Eccentric ring quick detection tool

Abstract

The utility model relates to detection technical field. A kind of eccentric ring rapid testing fixture, including bottom plate, workpiece limiting component, table support seat and dial gauge;Workpiece limiting component includes first circumferential limiting block and second circumferential limiting block, and the positioning surface for resisting the special-shaped side wall of eccentric ring is set on first circumferential limiting block and second circumferential limiting block;First circumferential limiting block is set left and right with table support seat;Second circumferential limiting block is located in the front or rear of the area between first circumferential limiting block and table support seat;Mounting hole for installing dial gauge is opened in table support seat, and dial gauge is horizontally arranged, and the fixed rod of dial gauge passes through mounting hole, and locking screw for resisting fixed rod is threadedly connected on table support seat.The utility model realizes the positioning of two different positions of eccentric ring by first circumferential limiting block and second circumferential limiting block, and guarantees the positioning effect to workpiece.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, specifically to inspection tools. Background Technology

[0002] Powder metallurgy, as a mature material preparation technology, is widely used in many key industrial sectors such as automobiles, motorcycles, home appliances, metallurgy, and machinery due to its advantages such as being green, efficient, low-carbon, and sustainable. The eccentric ring produced by this process is a ring-shaped component with a specific geometry (usually a non-concentric circle structure).

[0003] For the inspection of critical assembly dimensions of this type of eccentric ring, coordinate measuring machines (CMMs) are currently widely used. This technical solution uses a high-precision probe, under program control, to contact multiple points on the workpiece surface, collect coordinate data, and then uses specialized software for calculation and analysis to ultimately obtain the required dimensional and geometric tolerance results. The main technical advantage of this method is that it can theoretically achieve extremely high measurement accuracy and is suitable for the inspection of workpieces with complex shapes.

[0004] However, in practical applications, especially in the quality control stage of mass production, coordinate measuring machines (CMMs) have significant drawbacks and limitations in dimensional measurement:

[0005] Low inspection efficiency: Coordinate measuring machine (CMM) measurement requires point-by-point sampling, path planning, positioning, contact measurement, and subsequent data processing. The entire process is time-consuming and cannot meet the efficiency requirements of rapid, large-scale full inspection or spot inspection of eccentric rings on the production line.

[0006] Complex operation and high cost: The coordinate measuring machine itself is expensive, requires high professional skills from operators (proficient in programming and operation), and requires strict measurement environment maintenance such as constant temperature and humidity, resulting in high overall operating costs.

[0007] Measurement of specific geometric features is inconvenient: For workpieces with asymmetrical or eccentric structures, such as eccentric rings, precise planning of the measurement path and setting of the reference are required, which is relatively cumbersome and prone to measurement errors due to clamping or reference setting problems.

[0008] Therefore, existing coordinate measuring machine (CMM) based technical solutions are significantly insufficient in meeting the demand for rapid, convenient, and low-cost inspection during the mass production of eccentric rings, and there is an urgent need to develop more efficient dedicated inspection methods. Utility Model Content

[0009] In view of the problems existing in the prior art, this utility model provides an eccentric ring quick inspection tool to solve at least one of the above technical problems.

[0010] To achieve the above objectives, this utility model provides a quick inspection tool for an eccentric ring, characterized in that it includes a base plate, a workpiece limiting assembly, a dial indicator support base, and a dial indicator.

[0011] The base plate is detachably connected to the table frame support and the workpiece limiting assembly.

[0012] The workpiece limiting assembly includes a first circumferential limiting block and a second circumferential limiting block, and both the first circumferential limiting block and the second circumferential limiting block are provided with positioning surfaces for abutting against the irregular sidewall of the eccentric ring.

[0013] The positioning surface on the first circumferential limiting block is a concave arc-shaped surface;

[0014] The first circumferential limiting block is positioned to the left and right of the table frame support base;

[0015] The second circumferential limiting block is located in front of or behind the area between the first circumferential limiting block and the table frame support.

[0016] The dial indicator support has a mounting hole for mounting a dial indicator. The opening of the mounting hole faces the arc-shaped surface. The dial indicator is horizontally positioned. The fixing rod of the dial indicator passes through the mounting hole, and the dial indicator support is threaded with a locking screw for abutting the fixing rod.

[0017] This utility model achieves positioning of the eccentric ring at two different positions through the first circumferential limiting block and the second circumferential limiting block, thus ensuring the positioning effect of the workpiece. At the same time, the outer diameter of a special area of ​​the product is measured by a dial indicator.

[0018] Further preferred options include standard parts that match the outer contour of the product under test;

[0019] The standard part is provided with an outwardly convex arc-shaped surface and a cut surface;

[0020] The standard part is provided with an extension portion that is opposite to the arc-shaped surface, and the surface of the extension portion away from the arc-shaped surface is used as the detection surface;

[0021] The probe of the dial indicator is used to contact the detection surface.

