CN115164679A - Crankshaft counterweight block radius detection tool and detection method - Google Patents
Crankshaft counterweight block radius detection tool and detection method Download PDFInfo
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- CN115164679A CN115164679A CN202211028824.0A CN202211028824A CN115164679A CN 115164679 A CN115164679 A CN 115164679A CN 202211028824 A CN202211028824 A CN 202211028824A CN 115164679 A CN115164679 A CN 115164679A
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- balancing weight
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- radius
- central shaft
- gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention belongs to the technical field of production of crankshaft balancing weights, and particularly relates to a crankshaft balancing weight radius detection tool and a detection method. The checking fixture comprises a meter frame, a dial indicator and a dial gauge, wherein the meter frame comprises a horizontal beam and two leg rods, a vertical through hole for mounting the dial indicator is formed in one side of the beam, a supporting block is arranged at the bottom of each leg rod, the dial gauge comprises two supporting disks with equal radiuses, a mounting seat for mounting a balancing weight to be detected, a calibration disk, a central shaft and a base frame seat, when the checking fixture is used, the dial indicator is mounted in the vertical through hole with the measuring rod facing downwards, the supporting surfaces at the bottoms of the two leg rods are respectively supported by the cylindrical surfaces of the two supporting disks, the balancing weight to be detected is mounted on the mounting seat with the side surface perpendicular to the central shaft and the outer circular surface facing upwards, after the dial indicator is reset to zero by using the calibration disk, the radius of the balancing weight to be detected can be detected by rotating 180 degrees horizontally, and the radius of the balancing weight can be detected on line.
Description
Technical Field
The invention belongs to the technical field of production of crankshaft balancing weights, and particularly relates to a crankshaft balancing weight radius detection tool and a detection method.
Background
The large crankshaft generally adopts a structure that the crankshaft body and the balancing weight are separated, during processing, the crankshaft body and the balancing weight are processed separately, and after the processing, the balancing weight is assembled with the crankshaft body through a bolt. Referring to fig. 4, the weight member includes a fan-shaped structure having a cylindrical surface and an assembling surface opposite to the cylindrical surface, and the weight member is provided with an assembling through hole for mounting a bolt therethrough. When the balancing weights are produced in batches, the radius of the balancing weights (excircle) needs to be frequently detected so as to ensure that the deviation between the product radius and the design radius is less than a specified value; the center of the excircle of the balancing weight is not positioned on an assembly surface, the radius measurement lacks a reference surface, direct measurement cannot be carried out, and only a three-coordinate measuring machine can be used for detection, the three-coordinate measuring machine is not special equipment for detecting the radius of the balancing weight, and the three-coordinate measuring machine needs a constant temperature and humidity condition when being used, has high environmental requirements and is not suitable for online detection of the radius of the balancing weight.
Disclosure of Invention
The invention aims to provide a crankshaft counterweight block radius detection tool which is simple in structure, convenient to use and capable of performing online detection.
The technical scheme for achieving the purpose comprises the following contents.
