Orifice chamfer opening taper size measuring clamp
By incorporating a reading amplification device into the orifice chamfering measuring fixture, the problem of existing equipment being unable to accurately measure orifice chamfers has been solved, enabling efficient and accurate measurement of orifice chamfer dimensions and improving part quality and production efficiency.
Patent Information
- Application Number
- CN202423161666.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing measuring instruments and equipment cannot efficiently or accurately measure the actual value of the chamfer at the orifice, resulting in inaccurate measurement results that affect the quality and service life of parts.
A measuring fixture for the chamfering taper of an orifice was designed. By setting a reading amplification device between the measuring rod and the dial indicator, and utilizing the cooperation of the first piston, the second piston, and the flow channel in the reading amplification device, the movement stroke of the measuring rod is amplified to the stroke of the second piston, thereby displaying the amplified degree on the dial indicator and realizing the accurate calculation of the orifice chamfering size.
This improves the accuracy of orifice chamfer dimension measurement, ensures the reliability of measurement results, and avoids part scrapping and increased production costs due to measurement errors.
Smart Images
Figure CN223551050U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of pipe fitting clamps, and relates to a clamp for measuring the chamfered opening taper dimension of an orifice. Background Technology
[0002] To ensure the quality and service life of parts and meet assembly requirements, more and more parts have extremely strict requirements on the size difference of the chamfer at the opening. For example, the chamfer at the bearing mounting hole requires that the size difference between the two ends of the chamfer be controlled within 0.05. Whether the chamfer size is qualified will directly affect whether the bearing can be effectively closed after assembly, thereby reducing the overall performance and service life of the product.
[0003] Currently available measuring instruments and equipment can accurately measure the actual value of chamfer dimensions, such as coordinate measuring machines (CMMs), imaging systems, and plug gauges. However, these methods cannot efficiently or accurately measure the actual chamfer size. While CMMs can accurately measure chamfer dimensions, in actual production, measuring the chamfer dimension of every part using a CMM would consume significant resources and delay the inspection time of other parts. Furthermore, CMM inspection requires removing the part from the machine tool. If the chamfer dimension is found to be substandard, the part must be reprocessed, and repeated positioning increases the risk of part scrap, further delaying production time. It can even lead to clamping deviations, preventing the tool from following the original toolpath, or resulting in excessive tool marks, ultimately scrapping the part and increasing production costs. Imaging instruments can also detect the actual chamfer dimensions of orifices, but during measurement, burrs at the chamfer significantly affect the measurement values, leading to inaccurate results. Removing the burrs before measurement results in an overly smooth chamfer edge, affecting visual judgment and requiring high technical skills from the measurement personnel, resulting in inaccurate and inefficient measurements. Furthermore, as measurement time increases, operator fatigue leads to greater fluctuations in results, potentially causing qualified parts to be deemed unqualified and unqualified parts to be deemed qualified. More seriously, this can significantly reduce product performance and lifespan after assembly. Using plug gauges can only ensure the chamfer is qualified at each point, but cannot measure the actual chamfer size or compare the differences between the two ends. Even for products that do not specify requirements for the difference in chamfer size at both ends, using this method may result in uneven wear at both ends of the orifice due to chamfer asymmetry, affecting product lifespan and causing both economic and reputational losses.
[0004] Existing technologies also include structures that use plug gauges and dial indicators to measure chamfer dimensions. However, due to the minute size of the chamfer, the final reading on the dial indicator shows very little change. When high precision is required for the chamfer dimensions, the accuracy of the chamfer dimension readings obtained by the traditional plug gauge and dial indicator combination is insufficient, leading to errors in the final chamfer dimension calculation.
[0005] Therefore, in view of the above-mentioned problems of existing chamfer measuring devices, this utility model discloses a measuring fixture for the chamfer opening taper size of a hole. Utility Model Content
[0006] The purpose of this utility model is to provide a measuring fixture for the chamfer taper dimension of an orifice, which can magnify and display the travel of the measuring rod on a dial indicator when the plug gauge is inserted into the orifice, ensuring the accuracy of the travel reading and thus guaranteeing the accuracy of the final orifice chamfer dimension calculation result.
