pipe fitting produced by our company. On the premise of ensuring that there is no high detection requirement for the aperture size accuracy, to improve the position degree detection of the holes and the technical requirement of the detection efficiency, we design and provide an arc hole position inspection tool.

[0004] The technical solution adopted to solve the above problems is:

[0005] An arc hole position inspection tool includes an inspection block, positioning pins and light-shielding strips for blocking external light leakage.

[0006] The inspection block includes a positioning section, a connecting section and a detection section integrally arranged. The positioning section is parallel to the detection section, the connecting section is perpendicular to the detection section. The positioning section fits the upper or lower generatrix of the outer circle of the chuck outer shell to be measured to achieve reference positioning. The detection section fits the outer circle of the chuck outer shell to be measured where the positioning holes and exhaust holes are opened, and corresponding detection holes are arranged opposite to the positioning holes and exhaust holes, including positioning detection holes and exhaust detection holes.

[0007] Light-shielding strips are symmetrically arranged on both sides of the detection section. The cross-section of the light-shielding strip is an arc protruding outwards.

[0008] After the positioning pin passes through the positioning detection hole of the inspection block, it is sleeved and matched with the positioning hole of the outer ring of the chuck shell to be tested, so as to position and clamp the inspection block, and make the remaining positioning holes and exhaust holes of the chuck shell to be tested correspond to the positions of the positioning detection holes and exhaust detection holes of the inspection block respectively, and transmit light through the remaining positioning holes and exhaust holes of the chuck shell to be tested through the auxiliary light source, and then observe with human eyes whether the outside of the positioning detection holes and exhaust detection holes on the outside are light-transmissive, so as to judge the position accuracy of the positioning holes and exhaust holes of the chuck shell to be tested.

[0009] Furthermore, the connecting section fits against the stepped surface of the outer ring of the chuck shell to be tested to achieve reference positioning.

[0010] Furthermore, after the shading strip is attached to the busbar of the outer ring of the chuck shell, it is tightly pressed to block external light outside the gap formed by the detection section and the chuck shell to be tested.

[0011] Furthermore, the connecting section includes a lower reference surface that fits the lower step surface of the chuck shell to be tested and an upper reference surface that fits the upper step surface of the chuck shell to be tested. Through two reference positioning, it is determined whether the position accuracy of the positioning hole and the exhaust hole of the chuck shell to be tested compared with the upper step surface and the lower step surface meets the standard.

[0012] The beneficial effects of the utility model are:

[0013] The arc surface position inspection fixture determines whether the position accuracy of the positioning holes and exhaust holes of the chuck shell to be tested is up to standard compared with the upper step surface and the lower step surface through the positioning reference surface of the inspection block and the positioning detection holes and exhaust detection holes opened. It also passes the remaining positioning holes and exhaust holes of the chuck shell to be tested through an auxiliary light source, and then observes with human eyes whether the outside of the positioning detection holes and exhaust detection holes on the outside are light-transmissive, so as to determine the position accuracy of the positioning holes and exhaust holes of the chuck shell to be tested. The inspection process is simple, direct, practical and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the arc surface position detection fixture of the embodiment adopting the lower step surface positioning detection;

[0015] Figure 2 for Figure 1 Schematic diagram of the position state of the arc surface position checking fixture described in;

[0016] Figure 3 It is a structural schematic diagram of the arc surface position detection fixture of the embodiment adopting the upper step surface positioning detection;

[0017] Figure 4 for Figure 3 Schematic diagram of the position state of the arc surface position checking fixture described in;

[0018] Figure 5 for Figure 1A cross-sectional view of the detection state of the arc surface position inspection fixture described in the above;

[0019] Figure 6 for Figure 3 A cross-sectional view of the detection state of the arc surface position inspection fixture described in the above;

[0020] Among them, 1-lower step surface, 2-upper step surface, 3-chuck shell, 4-positioning hole, 5-exhaust hole, 6-positioning detection hole, 7-positioning pin, 8-exhaust detection hole, 9-positioning section, 10-cross pin, 11-outer shading strip, 12-inner shading strip, 13-lower reference surface, 14-upper reference surface, 15-auxiliary light source. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model will be clearly and completely described in the following in combination with the accompanying drawings in the form of embodiments.

[0022] See also Figures 1 to 6 This embodiment provides a circular arc surface position inspection tool, including a inspection block, a positioning pin 7 and a shading strip for blocking external light leakage, wherein the shading strip includes an outer shading strip 11 and an inner shading strip 12.