A checking fixture for the radius of a crankshaft counterweight block comprises a gauge stand, a dial indicator and a gauge,
the dial gauge comprises a cross beam and two leg rods, wherein the cross beam is horizontally arranged, one side of the cross beam is provided with a vertical through hole for mounting the dial gauge, the two leg rods are vertically arranged and symmetrically arranged at two ends of the cross beam, the top ends of the leg rods are connected with the cross beam, the bottom of each leg rod is provided with a supporting block, the bottom of each supporting block is provided with a concave supporting surface,
the calibration gauge comprises two supporting disks with equal radiuses, a matching seat for mounting the balancing weight to be tested, a calibration disk, a central shaft and a chassis seat, wherein the central shaft is horizontally arranged and fixed on the chassis seat, the two supporting disks are arranged at two ends of the central shaft, the matching seat and the calibration disk are arranged on the central shaft between the two supporting disks at intervals, the centers of the two supporting disks and the calibration disk are superposed with the center of the central shaft, the distance between the two supporting disks and the distance between the two leg rods are matched, the radius of the calibration disk is equal to the designed radius of the excircle of the balancing weight to be tested, the distance between the calibration disk and the adjacent supporting disk is matched with the distance between the vertical through hole and the adjacent leg, the top of the matching seat is provided with a horizontal plane matched with the assembling surface of the balancing weight to be tested, the horizontal plane is provided with a threaded hole corresponding to the assembling hole of the balancing weight to be tested, the distance between the horizontal plane and the center of the central shaft is equal to the distance between the assembling surface of the balancing weight to the excircle center of the adjacent supporting disk, the distance between the matching seat and the adjacent supporting disk are matched with the distance between the calibration disk and the adjacent supporting disk,
when the device is used, the dial indicator is installed in the vertical through hole with the measuring rod of the dial indicator facing downwards, the supporting surfaces at the bottoms of the two leg rods are respectively supported by the cylindrical surfaces of the two supporting disks, and the balancing weight to be tested is installed on the assembling seat with the side surface thereof perpendicular to the central shaft and the outer circular surface thereof facing upwards.
Further, the supporting surface is an inverted V-shaped surface.
Based on the checking fixture, the invention provides a radius of a crankshaft counterweight block, which comprises the following steps:
1) Assembling: enabling the assembly surface of the balancing weight to be measured to face downwards and align with the horizontal plane on the assembly seat, screwing a bolt into the assembly hole of the balancing weight to be measured and inserting the bolt into the threaded hole of the horizontal plane in a rotating mode, enabling the balancing weight to be measured to be fixedly installed on the assembly seat, enabling the assembly surface of the balancing weight to be measured to be tightly attached to the horizontal plane at the moment, and enabling the side surface of the balancing weight to be measured to be perpendicular to the central shaft;
2) Calibrating the meter: moving the meter frame above a calibration gauge, so that the bottom supporting surfaces of the two leg rods are respectively supported by the cylindrical surfaces of the two supporting disks, the measuring rod of the dial indicator downwards passes through the vertical through hole, the measuring head abuts against the cylindrical surfaces of the calibration disks, the position of the dial indicator is adjusted, certain initial measuring pressure of the measuring rod is ensured, and the dial indicator is fixed, so that the zero-position scribed line of the dial plate is aligned with the pointer;
3) Measurement: improve the table frame and horizontal rotation 180, two frame leg pole exchange positions place again on supporting the disc, and the cylinder bearing holding surface of two supporting discs, percentage table measuring stick gauge head are in the balancing weight excircle that awaits measuring this moment, and the reading indicating value of inspection percentage table, this value is the deviation of the relative design radius of balancing weight actual radius that awaits measuring promptly, can be around supporting the cylinder back-and-forth movement table frame of disc to detect the radius of the different positions of balancing weight that awaits measuring.
Furthermore, in the step of calibrating the dial indicator, after the measuring rod of the dial indicator is pre-pressed for 0.3-1.0mm, the dial indicator is fixed, and then the zero position scale line of the dial indicator is aligned with the pointer.
The crankshaft balancing weight radius gauge and the detection method utilize the fact that the distance from the horizontal plane of the assembling seat to the center of the central shaft is equal to the distance from the assembling surface of the balancing weight to be detected to the center of the excircle of the balancing weight, when the balancing weight to be detected is installed on the assembling seat, the center of the excircle of the balancing weight to be detected is located at the center of the central shaft, and as the crossbeam for installing the dial indicator is parallel to the central shaft, when the dial indicator returned to zero by the design radius calibration table is abutted to the excircle of the balancing weight to be detected, the reading of the crossbeam is the deviation value between the actual radius of the balancing weight to be detected and the design radius.
The checking fixture is simple in structure and free of limitation of use environment, after the dial indicator is calibrated by using the calibration disc, the radius of the balancing weight to be detected can be detected by rotating horizontally for 180 degrees, and the operation steps are simple, rapid and reliable, so that the radius of the balancing weight can be detected on line, the checking waiting time is greatly reduced, the production efficiency is improved, and the checking fixture is suitable for popularization and use in mass industrial production, and the two legs for supporting the disc bearing meter frame are ensured in the calibration and measurement processes.
