Height detection tool for spherical screw

Abstract

The utility model discloses a height detection tool for a spherical screw, which comprises a laser tracker and a detection sleeve, the detection sleeve is provided with a central blind hole, the spherical screw can be inserted into the central blind hole, and the outer end face of the closed end of the detection sleeve is provided with a ball placing groove for placing a target ball. By using the detection tool, only the first spherical screw needs to be subjected to multi-point measurement, then other spherical screws directly adjust the height according to the coordinates of the target sphere, multi-point measurement does not need to be carried out one by one, time consumption is low, operation is convenient, stability is good, working efficiency is improved, and the problem that the efficiency of detecting the height of the spherical screw is low is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection tooling, and in particular relates to a height detection tooling for a spherical screw. Background Art

[0002] One of the important components on the spherical screw heliostat assembly platform, the spherical screw heliostat assembly platform refers to the Chinese invention patent with publication number CN113399220A and patent name "A method for gluing large heliostats" previously applied by the applicant. Heliostats are generally composed of multiple sub-mirrors spliced ​​on the assembly platform into a large mirror with a certain curvature, so as to focus solar radiation onto the tower heat absorber. A large number of spherical screws with the same specifications and one end being spherical are installed on the heliostat assembly platform. The spherical part is in contact with the mirror. Through precise detection and adjustment of the height of the spherical screws, these spherical screws form the curvature required by the design. The sub-mirrors are placed on these spherical screws for splicing to obtain the heliostats required by the design.

[0003] The height of the spherical screw refers to the distance from the center of the small ball at the top of the screw to the reference plane. The reference plane is a virtual plane in space, not a real plane. In addition, the size of the assembly platform is large and cannot be measured with conventional measuring tools. A laser tracker is required to carry out relevant measurements and use its "adjustment" function to guide the height adjustment of the spherical screw. After the height is adjusted in place, the spherical screw needs to be remeasured to check whether it meets the design height requirements.

[0004] Since the laser tracker needs to measure four points on the surface of the small ball at the top of the screw to obtain the coordinates of the center of the small ball at the top of the screw, and completing the height adjustment of a spherical screw requires at least two inspections, that is, to complete the height adjustment of a spherical screw, a total of at least eight points of the small ball at the top of the screw need to be measured. Since there are a large number of spherical screws that need to be adjusted, if eight points need to be measured for each spherical screw to complete the inspection tooling, it will take a long time, which increases the labor intensity of the inspectors and reduces work efficiency. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a height detection tool for a spherical screw. By using the detection tool, it is only necessary to perform multi-point measurement on the first spherical screw. Thereafter, the heights of other spherical screws are directly adjusted according to the target ball coordinates. There is no need to perform multi-point measurement one by one. This method saves time, is easy to operate, has good stability, improves work efficiency, and solves the problem of low efficiency in detecting the height of spherical screws.

[0006] The embodiments of the present invention are implemented by the following technical solutions:

[0007] A height detection tooling for a spherical screw, which includes a laser tracker and a detection sleeve. The detection sleeve is provided with a central blind hole into which the spherical screw can be inserted, and a ball placement groove for placing a target ball is provided on the outer end face of the closed end of the detection sleeve.

[0008] In an embodiment of the present invention, the cross-section of the bottom end of the central blind hole is conical.

[0009] In an embodiment of the present invention, the central blind hole and the spherical screw are in clearance fit.

[0010] In an embodiment of the present invention, the cross-section of the ball placement groove is conical.

[0011] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0012] In the present invention, a space coordinate system 1 is established by measuring with a laser tracker, with the reference plane as the XOY plane and the perpendicular line from the center of the spherical top of the screw to the reference plane as the Z axis. First, the coordinates of the center of the spherical top of the first spherical screw are measured by the laser tracker, then the detection sleeve is installed on the top of the first spherical screw, the target ball is placed on the detection sleeve, and then the coordinates of the center of the target ball are measured. Thus, the distance D from the target ball to the center of the spherical top of the first spherical screw is obtained. Then, the space coordinate system 1 is translated upward along the Z axis by a distance D to form a space coordinate system 2. In the space coordinate system 2, the Z-axis coordinate of the target ball at this time is the height of the spherical screw. Finally, the height coordinate of the target ball is compared with the designed height value of the first spherical screw, and the height of the first spherical screw is adjusted as needed. When the height coordinate of the target ball is the same as the designed height value of the spherical screw, it indicates that the height of this spherical screw has been adjusted to the designed height. After that, all spherical screws such as the second spherical screw and the third spherical screw can directly install the detection sleeve, and the height of the spherical screw can be judged by the height coordinate of the target ball, without the need to measure multiple points for each spherical screw one by one, and without the need to measure the center of the small ball at the top of each spherical screw one by one, which is convenient for the operator to adjust quickly. This detection tooling has good stability, improves work efficiency, and solves the problem of low efficiency in detecting the height of spherical screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic diagram of the tooling for detecting the height of the spherical screw in the present invention;

[0015] Figure 2 Schematic diagram of the detection sleeve in the present utility model;

[0016] Figure 3 Schematic diagram of establishing a coordinate system when the height tooling in the present utility model is in use.

