A fixture and a detection method for detecting the profile of a sealing groove

Abstract

The present invention discloses a fixture for detecting the profile of a sealing groove, which relates to the field of detection equipment and includes a frame, a positioning support member that is floatingly connected to the frame and used for positioning a workpiece to be measured, an orbital plate arranged above the positioning support member, a driving device arranged on the frame and used for driving the orbital plate to lift and lower, an orbital groove opened on the orbital plate and adapted to the shape of the sealing groove of the workpiece to be measured, and a measuring member that is slidably limited in the orbital groove and used for detecting the sealing groove of the workpiece to be inspected. It also discloses a method for detecting the profile of a sealing groove, including placing the workpiece to be measured on the positioning support column; the driving device drives the orbital plate to descend, decelerates when it reaches the height of the buffer device and continues to descend until it contacts the reference surface of the workpiece to be measured and then stops descending; the measuring member slides along the orbit and collects the numerical value of the indicating mark of the measuring member; the driving device drives the orbital plate to ascend, and the workpiece to be inspected is taken off. The present invention greatly reduces the cost and improves the detection accuracy.

Description

Technical Field

[0001] The invention relates to the field of testing tools, and in particular to a testing tool and a testing method for testing the contour of a sealing groove. Background Art

[0002] like Figure 1 The test piece 100 shown in the figure has area a as the reference surface and area b as the sealing groove. A sealing ring needs to be installed in the sealing groove later. In order to ensure the sealing effect, there are certain requirements for the contour of the sealing groove relative to the reference surface. A set of inspection tools is required to inspect it. Traditional inspection equipment generally consists of the following parts: inspection tool base, test piece positioning pin, test piece support column, track plate positioning pin, track plate, dial indicator and elbow clamp. The specific operation method is as follows: the first step is to place the workpiece to be inspected into the workpiece positioning pin to position the workpiece to be inspected, and multiple workpiece support columns will support the workpiece to be inspected flat; the second step is to place the track plate into the track plate positioning pin to position the track plate, and then the track plate will be attached to the reference surface of the workpiece to be inspected; the third step is to close the four elbow clamps and tighten the track plate to effectively fit the track plate and the reference surface of the workpiece to be inspected; the fourth step is to put the dial indicator into the track on the track plate, so that the needle of the dial indicator contacts the bottom of the sealing groove, slide along the track, and judge whether the contour is qualified by observing the jump of the needle; the fifth step is to release the elbow clamp, remove the track plate and remove the workpiece to be inspected.

[0003] Although the above-mentioned traditional inspection fixture has a simple structure, it has many disadvantages, including: first, the processing requirements for the height size of the support column of the inspected workpiece are high. If the height difference of the three support columns does not meet the requirements, it is easy to cause the inspected workpiece to tilt; second, the support column of the inspected workpiece supports the blank, and the consistency of the blank is difficult to ensure, which can easily cause the inspected workpiece to be placed unevenly and cause inaccurate detection; finally, the track plate is relatively heavy, and the track plate needs to be aligned with the track plate positioning pins to be inserted, which is not easy to operate and has high labor intensity. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a high reliability and high detection accuracy detection tool for detecting the contour of a sealing groove. In addition, a method for detecting the contour of a sealing groove is also provided.

[0005] The technical solution adopted by the present invention to solve its technical problem is: the inspection tool for detecting the contour of the sealing groove includes a frame, a plurality of positioning support members floatingly connected to the frame for positioning the workpiece to be tested, a track plate arranged above the positioning support members, a driving device arranged on the frame for driving the track plate to rise and fall, a track groove opened on the track plate and adapted to the shape of the sealing groove of the workpiece to be tested, and a measuring member slidingly limited in the track groove for detecting the sealing groove of the workpiece to be tested.

[0006] Further, the rack includes a bottom plate, a support plate, and columns connecting the support plate and the bottom plate, and the positioning and supporting member is floatingly connected to the support plate.

[0007] Further, each of the positioning and supporting members respectively includes a positioning pin and a spring sleeved on the positioning pin.

[0008] Further, the positioning pin includes a pin shaft body, a first pin head arranged at the upper end of the pin shaft body, and a second pin head arranged at the lower end of the pin shaft. The diameter of the first pin head is greater than the diameter of the pin shaft body. The spring is sleeved on the pin shaft and its ends respectively press against the first pin head and the support plate; limit protrusions for positioning the workpiece to be measured are arranged on the first pin heads of two or more positioning and supporting members.