[0022] This facilitates the calibration and zeroing of the dial indicator.

[0023] More preferably, the arc-shaped surface matches the arc-shaped surface;

[0024] The positioning surface on the second circumferential limiting block is a vertically set plane, and the cut surface matches the plane.

[0025] This facilitates the fixing of the product's position.

[0026] More preferably, the first circumferential limiting block includes a first positioning part, and the right side of the first positioning part is provided with the arc-shaped surface;

[0027] The bottom of the first positioning part is provided with a first extension seat that extends forward and backward, and the first extension seat is provided with mounting holes.

[0028] This facilitates the installation of the first-cycle limit block.

[0029] More preferably, the second circumferential limiting block includes a second positioning part, and the plane is provided on one side of the second positioning part;

[0030] The bottom of the second positioning part away from the plane is provided with a second extension seat, and the second extension seat has at least two mounting holes arranged side by side.

[0031] More preferably, the height of the first circumferential limiting block is higher than the height of the second circumferential limiting block.

[0032] More preferably, the watch stand support is inverted T-shaped.

[0033] More preferably, the watch holder support has a threaded hole for threaded connection of the locking screw.

[0034] Radial locking is achieved using an M6 set screw (locking torque of 3 N·m).

[0035] More preferably, the base plate is a rectangular steel plate.

[0036] More preferably, the base plate is a steel plate made of 45# steel that has been quenched, and the flatness of the upper surface is ≤0.02mm.

[0037] Compared with the prior art, the beneficial effects of this utility model are:

[0038] (1) Detection efficiency has increased dramatically;

[0039] Compared to traditional coordinate measuring machines (which take about 10-30 minutes to inspect a single piece), this inspection fixture achieves a single piece inspection time of ≤30 seconds through programming-free, one-click operation (the dial indicator value can be read after placing the workpiece), improving efficiency by more than 20 times (typical value), and meeting the high-frequency full inspection / sampling inspection needs of the production line.

[0040] (2) The measurement accuracy is reliable;

[0041] After calibration with standard blocks, the dial indicator has a resolution of 0.001mm, can stably detect dimensions, and has a tolerance control capability of ±0.05mm (adjustable according to workpiece requirements). The deviation from the coordinate measuring machine measurement results is ≤±0.02mm (experimental statistical value), which fully meets the process quality control standards.

[0042] (3) Breakthrough in ease of operation;

[0043] No professional programming skills or complex equipment operation training are required. Ordinary quality inspectors can operate it independently after ≤1 hour of training, which significantly reduces the risk of human error. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of a specific embodiment 1 of the present utility model.

[0045] In the diagram: 1 is the base plate, 2 is the first circumferential limit block, 3 is the dial indicator support, 4 is the dial indicator, 5 is the standard part, and 6 is the second circumferential limit block. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings.

[0047] See Figure 1 Specific Embodiment 1: An eccentric ring quick inspection tool includes a base plate 1, a workpiece limiting assembly, a dial indicator support 3, and a dial indicator 4; the base plate 1 is detachably connected to the dial indicator support 3 and the workpiece limiting assembly; the workpiece limiting assembly includes a first circumferential limiting block 2 and a second circumferential limiting block 6, both of which are provided with positioning surfaces for abutting the irregular sidewalls of the eccentric ring; the positioning surface on the first circumferential limiting block 2 is a concave arc-shaped surface; the first circumferential limiting block 2 and the dial indicator support 3 are arranged left and right; the second circumferential limiting block 6 is located in front of or behind the area between the first circumferential limiting block 2 and the dial indicator support 3; the dial indicator support 3 has a mounting hole for mounting the dial indicator 4, the opening of the mounting hole is directly opposite the arc-shaped surface, the dial indicator 4 is horizontally set, the fixing rod of the dial indicator 4 passes through the mounting hole, and the dial indicator support 3 is threadedly connected with a locking screw for abutting the fixing rod. This utility model achieves positioning of the eccentric ring at two different positions through the first circumferential limiting block 2 and the second circumferential limiting block 6, thus ensuring the positioning effect of the workpiece. At the same time, the outer diameter of a special area of ​​the product is measured by dial indicator 4.

[0048] It also includes a standard part 5 that matches the outer contour of the product to be tested; the standard part 5 has a convex arc-shaped surface and a tangent surface; the standard part 5 has an extension that is positioned opposite the arc-shaped surface, with the surface of the extension away from the arc-shaped surface serving as the detection surface; the probe of the dial indicator 4 is used to contact the detection surface. This facilitates the calibration and zeroing of the dial indicator 4.

[0049] The arc-shaped surfaces match each other; the positioning surface on the second circumferential limiting block 6 is a vertically set plane, and the tangent surface matches the plane. This facilitates the positioning and fixing of the product.

