CN202571327U - Detecting and locating device for spiral track on numeral control thread-repairing lathe - Google Patents

Abstract

The utility model provides a detection and positioning device for a spiral trajectory on a numerically controlled thread repair lathe, which is characterized in that: the device mainly includes a bed, a bedside box and a tail table; the bedside box and the tail table are arranged on the bed, and the bedside box A main shaft capable of rotating is installed horizontally inside, and a front chuck and a rear chuck are respectively installed on the front end and rear end of the main shaft; there are also sets of bracket rollers on one side of the bed; One end of the headbox is provided with a positioning cone device, and a phase detection sensor for electronic detection and positioning of the thread phase is also provided between the headbox and the tail table. The utility model significantly improves the technical level, quality level and economic benefits of drill pipe thread repairing.

Description

The detection and positioning device of the spiral track on the CNC thread repair lathe

technical field

The utility model patent is used in the field of metal cutting and processing, and relates to an auxiliary positioning device for repairing and turning the old internal and external threads at both ends of long pipe workpieces such as used petroleum drill pipes and drill collars by a numerically controlled pipe thread lathe. the

Background technique

In the petroleum and geological drilling industry, the drill bits that are drilled into the ground thousands of meters deep are composed of hundreds of drill pipes and drill collars, which are screwed one by one by the threads at both ends, and connected to the ground drilling rig. The ground drilling rig passes through these The drill pipe and drill collar transmit the torque to the drill bit. These drill pipes and drill collars need to be unloaded one by one after completing the drilling work of a well, recovered, repaired, and used repeatedly. In the maintenance work of drill pipes and drill collars, turning and repairing the inner and outer tapered joint threads at both ends is one of the most important tasks. A large number of tapered tool joint threads require reconditioning turning operations each year. the

At present, people are all on mechanical pipe thread lathes to the repair turning processing of tapered drill pipe joint threads at both ends of drill pipe and drill collar, and are manually operated by workers. The reason for implementing the manual operation of the mechanical lathe to repair the turning taper thread is that the manual operation can easily adjust the tip of the tool to the groove of the thread, and then during the spiral movement of the tool relative to the workpiece, the two sides of the original triangular thread One side surface is evenly turned off one layer, and the rust, pitting, glue marks, scratches and stress fatigue layers are turned off to meet the processing requirements for thread repair. The advantages of this kind of mechanical repairing and turning tapered thread are: the radial cutting amount of the thread is small. According to the principle of the taper, the length and dimension of the drill pipe are reduced every time the thread is repaired, and the number of repairs of the drill pipe is increased. Rod life is extended. the

In the field of machinery manufacturing, the use of CNC lathes to turn taper threads has obvious technical advantages over mechanical lathes, such as high thread precision, good surface quality, and high processing efficiency. Therefore, CNC lathes have been widely used in the manufacture and processing of new threads. In the thread turning function of the existing CNC lathes, as long as the thread parameters and the tool installation position are determined, the helical trajectory of the tool relative to the spindle of each lathe is fixed and inherent. The inherent spiral trajectory is different, but this inherent spiral trajectory cannot be known by people only by their senses. It is precisely because of this inherent law of the helical trajectory that for old workpieces that are randomly clamped to the lathe spindle chuck and have threads, the workpiece helix does not coincide with the inherent cutting helical trajectory on the machine tool spindle, and the two helixes The phase difference between them is random, and the tip of the tool cannot be processed along the groove of the old thread of the workpiece, resulting in chaotic buckling. According to the current CNC lathe technology, the method of CNC thread repair is to remove all the old threads from the tooth root outwards, and re-turn new threads. The deficiencies of this technological level of CNC repairing turning tapered thread are: the radial cutting amount of the thread is large, the length and dimension of the drill pipe after turning are greatly reduced, the number of repairs of the drill pipe is reduced, and the economic benefit is not good. This is the only reason why CNC lathes cannot be directly applied to the field of old thread repair processing at present. the

