Measuring tool and method for detecting positions of multiple holes in cylindrical surface

Abstract

A cylindrical surface hole position detection measuring tool disclosed by the present invention comprises a fixed base, the fixed base is provided with a rotatable fillet measurement assembly and a fixedly arranged height measurement assembly, and the fillet measurement assembly is fixedly provided with a detected piece. The angle difference and the height difference between a hole in the cylinder and a certain hole can be obtained by rotating the fillet measuring assembly to drive the measured piece to rotate together. According to the measuring tool for detecting the positions of the holes in the cylindrical surface, the principle of equal angles in the same sector and the principle that a vernier caliper measures movement of a measured piece are ingeniously utilized, and changes of angle dimensions are reflected to the circular angle scale turntable; compared with conventional hole position measurement such as three-coordinate measurement, the method is more economical, convenient and rapid.

Description

Technical Field

[0001] The invention relates to the technical field of measuring tools for detecting the positions or positional degrees of holes on a cylindrical surface, and in particular to a measuring tool for detecting the positions of multiple holes on a cylindrical surface and a measuring method. Background Art

[0002] In the prior art, the position measurement tool of holes is generally three-coordinate. However, three-coordinate measurement of cylindrical holes requires modeling, which takes a long time. Sometimes it takes 1-2 days to provide test data, especially when the first piece inspection of new products is put into production and the debugging of newly compiled CNC machining programs is incomplete. The production is suspended due to the failure to provide test data in time, affecting the production progress. In addition, due to the different sizes of holes during the measurement process, the three-coordinate detection probe needs to be replaced many times, and the detection economy is not high. Summary of the invention

[0003] In view of this, the present invention proposes a multi-hole position detection measuring tool and a measuring method on a cylindrical surface, which can conveniently, quickly and economically solve the problem of accurately measuring the position or position accuracy of the holes.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A measuring tool for detecting the positions of holes on a cylindrical surface comprises a fixed base, on which a rotatable fillet measuring component and a fixed height measuring component are arranged, and a side piece is fixedly arranged on the fillet measuring component. By rotating the fillet measuring component to drive the measured piece to rotate together, the angle difference and height difference between the holes on the cylinder relative to a certain hole can be obtained.

[0006] As a further improvement of the above technical solution:

[0007] Preferably, the fillet measuring assembly includes a circular angle scale dial rotatably arranged on the roundness measuring base, coaxially rotatably arranged on the roundness measuring base, a connecting rod fixedly arranged on the roundness measuring base, a fixing nut threadedly connected to the upper end of the connecting rod, and a cover plate slidably arranged on the upper end of the connecting rod, and a measured object is fixedly arranged between the cover plate and the roundness measuring base.

[0008] Preferably, a fixed disk is coaxially fixedly disposed on the roundness measuring base.

[0009] Preferably, a stop ring is provided on the inner edge of the circular angle scale turntable.

[0010] Preferably, a zero calibration pointer slot is provided on the fixed base.

[0011] Preferably, the height measuring component is a height vernier caliper.

[0012] Preferably, the height measuring component is slidably disposed in a slide groove on the fixed base.

[0013] The present invention also provides a method for measuring the positions of holes on a cylindrical surface, comprising the following steps:

[0014] Step 1, insert the workpiece under test from the upper end of the connecting rod, and at the same time, the inner edge, outer edge or lower groove of the lower end of the workpiece under test fits with the blocking ring, so that the workpiece under test and the roundness measurement base are coaxial;

[0015] Step 2, insert the cover plate from the upper end of the connecting rod, and screw it in with a fixing nut so that the cover plate is close to the upper end of the side member, but not fixed;

[0016] Step 3. Rotate the measured object so that a certain hole reaches the zeroing pointer slot, rotate the circular angle scale dial so that the zero position of the circular angle scale dial reaches the zeroing pointer slot for zeroing, tighten the fixing nut so that the measured object, the circular angle scale dial, the roundness measurement base, and the cover plate form a fixed whole, and use a height vernier caliper to record the height of a certain hole. At this time, the certain hole is the reference hole;

[0017] Step 4. Rotate the workpiece to reach the next hole, and insert the height vernier caliper into the hole to obtain the relative angle and relative height between the next hole and the reference hole.

[0018] As a further improvement of the above technical solution:

[0019] Preferably, the step 4 also includes:

[0020] Step 41, when the next hole and the reference hole are in the same vertical plane, the height of the next hole can be directly measured by adjusting the height vernier caliper to obtain the relative height of the next hole, and the relative angle is zero.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1) The measuring tool for detecting the positions of holes on a cylindrical surface of the present invention cleverly utilizes the principle of equal angles within the same sector and the principle of measuring the movement of the measured object with a vernier caliper to reflect the change of the angle size on the circular angle scale dial; compared with conventional hole position measurement such as three-coordinate measurement, it is more economical, convenient and fast.