Drawings
FIG. 1 is a schematic structural diagram of a crankshaft counterweight radius gauge according to an embodiment;
FIG. 2 is a schematic structural diagram of a watch holder according to an embodiment;
FIG. 3 is a schematic view of an embodiment of a crankshaft counterweight radius gauge in use;
fig. 4 is a schematic structural diagram of a counterweight block to be measured.
In the figure, 1, a watch frame; 1-1, a leg rod; 1-2, supporting blocks; 1-3, a cross beam; 1-3-1, vertical through holes; 2. a dial indicator; 3. calibrating a gauge; 3-1. Central shaft; 3-2, supporting the disc; 3-3, assembling a base; 3-3-1. Horizontal plane; 3-3-2. A threaded hole; 3-4, calibrating the disc; 3-5, a base frame seat; 4. a balancing weight to be tested; 4-1, assembling surface; 4-2, assembling holes.
Detailed Description
The present invention will be described in detail with reference to examples.
Referring to fig. 1 to 4, a crankshaft counterweight radius gauge comprises a gauge stand 1, a dial indicator 2 and a gauge 3,
the meter frame 1 comprises a crossbeam 1-3 and two leg rods 1-1 which are horizontally arranged, one side of the crossbeam 1-3 is provided with a vertical through hole 1-3-1 for installing the dial indicator 2, the two leg rods 1-1 are vertically arranged and symmetrically arranged at two ends of the crossbeam 1-3, the top end of the leg rod 1-1 is connected with the crossbeam 1-3, the bottom of the leg rod 1-1 is provided with a supporting block 1-2, the bottom of the supporting block 1-2 is provided with an inverted V-shaped surface,
the gauge 3 comprises two supporting disks 3-2 with equal radius, an assembling seat 3-3 for mounting a balancing weight 4 to be tested, a checking disk 3-4, a central shaft 3-1 and a chassis seat 3-5, wherein the central shaft 3-1 is horizontally arranged and fixed on the chassis seat 3-5, the two supporting disks 3-2 are arranged at two ends of the central shaft 3-1, the assembling seat 3-3 and the checking disk 3-4 are arranged on the central shaft 3-1 between the two supporting disks 3-2 at intervals, the centers of the two supporting disks 3-2 and the checking disk 3-4 are superposed with the center of the central shaft 3-1, the distance between the two supporting disks 3-2 is matched with the distance between the two leg rods 1-1, the radius of the checking disk 3-4 is equal to the design radius of the excircle of the balancing weight 4 to be tested, the distance between the calibration disc 3-4 and the adjacent support disc 3-2 is matched with the distance between the vertical through hole 1-3-1 and the adjacent frame leg, the top of the assembling seat 3-3 is provided with a horizontal plane 3-3-1 matched with the assembling surface 4-1 of the balancing weight 4 to be tested, the horizontal plane 3-3-1 is provided with a threaded hole 3-3-2 corresponding to the assembling hole 4-2 of the balancing weight 4 to be tested, the distance between the horizontal plane 3-3-1 and the center of the central shaft 3-1 is equal to the distance between the assembling surface 4-1 of the balancing weight 4 to be tested and the outer circle center thereof, the distance between the assembling seat 3-3 and the adjacent support disc 3-2 is matched with the distance between the calibration disc 3-4 and the adjacent support disc 3-2,
when the device is used, the dial indicator 2 is installed in the vertical through hole 1-3-1 with the measuring rod facing downwards, the inverted V-shaped surfaces at the bottoms of the two leg rods 1-1 are respectively supported by the cylindrical surfaces of the two supporting disks 3-2, and the balancing weight 4 to be tested is installed on the assembling seat 3-3 with the side surface perpendicular to the central shaft 3-1 and the outer circular surface facing upwards.