[0007] This utility model is achieved through the following technical solution:
[0008] A measuring fixture for measuring the taper dimension of an orifice chamfer includes a measuring sleeve. A measuring rod is slidably disposed inside the measuring sleeve. The measuring end of the measuring rod extends to the outside of the measuring sleeve and is coaxially disposed with a measuring plug gauge. The working end of the measuring rod is located inside the measuring sleeve. A dial indicator is disposed at the end of the measuring sleeve away from the measuring plug gauge. The measuring head of the dial indicator extends to the inside of the measuring sleeve. A reading amplification device is disposed between the working end of the measuring rod and the measuring head of the dial indicator. One end of the reading amplification device abuts against the working end of the measuring rod, and the other end of the reading amplification device abuts against the measuring head of the dial indicator.
[0009] Insert the measuring plug gauge into the hole to be measured. At this time, the chamfer of the hole acts on the measuring plug gauge, which in turn drives the measuring rod to move. The stroke of the measuring rod acts on one end of the reading amplification device. The reading amplification device amplifies the stroke and then acts on the measuring rod of the dial indicator, which can then display the amplified stroke on the dial indicator. The actual stroke of the measuring plug gauge and the measuring rod can be calculated by the dial indicator reading and the stroke amplification factor of the reading amplification device. By using the trigonometric function relationship between the actual stroke and the angle of the hole chamfer, the dimension value of the hole chamfer can be calculated.
[0010] To better realize this utility model, the reading amplification device further includes a first piston and a second piston. The first piston and the second piston are slidably disposed inside the measuring sleeve. The first piston abuts against the working end of the measuring rod, and the second piston abuts against the measuring head of the dial indicator. A flow channel is provided between the first piston and the second piston, and the inner diameter of the flow channel is less than the diameter of the second piston and less than the diameter of the first piston.
[0011] To better realize this utility model, the measuring sleeve is further provided with an adapter inner sleeve. The adapter inner sleeve is provided with a first piston chamber at one end near the measuring rod, and a second piston chamber is provided at the other end near the dial indicator. A first piston is slidably disposed inside the first piston chamber, and a second piston is slidably disposed inside the second piston chamber. The first piston chamber and the second piston chamber are connected by a flow channel.
[0012] To better realize this utility model, a first return spring is further provided between the first piston and the end of the first piston chamber away from the connecting rod, and a second return spring is provided between the second piston and the end of the second piston chamber near the dial indicator.
[0013] To better realize this utility model, a radial locking member is further provided on the side wall of the measuring sleeve near the dial indicator. One end of the radial locking member extends into the interior of the measuring sleeve and tightens and fixes the measuring head of the dial indicator.
[0014] To better realize this utility model, a bushing is further provided between the outer side of the measuring head of the dial indicator and the inner wall of the measuring sleeve, and the end of the radial locking member abuts against the outer side of the bushing.
[0015] To better realize this utility model, a measuring rod locking member is further provided on the side wall between the two ends of the measuring sleeve, and one end of the measuring rod locking member extends into the interior of the measuring sleeve and abuts against the outer side of the measuring rod.
[0016] To better realize this utility model, a positioning plate is further provided at one end of the measuring sleeve near the measuring plug gauge, and a positioning end face is provided on the side of the positioning plate near the measuring plug gauge, the positioning end face being perpendicular to the axis of the measuring sleeve.
[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0018] This invention incorporates a reading amplification device between the measuring rod and the measuring head of the dial indicator. Through the cooperation of the first piston, the second piston, and the flow channel in the reading amplification device, the travel of the measuring rod can be amplified by a certain factor to the travel of the second piston. This amplifies the final reading on the dial indicator, effectively magnifying the minute travel of the measuring rod, ensuring more accurate readings, and ultimately guaranteeing the accuracy of the orifice chamfer size calculation. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the measuring fixture.
[0020] Figure 2This is a schematic diagram of the reading amplification device;
[0021] Figure 3 This is a schematic diagram showing the installation of the first and second reset springs;
[0022] Figure 4 This is a schematic diagram for calculating the chamfer dimensions of the orifice.
[0023] Wherein: 1-Measuring sleeve; 2-Measuring rod; 3-Measuring plug gauge; 4-Dial indicator; 5-Reading amplification device; 6-Radial locking element; 7-Bushing; 8-Measuring rod locking element; 9-Positioning plate; 51-First piston; 52-Second piston; 53-Flow channel; 54-Adapter inner sleeve; 100-First piston chamber; 200-Second piston chamber; 111-First return spring; 222-Second return spring. Detailed Implementation
[0024] The following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.