[0009] Further, it also includes a buffer member arranged on the support plate for buffering the falling speed of the track plate.

[0010] Further, there are two buffer members which are diagonally arranged on the support plate; the buffer member includes a base and a telescopic head that can telescopically move relative to the base and is arranged on the base.

[0011] Further, a notch is also formed on the support plate, and the notch extends below the workpiece measuring station surrounded by the positioning and supporting members. The width of the inner side of the notch is smaller than the width of the notch at the edge.

[0012] Further, the driving device includes a cylinder, and the cylinder is fixedly connected to the support plate and the piston rod is connected to the track plate.

[0013] Further, the driving device also includes a hand-operated valve arranged on the bottom plate for controlling the action direction of the cylinder, and a speed control valve for controlling the action speed of the cylinder.

[0014] Based on the same concept, a method for detecting the profile of a sealing groove is also provided. Using the above-mentioned fixture for detecting the profile of a sealing groove, it includes the following steps:

[0015] S1. Place the workpiece to be measured on the positioning support column;

[0016] S2. The driving device drives the track plate to descend. After descending to the height of the buffer device, it decelerates and descends until it contacts the reference surface of the workpiece to be measured and then stops descending;

[0017] S3. The measuring member slides along the track and collects the numerical value of the indicating mark of the measuring member;

[0018] S4. The driving device drives the track plate to rise, and the workpiece to be inspected is taken off to complete the inspection.

[0019] The inspection tool for detecting the profile of the sealing groove includes a positioning support member that is floatingly connected to the frame. When the workpiece to be inspected is positioned on the positioning support member during inspection, the inclination of the workpiece to be inspected can be avoided. The reason is that with the floating connection, even if the height difference of the positioning support columns does not meet the requirements, the influence can be eliminated by the tolerance of the positioning support member with the floating connection, greatly improving the reliability. At the same time, since the height dimensions of each positioning support column do not need to be overly strictly required, the processing cost will be greatly reduced.

[0020] In addition, since the workpiece to be inspected is a rough workpiece, it is very difficult to ensure the consistency of the workpiece to be inspected. The floating connection structure can level the workpiece to be inspected to the greatest extent, greatly improving the inspection accuracy. Brief Description of the Drawings

[0021] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0022] Figure 1 is a schematic structural diagram of the workpiece to be inspected;

[0023] Figure 2 is a schematic structural diagram of the inspection tool for detecting the profile of the sealing groove according to an embodiment of the present invention;

[0024] Figure 3 is a side view of the inspection tool for detecting the profile of the sealing groove according to an embodiment of the present invention;

[0025] Figure 4 is a side view of the inspection tool for detecting the profile of the sealing groove according to an embodiment of the present invention from another perspective;

[0026] Figure 5 is a top view of the inspection tool for detecting the profile of the sealing groove according to an embodiment of the present invention;

[0027] Figure 6 is a schematic structural diagram of the inspection tool for detecting the profile of the sealing groove according to an embodiment of the present invention from another perspective;

[0028] Figure 7 is a schematic structural diagram of the embodiment of the present invention after removing the track plate;

[0029] Figure 8 is a schematic structural diagram of the embodiment of the present invention after removing the track plate and the workpiece to be inspected;

[0030] Figure 9 is Figure 8 an enlarged view of part A of

[0031] Description of the Reference Numerals:

[0032] 1. Frame; 11. Bottom plate; 12. Support plate; 121. Notch; 13. Column; 14. Guide post; 2. Positioning support; 21. Pin shaft body; 22. First pin head; 23. Second pin head; 24. Limit protrusion; 25. Spring; 3. Track plate; 31. Track groove; 4. Driving device; 41. Cylinder; 42. Hand-operated valve; 43. Speed control valve; 44. Piston rod; 5. Measuring piece; 6. Buffer piece; 100. Piece to be inspected. Detailed implementation manner

[0033] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific implementation manner of the present invention will now be described in detail with reference to the accompanying drawings.