When the detection tool is used for detecting the radius of the balancing weight, firstly, an assembly surface 4-1 of the balancing weight 4 to be detected is downwards abutted to a horizontal surface 3-3-1 of an assembly seat 3-3, a fixing bolt is inserted into an assembly hole 4-2 of the balancing weight 4 to be detected and screwed into a thread of the assembly seat 3-3, the balancing weight 4 to be detected is fixed on the assembly seat 3-3, at the moment, an outer circular surface (cylindrical surface) of the balancing weight 4 to be detected is upwards, and the side surface of the balancing weight is vertical to a central shaft 3-1; then, calibrating the meter, enabling two leg rods 1-1 of the meter frame 1 to face downwards, enabling cylindrical surfaces of two supporting disks 3-2 to respectively support inverted V-shaped surfaces at the bottoms of the two leg rods 1-1, enabling a measuring rod of a dial indicator 2 to downwards penetrate through vertical through holes 1-3-1, enabling a measuring head to abut against the cylindrical surfaces of the calibrating disks 3-4, adjusting the position of the dial indicator 2, fixing the dial indicator 2 after the measuring rod is pre-pressed for 0.5mm, and enabling zero-position scribed lines of a dial plate to be aligned with pointers; and then, measuring, namely lifting the meter frame 1, horizontally rotating the meter frame by 180 degrees, then putting down the meter frame, replacing the two leg rods 1-1 on the supporting disks 3-2 after the positions of the two leg rods are changed, supporting the inverted V-shaped surfaces on the cylindrical surfaces of the two supporting disks 3-2, abutting a measuring head of the measuring rod of the dial indicator 2 against the outer circle of the balancing weight block to be measured 4, reading an indicated value of the dial indicator 2, wherein the indicated value is the deviation of the actual radius of the balancing weight block to be measured relative to the designed radius, and moving the meter frame 1 back and forth around the cylindrical surfaces of the supporting disks 3-2 to detect the radii of different parts of the balancing weight block to be measured 4.
The radius detection tool of this embodiment simple structure, the cost of manufacture is low, the simple operation, numerical value is reliable, can realize the online short-term test bent axle balancing weight radius of production site, is favorable to improving balancing weight production efficiency.
Claims (4)
1. A checking tool for the radius of a crankshaft counterweight block is characterized by comprising a gauge stand, a dial indicator and a gauge,
the dial gauge comprises a cross beam and two leg rods, wherein the cross beam is horizontally arranged, one side of the cross beam is provided with a vertical through hole for mounting the dial gauge, the two leg rods are vertically arranged and symmetrically arranged at two ends of the cross beam, the top ends of the leg rods are connected with the cross beam, the bottom of each leg rod is provided with a supporting block, the bottom of each supporting block is provided with a concave supporting surface,
the calibration gauge comprises two supporting disks with equal radiuses, a matching seat for mounting the balancing weight to be tested, a calibration disk, a central shaft and a chassis seat, wherein the central shaft is horizontally arranged and fixed on the chassis seat, the two supporting disks are arranged at two ends of the central shaft, the matching seat and the calibration disk are arranged on the central shaft between the two supporting disks at intervals, the centers of the two supporting disks and the calibration disk are superposed with the center of the central shaft, the distance between the two supporting disks and the distance between the two leg rods are matched, the radius of the calibration disk is equal to the designed radius of the excircle of the balancing weight to be tested, the distance between the calibration disk and the adjacent supporting disk is matched with the distance between the vertical through hole and the adjacent leg, the top of the matching seat is provided with a horizontal plane matched with the assembling surface of the balancing weight to be tested, the horizontal plane is provided with a threaded hole corresponding to the assembling hole of the balancing weight to be tested, the distance between the horizontal plane and the center of the central shaft is equal to the distance between the assembling surface of the balancing weight to the excircle center of the adjacent supporting disk, the distance between the matching seat and the adjacent supporting disk are matched with the distance between the calibration disk and the adjacent supporting disk,
when the device is used, the dial indicator is installed in the vertical through hole with the measuring rod of the dial indicator facing downwards, the supporting surfaces at the bottoms of the two leg rods are respectively supported by the cylindrical surfaces of the two supporting disks, and the balancing weight to be measured is installed on the assembling seat with the side surface perpendicular to the central shaft and the outer circular surface facing upwards.