[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly indicated by the present invention, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0026] For ease of description, the words "up," "down," "left," and "right" appearing in this utility model only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0027] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0028] Example 1:
[0029] This embodiment provides a fixture for measuring the taper dimension of an orifice with a chamfered opening, such as... Figures 1-3 As shown, the device includes a measuring sleeve 1, a measuring rod 2 slidably disposed inside the measuring sleeve 1, a measuring end of the measuring rod 2 extending to the outside of the measuring sleeve 1 and coaxially disposed with a measuring plug gauge 3, the working end of the measuring rod 2 located inside the measuring sleeve 1, a dial indicator 4 disposed at the end of the measuring sleeve 1 away from the measuring plug gauge 3, the measuring head of the dial indicator 4 extending to the inside of the measuring sleeve 1, a reading amplification device 5 disposed between the working end of the measuring rod 2 and the measuring head of the dial indicator 4, one end of the reading amplification device 5 abutting against the working end of the measuring rod 2, and the other end of the reading amplification device 5 abutting against the measuring head of the dial indicator 4.
[0030] The specific measurement steps are as follows:
[0031] Step 1: Prepare a standard test block. The standard test block has a standard hole with a chamfer angle and a hole diameter that are known to be standard. Insert the measuring plug gauge 3 into the standard hole and read the reading of the dial indicator 4 at this time. Zero the reading of the dial indicator 4.
[0032] Step 2: Insert the measuring plug gauge 3 into the hole to be measured, and make the end face of the measuring sleeve 1 in close contact with the end face of the hole. At this time, the chamfered conical surface of the hole to be measured acts on the measuring plug gauge 3 and drives the measuring plug gauge 3 and the measuring rod 2 to move.
[0033] Step 3: The action end of the measuring rod 2 moves and acts on the reading amplification device 5. The reading amplification device 5 amplifies the travel of the measuring rod 2 by a calibrated factor and then acts on the measuring head of the dial indicator 4.
[0034] Step 4: Read the reading of dial indicator 4 at this time. This is the axial travel of measuring rod 2 after magnification and calibration. Using the trigonometric relationship between the axial travel, the chamfer angle of the orifice, and the orifice diameter, as shown... Figure 4 As shown, the chamfer opening size can be calculated.
[0035] The specific solution formula is as follows:
[0036] Dx = D + 2tanα·X;
[0037] Where: Dx represents the chamfer opening size; D represents the orifice diameter; X represents the actual axial travel of the measuring rod; α represents the chamfer angle of the orifice.
[0038] Example 2:
[0039] A measuring fixture for measuring the chamfered taper of an orifice, an improvement upon embodiment 1, as follows: Figure 2 and Figure 3As shown, the reading amplification device 5 includes a first piston 51 and a second piston 52. The first piston 51 and the second piston 52 are slidably disposed inside the measuring sleeve 1. The first piston 51 abuts against the working end of the measuring rod 2, and the second piston 52 abuts against the measuring head of the dial indicator 4. A flow channel 53 is provided between the first piston 51 and the second piston 52. The inner diameter of the flow channel 53 is less than the diameter of the second piston 52 and less than the diameter of the first piston 51.
[0040] When the connecting rod 2 moves axially under the drive of the measuring plug gauge 3, the working end of the connecting rod 2 abuts against the first piston 51 and drives the first piston 51 to move. The flow channel 53 is filled with hydraulic oil. When the first piston 51 moves, it squeezes the hydraulic oil, so that the hydraulic oil acts on the second piston 52 through the flow channel 53. Since the inner diameter of the flow channel 53 is less than the diameter of the second piston 52 and less than the diameter of the first piston 51, the stroke of the first piston 51 will be amplified to the stroke of the second piston 52. When the second piston 52 moves, it acts on the measuring head of the dial indicator 4, thereby amplifying the reading of the dial indicator 4, making it easier to read the stroke value more clearly and accurately.
[0041] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.