[0034] As Figures 2-9 shown, the inspection tool for detecting the profile of the sealing groove includes a frame 1, a positioning support 2, a track plate 3, a driving device 4, and a measuring piece 5. The frame 1 includes a bottom plate 11, a support plate 12, and columns 13 connecting the support plate 12 and the bottom plate 11. The number of positioning supports 2 is 4, and the positioning supports 2 are floatingly connected to the support plate 12, and the positioning supports 2 are used to fixedly position the piece to be inspected. Of course, in some other embodiments, the number of the positioning supports 2 can also be designed according to the shape of the specific piece to be inspected 100.

[0035] The track plate 3 is located above the positioning support 2. A track groove 31 adapted to the shape of the sealing groove of the piece to be inspected is provided on the track plate 3. The driving device 4 includes a cylinder 41. The cylinder 41 is fixedly connected to the support plate 12 and the piston rod 44 is connected to the track plate 3. The driving device 4 further includes a hand-operated valve 42 provided on the bottom plate 11 for controlling the movement direction of the cylinder 41, and a speed control valve 43 for controlling the movement speed of the cylinder 41. Guide posts 14 for guiding are connected between the support plate 12 and the track plate 3 when the track plate 3 is lifted and lowered. The measuring piece 5 is slidably limited in the track groove 31 for detecting the sealing groove of the piece to be inspected. In this embodiment, the measuring piece 5 is a dial indicator.

[0036] The inspection tool for detecting the profile of the sealing groove includes a positioning support 2 floatingly connected to the frame 1. After positioning the piece to be inspected 100 on the positioning support 2 during inspection, the piece to be inspected 100 can be prevented from tilting. The reason is that by using a floating connection, even if the height difference of the positioning support columns does not meet the requirements, the influence can be eliminated through the tolerance of the floatingly connected positioning support 2. At the same time, since the height dimensions of each positioning support column do not need to be overly strictly required, the processing cost will be greatly reduced.

[0037] In addition, since the piece to be inspected 100 is a blank part, it is difficult to ensure the consistency of the piece to be inspected 100. The floating connection structure can level the piece to be inspected 100 to the greatest extent, greatly improving the inspection accuracy.

[0038] In this embodiment, the positioning support 2 includes a positioning pin and a spring 25 mounted on the positioning pin. Of course, in some other embodiments, the positioning support 2 can also be a combination of a positioning pin and a metal spring; or a combination of a positioning pin and a compression spring, such as a compression spring arranged at the bottom of the positioning pin.

[0039] The positioning pin includes a pin shaft body 21, a first pin head 22 disposed at the upper end of the pin shaft body 21, and a second pin head 23 disposed at the lower end of the pin shaft. The diameter of the first pin head 22 is larger than the diameter of the pin shaft body 21. The spring 25 is sleeved on the pin shaft and the ends thereof are respectively pressed against the first pin head 22 and the support plate 12. The two first pin heads 22 are provided with limiting protrusions 24 for positioning the to-be-tested object. At least two limiting protrusions 24 are provided to effectively limit the position of the to-be-tested object and prevent the to-be-tested object 100 from rotating during the detection process.

[0040] In order to cooperate with the speed regulating valve 43 to achieve the maximum effect, a buffer 6 for buffering the falling speed of the track plate 3 is also connected to the support plate 12. There are two buffers 6 and they are arranged diagonally on the support plate 12; the buffer 6 includes a base and a telescopic head arranged on the base and can be telescopic relative to the base. In this embodiment, the buffer 6 is a hydraulic buffer, which can effectively reduce the impact of the track plate 3 on the reference surface of the inspected object 100 under the action of the speed regulating valve 43 and the hydraulic buffer, and protect the reference surface from damage.

[0041] To facilitate the placement and placement of the test piece 100 , a notch 121 is provided on the support plate 12 . The notch 121 extends below the test station surrounded by the positioning support 2 . The inner width of the notch 121 is smaller than the channel width at the edge.

[0042] The method for detecting the contour of the sealing groove using the above-mentioned inspection tool for detecting the contour of the sealing groove comprises the following steps:

[0043] S1. Place the object to be inspected on the positioning support column;

[0044] S2, the driving device 4 drives the track plate 3 to descend, and after descending to the height of the buffer device, it decelerates and descends until it contacts the reference surface of the test piece and stops descending; including rotating the hand valve 42, the cylinder 41 pulls the track plate 3 down along the guide column 14, and under the action of the oil pressure buffer, the track plate 3 slowly descends and stops before contacting the reference surface of the test piece 100;

[0045] S3, the measuring piece 5 slides along the track and collects the value of the indicator mark of the measuring piece 5; including placing a dial indicator into the track on the track plate 3, making the needle of the dial indicator contact the bottom of the sealing groove, sliding along the track, and judging whether the contour is qualified by observing the beating of the needle;

[0046] S4, the driving device 4 drives the track plate 3 to rise, removes the test piece and completes the test.

