Automatic alignment device for measuring machines

Abstract

The utility model relates to the technical field of automobile parts measurement, disclose a kind of automatic aligning device for measuring machine, for engine, gearbox and other automobile parts production line, solve the problem that the existing rigidity connection is easy to cause eccentricity to measure error, mechanical damage, easy to jam. Device includes device main body, 2 groups of diaphragm (2 metal diaphragms per group, interval fixed along main body axis), by diaphragm elastic deformation, realize measuring instrument along the X axis, Y axis 0-1mm floating perpendicular to main body axis, eliminate concentricity deviation, can assist to improve accuracy. The service life of the device is more than 5000 hours, the manufacturing cost is reduced by 20%-30% compared with the existing structure, different measuring instrument and workpiece are adapted, maintenance is convenient, and it is suitable for high-precision continuous measurement of production line.

Description

Technical Field

[0001] This utility model relates to the field of mechanical measurement technology, specifically an automatic self-aligning device for a measuring machine. It is mainly used in the connection between the measuring machine and the measuring head to realize automatic self-alignment of the measuring head in the X / Y axis direction, ensuring accurate alignment between the measuring head and the workpiece being measured, and improving measurement accuracy and efficiency. Background Technology

[0002] In the field of precision measurement of mechanical parts, the measurement accuracy of a measuring machine directly depends on the alignment accuracy between the measuring head and the workpiece being measured. When there is a positional deviation between the measuring head and the workpiece in the X / Y axis directions, it can easily lead to distorted measurement data and affect the judgment results of the geometric tolerances (such as dimensional accuracy and form tolerance) of the part. The current connection methods between the measuring machine and the measuring head mainly have the following problems: Rigid connection method: The measuring machine and the measuring head are connected by a fixed rigid structure without floating self-aligning function. If there is an installation deviation in the workpiece being measured or a slight deviation in the movement trajectory of the measuring machine, the measuring head cannot adaptively adjust its position, which can easily generate measurement stress, leading to a decrease in measurement accuracy or even damage to the measuring head or the workpiece being measured. Manual alignment: Some devices require manual adjustment of the X / Y axis position of the measuring head using knobs or shims. The alignment process relies on the operator's experience, takes a long time (alignment time for a single workpiece usually exceeds 2 minutes), and it is difficult to guarantee the consistency of alignment accuracy, which is not suitable for the high-efficiency requirements of automated measurement production lines. Therefore, there is an urgent need for an automatic self-aligning device for measuring machines that can achieve automatic floating self-alignment without manual intervention and has a stable connection, in order to solve the above-mentioned technical pain points. Utility Model Content

[0003] The purpose of this invention is to provide an automatic self-aligning device for measuring machines, which solves the problems of "low accuracy due to lack of automatic self-aligning function" and "poor efficiency of manual self-aligning" in the existing connection methods between measuring machines and measuring heads, and realizes adaptive floating self-aligning of the measuring head, thereby improving measurement accuracy and automation adaptability. To achieve the above objectives, this utility model provides the following technical solution: an automatic self-aligning device for a measuring machine, comprising: The device body 01 has one end fixedly connected to a measuring machine, providing an installation base for the entire device. The other end of the device body 01 is fastened with a first set of diaphragms 02 via bolts 06. A middle adjusting block 03 is fastened to the side of the first set of diaphragms 02 away from the device body 01 via bolts 06. The first set of diaphragms 02 has elastic deformation capability along the X-axis, allowing the middle adjusting block 03 to float in the X-axis direction. A second set of diaphragms 04 is fastened to the side of the middle adjusting block 03 away from the first set of diaphragms 02 via bolts 06. A measuring head module 05 is fastened to the side of the second set of diaphragms 04 away from the middle adjusting block 03 via bolts 06. The second set of diaphragms 04 enables floating in the Y-axis direction, achieving automatic centering of the measuring head module 05. The device also includes a surface cover 07. Preferably, the first set of diaphragms 02 includes at least two parallel diaphragm units. The diaphragm units are made of elastic metal material with a thickness of 0.1-0.8 mm. Their deformation direction is consistent with the X-axis direction, ensuring that the intermediate adjustment block 03 floats only along the X-axis and avoiding redundant displacement in other directions. Preferably, the intermediate adjustment block 03 is a metal block structure with threaded holes that are compatible with the bolt 06, ensuring a tight connection with the first set of diaphragms 02 and the second set of diaphragms 04, while having sufficient structural strength to prevent deformation during the self-aligning process. Preferably, the bolt 06 is an internal hexagonal head bolt with its axis perpendicular to the plane of the diaphragm. This ensures the fit between the diaphragm and the main body 01, the intermediate adjustment block 03, and the measuring head module 05, and prevents the diaphragm from undergoing pre-deformation when the bolt is tightened, thus affecting the self-aligning accuracy. Preferably, the number of the second group of diaphragms 04 is the same as the number of the first group of diaphragms 02, and the installation directions of the two groups of diaphragms are perpendicular to each other, to ensure floating transmission in the Y-axis direction and avoid tilting or offset of the measuring head module 05. Preferably, the main body 01 of the device is fixedly connected to the measuring machine through a flange and threaded structure, which ensures the relative position of the device as a whole and the measuring machine is stable and avoids measurement errors caused by loosening of the main body 01 of the device.