[0023] 2) The present invention has a novel structure and is easy to operate. The tested piece can be easily placed and taken out by simply loosening or tightening the cover of the connecting rod.

[0024] 3) The measuring tool for detecting the positions of holes on a cylindrical surface of the present invention has a circular angle scale dial installed on a base and is reinforced and stabilized by a fixed plate so that it can rotate smoothly and reliably; the height vernier caliper is installed in an open groove of the base to keep it always parallel to the measured piece and the contact points are on the same center line. The reasonable design of the size coordination of each part makes the mechanism possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the fixed base of the present invention;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the roundness measurement part of the present invention;

[0028] Figure 4 It is a schematic diagram of the cross-sectional structure of the roundness measurement part of the present invention;

[0029] Figure 5 It is a schematic diagram of the measurement process structure of the present invention.

[0030] In the figure: 1. Fixed base; 2. Roundness measuring base; 3. Fixed disk; 4. Circular angle scale dial; 5. Stop ring; 6. Connecting rod; 7. Fixed nut; 8. Cover plate; 9. Zeroing pointer slot; 10. Height vernier caliper; 11. Slide slot. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] As attached Figure 1 As shown, the technical solution includes three parts: 1. a fixed base 1; 2. a roundness measuring part; 3. a height measuring part;

[0035] By the attached Figure 2 It can be seen that a step hole is provided on the left side of the fixed base 1, a slide groove 11 is provided on the right side, and a zeroing pointer groove 9 is provided on the surface between the step hole and the slide groove 11;

[0036] As attached Figure 1 , Attachment Figure 3 With attached Figure 4 As shown, the roundness measuring part is arranged in the step hole on the left side of the fixed base 1, and the specific structure is as follows:

[0037] The roundness measuring part mainly includes a roundness measuring base 2 rotatably arranged in the step hole, a fixed plate 3 is coaxially fixedly arranged in the middle of the roundness measuring base 2, and the fixed plate 3 is stepped. The upper end of the fixed plate 3 is fixedly connected to the roundness measuring base 2 by bolts, and the lower end passes through the roundness measuring base 2 and is flush with the lower surface of the fixed base 1, so that the outer circle of the lower end of the fixed plate 3 contacts the inner wall of the lower end hole of the step hole of the fixed base 1, and the outer circle of the roundness measuring base 2 contacts the inner wall of the upper end hole of the step hole of the fixed base 1, so that no shaking occurs during the rotation process, thereby increasing the accuracy of the measurement result.

[0038] A circular angle scale dial 4 is also coaxially rotatably arranged on the roundness measuring base 2, and a stop ring 5 is arranged on the inner circle of the circular angle scale dial 4. The inner wall of the stop ring 5 should be in contact with the outer circle of the fixed disk 3, so that the circular angle scale dial 4 will not shake during the rotation process, and the coaxial center is always guaranteed.

[0039] A connecting rod 6 is threadedly connected in the middle of the fixing plate 3 , and a cover plate 8 is slidably removed from the upper end of the connecting rod 6 . Meanwhile, a fixing nut 7 is threadedly connected to the connecting rod 6 at the upper end of the cover plate 8 .

[0040] Therefore, the workpiece to be measured is placed between the roundness measuring base 2 and the cover plate 8 and is fastened as a whole by the fixing nut 7 .

[0041] As attached Figure 1As shown, the height measuring part is slidably arranged in the slide groove 11 on the right side of the fixed base 1, and its specific structure is a height vernier caliper 10. Although the height vernier caliper 10 is used in the accompanying drawings, realizing height measurement through a similar structure should also be a simple deformation of the present technical solution. For example, the height difference is measured by a ruler, a sliding block sliding up and down on the ruler, and a measuring rod sliding back and forth in the sliding block.

[0042] At the same time, a stop screw (not shown in the figure) can be set at the rear end of the slide slot 11 to prevent the height vernier caliper 10 from sliding back and forth, thereby keeping the height vernier caliper 10 stable and reliable when measuring the measured object.