Contents of the invention

Purpose of the utility model: This utility model provides a detection and positioning device and method for the helical track on a numerically controlled thread repair lathe. the

Technical solution : the utility model is realized through the following technical solutions:

A detection and positioning device for a helical trajectory on a numerically controlled thread repair lathe, characterized in that the device mainly includes a bed, a headboard and a tail table; the head box and the tail table are arranged on the bed, and a The main shaft that can be rotated is equipped with a front chuck and a rear chuck on the front end and rear end of the main shaft respectively; there are also multiple sets of idler rollers on the side of the bed; One end of the machine is provided with a positioning cone device, and a phase detection sensor for electronic detection and positioning of the thread phase is also provided between the head box and the tail table.

The tail table is set on the bed which can move back and forth through the guide rails, and the bed is also provided with a hydraulic cylinder to push the tail table to move back and forth. the

The positioning cone device is a structure for positioning the workpiece to be repaired axially and radially during use. the

The positioning cone device is a positioning cone sleeve structure that can be placed on the external thread to be repaired. The inner diameter of the positioning cone device matches the thread outer diameter of the external thread workpiece to be repaired. the

The positioning cone device is a positioning cone shaft structure that can extend into the internal taper thread to be repaired, and the outer diameter of the positioning cone device matches the thread inner diameter of the internal thread workpiece to be repaired. the

The phase detection sensor ⑾ is a contact or non-contact sensor. the

为：  The detection and positioning method for the helical track on the NC thread repair lathe implemented by the above-mentioned detection and positioning device for the helical track on the NC thread repair lathe is characterized in that: the steps of the method are as follows: pass the workpiece to be repaired before passing through the main shaft and the rear chuck. After the chuck, it extends to the positioning cone device installed at the front end of the tail table. The old taper thread at the front end of the workpiece is matched with the positioning cone device. At this time, the axial and radial positions of the old thread of the workpiece to be repaired have been determined by the positioning cone device. Sure, the circumferential position is still a random rule; after the above positioning is completed, use the thread phase electronic detection positioning sensor to measure the distance from the high point or low point of the helix on the specific busbar of the thread to the fixed end face of the thread to determine the thread phase, if it has been measured before The distance between a certain low point of the inherent cutting helical trajectory of the lathe spindle and the thread end surface that has been stored in the phase detection device is L ₀ , and the distance of the workpiece measured this time is L ₁ , then the clamping The phase difference between the thread to be repaired and the inherent cutting thread trajectory of the spindle

for:

Among them: T is pitch;

n=0, 1;

0 ≤ ＜360°

Utilize the existing CNC lathe spindle positioning stop function to make the spindle idling After stopping at the angle, clamp the drill pipe workpiece in the order of first clamping the rear chuck and then clamping the front chuck, and then retreat the tail table to the rear position. At this time, the workpiece clamped on the lathe spindle chuck The helix of the old thread to be repaired on any drill pipe, drill collar and other existing threaded workpieces coincides with the inherent cutting helical track on the lathe spindle, and the positioning work is completed.

When the thread to be repaired is an external thread, the positioning cone device is a structure that can be sleeved on the periphery of the thread to be repaired, and the inner diameter of the positioning cone device matches the outer diameter of the thread to be repaired. the

When the thread to be repaired is an internal thread, the positioning cone device is a structure that can extend into the thread to be repaired, and the outer diameter of the positioning cone device matches the inner diameter of the internal thread to be repaired. the

Advantages and effects :

The utility model provides a detection and positioning device and method for a spiral trajectory on a numerically controlled thread repair lathe, which mainly includes two parts, a mechanical positioning device and an electronic detection device. The front end of the tailstock is fixedly installed with a mechanical positioning taper sleeve that is coaxial with the machine tool spindle and matches the outer diameter and end surface of the turned external thread to be repaired, or a mechanical positioning taper shaft that matches the inner diameter and end surface of the turned internal thread to be repaired. , the axial position of the mechanical positioning cone device is determined by the position of the tail stage on which it is installed on the tail stage guide rail.

