Parallelism detection of eccentric profile part

Abstract

This utility model provides a method for parallelism testing of eccentric contour parts, comprising: a bakelite handwheel passing through the center of a base; a platform on the top of the base; pin holders on the left and right sides of the top of the platform near the bakelite handwheel; a center pin passing through one side of the pin holder; a dial indicator column connected by bolts to the center of the top of the base away from the bakelite handwheel; a dial indicator on the side of the dial indicator column near the pin holder; a detection mandrel fitted on the left and right sides of the outside of the center pin of the pin holder; the eccentric contour part being held on the detection mandrel; the detection mandrel being fitted on the center pin; the bottom detection head of the dial indicator being pressed against the outer contour of the part to be tested; the pointer on the dial indicator being adjusted to 0; rotating the bakelite handwheel to drive the rack and pinion transmission mechanism to move the platform longitudinally, causing the bottom detection head of the dial indicator to move to the other side of the part; reading the value on the dial indicator; and comparing the value on the dial indicator with the tolerance value to determine whether the parallelism of the eccentric contour part meets the requirements.

Description

Technical Field

[0001] This utility model relates to the field of testing, and in particular to the field of eccentricity testing technology, specifically to a method for testing the parallelism of eccentric contour parts. Background Technology

[0002] The existing parallelism detection methods for eccentric contour parts, such as eccentric sleeves, mostly use coordinate measuring machines (CMMs). First, the outer end face (at least 3 points) is measured and set as the reference plane A. Then, the outer cylindrical surface is measured (at least 8 points are taken evenly) to construct the axis as the reference B (constraining the rotation of the X / Y axes). This forms the outer contour model data of the part. Then, the measurement is performed in segments along the inner hole axis (at least 2 cross sections, ≥8 points in each layer). The measurement points are fitted into a cylinder, and its axis C is extracted. The maximum distance deviation of axis C relative to axis B is automatically calculated by the CMM software. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a parallelism detection method for eccentric contour parts, so as to solve the difficulties of the prior art.

[0004] To achieve the above and other related objectives, this utility model provides a method for detecting the parallelism of eccentric contour parts, including:

[0005] A base 1, a bakelite handwheel 11 is inserted through the center of the base 1, a table 2 is provided on the top of the base 1, and a pin holder 3 is provided on the left and right sides of the top of the table 2 near the bakelite handwheel 11, and a pin 31 is inserted through one side of the pin holder 3;

[0006] The dial indicator column 4 is bolted to the center of the top of the base 1 on the side away from the bakelite handwheel 11. A dial indicator 41 is provided on the side of the dial indicator column 4 near the pin holder 3.

[0007] The detection spindle 5 is fitted on the left and right sides of the tip 31 of the ejector pin holder 3.

[0008] According to the preferred embodiment, the outer sides of the left and right sides of the detection mandrel 5 are provided with a chamfer of 0.5 x 45°, and the center of the left and right sides of the detection mandrel 5 is provided with a mounting positioning hole 3232, which is sleeved on the outer side of the tip 31.

[0009] According to the preferred embodiment, the detection mandrel 5 is provided with a taper.

[0010] According to the preferred embodiment, the taper of the detection mandrel 5 is 1:6000.

[0011] According to the preferred embodiment, the central axis of the detection spindle 5 coincides with the extension line of the central axis of the center point 31 of the pin holder 3 on the left and right sides of the top of the table 2.

[0012] According to the preferred embodiment, a rack and pinion transmission mechanism is provided between the tabletop 2 and the base 1, and the bakelite handwheel 11 is inserted through one side of the base 1 and meshes with the rack and pinion transmission mechanism.

[0013] According to the preferred embodiment, the bakelite handwheel 11 rotates to drive the rack and pinion transmission mechanism to move the table 2 longitudinally.

[0014] This utility model employs a base, a platform, a pin holder, a dial indicator column, a dial indicator, and a testing mandrel. The eccentric contour part is inserted from the side of the testing mandrel with the smaller outer diameter and moved along the outer wall of the mandrel to the other side until the eccentric contour part is secured on the mandrel. This ensures that the central axis of the eccentric contour part coincides with the central axis of the testing mandrel. The spacing between the pin holders is adjusted, and then the testing mandrel with the part to be tested is mounted on the top pin. The bottom testing head of the dial indicator is placed against one side of the outer contour of the part to be tested. The pointer on the dial indicator is set to 0. The bakelite handwheel is rotated to drive the rack and pinion transmission mechanism, causing the platform to move longitudinally, moving the bottom testing head of the dial indicator to the other side of the part. The value on the dial indicator is read, and the value is compared with the tolerance value to determine whether the parallelism of the eccentric contour part meets the requirements.

[0015] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the present invention. Attached Figure Description

[0016] Figure 1 The diagram shown is a structural schematic of this utility model.

[0017] Figure 2 The image shown is an enlarged schematic diagram of the top of the device in this utility model.

[0018] Label Explanation

[0019] 1. Base; 11. Bakelite handwheel;

[0020] 2. Countertop;

[0021] 3. Ejector pin holder; 31. Center pin; 32. Mounting positioning hole;

[0022] 4. Meter stand column; 41. Dial indicator;

[0023] 5. Inspect the mandrel; Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components shown in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0026] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0027] This utility model proposes a method for parallelism detection of eccentric contour parts, which can be used in the detection process. This utility model does not limit the type of eccentric contour parts, but the structure of the base 1, table 2, pin holder 3, dial indicator column 4, dial indicator 41 and detection mandrel 5 is particularly suitable for parallelism detection of eccentric contour parts.

