CN220288599U - Straightness measuring instrument - Google Patents

Abstract

The application relates to a straightness measuring instrument, which comprises a workbench, a bracket and a driving assembly, wherein the workbench is used for placing a workpiece to be detected; the support is connected with the workbench, an X-displacement sensor is arranged on the support, sliding parts distributed along the X direction are also arranged on the support, sliding matching parts are connected onto the sliding parts in a sliding mode, and a Y-displacement sensor is arranged on the sliding matching parts; the driving assembly is connected with the sliding fit part and is used for driving the sliding fit part to move back and forth on the sliding part, the data obtained by the X-displacement sensor and the data obtained by the Y-displacement sensor are transmitted to the computer, the straightness of a workpiece can be obtained through fitting the data by the computer, and the whole structure is simpler and has low requirements on the environment, so that the device can be used on the production site.

Description

Straightness measuring instrument

Technical Field

The application relates to the field of straightness measurement, in particular to a straightness measuring instrument.

Background

Straightness is a state in which a straight line element on a part maintains an ideal straight line, that is, a so-called flatness degree, and a straightness tolerance is a maximum allowable variation amount of an actual line from the ideal straight line.

Straightness is divided into surface straightness and axis straightness according to the calling mode, wherein the surface straightness is a standard form and is a two-dimensional tolerance, and the surface straightness is used for ensuring that parts are uniform on the whole surface or characteristics. Surface straightness can be applied to planar features (e.g. the surface of a block) as well as to the surface of a cylinder in the axial direction. It is defined as the surface tolerance within a specified line on the surface.

In the related art, there are two common methods for straightness measurement at the factory:

1. the knife edge is placed on the measured surface of the workpiece, the light transmission gap is seen to roughly estimate the straightness, the measurement accuracy depends on the experience of an operator, and no measurement data support exists.

2. The surface straightness is measured by using a profiler, the accuracy is guaranteed, but the purchasing cost is very high, and the requirements on the use environment are very high, so that the requirements on vibration prevention, dust free and constant temperature and humidity are met. Cannot be realized on the production site.

In view of this, the present application proposes a straightness measuring instrument.

Disclosure of Invention

The embodiment of the application provides a straightness measuring instrument, which aims to solve the technical problems that the use of a knife edge in the related technology depends on the experience of an operator, no measurement data support exists, the use of a profilometer for measurement has high requirements on the use environment, and the measurement cannot be realized on a production site.

Provided is a straightness measuring instrument including:

a workbench for placing a workpiece to be detected;

the support is connected with the workbench, an X-displacement sensor is arranged on the support, sliding parts distributed along the X direction are also arranged on the support, sliding matching parts are connected onto the sliding parts in a sliding mode, and a Y-displacement sensor is arranged on the sliding matching parts;

and the driving assembly is connected with the sliding fit part and used for driving the sliding fit part to reciprocate on the sliding part.

In some embodiments, the driving assembly includes a servo motor, two synchronizing wheels and a synchronous belt sleeved on the two synchronizing wheels, the servo motor is fixed on the bracket, one synchronizing wheel is in driving connection with the servo motor, the other synchronizing wheel is rotatably arranged on the bracket, and the sliding fit part is fixed on the synchronous belt.

In some embodiments, the sliding portion adopts an air-floating guide rail, the sliding fit portion adopts an air-floating sliding block, and the driving assembly is connected with the air-floating sliding block.

In some embodiments, the support is disposed below the table, and the table is provided with an opening through which the Y-displacement sensor passes.

In some embodiments, the workbench is provided with a positioning block.

The beneficial effects that technical scheme that this application provided brought include:

the embodiment of the application provides a straightness measuring instrument, drive sliding fit portion along sliding portion through drive assembly and remove, the route that its moved is felt by X displacement sensor, and in this process Y displacement sensor through contacting the work piece, obtain the high low fluctuation data on work piece surface of contact and work piece contact measurement, pass the data that X displacement sensor obtained with Y displacement sensor obtained on the computer, through computer fitting data, can obtain the straightness of work piece, because overall structure is comparatively simple, the requirement is not high to the environment, consequently can use at the production scene, on the other hand, other measuring equipment compares, use cost is lower.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram provided in an embodiment of the present application;

FIG. 3 is a cross-sectional view provided by an embodiment of the present application;

fig. 4 is a graph of fitting data provided in an embodiment of the present application.

In the figure: 1. a work table; 2. a bracket; 3. an X-axis displacement sensor; 4. a sliding part; 5. a sliding fit portion; 6. a Y-displacement sensor; 7. a drive assembly; 71. a servo motor; 72. a synchronizing wheel; 73. a synchronous belt; 8. and (5) positioning blocks.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

The embodiment of the application provides a straightness measuring instrument, which can solve the technical problems that the use of a knife edge in the related technology depends on the experience of an operator, no measurement data support exists, the use of a profilometer for measurement has high requirements on the use environment, and the measurement cannot be realized on a production site.