The utility model can determine the parameters such as the axial position, the radial position and the circumferential phase of the helix of the old thread on each clamped drill pipe, thereby realizing the old drill pipe to be installed on the spindle chuck of the lathe The thread line coincides with the inherent cutting helical track on the spindle, which creates conditions for the completion of CNC repair turning thread, and then achieves the work goal of CNC repair turning thread. The utility model can realize the repair turning of the old thread to be repaired. The utility model integrates the advantages of high thread processing precision, good surface quality and high processing efficiency of the CNC lathe, and the thread repair of the mechanical lathe has small radial cutting amount and loss of drill rod length. Small pluses in one. The utility model significantly improves the technical level, quality level and economic benefits of drill pipe thread repairing. the

Description of drawings:

Fig. 1 is the structural representation of the utility model.

The specific embodiment: the utility model is further described below in conjunction with the accompanying drawings:

As shown in Figure 1, the utility model provides a detection and positioning device for a spiral track on a CNC thread repair lathe, the device mainly includes a bed 1, a bedside box 8 and a tail table 3; the bedside box 8 and the tail table 3 are arranged On the bed 1, a main shaft 7 capable of rotating is installed horizontally in the bed head box 8, and a front chuck 6 and a rear chuck 9 are respectively installed on the main shaft at the front end and the rear end of the bed head box 8; One side of the bracket 1 is also provided with multiple groups of idler rollers 10; a positioning cone device 4 is provided at the end of the tail table 3 facing the head box 8, and a screw phase screw device is also provided between the head box 8 and the tail table 3. Phase detection sensor 11 for electronic detection of positioning. The phase detection sensor 11 is a contact or non-contact sensor.

The tail table 3 is arranged on the bed 1 so as to move back and forth through the guide rails, and the bed 1 is also provided with a hydraulic cylinder 2 for pushing the tail table 3 to move back and forth. The positioning cone device 4 is a structure for positioning the workpiece to be repaired axially and radially during use. the

Locating cone device 4 is two kinds, as follows:

The locating cone device 4 is a locating taper sleeve structure that can be sleeved on the external taper thread to be repaired, and the inner diameter of the locating cone device matches the thread outer diameter of the external thread workpiece to be repaired.

The positioning cone device 4 is a positioning cone shaft structure that can extend into the internal taper thread to be repaired, and the outer diameter of the positioning cone device matches the thread internal diameter of the internal thread workpiece to be repaired. the

The accompanying drawing shows the situation when the taper thread to be repaired on the workpiece 5 is an external thread, and the positioning cone device 4 is a plate-shaped inner taper sleeve at this time; if the taper thread to be repaired on the workpiece 5 is an internal thread, then the label The part of 4 is just positioning shaft, and what accompanying drawing shows is the state that workpiece 5 and positioning sleeve are cooperating. the

In addition, the utility model also provides a mechanical positioning method of the spiral trajectory on the CNC thread repair lathe implemented by the detection and positioning device. The threaded part passes through the main shaft 7, the rear chuck 9 and the front chuck 6, and extends to the positioning cone device installed at the front end of the tail table. The tail table 3 moves to the main shaft end under the push of the hydraulic cylinder 2, and the front end of the workpiece 5 is The tapered thread is matched with the positioning cone device. When the thread of the workpiece to be repaired is an external thread, the positioning cone device is a structure that can be set on the periphery of the thread to be repaired, and the inner diameter of the positioning cone device matches the outer diameter of the thread to be repaired; when the thread to be repaired is an internal thread , the positioning cone device is a structure that can extend into the thread to be repaired, and the outer diameter of the positioning cone device matches the inner diameter of the internal thread to be repaired. the