[0043] As attached Figure 5 As shown, the measurement process of the present invention is:

[0044] Step 1, insert the measured object from the upper end of the connecting rod 6, and at the same time, the inner edge, outer edge or lower groove of the lower end of the measured object fits with the blocking ring (if they do not match, the corresponding circular angle scale dial 4 can be replaced), so that the measured object and the roundness measurement base 2 are coaxial;

[0045] Step 2: insert the cover plate 8 from the upper end of the connecting rod 6, and screw the fixing nut 7 in so that the cover plate 8 is close to the upper end of the side member, but not fixed;

[0046] Step 3, rotate the measured object so that a certain hole reaches the zeroing pointer slot 9, rotate the circular angle scale dial 4 so that the zero position of the circular angle scale dial 4 reaches the zeroing pointer slot 9 for zeroing, tighten the fixing nut 7, so that the measured object, the circular angle scale dial 4, the roundness measurement base 2, and the cover plate 8 form a fixed whole, and use the height vernier caliper 10 to record the height of a certain hole. At this time, the certain hole is the reference hole;

[0047] Step 4, rotate the measured piece to reach the next hole, and at the same time rotate the measured piece and move the height vernier caliper 10 to freely insert it into the measured hole to make it fully contact, so as to obtain the relative angle and relative height between the next hole and the reference hole.

[0048] When the next hole and the reference hole are in the same vertical plane, the height of the next hole can be directly measured by adjusting the height vernier caliper 10 to obtain the relative height of the next hole, and the relative angle is zero.

[0049] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-hole position detection measuring tool on a cylindrical surface, characterized in that: The invention comprises a fixed base (1), on which a rotatable fillet measuring component and a fixed height measuring component are arranged, and a side piece is fixedly arranged on the fillet measuring component. By rotating the fillet measuring component to drive the measured piece to rotate together, the angle difference and height difference between the hole on the cylinder and a certain hole can be obtained.

2. The multi-hole position detection measuring tool on a cylindrical surface according to claim 1, characterized in that: The round angle measuring assembly comprises a circular angle scale dial (4) rotatably arranged on the roundness measuring base (2), coaxially rotatably arranged on the roundness measuring base (2), a connecting rod (6) fixedly arranged on the roundness measuring base (2), a fixing nut (7) threadedly connected to the upper end of the connecting rod (6), and a cover plate (8) slidably arranged on the upper end of the connecting rod (6); a measured object is fixedly arranged between the cover plate (8) and the roundness measuring base (2).

3. The multi-hole position detection measuring tool on a cylindrical surface according to claim 2, characterized in that: The roundness measuring base (2) is coaxially fixedly provided with a fixed plate (3).

4. The multi-hole position detection measuring tool on a cylindrical surface according to claim 2, characterized in that: A stop ring (5) is provided on the inner edge of the circular angle scale rotating disk (4).

5. The multi-hole position detection measuring tool on a cylindrical surface according to claim 1, characterized in that: The fixed base (1) is provided with a zero calibration pointer slot (9).

6. The multi-hole position detection measuring tool on a cylindrical surface according to claim 1, characterized in that: The height measuring component is a height vernier caliper (10).

7. The multi-hole position detection measuring tool on a cylindrical surface according to claim 1 or 6, characterized in that: The height measuring component is slidably disposed in a slide groove (11) on the fixed base (1).

8. A method for measuring the position of multiple holes on a cylindrical surface, characterized in that: The following steps are involved: Step 1, insert the measured object through the upper end of the connecting rod (6), and at the same time, the inner edge, outer edge or lower end groove of the measured object is fitted with the blocking ring, so that the measured object and the roundness measuring base (2) are coaxial; Step 2, insert the cover plate (8) from the upper end of the connecting rod (6), and screw the fixing nut (7) in so that the cover plate (8) is close to the upper end of the side member, but not fixed; Step 3, rotate the measured object so that a certain hole reaches the zeroing pointer slot (9), rotate the circular angle scale dial (4) so ​​that the zero position of the circular angle scale dial (4) reaches the zeroing pointer slot (9) for zeroing, tighten the fixing nut (7), so that the measured object, the circular angle scale dial (4), the roundness measurement base (2), and the cover plate (8) form a fixed whole, and use a height vernier caliper (10) to record the height of a certain hole. At this time, the certain hole is the reference hole; Step 4: Rotate the workpiece to reach the next hole, and insert the height vernier caliper (10) into the hole to obtain the relative angle and relative height between the next hole and the reference hole.

9. The method for measuring the positions of multiple holes on a cylindrical surface according to claim 8, characterized in that: The step 4 also includes: Step 41, when the next hole and the reference hole are in the same vertical plane, the height of the next hole can be directly measured by adjusting the height vernier caliper (10), and the relative height of the next hole can be obtained, and the relative angle is zero.

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