[0042] Example 3:
[0043] A measuring fixture for measuring the chamfered taper of an orifice, an improvement upon embodiment 1 or 2, such as... Figure 2 and Figure 3 As shown, the measuring sleeve 1 has an inner adapter sleeve 54 inside. The inner adapter sleeve 54 has a first piston chamber 100 at one end near the measuring rod 2 and a second piston chamber 200 at the other end near the dial indicator 4. A first piston 51 is slidably disposed inside the first piston chamber 100 and a second piston 52 is slidably disposed inside the second piston chamber 200. The first piston chamber 100 and the second piston chamber 200 are connected by a flow channel 53.
[0044] The first piston chamber 100, the second piston chamber 200, and the flow channel 53 are filled with hydraulic oil. When the first piston 51 moves under the drive of the measuring rod 2, it squeezes the hydraulic oil in the first piston chamber 100 and the flow channel 53 into the second piston chamber 200. Since the inner diameter of the flow channel 53 is less than the diameter of the second piston 52 and less than the diameter of the first piston 51, the hydraulic oil discharged from the first piston chamber 100 will drive the second piston 52 to move a larger stroke. The second piston 52 acts on the measuring head of the dial indicator 4 to display the magnified stroke of the measuring rod 2 on the dial indicator 4.
[0045] The other parts of this embodiment are the same as those in Embodiment 1 or 2, so they will not be described again.
[0046] Example 4:
[0047] A fixture for measuring the chamfered taper dimension of an orifice, improved based on any one of embodiments 1-3, such as... Figure 3 As shown, a first return spring 111 is provided between the first piston 51 and the end of the first piston chamber 100 away from the connecting rod 2, and a second return spring 222 is provided between the second piston 52 and the end of the second piston chamber 200 near the dial indicator 4. When the first piston 51 moves, it compresses the first return spring 111, and when the second piston 52 moves, it stretches the second return spring 222. After the external force is removed, the rebound action of the first return spring 111 and the second return spring 222 causes the first piston 51 and the second piston 52 to return to their initial balanced positions, ready for the next measurement.
[0048] The other parts of this embodiment are the same as any one of embodiments 1-3, so they will not be described again.
[0049] Example 5:
[0050] A fixture for measuring the chamfered taper dimension of an orifice, improved based on any one of embodiments 1-4, such as... Figure 1 As shown, a radial locking member 6 is provided on the side wall of the measuring sleeve 1 near the dial indicator 4. One end of the radial locking member 6 extends into the interior of the measuring sleeve 1 and tightens and fixes the measuring head of the dial indicator 4.
[0051] When measuring the plug gauge 3, after zeroing the dial indicator 4, the measuring head of the dial indicator 4 is tightened and fixed by the radial locking member 6, so that the dial indicator 4 is fixed at zero.
[0052] Furthermore, a bushing 7 is provided between the outer side of the measuring head of the dial indicator 4 and the inner wall of the measuring sleeve 1, and the end of the radial locking member 6 abuts against the outer side of the bushing 7. By providing the bushing 7, the radial locking member 6 acts on the outside of the bushing 7, avoiding direct action of the radial locking member 6 on the outside of the measuring head of the dial indicator 4, and preventing damage to the measuring head of the dial indicator 4.
[0053] Furthermore, the radial locking member 6 is a locking screw threaded onto the side wall of the measuring sleeve 1.
[0054] The other parts of this embodiment are the same as any one of embodiments 1-4, so they will not be described again.
[0055] Example 6:
[0056] A fixture for measuring the chamfered taper dimension of an orifice, improved based on any one of embodiments 1-5, such as... Figure 1As shown, a measuring rod locking member 8 is provided on the side wall between the two ends of the measuring sleeve 1. One end of the measuring rod locking member 8 extends into the interior of the measuring sleeve 1 and abuts against the outer side of the measuring rod 2.
[0057] After the measuring plug gauge 3 is inserted into the hole, the side of the measuring rod 2 can be pressed and fixed by the measuring rod locking piece 8 to prevent the measuring rod 2 from moving during subsequent readings and causing the dial gauge 4 reading to fluctuate. At the same time, it can also prevent the measuring rod 2 from coming out of the measuring sleeve 1.
[0058] The other parts of this embodiment are the same as any one of embodiments 1-5, so they will not be described again.