为：  At this time, the axial and radial positions of the old thread of the workpiece have been determined by the positioning cone device, and the circumferential position is still random; after the above positioning is completed, use the thread phase electronic detection positioning (phase detection) sensor to measure the specific busbar of the thread The distance between the high point or low point of the upper helix and the fixed end face of the thread is used to determine the thread phase. is L ₀ , and the distance of the workpiece measured this time is L ₁ , then the phase difference between the thread to be repaired and the inherent cutting thread trajectory of the spindle in this clamping

for:

Among them: T is pitch;

n=0, 1;

＜360° 0 ≤

＜360°

角度处停止之后，再按先夹紧后卡盘，后夹紧前卡盘的顺序夹紧钻杆工件，然后将尾台退到后位，此时，被夹紧到车床主轴卡盘上的任意钻杆、钻铤等已有螺纹工件上待修复旧螺纹的螺旋线都与车床主轴上的固有切削螺旋轨迹相重合，定位工作完成。 Utilize the existing CNC lathe spindle positioning stop function to make the spindle idling

After stopping at the angle, clamp the drill pipe workpiece in the order of first clamping the rear chuck and then clamping the front chuck, and then retreat the tail table to the rear position. At this time, the workpiece clamped on the lathe spindle chuck The helix of the old thread to be repaired on any drill pipe, drill collar and other existing threaded workpieces coincides with the inherent cutting helical track on the lathe spindle, and the positioning work is completed.

This ensures that in the subsequent thread turning process, the tool tip can be aligned with the groove of the old thread, and in the helical relative turning movement between the tool and the workpiece, it is ensured that the two sides of the old triangular thread can be evenly cut off by the tool. , to meet the work requirements of thread repair. the

After having shown application device of the present utility model in the accompanying drawing, on the machine tool, the main parts relevant to the positioning and clamping workpiece, the saddle, slide plate, tool rest and other parts on the lathe are not described in detail. the

Claims (6)

1. a kind of numerical control screw thread repairs the detection positioner of helical trajectory on lathe, it is characterised in that：The device mainly includes lathe bed（1）, headstock（8）With tail platform (3)；(3) (8) headstock be arranged on lathe bed with tail platform（1）On, headstock（8）Inside it is horizontally installed with the main shaft that can be rotated（7）, in main shaft（7）Front-end and back-end on be separately installed with front chuck（6）And rear chuck（9）；In lathe bed（1）Side be additionally provided with the multigroup carrying roller of bracket（10）；Be provided with the one end of tail platform (3) towards headstock (8) positioning wimble device (4), headstock (8) with tail platform (3) between be additionally provided with for screw thread phase detection of electrons position phase detection sensor (11).

2. numerical control screw thread according to claim 1 repairs the detection positioner of helical trajectory on lathe, it is characterised in that：(3) tail platform is arranged on lathe bed by what guide rail can be moved forward and backward（1）On, in lathe bed（1）On be additionally provided with and promote the hydraulic jack that (3) moves forward and backward of tail platform (2).

3. numerical control screw thread according to claim 1 repairs the detection positioner of helical trajectory on lathe, it is characterised in that：(4) positioning wimble device is by the structure axially and radially located of workpiece to be repaired when using.

4. numerical control screw thread according to claim 3 repairs the detection positioner of helical trajectory on lathe, it is characterised in that：Positioning wimble device is (4) for that can be enclosed within the locating cone nested structure on external screw thread to be repaired, and the internal diameter of the positioning wimble device is engaged with the major diameter of thread of external screw thread workpiece to be repaired.

5. numerical control screw thread according to claim 3 repairs the detection positioner of helical trajectory on lathe, it is characterised in that：Positioning wimble device is (4) for that can put in the locating cone axle construction of inside tapered thread to be repaired, and the external diameter of the positioning wimble device is engaged with the bottom diameter of internal thread workpiece to be repaired.

6. numerical control screw thread according to claim 1 repairs the detection positioner of helical trajectory on lathe, it is characterised in that：(11) phase detection sensor is contact or noncontacting proximity sensor.

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