CN111521100A - A kind of gun barrel equiv - Google Patents

Abstract

The invention belongs to the technical field of geometric precision detection of barrel equi-alignment rifling and discloses a barrel equi-alignment rifling winding degree measuring instrument which comprises a protective shell, a mandrel, a driving motor, a driving travelling wheel, a driven travelling wheel, a driving travelling wheel carrier, a driven travelling wheel carrier, a probe, a torsion spring, a tension spring, a swing frame, an inclination angle sensor, a laser ranging head, a rotary encoder, a cable and the like. The front end of the protective shell is provided with an inclination angle sensor and a laser ranging head, and the rear end of the protective shell is led out with a power supply and communication cable. The front probe, the driven walking wheel frame, the driving walking wheel frame, the rear probe and the rotary encoder frame are arranged on the mandrel. The walking wheels are driven by the speed reducing motor to walk in the rifling grooves, the front probes and the rear probes slide along the side walls of the rifling grooves in a contact mode, and the measurement of the rifling degree of the gun barrel is realized by utilizing a combined mode of a rotary encoder, an inclination angle sensor and a laser ranging head.

Description

A kind of gun barrel equiv

technical field

The invention belongs to the technical field of detection of the geometrical accuracy of rifling lines such as gun barrels, and particularly relates to a measuring instrument for the winding degree of rifling lines such as gun barrels.

Background technique

In modern weapons, the barrel rifling is one of the key structures in the artillery barrel. The function of the equal rifling is to rotate the projectile along the rifling when the artillery fires the projectile, giving it a certain linear initial velocity and rotational angular velocity. The trajectory is stable. Whether its curl meets the standard will have a huge impact on the quality of key combat performance indicators such as the firing accuracy, ballistic stability, and initial velocity of the artillery shell. In the process of artillery barrel processing, the quality will also be greatly affected by many factors such as the deformation of the shank, the system chatter, the material of the workpiece, the parameters of the drill bit, the cutting parameters, and the difficulty of chip removal. Therefore, the curl is an important indicator for evaluating the quality of a gun barrel, and its curl deviation must be closely monitored throughout the production process.

At present, many excellent achievements have been made in the research on the detection of barrel rifling at home and abroad, but compared with other measurement projects, the detection technology of rifling is relatively backward, and most of the tangle detectors used in actual production are The method based on template matching is used to compare the CCD image with the standard template to evaluate whether the curl is qualified or not. However, this method cannot accurately measure the twist of the barrel rifling. There is also the use of grating, but the device needs to be precisely adjusted and fixed, otherwise it will greatly affect the accuracy of straightness measurement, affected by site limitations and operator proficiency, and cannot achieve on-machine measurement. After the machining process is completed, the parts are removed for measurement, which affects the accuracy of subsequent machining.

Moreover, the price of such high-precision rifling entanglement detection instruments is very expensive, and it is difficult to be widely used.

SUMMARY OF THE INVENTION

In accordance with the above existing technical problems, the present invention provides a measuring instrument for the tangling degree of rifling such as gun barrels.

Technical scheme of the present invention:

A gun barrel and other rifling entanglement measuring instrument, comprising a protective shell, a mandrel, a driving motor, a driving wheel, a driving wheel, a driving wheel frame, a driving wheel frame, a probe, a torsion spring, and a tension spring , swing frame, tilt sensor, laser ranging head, rotary encoder, cable, etc. The protective shell is a cylindrical structure with a symmetrical rectangular hole on the top to expose the probe and the walking wheel. It is coaxially matched with the mandrel and fixed into a whole with a nut. The front end of the protective shell is installed with an inclination sensor and a laser ranging head. Power supply and communication cables are installed at the rear end of the protective case. The front probe is fixed at the front of the mandrel, and then the driven running wheel frame, the driving running wheel frame, the rear probe and the rotary encoder frame are assembled in sequence.

The two ends of the mandrel are sleeved with two mechanical angle probes, and two sets of torsion springs are installed inside the two probes to give opposite torsion forces to the two probes, so as to make the two probes It is closely fitted with the inner wall of the rifling to be measured, so as to prevent the probe from disengaging the side of the rifling groove during measurement.

The driven traveling wheel frame is fixed on the mandrel, and there are through holes at the upper and lower ends for fixing two driven traveling wheels; the active traveling wheel frame is sleeved on the mandrel and can rotate freely, and one is directly installed on the lower part of the active traveling wheel frame Geared motor, an active walking wheel is installed on the motor output shaft, a swing arm is directly installed on the upper part of the active walking wheel frame, and one end of the swing arm is also installed with a deceleration motor and an active walking wheel.

A tension spring is attached to the other end of the swing arm, and the other end of the tension spring is attached to the small hole in the lower part of the driving wheel frame. The tension of the tension spring makes the swing arm drive the upper and lower driving wheels against the groove wall of the rifled. Easy to walk.