[0047] The detection method for the profile of the sealing groove uses a positioning and supporting member 2 that is floatingly connected to the frame 1. When detecting, after positioning the workpiece to be inspected 100 on the positioning and supporting member 2, the inclination of the workpiece to be inspected 100 can be avoided. The reason is that with the floating connection, even if the height difference of the positioning support columns does not meet the requirements, the influence can be eliminated by the tolerance of the positioning and supporting member 2 with the floating connection, greatly improving the reliability. At the same time, since the height dimensions of the positioning support columns do not need to be overly strictly required, the processing cost will be greatly reduced.

[0048] In addition, since the workpiece to be inspected 100 is a rough workpiece, it is very difficult to ensure the consistency of the workpiece to be inspected 100. The floating connection structure can level the workpiece to be inspected 100 to the greatest extent, greatly improving the detection accuracy.

[0049] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A fixture for detecting the profile of a sealing groove, characterized in that, it includes a frame (1), a plurality of positioning and supporting members (2) floatingly connected to the frame (1) for positioning the workpiece to be inspected, an orbital plate (3) arranged above the positioning and supporting members (2), a driving device (4) arranged on the frame (1) for driving the orbital plate (3) to move up and down, an orbital groove (31) opened on the orbital plate (3) and adapted to the shape of the sealing groove of the workpiece to be inspected, and a measuring member (5) slidably limited in the orbital groove (31) for detecting the sealing groove of the workpiece to be inspected. The frame (1) includes a bottom plate (11), a support plate (12), and columns (13) connected between the support plate (12) and the bottom plate (11). The positioning and supporting members (2) are floatingly connected to the support plate (12). Each of the positioning and supporting members (2) includes a positioning pin and a spring (25) sleeved on the positioning pin. A notch (121) is also opened on the support plate (12). The notch (121) extends below the measurement station surrounded by the positioning and supporting members (2). The width of the inner side of the notch (121) is smaller than the width of the notch at the edge. The driving device (4) includes a cylinder (41). The cylinder (41) is fixedly connected to the support plate (12) and the piston rod (44) is connected to the orbital plate (3). The driving device (4) further includes a hand-operated valve (42) arranged on the bottom plate (11) for controlling the action direction of the cylinder (41), and a speed control valve (43) for controlling the action speed of the cylinder (41). The driving device (4) drives the orbital plate (3) to descend. After descending to the height of the buffer member (6), it decelerates until it contacts the reference surface of the workpiece to be inspected and then stops descending. Guide columns (14) for guiding are connected to the support plate (12) and the orbital plate (3) when driving the orbital plate (3) to move up and down. It further includes a buffer member (6) arranged on the support plate (12) for buffering the falling speed of the orbital plate (3). There are two buffer members (6) and they are arranged diagonally on the support plate (12); the buffer member (6) includes a base and a telescopic head arranged on the base and capable of telescoping relative to the base.

2. The fixture for detecting the profile of a sealing groove according to claim 1, characterized in that, the positioning pin includes a pin shaft body (21), a first pin head (22) arranged at the upper end of the pin shaft body (21), and a second pin head (23) arranged at the lower end of the pin shaft. The diameter of the first pin head (22) is larger than the diameter of the pin shaft body (21). The spring (25) is sleeved on the pin shaft and the ends respectively press against the first pin head (22) and the support plate (12); limit protrusions (24) for positioning the workpiece to be inspected are arranged on the first pin heads (22) of two or more positioning and supporting members (2).

3. A method for detecting the profile of a sealing groove, characterized in that, using the fixture according to any one of claims 1-2, includes the following steps, S1. Place the workpiece to be inspected on the positioning support column; S2. The driving device (4) drives the orbital plate (3) to descend. After descending to the height of the buffer member (6), it decelerates until it contacts the reference surface of the workpiece to be inspected and then stops descending. S3. The measuring member (5) slides along the track and collects the numerical value of the indicating mark of the measuring member (5); S4. The driving device (4) drives the track slab (3) to rise, removes the part to be inspected, and completes the inspection.

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