阅读说明：本技术 一种以螺纹中径为基准检测光杆跳动的夹具及其检测方法 (Clamp for detecting polished rod bounce by taking pitch diameter of threads as reference and detection method thereof ) 是由 李艺 范玲 刘荆宏 王建宏 于 2021-06-28 设计创作，主要内容包括：本发明公开了一种以螺纹中径为基准检测光杆跳动的夹具及其检测方法,其中；底座设置的槽内放入若干滚轮插入若干轴连接,滚轮上面放有垫块,垫块上面平铺有两个三针,三针上面有压块。其检测方法,包括以下步骤；1)、将两根三针平行放置在垫块上,再将螺栓放置于三针上,使三针正好卡在螺栓螺纹牙型面的中径位置处；2)、配合杠杆千分表进行检测,用杠杆千分表表头接触检测位置轴向最高点,转动螺栓,测量一周即为以螺栓螺纹中径为基准的跳动检测,通过杠杆千分表读数来确定跳动检测结果。本发明高效、快速完成螺栓装夹,降低操作人员的人为误差,减轻操作人员手工操作的难度,提高检测效率。(The invention discloses a clamp for detecting the bounce of a polished rod by taking the pitch diameter of a thread as a reference and a detection method thereof, wherein the clamp comprises a clamp body, a clamp head and a clamp head; a plurality of rollers are placed in a groove formed in the base and inserted into a plurality of shafts for connection, cushion blocks are placed on the rollers, two three-wire needles are flatly paved on the cushion blocks, and pressing blocks are arranged on the three-wire needles. The detection method comprises the following steps; 1) placing the two three pins on the cushion block in parallel, and then placing the bolt on the three pins to ensure that the three pins are just clamped at the middle diameter position of the thread profile of the bolt; 2) and detecting by matching with a dial indicator, contacting the axial highest point of the detection position by using the head of the dial indicator, rotating the bolt, measuring for a circle, namely detecting the jumping by taking the pitch diameter of the thread of the bolt as a reference, and determining the jumping detection result by reading the dial indicator. The bolt clamping device can efficiently and quickly complete bolt clamping, reduce human errors of operators, reduce the difficulty of manual operation of the operators and improve the detection efficiency.)

1. A clamp for detecting the jumping of a polish rod by taking the pitch diameter of a thread as a reference is characterized in that; a plurality of rollers (5) are placed in a groove formed in the base (3) and are inserted into a plurality of shafts (4) for connection, a cushion block (2) is placed on the rollers (5), two three-needle gears (6) are tiled on the cushion block (2), and a pressing block (1) is arranged on the three-needle gears (6).

2. The clamp for detecting the bounce of the polished rod by taking the pitch diameter of the thread as the reference of claim 1, wherein the inner side surface of the groove arranged on the base (3) is provided with a hole for installing the roller.

3. The clamp for detecting the run-out of a polished rod with reference to the pitch diameter of the thread according to claim 1, wherein the rollers (5) are capable of rolling on the shafts (4).

4. The clamp for detecting the run-out of a polished rod with the pitch diameter of the thread as the reference of claim 1, wherein the rollers (5) are arranged at the same height.

5. A method for detecting the jumping of a polish rod by taking the pitch diameter of a thread as a reference comprises the following steps;

1) bolt clamping; placing two three-needle (6) on the cushion block (2) in parallel, and then placing the bolt (7) on the three-needle (6) to ensure that the three-needle (6) is just clamped at the middle diameter position of the thread profile of the bolt (7);

2) detecting; the testing is carried out by matching with a dial indicator, the head of the dial indicator contacts the highest point of the axial direction of the testing position, the bolt (7) is rotated, the jumping test which takes the pitch diameter of the thread of the bolt (7) as the benchmark is carried out after one circle of testing, and the jumping test result is determined by the reading of the dial indicator.

Technical Field

The invention belongs to the technical field of thread detection, particularly relates to a clamp for detecting the runout of a polished rod by taking the pitch diameter of a thread as a reference, and also relates to a detection method.

Background

Along with the continuous development of the aviation industry in China, the performance requirements on fasteners are higher and higher, higher requirements are also provided for scientific research and production of fastener products, and higher requirements are also provided for the overall dimensional tolerance of bolt fastener products. The adopted U.S. nutson thread measuring instrument in the prior art eliminates the fit clearance of the threads by precisely matching the high-precision taper nut with the measured threads, and realizes the measurement of the form and position tolerance of the threads of the bolt. The defect is that nuts with different specifications are required to be configured according to bolts with different specifications, the cost is high, the instrument belongs to an imported instrument, the purchasing, maintenance and repair time is long, the cost is high, and the situations of clamp abrasion and the like can be encountered.