2. The crankshaft counterweight radius gauge of claim 1, wherein said support surface is an inverted V-shaped surface.
3. A crankshaft counterweight radius detection method is characterized in that the crankshaft counterweight radius detection tool based on the claim 1 or 2 comprises the following steps:
1) Assembling: enabling the assembly surface of the balancing weight to be measured to face downwards and align with the horizontal plane on the assembly seat, screwing a bolt into the assembly hole of the balancing weight to be measured and inserting the bolt into the threaded hole of the horizontal plane in a rotating mode, enabling the balancing weight to be measured to be fixedly installed on the assembly seat, enabling the assembly surface of the balancing weight to be measured to be tightly attached to the horizontal plane at the moment, and enabling the side surface of the balancing weight to be measured to be perpendicular to the central shaft;
2) Calibrating the meter: moving the meter frame above a calibration gauge, so that the bottom supporting surfaces of the two leg rods are respectively supported by the cylindrical surfaces of the two supporting disks, the measuring rod of the dial indicator downwards passes through the vertical through hole, the measuring head abuts against the cylindrical surfaces of the calibration disks, the position of the dial indicator is adjusted, certain initial measuring pressure of the measuring rod is ensured, and the dial indicator is fixed, so that the zero-position scribed line of the dial plate is aligned with the pointer;
3) Measurement: improve the table frame and horizontal rotation 180, two frame leg pole exchange positions place again on supporting the disc, and the cylinder bearing holding surface of two supporting discs, percentage table measuring stick gauge head are in the balancing weight excircle that awaits measuring this moment, and the reading indicating value of inspection percentage table, this value is the deviation of the relative design radius of balancing weight actual radius that awaits measuring promptly, can be around supporting the cylinder back-and-forth movement table frame of disc to detect the radius of the different positions of balancing weight that awaits measuring.
4. The method for detecting the radius of the crankshaft counterweight according to claim 3, wherein in the step of calibrating the dial gauge, after the measuring rod of the dial gauge is pre-pressed for 0.3-1.0mm, the dial gauge is fixed, and then the zero position scale line of the dial gauge is aligned with the pointer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211028824.0A CN115164679B (en) | 2022-08-26 | 2022-08-26 | Crankshaft balancing weight radius gauge and detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211028824.0A CN115164679B (en) | 2022-08-26 | 2022-08-26 | Crankshaft balancing weight radius gauge and detection method |
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| CN115164679A true CN115164679A (en) | 2022-10-11 |
| CN115164679B CN115164679B (en) | 2023-09-29 |
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| CN212363047U (en) * | 2020-06-23 | 2021-01-15 | 桂林福达阿尔芬大型曲轴有限公司 | Device for measuring eccentricity and eccentric circle radius of crankshaft |
| CN217122492U (en) * | 2022-02-15 | 2022-08-05 | 桂林福达阿尔芬大型曲轴有限公司 | Tool clamp for machining excircle and side plane of crankshaft balancing weight |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102011120751A1 (en) * | 2011-12-08 | 2013-06-13 | Robert Bosch Gmbh | Measuring device for checking central position of longitudinal groove with respect to diameter of workpiece, has groove engagement element that is fixed at base body, where key button is adjusted in direction of outer peripheral surface |
| JP2015024424A (en) * | 2013-07-26 | 2015-02-05 | 一夫 野月 | Centering adjustment amount acquisition fixture and centering adjustment amount acquisition method |
| CN203928936U (en) * | 2013-12-20 | 2014-11-05 | 内江富晟机械有限公司 | A kind of crankshaft counter balance cylindrical jitter detection apparatus |
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| CN115164679B (en) | 2023-09-29 |
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