Telescopic centering rod

Abstract

The utility model discloses a telescopic centering rod which comprises a guide sleeve, a limiting shaft and a detection body. The guide sleeve comprises a guide section and a connecting section; the machining precision of an inner hole of the guide section of the guide sleeve is 0.005 mm; the guide sleeve connecting section is of a precise thread structure; one end of the limiting shaft is fixed in equipment and is consistent with the equipment in coaxiality; the other end of the limiting shaft is in replaceable fastening connection with a precise thread of the connecting section of the guide sleeve; the detection body is provided with a columnar guide area and an observation area; the guide section of the guide sleeve is matched with the columnar guide area of the detection body, and the coaxiality of the axis of the detection body and the axis of the guide fixed end is within the range of 0.01 mm; the observation area of the detection body is arranged at the end part of the detection body and is chamfered; the diameters of the chamfered surfaces are gradually increased, and annular marks are arranged in the range that the diameters are increased by 2mm every time. According to the utility model, aiming at relatively moving equipment or mechanisms, the detection distance can be adjusted, and the coaxiality of two static parts can be accurately measured when the equipment is shut down; and the detection result is visualized, so that the equipment is convenient to overhaul, maintain and adjust.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing and relates to a telescopic centering rod, which is particularly suitable for coaxiality measurement of equipment. Background Art

[0002] When the equipment works for a long time, the coaxiality may deteriorate. For example, for the round table spinning equipment, the coaxiality of the spinning mechanism and the base tooling of the equipment has a great impact on the product; this requires regular measurement of the coaxiality of the equipment. Existing centering rods are all one-piece. Since the two parts of the equipment to be measured are on the equipment body and cannot move relative to each other during the shutdown measurement process, the size of the centering rod is limited by the space size. After the one-piece centering rod is installed, the centering rod is farther away from the measurement position, and accurate measurement of the coaxiality cannot be achieved. Summary of the invention

[0003] The utility model discloses a telescopic centering rod to solve the problem that the coaxiality of two stationary parts cannot be accurately measured in the prior art.

[0004] The utility model discloses a telescopic centering rod, comprising a guide sleeve, a limit shaft and a detection body; the guide sleeve comprises a guide section and a connecting section; the inner hole of the guide section of the guide sleeve has a processing accuracy of 0.005mm; the connecting section of the guide sleeve is a precision threaded structure; one end of the limit shaft is fixed in the equipment to ensure the coaxiality with the equipment; the other end of the limit shaft is replaceably and tightly connected with the connecting section of the guide sleeve by precision threads; the detection body has a columnar guide area and an observation area; the columnar guide area of ​​the detection body is a stepped cylinder, and the columnar guide area includes a precision guide section with a length of not less than 10mm and a processing accuracy of 0.005mm; the guide section of the guide sleeve cooperates with the precision guide section of the detection body to ensure that the coaxiality of the axis of the detection body and the axis of the guide fixed end is within a range of 0.01mm during the telescopic process; the observation area of ​​the detection body is at the end of the detection body and is chamfered; along the chamfered surface, the diameter increases from small to large, and there is an annular mark within a range of 2mm for every increase in diameter.

[0005] During measurement, observe the contact position between the observation area of ​​the probe and the tooling or mechanism to be measured, and observe the ring marks on the chamfered surface at the range of 2mm difference in diameter; when the outermost diameter of the probe end is A; the size of the hole to be measured is B mm, and the number of visible rings is C; (C -(AB) / 2) mm≤eccentricity distance < (C -(AB) / 2 +1) mm. By observing the number of ring marks that the object to be measured contacts, it is very intuitive to observe what range the eccentricity is in.

[0006] The guide sleeve can ensure the coaxiality of the equipment and the testing mechanism by machining the thread accuracy and the interface size accuracy; and can realize the application of this centering rod on different equipment.

[0007] The positive effects of the utility model are: for relatively moving equipment or mechanisms, the detection distance can be adjusted, and the coaxiality of two stationary parts can be accurately measured when the equipment is stopped; the visual detection results are convenient for equipment inspection, maintenance and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the utility model;

[0009] Figure 2 This is a cross-sectional view of the structure of the utility model;

[0010] In the figure: 1 guide sleeve, 2 limit shaft, 3 detection body, 3a observation area. DETAILED DESCRIPTION

[0011] An embodiment of the present utility model is described in detail below with reference to the accompanying drawings.

[0012] The utility model is implemented as follows Figure 1 , Figure 2 As shown, it includes a guide sleeve 1, a limit shaft 2, and a detection body 3; the detection body 3 has a columnar guide area and an observation area 3a;

[0013] The total length of the guide sleeve 1 is 150 mm, including the guide section and the connecting section; the guide section of the guide sleeve 1 is 135 mm long, and the inner hole processing accuracy is 0.005 mm.