[0050] The first circumferential limiting block 2 includes a first positioning part, the right side of which has an arc-shaped surface; the bottom of the first positioning part is provided with a first extension seat that extends forward and backward, and the first extension seat has a mounting hole. This facilitates the installation of the first circumferential limiting block 2.

[0051] The second circumferential limiting block 6 includes a second positioning part, one side of which is provided with a plane; a second extension seat is provided at the bottom of the side of the second positioning part away from the plane, and at least two mounting holes are provided on the second extension seat.

[0052] The height of the first circumferential limiting block 2 is higher than the height of the second circumferential limiting block 6.

[0053] The dial indicator support 3 is inverted T-shaped. The support 3 has threaded holes for threaded connection and locking screws. These threaded holes align with the mounting holes of the dial indicator. It is radially locked using an M6 set screw (locking torque 3 N·m).

[0054] Base plate 1 is a rectangular steel plate. Base plate 1 is a quenched steel plate made of 45# steel, and the flatness of the upper surface is ≤0.02mm.

[0055] The steps for calibrating this device are as follows:

[0056] (1) Place the standard block 5 in the positioning area of ​​the base plate 1, and position the first circumferential limiting block 2 and the second circumferential limiting block 6 relative to the corresponding area on the standard block 5.

[0057] (2) The dial indicator 4 probe contacts the test surface of the standard block. Make a slight horizontal adjustment to the position of the dial indicator. After adjusting the dial to zero, tighten the locking screw.

[0058] The steps for using this device for testing are as follows:

[0059] (1) Remove standard block 5 and place the eccentric ring to be tested in the same orientation as the standard block. At this time, pull the protruding rod that is located on the side of the dial away from the probe and is linked to the probe. After the eccentric ring to be tested is in place, release the protruding rod.

[0060] (2) Directly read the offset value ΔL of the dial indicator 4 pointer, then the actual size = nominal value + ΔL, where the nominal value is the outer diameter value at the inspection surface of the standard part.

[0061] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A rapid inspection tool for an eccentric ring, characterized in that, Includes base plate, workpiece limiting assembly, dial indicator support base and dial indicator; The base plate is detachably connected to the table frame support and the workpiece limiting assembly. The workpiece limiting assembly includes a first circumferential limiting block and a second circumferential limiting block, and both the first circumferential limiting block and the second circumferential limiting block are provided with positioning surfaces for abutting against the irregular sidewall of the eccentric ring. The positioning surface on the first circumferential limiting block is a concave arc-shaped surface; The first circumferential limiting block is positioned to the left and right of the table frame support base; The second circumferential limiting block is located in front of or behind the area between the first circumferential limiting block and the table frame support. The dial indicator support has a mounting hole for mounting a dial indicator. The opening of the mounting hole faces the arc-shaped surface. The dial indicator is horizontally positioned. The fixing rod of the dial indicator passes through the mounting hole, and the dial indicator support is threaded with a locking screw for abutting the fixing rod.

2. The eccentric ring rapid inspection tool according to claim 1, characterized in that: It also includes standard parts that match the outer contour of the product under test; The standard part is provided with an outwardly convex arc-shaped surface and a cut surface; The standard part is provided with an extension portion that is opposite to the arc-shaped surface, and the surface of the extension portion away from the arc-shaped surface is used as the detection surface; The probe of the dial indicator is used to contact the detection surface.

3. The eccentric ring rapid inspection tool according to claim 2, characterized in that: The arc-shaped surface matches the arc-shaped surface; The positioning surface on the second circumferential limiting block is a vertically set plane, and the cut surface matches the plane.

4. The eccentric ring rapid inspection tool according to claim 3, characterized in that: The first circumferential limiting block includes a first positioning part, and the arc-shaped surface is provided on the right side of the first positioning part; The bottom of the first positioning part is provided with a first extension seat that extends forward and backward, and the first extension seat is provided with mounting holes.

5. The eccentric ring rapid inspection tool according to claim 3, characterized in that: The second circumferential limiting block includes a second positioning part, and the plane is provided on one side of the second positioning part; The bottom of the second positioning part away from the plane is provided with a second extension seat, and the second extension seat has at least two mounting holes arranged side by side.

6. The eccentric ring rapid inspection tool according to claim 1, characterized in that: The height of the first circumferential limiting block is higher than the height of the second circumferential limiting block.

7. The eccentric ring rapid inspection tool according to claim 1, characterized in that: The support base for the watch stand is inverted T-shaped.

8. The eccentric ring rapid inspection tool according to claim 1, characterized in that: The support base of the watch stand has a threaded hole for threaded connection of the locking screw.

9. The eccentric ring quick inspection tool according to claim 1, characterized in that: The base plate is a rectangular steel plate.

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