[0004] Compared with the prior art, the beneficial effects of this utility model are: 1. Automatic self-alignment for higher accuracy: The elastic deformation of the first set of diaphragms 02 in the X-axis direction drives the elastic deformation of the intermediate adjustment block 03 and the second set of diaphragms 04 in the Y-axis direction, and the measuring head module 05 achieves adaptive floating self-alignment without manual intervention, avoiding the experience error of manual adjustment and significantly improving the accuracy of measurement data. 2. Improved efficiency and adaptability to automation: After installation, this device can continuously achieve automatic centering. No additional centering operation is required during the measurement of a single workpiece. The measurement efficiency is more than 3 times higher than that of manual centering. The measurement time of a single workpiece can be shortened to less than 20 seconds. It can be directly adapted to automated measurement production lines to meet the high-efficiency inspection needs of batch parts. 3. Stable structure and longer service life: The first set of diaphragms 02 and the second set of diaphragms 04 are made of elastic metal materials, which have good fatigue resistance and can withstand tens of thousands of deformations without failure; the bolt 06 fastening method ensures that the connection of each component is reliable and avoids the risk of loosening. The overall service life of the device can reach more than 5 years. 4. Strong compatibility and wide range of applications: The main body 01 of the device can be adapted to the measuring machines of mainstream brands on the market by changing the adapter flange or adjusting the connection structure. The connection interface of the measuring head module 05 can be customized according to the requirements, and it is suitable for different types of measurement scenarios, such as dimensional measurement and geometric tolerance measurement. Attached Figure Description

[0005] Figure 1 is a schematic diagram of the arrangement structure of this utility model; Figure 2 is a schematic diagram showing the connection details between the internal diaphragm and the intermediate adjustment block of this utility model; In the diagram: 01, main body of the device; 02, first set of diaphragms; 03, intermediate adjustment block; 04, second set of diaphragms; 05, measuring head module; 06, bolt; 07, surface cover. Detailed Implementation

[0006] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Please refer to Figures 1-2. One embodiment of this utility model is an automatic self-aligning device for a measuring machine. The main body 01, elastic diaphragms 02 and 04, intermediate adjustment block 03, internal hexagonal head bolt 06, and surface cover 07 used in this application are all standard or customized parts that can be directly purchased on the market. Their connection methods, such as threaded connections, are existing technologies well known to those skilled in the art, and therefore will not be described in detail here. The device includes: a main body 01, which is fixedly connected to the Z-axis motion module of the measuring machine via a flange structure to ensure that the entire device moves synchronously with the measuring machine; the main body 01 has threaded holes adapted to bolts 06, and the first set of diaphragms 02, including two parallel spring steel diaphragms with a thickness of 0.1-0.8mm, is fastened to the main body 01 by hexagonal head bolts 06; the first set of diaphragms 02 is fastened to the intermediate adjusting block 03 by bolts 06 of the same specification, and the intermediate adjusting block 03 has symmetrical threaded holes, and the second set of diaphragms 04, which is the same as the first set of diaphragms, is connected by bolts 06; the second set of diaphragms 04 is fixedly connected to the measuring head module 05 by bolts 06, forming a complete transmission chain of "measuring machine - main body - first set of diaphragms - intermediate adjusting block - second set of diaphragms - measuring head module". Furthermore, when the measuring machine moves the measuring head module 05 toward the workpiece, if there is a positional deviation between the probe of the measuring head module 05 and the surface of the workpiece in the X / Y axis direction, the probe will be subjected to a small reaction force along the X / Y axis direction. This reaction force is transmitted to the elastic diaphragms 02 and 04 through the measuring head module 05, thereby causing the elastic diaphragms 02 and 04 to generate pressure along the X / Y axis direction. Under the action of pressure, the elastic diaphragms 02 and 04 undergo elastic deformation along the X / Y axis direction, causing the measuring head module 05 to float along the X / Y axis direction until the probe of the measuring head 05 is precisely aligned with the surface of the workpiece, achieving automatic self-alignment. After the measurement is completed, the reaction force of the workpiece on the probe disappears, and the first set of diaphragms 02 and the second set of diaphragms 04 return to their original shape under their own elastic action, causing the measuring head module 05 to return to its initial position, preparing for the next measurement. Furthermore, the metal material of the intermediate adjustment block 03 combines lightweight and high strength, which can reduce the load when the diaphragm deforms and ensure the self-aligning response speed; the 0.1-0.8mm thickness of the spring steel diaphragm has been verified by fatigue testing and can withstand 10 self-aligning actions per minute, with no significant deformation attenuation after 5000 hours of continuous operation; the axis of the internal hexagonal head bolt 06 is perpendicular to the plane of the diaphragm, and a torque wrench is used to control the tightening torque during tightening to avoid excessive compression of the diaphragm and pre-deformation, thus ensuring the stability of the self-aligning accuracy.