[0028] In general, the parallelism detection of eccentric contour parts proposed in this utility model mainly includes: a base, a platform 2, a pin holder 3, a dial indicator stand 4, a dial indicator 41, and a detection mandrel 5. (See also...) Figure 1 It shows the arrangement of the base 1, the platform 2, the pin holder 3, the gauge holder column 4, the dial indicator 41, and the detection spindle 5.

[0029] In the parallelism testing process of the eccentric contour parts proposed in this utility model, a testing mandrel 5 corresponding to the eccentric hole diameter of the eccentric contour parts can be selected. The eccentric contour parts are then fitted onto the testing mandrel 5. It should be noted that the eccentric contour parts are fitted onto the testing mandrel 5 from the side with the smaller outer diameter and moved along the outer wall of the testing mandrel 5 to the other side until the eccentric contour parts are stuck on the testing mandrel 5. In this way, the central axis of the eccentric contour parts coincides with the central axis of the testing mandrel 5. The distance between the ejector pins 3 is adjusted by moving them. Then, the testing mandrel 5 with the parts to be tested is fitted onto the center 31. The bottom testing head of the dial indicator 41 is pressed against the outer contour of one side of the parts to be tested. The pointer on the dial indicator 41 is adjusted to 0. The bakelite handwheel 11 is rotated to drive the rack and pinion transmission mechanism to move the table 2 longitudinally, so that the bottom testing head of the dial indicator 41 moves to the other side of the parts. The value on the dial indicator 41 is read. The value on the dial indicator 41 is compared with the tolerance value to determine whether the parallelism of the eccentric contour parts meets the requirements.

[0030] A bakelite handwheel 11 is inserted through the center of the base 1. A table 2 is provided on the top of the base 1. A rack and pinion transmission mechanism is provided between the table 2 and the base 1. The bakelite handwheel 11 is inserted into the base 1 and meshes with the rack and pinion transmission mechanism. The table 2 moves longitudinally between itself and the base 1 through the rack and pinion transmission mechanism. A pin holder 3 is provided on the left and right sides of the top of the table 2 near the bakelite handwheel 11. A pin 31 is inserted through one side of the pin holder 3. A dial indicator column 4 is bolted to the center of the top of the base 1 on the side away from the bakelite handwheel 11. A dial indicator 41 is provided on the side of the dial indicator column 4 near the pin holder 3.

[0031] The aforementioned test mandrel 5 is mounted on the outer side of the center point 31 of the ejector pin holder 3. The outer sides of the test mandrel 5 are chamfered at 0.5 x 45° to guide the part and prevent sharp corners from scratching it. Mounting and positioning holes 3232 are provided in the center of the left and right sides of the test mandrel 5, and are fitted onto the outer side of the center point. It should also be noted that the test mandrel 5 has a taper of 1:6000. Since the inner hole of the part to be tested has a certain tolerance, if a non-tapered test mandrel 5 is selected, a gap will occur when assembling the outer contour of the test mandrel 5 and the inner hole of the part to be tested. This will prevent the centerline of the part to be tested from coinciding with the centerline of the test mandrel 5, making it impossible to use the centerline of the test mandrel 5 as a reference to check the parallelism of the outer contour centerline of the part to be tested. Furthermore, the taper also allows for checking whether the inner hole of the part to be tested meets the tolerance range. If there is no point on the test mandrel 5 that can hold the part to be tested, then the subsequent parallelism testing step is unnecessary, as the part to be tested is out of tolerance.

[0032] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A method of detecting parallelism of an eccentric profiled part, characterized in that, include: A base (1) is provided with a bakelite handwheel (11) in the center of the base (1). A table (2) is provided on the top of the base (1). A pin holder (3) is provided on the left and right sides of the top of the table (2) near the bakelite handwheel (11). A pin (31) is provided on one side of the pin holder (3). The dial indicator column (4) is bolted to the center of the top of the base (1) on the side away from the bakelite handwheel (11). A dial indicator (41) is provided on the side of the dial indicator column (4) near the pin holder (3). The detection spindle (5) is fitted on the left and right sides of the tip (31) of the ejector pin holder (3).

2. The parallelism detection method for eccentric contour parts according to claim 1, characterized in that, The detection mandrel (5) has a 0.5X45° chamfer on the outer sides of its left and right sides. The detection mandrel (5) has a mounting positioning hole (32) in the center of its left and right sides. The mounting positioning hole (32) is fitted on the outer side of the tip (31).

3. The parallelism detection of eccentric profile parts according to claim 2, characterized in that, The detection mandrel (5) is tapered.

4. The parallelism detection of eccentric profile parts according to claim 3, characterized in that, The taper of the detection mandrel (5) is 1:6000.

5. The parallelism detection of eccentric profile parts according to claim 4, characterized in that, The central axis of the detection mandrel (5) coincides with the extension line of the central axis of the center point (31) of the center point frame (3) on the left and right sides of the top of the table (2).

6. The parallelism detection of eccentric profile parts according to claim 5, characterized in that, A rack and pinion transmission mechanism is provided between the tabletop (2) and the base (1), and the bakelite handwheel (11) is inserted into one side of the base (1) and meshes with the rack and pinion transmission mechanism.

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