In order to solve the technical problems, the application provides a straightness measuring instrument, which comprises a workbench 1, a bracket 2 and a driving assembly 7, wherein the workbench 1 is used for placing a workpiece to be detected; the support 2 is connected with the workbench 1, an X-displacement sensor 3 is arranged on the support 2, sliding parts 4 distributed along the X direction are also arranged on the support 2, sliding matching parts 5 are connected onto the sliding parts 4 in a sliding manner, and Y-displacement sensors 6 are arranged on the sliding matching parts 5; the driving assembly 7 is connected with the sliding fit part 5 and is used for driving the sliding fit part 5 to reciprocate on the sliding part 4.

The X-displacement sensor 3 is used for measuring displacement in the X direction, the Y-displacement sensor 6 is used for measuring a numerical value in the Y direction, data obtained by the X-displacement sensor 3 and data obtained by the Y-displacement sensor 6 are transmitted to a computer, the computer fits the data to obtain straightness of a workpiece, and the X-displacement sensor 3 and the Y-displacement sensor 6 are commercially available products, so that specific explanation is not made.

In this application, the X-displacement sensor 3 measures the sliding displacement of the sliding fit portion 5 on the sliding portion 4, specifically, the sliding fit portion 5 is driven to displace on the sliding portion 4 by the driving component 7, and the sliding fit portion 5 can be made to run more stably by the driving component 7.

Because overall structure is comparatively simple, has low to the environmental requirement, consequently can use at the production scene, on the other hand, other measuring equipment compares, and use cost is lower.

Further, the driving assembly 7 includes a servo motor 71, two synchronizing wheels 72, and a synchronous belt 73 sleeved on the two synchronizing wheels 72, the servo motor 71 is fixed on the bracket 2, one synchronizing wheel 72 is in driving connection with the servo motor 71, the other synchronizing wheel 72 is rotatably disposed on the bracket 2, and the sliding fit portion 5 is fixed on the synchronous belt 73.

The servo motor 71 is used for selling products in the market, the servo motor 71 can drive the synchronous wheel 72 to rotate, and then drive the synchronous belt 73 to rotate, and the sliding matching part 5 is fixed on the synchronous belt 73.

In other embodiments, the sliding fit portion 5 may be driven to move on the sliding portion 4 by a screw or the like.

Specifically, the sliding part 4 adopts an air-floating guide rail, the sliding matching part 5 adopts an air-floating sliding block, and the driving assembly 7 is connected with the air-floating sliding block.

The air-float guide rail is a bearing system for supporting working load by utilizing gas static pressure, and its working principle is that the working load is suspended on the air film by forming air film on the surface of guide rail, so that it can reduce contact area and friction force, and can raise accuracy and speed.

The air bearing rail and air bearing slider are also commercially available products and will not be explained here.

Specifically, the support 2 is disposed below the workbench 1, and an opening for the Y-displacement sensor 6 to pass through is formed in the workbench 1.

Since the Y-displacement sensor 6 has a contact point which is required to be in contact with the workpiece, when the holder 2 is disposed below the table 1, it is necessary to open a hole in the table 1, facilitating contact of the Y-displacement sensor 6 with the workpiece.

In one embodiment, the workbench 1 is provided with a positioning block 8, and the positioning block 8 is provided with a V-shaped groove, so that a cylindrical workpiece can be limited in a certain range.

In some other embodiments, the positioning block 8 may also have an arc-shaped groove, or a rectangular groove, to position workpieces of different shapes.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. A straightness measuring instrument, comprising:

a workbench (1) for placing a workpiece to be detected;

the support (2) is connected with the workbench (1), an X-displacement sensor (3) is arranged on the support (2), sliding parts (4) distributed along the X direction are further arranged on the support (2), sliding fit parts (5) are connected onto the sliding parts (4) in a sliding mode, and a Y-displacement sensor (6) is arranged on the sliding fit parts (5);

and the driving assembly (7) is connected with the sliding fit part (5) and is used for driving the sliding fit part (5) to move back and forth on the sliding part (4).

2. The straightness meter of claim 1 wherein:

the driving assembly (7) comprises a servo motor (71), two synchronous wheels (72) and a synchronous belt (73) sleeved on the two synchronous wheels (72), wherein the servo motor (71) is fixed on the bracket (2), one synchronous wheel (72) is in driving connection with the servo motor (71), the other synchronous wheel (72) is rotatably arranged on the bracket (2), and the sliding fit part (5) is fixed on the synchronous belt (73).

3. The straightness meter of claim 1 wherein:

the sliding part (4) adopts an air floatation guide rail, the sliding matching part (5) adopts an air floatation slide block, and the driving assembly (7) is connected with the air floatation slide block.

4. The straightness meter of claim 1 wherein:

the support (2) is arranged below the workbench (1), and an opening for the Y-displacement sensor (6) to pass through is formed in the workbench (1).

5. The straightness meter of claim 1 wherein:

the workbench (1) is provided with a positioning block (8).