Measuring tool and method for measuring angle of outer conical surface of cone

Abstract

The invention discloses a measuring tool for measuring the angle of the outer conical surface of a cone, which comprises a base, a measuring assembly, a conversion assembly and a reading assembly, and is characterized in that the measurement data of the measuring assembly is displayed in the reading assembly through the conversion assembly; the base is provided with a measuring assembly mounting position, a conversion assembly mounting position and a reading assembly mounting position and is used for mounting the measuring assembly, the conversion assembly and the reading assembly, the measuring assembly comprises a measuring tool body and a core rod arranged in the measuring tool body in a sliding manner, a pressure spring is arranged between the core rod and the measuring tool body, the measuring tool body is provided with a first conical surface, and the first conical surface is provided with a second conical surface. The core rod is provided with a first conical surface, three inserts are uniformly distributed on the first conical surface, three conical surfaces on the three inserts form a second conical surface, the core rod is provided with a third conical surface, and the second conical surface and the third conical surface are centrally coaxial and are positioning surfaces in contact with the conical surface of the calibration cone. The problem that large-batch and high-precision product detection cannot be realized by the existing conical surface angle detection equipment is solved.

Description

Technical Field

[0001] The invention belongs to the field of cone surface angle measuring equipment, and in particular relates to a measuring tool and method for measuring the outer cone surface angle of a cone. Background Art

[0002] In the prior art, the angle detection of external cone surface is generally carried out by conventional measuring tools such as universal angle rulers, or by three-dimensional coordinate measuring machine. However, these measurement methods cannot meet the technical requirements and detection efficiency for high-precision and large-scale measurement objects, and the detection cost is high. Summary of the invention

[0003] The purpose of the present invention is to provide a measuring tool for the angle of the outer conical surface of a cone, so as to solve the problem that the existing conical surface angle detection equipment cannot realize large-scale and high-precision product detection.

[0004] In order to solve the above problems, the present invention discloses a measuring tool for the angle of a cone outside a cone, comprising a base, a measuring component, a conversion component and a reading component, wherein the measurement data of the measuring component is displayed in the reading component through the conversion component; the base is provided with a measuring component installation position, a conversion component installation position and a reading component installation position for installing the measuring component, the conversion component and the reading component, the measuring component comprises a measuring body and a core rod slidably arranged in the measuring body, a compression spring is arranged between the core rod and the measuring body, a first conical surface is arranged on the measuring body, three inserts are evenly distributed on the first conical surface, and the three conical surfaces on the three inserts constitute a second conical surface, a third conical surface is arranged on the core rod, the second conical surface and the third conical surface keep their centers coaxial, and the second conical surface and the third conical surface are positioning surfaces in contact with the conical surface of the proofreading cone.

[0005] As a further improvement of the above technical solution: The reading component comprises a meter base, a clamp spring is arranged on the meter base, and a dial indicator is arranged in the clamp spring.

[0006] A threaded hole is arranged on one side of the table seat, a knurled flat head screw is arranged in the threaded hole, and the knurled flat head screw is in contact with the clamp spring.

[0007] The conversion component includes a lever seat, on which a lever is rotatably connected via a pin, the core rod contacts one side of the lever, and the dial indicator contacts the other side of the lever, and the movement of the core rod is transmitted to the dial indicator through the lever to obtain a reading.

[0008] The device is specifically provided with an air hole, which can prevent the core rod from being unable to operate normally due to poor internal airflow.

[0009] The first conical surface, the second conical surface and the third conical surface have equal cone angles.

[0010] A handle is provided inside the proofreading cone, and the proofreading cone can be conveniently carried by designing the handle.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The measuring tool for measuring the angle of the outer cone surface of a cone of the present invention utilizes a lever structure and a helical spring structure that bears pressure to reflect the change of the angle of the outer cone surface to be measured on a dial indicator, thereby solving the problem that conventional measuring tools such as universal angle rulers cannot perform high-precision and large-scale measurements. The invention has novel structure and convenient operation. The product can be loaded and taken out only by holding the workpiece by hand. The angle of the outer cone surface can be measured by pressing the workpiece by hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the internal structure of the measuring tool for measuring the angle of the outer conical surface of a cone according to the present invention; Figure 2 It is a schematic diagram of the top view and cross-sectional view of the base structure of the present invention; Figure 3 The present invention is a schematic diagram of a specific top view and a cross-sectional structure; Figure 4 It is a schematic diagram of the core rod structure of the present invention.