[0059] Example 7:
[0060] A fixture for measuring the chamfered taper dimension of an orifice, improved based on any one of embodiments 1-6, such as... Figure 1 As shown, a positioning plate 9 is provided at one end of the measuring sleeve 1 near the measuring plug gauge 3, and a positioning end face is provided on the side of the positioning plate 9 near the measuring plug gauge 3, and the positioning end face is perpendicular to the axis of the measuring sleeve 1.
[0061] During measurement, the positioning end face of the positioning disk 9 is aligned with the end face of the orifice to ensure that the axis of the measuring sleeve 1 is perpendicular to the end face of the orifice, thereby ensuring the accuracy of subsequent measurements.
[0062] The other parts of this embodiment are the same as any one of embodiments 1-6, so they will not be described again.
[0063] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A measuring fixture for measuring the taper dimension of an orifice chamfer, comprising a measuring sleeve (1), wherein a measuring rod (2) is slidably disposed inside the measuring sleeve (1), characterized in that, The measuring end of the measuring rod (2) extends to the outside of the measuring sleeve (1) and is coaxially provided with a measuring plug gauge (3). The working end of the measuring rod (2) is located inside the measuring sleeve (1). A dial indicator (4) is provided at the end of the measuring sleeve (1) away from the measuring plug gauge (3). The measuring head of the dial indicator (4) extends to the inside of the measuring sleeve (1). A reading amplification device (5) is provided between the working end of the measuring rod (2) and the measuring head of the dial indicator (4). One end of the reading amplification device (5) abuts against the working end of the measuring rod (2), and the other end of the reading amplification device (5) abuts against the measuring head of the dial indicator (4).
2. The orifice chamfering taper dimension measuring fixture according to claim 1, characterized in that, The reading amplification device (5) includes a first piston (51) and a second piston (52). The first piston (51) and the second piston (52) are slidably disposed inside the measuring sleeve (1). The first piston (51) abuts against the working end of the measuring rod (2), and the second piston (52) abuts against the measuring head of the dial indicator (4). A flow channel (53) is provided between the first piston (51) and the second piston (52). The inner diameter of the flow channel (53) is less than the diameter of the second piston (52) and less than the diameter of the first piston (51).
3. A fixture for measuring the chamfered taper dimension of an orifice according to claim 2, characterized in that, The measuring sleeve (1) is provided with an adapter inner sleeve (54). The adapter inner sleeve (54) is provided with a first piston chamber (100) at one end near the measuring rod (2) and a second piston chamber (200) at one end near the dial indicator (4). A first piston (51) is slidably disposed inside the first piston chamber (100) and a second piston (52) is slidably disposed inside the second piston chamber (200). The first piston chamber (100) and the second piston chamber (200) are connected by a flow channel (53).
4. A fixture for measuring the chamfered taper dimension of an orifice according to claim 3, characterized in that, A first return spring (111) is provided between the first piston (51) and the end of the first piston chamber (100) away from the measuring rod (2), and a second return spring (222) is provided between the second piston (52) and the end of the second piston chamber (200) close to the dial indicator (4).
5. A fixture for measuring the chamfered taper dimension of an orifice according to any one of claims 1-4, characterized in that, A radial locking member (6) is provided on the side wall of the measuring sleeve (1) near the dial indicator (4). One end of the radial locking member (6) extends into the interior of the measuring sleeve (1) and tightens and fixes the measuring head of the dial indicator (4).
6. A fixture for measuring the chamfered taper dimension of an orifice according to claim 5, characterized in that, A bushing (7) is provided between the outer side of the measuring head of the dial indicator (4) and the inner wall of the measuring sleeve (1), and the end of the radial locking member (6) abuts against the outer side of the bushing (7).
7. A fixture for measuring the chamfered taper dimension of an orifice according to any one of claims 1-4, characterized in that, A measuring rod locking member (8) is provided on the side wall between the two ends of the measuring sleeve (1). One end of the measuring rod locking member (8) extends into the interior of the measuring sleeve (1) and abuts against the outer side of the measuring rod (2).
8. A fixture for measuring the chamfered taper dimension of an orifice according to any one of claims 1-4, characterized in that, The measuring sleeve (1) is provided with a positioning plate (9) at one end near the measuring plug gauge (3). The positioning plate (9) is provided with a positioning end face on the side near the measuring plug gauge (3). The positioning end face is perpendicular to the axis of the measuring sleeve (1).