[0023] See also Figure 2 and Figure 4 The inspection block includes an integrally arranged positioning section 9, a connecting section, and a detection section. The positioning section 9 is parallel to the detection section, and the connecting section is perpendicular to the detection section. The positioning section 9 fits the upper busbar or the lower busbar of the outer ring of the chuck shell 3 to be tested to achieve reference positioning. The detection section fits the outer ring of the chuck shell 3 to be tested, which is provided with positioning holes 4 and exhaust holes 5, and corresponding detection holes are arranged opposite to the positioning holes 4 and the exhaust holes 5, including a positioning detection hole 6 and an exhaust detection hole 8.

[0024] See also Figure 2 and Figure 4 , shading strips are symmetrically arranged on both sides of the detection section, and the cross section of the shading strip is an arc protruding outward.

[0025] See also Figure 2 and Figure 4 After the cross pin 10 of the positioning pin 7 passes through the positioning detection hole 6 of the inspection block, it is sleeved and matched with the positioning hole 4 of the outer ring of the chuck shell 3 to be tested, so as to position and clamp the inspection block, and make the remaining positioning holes 4 and exhaust holes 5 of the chuck shell 3 to be tested correspond to the positions of the positioning detection hole 6 and exhaust detection hole 8 of the inspection block respectively, and the auxiliary light source 15 emits light through the remaining positioning holes 4 and exhaust holes 5 of the chuck shell 3 to be tested, and then observes with human eyes whether the outside of the positioning detection hole 6 and the exhaust detection hole 8 are light-transmitting, so as to judge the position accuracy of the positioning holes 4 and the exhaust holes 5 of the chuck shell 3 to be tested.

[0026] See alsoFigure 2 and Figure 4 , and Figure 5 and Figure 6 , the connecting section fits the stepped surface on the outer circle of the chuck housing 3 to be measured to achieve reference positioning. The connecting section includes a lower reference surface 13 that fits the lower stepped surface 1 of the chuck housing 3 to be measured and an upper reference surface 14 that fits the upper stepped surface 2 of the chuck housing 3 to be measured. Through two reference positionings, it is determined whether the position accuracy of the positioning hole 4 and the exhaust hole 5 of the chuck housing 3 to be measured relative to the upper stepped surface 2 and the lower stepped surface 1 meets the standard.

[0027] Refer to Figure 5 and Figure 6 , after the light-shielding strip fits the generatrix on the outer circle of the chuck housing 3, it is tightly pressed to block external light outside the gap formed by the detection section and the chuck housing 3 to be measured.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes, modifications, substitutions, and variations can be made without departing from the purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circular arc surface position inspection tool, comprising an inspection block, a positioning pin (7) and a light shielding strip for shielding external light leakage, characterized in that: The inspection block comprises an integrally arranged positioning section (9), a connecting section, and a detection section. The positioning section (9) is parallel to the detection section, and the connecting section is perpendicular to the detection section. The positioning section (9) is fitted to the upper busbar or the lower busbar of the outer ring of the chuck shell (3) to be tested to achieve reference positioning. The detection section is fitted to the outer ring of the chuck shell (3) to be tested, which is provided with a positioning hole (4) and an exhaust hole (5), and corresponding detection holes are arranged opposite to the positioning hole (4) and the exhaust hole (5), including a positioning detection hole (6) and an exhaust detection hole (8). The detection section is symmetrically provided with shading strips on both sides, and the cross section of the shading strips is an arc protruding outwards. After the positioning pin (7) passes through the positioning detection hole (6) of the inspection block, it is sleeved and matched with the positioning hole (4) of the outer ring of the chuck shell (3) to be tested, so as to position and clamp the inspection block, and make the remaining positioning holes (4) and exhaust holes (5) of the chuck shell (3) to be tested correspond to the positions of the positioning detection hole (6) and exhaust detection hole (8) of the inspection block respectively. The auxiliary light source (15) emits light through the remaining positioning holes (4) and exhaust holes (5) of the chuck shell (3) to be tested, and then observes with human eyes whether the outside of the positioning detection hole (6) and exhaust detection hole (8) are light-transmissive, so as to judge the position accuracy of the positioning hole (4) and exhaust hole (5) of the chuck shell (3) to be tested.

2. The arc surface position detection device according to claim 1, characterized in that: The connecting section fits against the outer ring stepped surface of the chuck housing (3) to be tested to achieve reference positioning.

3. The arc surface position detection device according to claim 1, characterized in that: After the light shielding strip is attached to the busbar of the outer ring of the chuck shell (3), it is tightly pressed together to shield external light from the gap formed by the detection section and the chuck shell (3) to be tested.

4. The arc surface position detection device according to claim 1, characterized in that: The connecting section comprises a lower reference surface (13) which fits the lower step surface (1) of the chuck shell (3) to be tested and an upper reference surface (14) which fits the upper step surface (2) of the chuck shell (3) to be tested. Through two reference positionings, it is determined whether the position accuracy of the positioning hole (4) and the exhaust hole (5) of the chuck shell (3) to be tested meets the standard compared with the upper step surface (2) and the lower step surface (1).

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