The rotary encoder is used to measure the relative rotation angle between the front probe and the rear probe. The casing of the rotary encoder is fixed on the rotary encoder bracket, and the input shaft of the rotary encoder is fixed on the mandrel through the coupling.

When in use, put the gun barrel and other rifling winding degree measuring instruments into the open end of the gun barrel to be tested. Due to the action of the spring, the two driven wheels, the two driving wheels, and the two sets of probes are all pressed against the test tube. The inner wall of the gun barrel, at this time, give a certain voltage to the power supply cable, start the deceleration motor, and the two driving wheels drive the two driven wheels, so as to push the entire gun barrel to be measured along the rifling line. Forward; the inclination sensor measures the rotation angle of the overall barrel axis of the instrument.

The two sets of probes will continuously reflect the change of the angle between the two spans during the progress of the measuring instrument, and are converted into digital signals by the rotary encoder. The distance of the instrument is recorded during the traveling process of the distance head; the three sets of data will be aggregated and transmitted to the data processing terminal, and finally the output results will be calculated and processed to compare with the standard rifling angle value to obtain whether the rifling to be tested is standard.

Beneficial effects of the present invention: The present invention utilizes the mechanical probe contact measurement, so that the measurement of entanglement is changed from optical scanning measurement to mechanical measurement, and because uncertain errors such as diffuse reflection are avoided, the accuracy of measurement is increased, and the measurement accuracy can be improved. Realize on-machine measurement, easy to use.

Description of drawings

Fig. 1 is the overall appearance diagram of a kind of barrel and other rifling winding degree measuring instrument;

Fig. 2 is a kind of internal structure diagram of the barrel and other rifling winding degree measuring instrument;

Figure 3 is a schematic diagram of the assembly structure of the driving wheel frame and the reduction motor;

Figure 4 is a schematic diagram of the installation of the encoder and the encoder frame.

In the picture: 1 laser ranging head, 2 inclination sensor, 3 front probe, 4 probe, 5 driven traveling wheel, 6 driven traveling wheel frame, 7 tension spring, 8 driving traveling wheel, 9 reduction motor, 10 mandrel , 11 screws, 12 cables, 13 rotary encoders, 14 rotary encoder brackets, 15 rear probes, 16 shells, 17 active walking wheel frames, 18 torsion springs, 19 swing arms.

Detailed ways

In order to facilitate the description of the objectives, technical solutions and features of the present invention, the technical solutions in the embodiments of the present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in Figure 1 and Figure 2, a gun barrel and other equiv Frame 6, tension spring 7, driving wheel 8, deceleration motor 9, mandrel 10, screw 11, cable 12, rotary encoder 13, rotary encoder bracket 14, rear probe 15, protective shell 16, driving wheel frame 17. Torsion spring 18 and swing arm 19;

The cylindrical protective shell 16 is coaxially fixed with the mandrel 10, the inclination sensor 2 and the laser ranging head 1 are installed at the front end of the protective shell 16, and the power supply and communication cables 12 are installed at the rear end of the protective shell 16; the front probe 3 is set The front part of the mandrel 10 is fixed, and behind the front probe 3 are the torsion spring 18 , the driven wheel frame 6 , the driving wheel frame 17 , the torsion spring 18 , the rear probe 15 and the rotary encoder bracket 14 . Fitted on the mandrel 10 .

The front probe 3 and the rear probe 15 are square rod structures with a central circular hole. Small spherical wear-resistant probes 4 are installed at both ends of the square rod, and the distance between the probes 4 at both ends makes it fit into the barrel rifling groove. It is close to the bottom of the groove and cannot be stuck; the function of the two torsion springs 18 is to provide the necessary torsion force by means of the driven wheel frame 6 and the main travel wheel frame 17, so that the front probe 3 and the rear probe 15 are connected to the rifling of the rifling to be tested. The sidewalls fit snugly and prevent loosening from the sides of the rifling when measuring.

The driven wheel frame 6 is a plate-like structure with an intermediate sleeve. The upper and lower sides of the plate have a certain angle to adapt to the angle of the barrel rifling. A driven wheel 5 is installed on the upper and lower surfaces of the plate. The distance between the axes of the traveling wheel 5 makes it just so that the driven traveling wheel 5 is inserted into the barrel rifling groove, and travels easily.

As shown in FIG. 3 , the driving wheel frame 17 also has a plate-like structure with an intermediate sleeve, which is sleeved on the mandrel 10 and can be freely rotated. The lower part of the driving wheel frame 17 is directly installed with a deceleration motor 9 through screws 11, and the deceleration motor is mounted on the lower part of the driving wheel frame 17. 9. A driving wheel 8 is installed on the output shaft, a swing arm 19 is hingedly installed on the upper part of the driving wheel frame 17, and one end of the swing arm 19 is also installed with a deceleration motor 9 and a driving wheel 8.

The other end of the swing arm 19 is hung with a tension spring 7, and the other end of the tension spring 7 is hung in the small hole at the lower part of the driving wheel frame 17. Under the pulling force of the tension spring 7, the swing arm drives the upper and lower driving wheels The outer cylindrical surface of 8 is close to the bottom of the groove of the rifling, and it forms enough friction to facilitate walking.