[0017] Icon: 1 - Detection sleeve, 11 - Central blind hole, 12 - Ball placement groove, 2 - Target ball, 3 - Spherical screw, 31 - Top small ball. Detailed implementation manners

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0020] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of the present utility model, it should be noted that if terms such as "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "configured", "connected" are understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] Example

[0024] Please refer to Figure 1 and 2 The present embodiment provides a height detection tool for a ball screw, which includes a laser tracker and a detection sleeve 1. The laser tracker is an existing technology, and a finished product commonly used by technicians in this field can be used. Moreover, the built-in software of the laser tracker can set the measurement coordinate system and the measurement coordinate origin as needed. Moreover, the target ball 2 is also an existing finished product and is used in conjunction with the laser tracker. The detection sleeve 1 is provided with a central blind hole 11, and the cross section of the bottom end of the central blind hole 11 is conical. When in use, the ball screw 3 can be inserted into the central blind hole 11, so that the top ball 31 of the ball screw 3 directly reaches the bottom end of the central blind hole 11. The bottom end of the central blind hole 11 is stably matched with the top ball 31 through the conical structure. Moreover, the central blind hole 11 and the ball screw 3 are clearance-matched. During detection, the detection sleeve 1 will not shake freely to ensure detection accuracy. The outer end surface of the closed end of the detection sleeve 1 is provided with a ball placement groove 12 for placing the target ball 2. The cross section of the ball placement groove 12 is conical to ensure that the target ball 2 can be stably placed.

[0025] When using the tooling, since the heights of multiple spherical screws 3 need to be determined, first, a spatial coordinate system 1 is established with the reference plane as the XOY plane and the vertical line from the center of the small ball 331 at the top of the spherical screw 3 to the reference plane as the Z axis through laser tracker measurement. Select any spherical screw 3, install the detection sleeve 1 on the top of this spherical screw 3, and then place the target ball 2 on the detection sleeve 1. Use the laser tracker to first measure the center coordinates of the small ball 31 at the top of the spherical screw 3, and then measure the center coordinates of the target ball 2, thereby obtaining the distance D from the target ball 2 to the center of the top of the spherical screw 3, and then translate the spatial coordinate system 1 upward along the Z axis by a distance D to form a spatial coordinate system 2. In the spatial coordinate system 2, the Z axis coordinates of the target ball 2 are the spherical center coordinates. The height of the screw 3, and finally compare the height coordinate of the target ball 2 with the design height value of the spherical screw 3, and adjust the height of the spherical screw 3 as needed. When the height coordinate of the target ball 2 is the same as the design height value of the spherical screw 3, it indicates that the height of the spherical screw 3 has been adjusted to the design height. Thereafter, the second spherical screw 3, the third spherical screw 3 and all other spherical screws 3 can be directly installed with the detection sleeve 1, and the height of the spherical screw 3 can be judged by the height coordinate of the target ball 2. There is no need to perform multi-point measurement on each spherical screw 3, and there is no need to measure the center of the top ball 31 of each spherical screw 3, which is convenient for operators to quickly adjust. This detection tooling has good stability, improves work efficiency, and solves the problem of low efficiency in measuring the height of the spherical screw 3.

[0026] Please refer to Figure 3, use this inspection tool to measure the ball screw 3 with a specification of M10×150 and a ball head diameter of φ9.5mm on the heliostat assembly platform. The specific implementation steps are as follows:

[0027] Step 1: Use a laser tracker to measure and construct the required spatial coordinate system 1 according to the heliostat assembly platform and technical requirements;

[0028] Step 2: arbitrarily select a spherical screw 3 as the first spherical screw 3, use a laser tracker to measure the top ball 31 of the first spherical screw 3, and obtain the coordinates of the center of the ball, wherein the height from the center of the top ball 31 of the screw to the reference plane is H;

[0029] Step 3: Put the detection sleeve 1 of the detection tooling onto the spherical screw 3 measured in step 2, place the target ball 2 on the upper conical surface of the detection tooling, use a laser tracker to measure the target ball 2, obtain the coordinates of the center of the target ball 2, and calculate the height L of the center of the target ball 2 in the coordinate system 1;

[0030] Step 4: Calculate the distance D=LH between the center of the target ball 2 and the center of the spherical screw 3. When adjusting the height of different spherical screws 3, since the detection fixture remains constant, the D value remains constant, so the coordinate system 1 is moved up along the Z axis by a distance D to form a coordinate system 2. At this time, in the coordinate system 2, the Z-axis coordinate value of the center of the target ball 2 is the height distance from the center of the small ball 31 at the top of the spherical screw 3 to the reference plane, that is, the height parameter of the spherical screw 3 to be adjusted;

[0031] Step 5: Use the “adjustment” function of the laser tracker to guide the ball screw 3 to adjust to the designed height value, re-measure the coordinates of the center of the target ball 2 of the laser tracker, and continue to adjust if it does not meet the design requirements until it meets the design requirements;

[0032] Step 6: Attach the inspection tooling set to other spherical screws 3, adjust and measure according to step 5, directly measure the real-time coordinates of the target ball 2 in the coordinate system 2, and adjust the height of the current spherical screw 3 according to the height value of the target ball 2 until the height value of the target ball 2 meets the design requirements, indicating that the height of the current spherical screw 3 meets the design requirements.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A height detection tooling for a spherical screw, characterized in that, It includes a laser tracker and a detection sleeve. The detection sleeve is provided with a central blind hole into which the spherical screw can be inserted. An end face of the closed end of the detection sleeve is provided with a ball placement groove for placing a target ball.

2. The height detection tooling for a spherical screw according to claim 1, characterized in that, A cross-section of the bottom end of the central blind hole is conical.

3. The height detection tooling for a spherical screw according to claim 1, characterized in that, The central blind hole and the spherical screw are in clearance fit.

4. The height detection tooling for a spherical screw according to claim 1, characterized in that, A cross-section of the ball placement groove is conical.

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