[0014] One end of the limit shaft 2 is connected to the connecting section of the guide sleeve 1 by a precision thread that can be replaced and fastened; the guide sleeve 1 can ensure the coaxiality of the equipment and the test mechanism by machining the thread precision and the interface size precision. And the centering rod can be used on different equipment.

[0015] The other end of the limit shaft 2 can be fixed in the equipment to ensure the coaxiality with the equipment;

[0016] The total length of the probe body 3 is 135mm. The columnar guide area of ​​the probe body 3 is a stepped cylinder. The columnar guide area includes a precision guide section with a length of 10mm and a processing accuracy of 0.005mm. The guide section of the guide sleeve 1 cooperates with the precision guide section of the probe body 3 to ensure that the coaxiality of the axis of the probe body 3 and the axis of the guide fixed end is within 0.01mm during the extension and retraction process. The observation area 3a of the probe body 3 is at the end of the probe body 3 and is chamfered. In the embodiment, the chamfer is designed to be 8mm*8mm according to the actual equipment and range to be tested. The diameter of the large diameter before chamfering is 32mm, and the inner diameter after chamfering is 16mm. On the chamfered surface, on the basis of the inner diameter of 16mm, a ring mark is processed for every 2mm increase in diameter.

[0017] Usage process:

[0018] 1. Select the appropriate limit axis according to the equipment 2.

[0019] 2. Connect the replaceable limit shaft 2 to the connecting section of the guide sleeve 1;

[0020] 3. Place the columnar guide area of ​​the detection body 3 in the guide section of the guide sleeve 1, and insert the detection body 3 into the innermost part of the guide sleeve 1, close to the limit axis 2.

[0021] 4. Fix the limit axis 2 to the device under test.

[0022] 5. Extend the detection body 3 to contact the tooling or equipment mechanism to be detected.

[0023] 6. Observe the ring marks that the object to be measured touches. During measurement, observe the contact position between the observation area 3a of the detection body 3 and the tooling or mechanism to be measured, and observe the ring marks on the chamfered surface at the range of 2mm difference in diameter; when the outermost diameter of the detection end is A; the size of the hole to be measured is B mm, and the number of visible rings is C; (C -(AB) / 2) mm≤eccentricity distance<(C -(AB) / 2 +1) mm;

[0024] The outermost diameter of the detection end is A=32mm, the diameter of the hole to be inspected is B=24mm, and the number of observation rings is C=4;

[0025] Then (4-(32-24) / 2) mm ≤ eccentric distance < ((4-(32-24) / 2) + 1) mm

[0026] That is: 0mm≤eccentric distance<1mm

[0027] The outer diameter of the detection end is A=32mm, the hole to be inspected is B=24mm, and the number of observation rings is C=5

[0028] Then (5-(32-24) / 2) mm ≤ eccentric distance < ((5-(32-24) / 2) + 1) mm

[0029] That is: 1mm≤eccentric distance<2mm

[0030] By observing the number of ring marks that the object to be measured touches, the range of the eccentricity can be intuitively observed.

Claims

1. A telescopic centering rod, characterized in that: It includes a guide sleeve, a limit shaft and a detection body; the guide sleeve includes a guide section and a connecting section; the inner hole processing accuracy of the guide section of the guide sleeve is 0.005mm; the connecting section of the guide sleeve is a precision threaded structure; one end of the limit shaft is fixed in the equipment and is consistent with the coaxiality of the equipment; the other end of the limit shaft is replaceably and fastened to the connecting section of the guide sleeve by a precision thread; the detection body has a columnar guide area and an observation area; the guide section of the guide sleeve cooperates with the columnar guide area of ​​the detection body, and the coaxiality of the detection body axis and the axis of the guide fixed end is within 0.01mm; the observation area of ​​the detection body is at the end of the detection body and is chamfered; along the chamfered surface, the diameter increases from small to large, and there is an annular mark within the range of every 2mm increase in diameter.

2. A telescopic centering rod according to claim 1, characterized in that: The inner hole machining accuracy of the guide section of the guide sleeve is 0.005mm; the columnar guide area of ​​the detection body is a stepped cylinder, and the columnar guide area includes a precision guide section with a length of not less than 10mm and a machining accuracy of 0.005mm; the guide section of the guide sleeve cooperates with the precision guide section of the detection body.

3. The telescopic centering rod according to claim 1, characterized in that: When the outermost diameter of the detection end is A, the size of the hole to be measured is B mm, and the number of visible rings is C; (C -(AB) / 2) mm ≤ eccentricity distance < (C -(AB) / 2 +1) mm.

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