[0013] Figure numerals: 1. base; 2. lever; 3. dial base; 4. knurled flat head screw; 5. clip spring; 6. pin; 7. lever base; 8. hexagonal nut; 10. compression spring; 11. hexagon socket cylindrical head screw; 12. core rod; 13. measuring body; 14. calibration cone; 15. slotted pan head screw; 16. insert; 17. handle; 18. calibration cone surface; 19. second cone surface; 20. first cone surface; 21. third cone surface; 22. upper right plane of lever; 23. upper left plane of lever; 24. dial indicator; 131. air hole. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0015] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions 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 operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present embodiment discloses a measuring tool for measuring the angle of the outer conical surface of a cone, comprising a base 1, on which a measuring component, a conversion component and a reading component are installed, which correspond to a measuring body 13, a lever seat 7 and a dial seat 3 respectively. A first conical surface 20 is provided on the measuring body 13, and three inserts 16 are evenly distributed on the first conical surface 20. The three conical surfaces on the three inserts 16 form a second conical surface 19. A third conical surface 21 is provided on the core rod 12. The second conical surface 19 and the first conical surface 20 keep their centers coaxial, and are respectively positioning surfaces in contact with the proofreading conical surface 18 of the proofreading cone 14. A clamping spring 5 is installed on the dial seat 3, and a dial indicator 24 is installed in the clamping spring 5. A lever 2 is installed on the lever seat 7 through a pin 6. The core rod 12 slides up and down along the inner hole of the measuring body 13. When pressed down, the probe of the core rod 12 touches the upper right plane 22 of the lever, and the lever 2 rotates around the pin 6. When the lever is lifted, the upper left plane 23 touches the probe of the dial indicator 24, and the dial indicator 24 displays the angle reading.

[0019] The first conical surface 20, the second conical surface 19 and the third conical surface 21 have the same cone angle. The cone angle of the first conical surface 20 is 55°30', the cone angle of the second conical surface 19 is 55°30', and the cone angle of the third conical surface 21 is 55°30'.

[0020] The cone angle of the calibration cone 14 is 55°30′±30″, and its roundness is not greater than 0.005 mm.

[0021] The coaxiality of the inner and outer circles of the core rod 12 is not greater than 0.008 mm.

[0022] The coaxiality between the inner cone of the insert 16 and the inner hole of the measuring body 13 is not greater than 0.008 mm.

[0023] The base 1 is provided with a waist-shaped and circular stepped combination hole, and the lever seat 7 is installed in the circular hole of the base 1, and is oriented in the waist-shaped groove of the base 1 through the two side planes on the lever seat 7. The lever seat 7 should be lower than the plane of the base 1.

[0024] The base 1 is provided with three M8 screw holes, and the measuring body 13 is installed in the holes of the base 1 and is locked by three hexagon socket head screws 11.

[0025] The meter base 3 is provided with an external thread, and an M6 screw hole is provided on the outer circumference. The clamp spring 5 is installed in the hole of the meter base 3, and the dial indicator 24 is installed in the clamp spring 5 and fixed by a knurled flat head screw 4.

[0026] The base 1 is provided with a screw hole with a countersunk platform, the table seat 3 is connected with the base 1 through an internal thread, and the end surface of the step hole is fitted.

[0027] The measuring body 13 is provided with three equal grooves, and three inserts 16 are installed on the measuring body 13 through slotted pan head screws 15. The conical surface on the insert 16 should be coaxial with the inner hole of the clamp body 13. A φ6 circular hole is provided on the outer circumference of the measuring body 13 as an air hole 131 to play a role in exhaust.

[0028] The core rod 12 is provided with an external thread, and the compression spring 10 is sleeved on the small outer circle of the core rod 12. The core rod 12 is installed in the central hole of the measuring body 13 and locked by the hexagonal nut 8. The height of the ball head on the core rod 12 is adjusted by the hexagonal nut 8. The external force realizes the core rod 12 to move up and down along the inner wall of the hole of the measuring body 13 through the action of the compression spring 10. In the absence of external force, the inner conical surface of the core rod 12 should be higher than the first conical surface 20 of the measuring body.

[0029] A handle 17 is provided on the proofreading cone 14 to enable the proofreading cone 14 to be taken out and placed.

[0030] The measuring tool for measuring the angle of the outer cone surface of a cone of the present invention is suitable for measuring the angle of the outer cone surface with high precision and in large quantities, and the positioning part of the workpiece to be measured is an outer cone. The insert 16 supports the upper part of the outer cone surface, and the core rod 12 elastically supports the lower part of the outer cone surface, which restricts 5 degrees of freedom in total, thereby realizing the positioning function.

[0031] The present invention adopts a lever structure and utilizes a helical spring structure that bears pressure to solve the problem of arbitrary rotation and movement of parts in the prior art. By compressing the compression spring, the core rod moves downward, the part is pressed against the positioning cone, and the center of the part is automatically centered, thereby realizing the workpiece installation and measurement functions. The present invention implements automatic centering and positioning of the parts, ensuring the positioning accuracy of the parts.