Disclosure of Invention

The invention aims to overcome the defects and provide the clamp for detecting the polished rod bounce by taking the pitch diameter of the threads as the reference and the detection method thereof, which can efficiently and quickly finish bolt clamping, reduce the human error of operators, reduce the difficulty of manual operation of the operators and improve the detection efficiency.

The purpose of the invention and the main technical problem of solving the invention are realized by adopting the following technical scheme:

the invention relates to a clamp for detecting the bounce of a polished rod by taking the pitch diameter of a thread as a reference, which is characterized in that; a plurality of rollers are placed in a groove formed in the base and inserted into a plurality of shafts for connection, cushion blocks are placed on the rollers, two three-wire needles are flatly paved on the cushion blocks, and pressing blocks are arranged on the three-wire needles.

And the inner side surface of the groove arranged on the base is provided with a hole for mounting the roller.

The plurality of rollers may roll on a plurality of axes.

The rollers are arranged at the same height.

A method for detecting the jumping of a polish rod by taking the pitch diameter of a thread as a reference comprises the following steps;

1) bolt clamping; placing two three needles on a cushion block in parallel, and then placing a bolt on the three needles to ensure that the three needles are just clamped at the middle diameter position of the thread profile of the bolt;

2) detecting; and (3) detecting by matching with a dial indicator, contacting the axial highest point of the detection position by using the head of the dial indicator, rotating the bolt, measuring for one circle, namely, detecting the jumping by taking the pitch diameter of the thread of the bolt as a reference, and determining the jumping detection result by reading the dial indicator.

Compared with the prior art, the invention has obvious beneficial effects; the technical scheme shows that: a plurality of rollers are placed in a groove formed in the base and inserted into a plurality of shafts for connection, a cushion block is placed on each roller, two three-needle mechanisms are flatly paved on each cushion block, and pressing blocks are arranged on the three-needle mechanisms. The friction force generated between the roller and the cushion block is utilized to ensure that the relative displacement of the bolt in the rotating process is not changed, because the thread of the bolt is spiral, under the condition that the bottom cushion block is not moved, the bolt can move along with the spiral track of the thread, clockwise moves forwards, anticlockwise moves backwards, and the highest point in contact with the head of the dial indicator can also be changed, so that an effective value can not be judged, after the roller is added, the bolt can be ensured to be subjected to the reaction force exerted by the cushion block and can not move through the friction force generated between the roller and the cushion block in the rotating and rolling process, so that the highest point (namely the central line) in contact with the head of the dial indicator can be always detected in the rotating process of the bolt, and the jumping result based on the middle diameter of the thread can be obtained by rotating the bolt for one circle, in the testing process, a plurality of gyro wheels are installed on a plurality of axles, increase frictional force, a plurality of gyro wheels must be at same height and gapped each other can roll, the weight of briquetting can be guaranteed to rotate in-process can with bolt and three-pin complete contact, and do not produce the space, the three-pin is the three gauge needle that every group has the same nominal diameter of definite for thread measurement three-pin is, realized high-efficient, accomplish the bolt clamping fast, reduce operating personnel's human error, alleviate operating personnel manual operation's the degree of difficulty, improve detection efficiency.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2A-A;

FIG. 4 is a schematic view of the present invention with the compact removed;

fig. 5 is a state diagram of the present invention in use.

Reference numerals:

1. briquetting, 2, cushion, 3, base, 4, axle, 5, gyro wheel, 6, three-needle, 7, bolt.

Detailed Description

The details of the embodiments, structures, features and functions according to the present invention are described in the following detailed description and the preferred embodiments.

The purpose of the invention and the main technical problem of solving the invention are realized by adopting the following technical scheme:

the invention relates to a clamp for detecting the bounce of a polished rod by taking the pitch diameter of a thread as a reference, which is characterized in that; a plurality of rollers 5 are placed in a groove formed in the base 3 and are inserted into a plurality of shafts 4 for connection, a cushion block 2 is placed on the roller 5, two three-wire needles 6 are tiled on the cushion block 2, and pressing blocks 1 are arranged on the three-wire needles 6.

The inner side surface of the groove formed in the base 3 is provided with a hole for mounting the roller.

The rollers 5 can roll on the shafts 4.

The plurality of rollers 5 are arranged at the same height.

A method for detecting the jumping of a polish rod by taking the pitch diameter of a thread as a reference comprises the following steps;

1) bolt clamping; placing two three-needle 6 on the cushion block 2 in parallel, and then placing the bolt 7 on the three-needle 6 to ensure that the three-needle 6 is just clamped at the middle diameter position of the thread profile of the bolt 7;

2) detecting; and (3) detecting by matching with a dial indicator, contacting the axial highest point of the detection position by using the head of the dial indicator, rotating the bolt 7, measuring for one circle, namely, detecting the jumping by taking the pitch diameter of the thread of the bolt 7 as a reference, and determining the jumping detection result by reading the dial indicator.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.