[0007] Working Principle: Before use, the main body 01 of the device is fixed to the measuring machine via a flange. The first set of diaphragms 02, the intermediate adjusting block 03, the second set of diaphragms 04, and the measuring head module 05 are then connected sequentially via bolts 06, ensuring a tight fit and no looseness. During measurement, the measuring machine moves the device towards the workpiece. If there is an X / Y axis deviation between the measuring head module 05 and the workpiece, the force applied to the measuring head is transmitted to the main body 01 via the elastic diaphragms 02 and 04, causing the elastic diaphragms 02 and 04 to deform along the X / Y axis, thus causing the measuring head module 05 to float and adjust until precise alignment is achieved. After measurement, the diaphragms elastically reset, and the measuring head 05 returns to its initial position. This is the complete working principle of this utility model. It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automatic self-aligning device for a measuring machine, characterized in that, The device includes a main body (01), a first set of diaphragms (02), an intermediate adjustment block (03), a second set of diaphragms (04), a measuring head module (05), bolts (06), and a surface cover (07). One end of the main body (01) is used to connect to a measuring machine, and the other end of the main body (01) is fastened to the first set of diaphragms (02) by bolts (06). The side of the first set of diaphragms (02) away from the main body (01) is fastened to the intermediate adjustment block (03) by bolts (06), and the first set of diaphragms (02) can undergo elastic deformation, driving the intermediate adjustment block (03) to float in the X-axis direction. The middle adjustment block (03) is fastened to the side away from the first diaphragm (02) by bolts (06) with a second diaphragm (04); the second diaphragm (04) and the first diaphragm (02) are installed perpendicular to each other, and the side of the second diaphragm (04) away from the middle adjustment block (03) is fastened to the measuring head module (05) by bolts (06). The second diaphragm (04) can undergo elastic deformation, which drives the measuring head module (05) to float in the Y-axis direction; the surface cover (07) is covered on the outside of each component.

2. The automatic self-aligning device for a measuring machine according to claim 1, characterized in that: The main body (01) of the device is fixedly connected to the measuring machine, and the main body (01) of the device is fastened to the first set of diaphragms (02) by bolts (06).

3. The automatic self-aligning device for a measuring machine according to claim 1, characterized in that: The measuring head module (05) is fixedly connected to the second diaphragm (04), and the measuring head module (05) and the second diaphragm (04) are fastened together by bolts (06).

4. The automatic self-aligning device for a measuring machine according to claim 1, characterized in that: The first group of diaphragms (02) and the second group of diaphragms (04) each include at least two parallel diaphragm units. The deformation directions of the two groups of diaphragm units are consistent with the X-axis and Y-axis directions, respectively, and the installation directions of the two groups of diaphragms are perpendicular to each other.

5. The automatic self-aligning device for a measuring machine according to claim 1, characterized in that: The bolt (06) is an internal hexagonal head bolt, and the axis of the bolt (06) is perpendicular to the plane of the diaphragm.

6. The automatic self-aligning device for a measuring machine according to claim 1, characterized in that: The membrane units of the first group of membranes (02) and the second group of membranes (04) are made of elastic metal material, and the thickness of the membrane unit is 0.1-0.8 mm.

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