[0032] This embodiment discloses a method for measuring the angle of a cone surface outside a cone, comprising the following steps: S1. Before measuring, the calibration cone 14 is loaded into the measuring body 13. The outer cone surface of the cone completely contacts the second cone surface 19 and the third cone surface 21 by its own gravity. The compression spring 10 compresses the core rod 12 to move downward. The probe of the core rod 12 contacts the upper right plane 22 of the lever. The left end of the lever 2 is lifted. The lever 2 rotates around the pin 6 and the left end is lifted. S2. Install the dial indicator 24 into the clamp spring 5 of the dial base 3, make the probe of the dial indicator 24 contact the upper left plane 23 of the lever, tighten the knurled flat head screw 4, adjust the dial indicator 24 to zero, and complete the calibration of the measuring tool; S3, lift and withdraw the proofreading cone 14; S4, the lower part of the outer cone surface of the workpiece is in contact with the third cone surface on the core rod, and the workpiece is pressed vertically downward by hand, so that the upper part of the workpiece is completely in contact with the second cone surface, the compression spring compresses the core rod downward, and the center of the workpiece is automatically centered; S5. After the workpiece is completely centered and positioned, the probe of the core rod 12 contacts the upper right plane 22 of the lever, the lever 2 rotates around the pin 6, the left end is lifted, and the dial indicator 24 reflects the reading. At this time, the reading displayed by the dial indicator 24 is the measured value of the outer cone angle. When the reading is within ±0.052mm, it is qualified. For every 1' change in angle, the position of the core rod 12 changes by 0.026mm, and ±2' is ±0.052mm.

[0033] The above is only an embodiment of the present invention, and the common sense such as the known specific structure and characteristics in the scheme is not described in detail here. 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 the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A measuring tool for measuring the angle of the outer conical surface of a cone, characterized in that: The invention comprises a base (1), a measuring component, a conversion component and a reading component, wherein the measurement data of the measuring component is displayed in the reading component through the conversion component; the base (1) is provided with a measuring component installation position, a conversion component installation position and a reading component installation position for installing the measuring component, the conversion component and the reading component; the measuring component comprises a measuring body (13) and a core rod (12) slidably arranged in the measuring body (13); a compression spring (10) is arranged between the core rod (12) and the measuring body (13) ), the measuring body (13) is provided with a first conical surface (20), three inserts (16) are evenly distributed on the first conical surface (20), the three conical surfaces on the three inserts (16) form a second conical surface (19), the core rod (12) is provided with a third conical surface (21), the second conical surface (19) and the third conical surface (21) keep the center coaxial, the second conical surface (19) and the third conical surface (21) are positioning surfaces in contact with the conical surface of the calibration cone (14).

2. The measuring tool for measuring the angle of the outer conical surface of a cone according to claim 1, characterized in that: The reading assembly comprises a meter base (3), a clamp spring (5) is mounted on the meter base (3), and a dial indicator (24) is mounted inside the clamp spring (5).

3. The measuring tool for measuring the angle of the outer conical surface of a cone according to claim 1, characterized in that: A threaded hole is provided on one side of the table base (3), a knurled flat head screw (4) is provided in the threaded hole, and the knurled flat head screw (4) is in contact with a clamp spring (5).

4. The measuring tool for measuring the angle of the outer conical surface of a cone according to claim 2, characterized in that: The conversion assembly comprises a lever seat (7), the lever seat (7) is rotatably connected to a lever (2) via a pin (6), the core rod (12) is in contact with one side of the lever (2), and the dial indicator (24) is in contact with the other side of the lever (2), so that the movement of the core rod (12) is transmitted to the dial indicator (24) via the lever (2) to obtain a reading.

5. The measuring tool for measuring the angle of the outer conical surface of a cone according to claim 3, characterized in that: The measuring body (13) is provided with an air hole (131).

6. The measuring tool for measuring the angle of the outer conical surface of a cone according to claim 4, characterized in that: The first conical surface (20), the second conical surface (19) and the third conical surface (21) have the same cone angle.

7. The measuring tool for measuring the angle of the outer conical surface of a cone according to claim 5, characterized in that: A handle (17) is provided inside the calibration cone (14).

8. A method for measuring the angle of the outer conical surface of a cone, based on the measuring tool for measuring the angle of the outer conical surface of a cone according to claim 7, characterized in that: The following steps are involved: S1. Before measurement, the calibration cone (14) is loaded into the measuring body (13). The outer cone surface of the calibration cone (14) is completely in contact with the second cone surface (19) and the third cone surface (21) by its own weight. The compression spring (10) is compressed, the core rod (12) moves downward, the probe of the core rod (12) contacts the right plane of the lever (2), the left end of the lever (2) is lifted, and the lever (2) rotates around the pin (6), and the left end is lifted; S2. Install the dial indicator (24) into the clamp spring (5) of the dial indicator base (3), make the probe of the dial indicator (24) contact the left plane of the lever (2), tighten the knurled flat head screw (4), adjust the dial indicator (24) to zero, and complete the calibration of the measuring tool; S3, lift the calibration cone (14) and withdraw it from the measuring tool (13); S4, the lower part of the outer conical surface of the workpiece to be measured is brought into contact with the third conical surface (21) on the core rod (12), and the workpiece is pressed vertically downward by hand, so that the upper part of the workpiece is completely in contact with the second conical surface (19), the compression spring (10) is compressed, the core rod (12) moves downward, and the center of the workpiece is automatically centered; S5. After the workpiece to be measured is completely centered and positioned, the probe of the core rod (12) contacts the right plane of the lever (2), the lever (2) rotates around the pin, the left end is lifted, and the dial indicator (24) responds to the reading. The reading displayed by the dial indicator is the measured value of the outer cone angle. When the reading is within ±0.052mm, it is qualified.

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