As shown in FIG. 4 , the rotary encoder 13 is used to measure the relative rotation angle of the span between the front probe 3 and the rear probe 15 . The housing of the rotary encoder 13 is fixed on the rotary encoder bracket 14 . The rotary encoder 13 The input shaft is fixed on the mandrel 10 through the coupling.

When the barrel rifling measurement is to be carried out, put the gun barrel and other rifling entanglement measuring instruments into the open end of the barrel to be measured, due to the action of the spring, the two driven wheels 5, the two driving wheels 8, the two The probe probes 4 of the group are all pressed against the inner wall of the gun barrel to be tested. When the power is turned on, the deceleration motor 9 is started, the two driving wheels 8 are driven, and the two driven wheels 5 follow the movement, thereby promoting the entire gun barrel. The entanglement measuring instrument advances along the rifling in the gun barrel to be measured; the inclination sensor 2 measures the rotation angle of the instrument as a whole along the barrel axis, and the relative swing of the front probe 3 and the rear probe 15 during the progress of the measuring instrument will continue. Reflecting the change of the angle between the two, it is converted into a digital signal by the rotary encoder 13, and the laser ranging head 1 records the distance of the instrument during the traveling process; these three sets of data will be aggregated and transmitted to the external data processing terminal, and finally Comparing the output result with the value of the standard rifling angle after calculation processing, it can be evaluated whether the rifling to be tested is standard.

Claims (1)

1. The instrument for measuring the winding degree of the equi-aligning rifling of the gun barrel is characterized by comprising a laser ranging head (1), an inclination angle sensor (2), a front probe (3), a probe (4), a driven travelling wheel (5), a driven travelling wheel carrier (6), a tension spring (7), a driving travelling wheel (8), a speed reducing motor (9), a mandrel (10), a screw (11), a cable (12), a rotary encoder (13), a rotary encoder bracket (14), a rear probe (15), a protective shell (16), a driving travelling wheel carrier (17), a torsion spring (18) and a swing arm (19);

the cylindrical protective shell (16) is coaxially matched and fixed with the mandrel (10), the front end of the protective shell (16) is provided with the tilt angle sensor (2) and the laser ranging head (1), and the rear end of the protective shell (16) is provided with a power supply and communication cable (12); the front probe (3) is sleeved on the front part of the mandrel (10) and is fixed, and a torsion spring (18), a driven walking wheel frame (6), a driving walking wheel frame (17), a torsion spring (18), a rear probe (15) and a rotary encoder bracket (14) are sequentially sleeved on the mandrel (10) behind the front probe (3);

the front probe (3) and the rear probe (15) are of square rod structures with a middle round hole, the two ends of each square rod are respectively provided with a micro spherical wear-resistant probe (4), the distance between the probes (4) at the two ends enables the probes to be just embedded into a line slot of a bore of a gun barrel, and the probes are close to the bottom of the slot and cannot be clamped; the two torsion springs (18) are used for providing necessary torsion force by virtue of the driven walking wheel frame (6) and the main walking wheel frame 17, so that the front probe (3) and the rear probe (15) are tightly attached to the side wall of the rifling to be measured, and the side surface of the rifling is prevented from loosening during measurement;

the driven travelling wheel carrier (6) is of a plate-shaped structure with a middle sleeve, the upper surface and the lower surface of the plate have a certain angle to adapt to the rifling winding angle of the gun barrel, the upper surface and the lower surface of the plate are respectively provided with one driven travelling wheel (5), and the distance between the axes of the two driven travelling wheels (5) enables the driven travelling wheels (5) to be just embedded into the rifling grooves of the gun barrel to easily travel;

the active walking wheel carrier (17) is also provided with a plate-shaped structure with a middle sleeve, is sleeved on the mandrel (10) and can freely rotate, the lower part of the active walking wheel carrier (17) is directly provided with a speed reducing motor (9) through a screw (11), an output shaft of the speed reducing motor (9) is provided with an active walking wheel (8), the upper part of the active walking wheel carrier (17) is hinged with a swinging arm (19), and one end of the swinging arm (19) is also provided with the speed reducing motor (9) and the active walking wheel (8);

the other end of the swing arm (19) is articulated with a tension spring (7), the other end of the tension spring (7) is articulated in a small hole at the lower part of the active walking wheel carrier (17), and the swing arm drives the outer cylindrical surfaces of the upper active walking wheel (8) and the lower active walking wheel (8) to lean against the bottom of the rifling groove under the tension action of the tension spring (7) to form enough friction force for walking;

the rotary encoder (13) is used for measuring the relative rotation angle of the span between the front probe (3) and the rear probe (15), the shell of the rotary encoder (13) is fixed on the rotary encoder support (14), and the input shaft of the rotary encoder (13) is fixed on the mandrel (10) through a coupling.

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