CN102735865A - Method for testing firing pin speed in firing process of mechanical firing mechanism - Google Patents

Abstract

The invention relates to a method for testing a firing pin speed in a firing process of a mechanical firing mechanism, which belongs to the technical field of testing. The method comprises the following steps of: measuring quality of a firing pin, a firing pin spring, a moving body and the like; assembling a fixed breechblock and placing the moving body; firing to realize the firing movement of the firing mechanism and knocking the moving body by the firing pin; obtaining a moving speed of the knocked moving body; and figuring out a speed of knocking the moving body by the firing pin, namely the speed of percussion primer of the firing pin when the firing mechanism fires, thereby finishing the speed test of the firing pin of the mechanical firing mechanism. Compared with the prior art, the method can be used for testing the speed of the percussion primer of the firing pin when the mechanical firing mechanism fires and has the advantages of accurate test result, simple structure and easiness for realization.

Description

The method of firing pin velocity test when a kind of mechanical type firing lock is pulled the trigger

Technical field

The method of firing pin velocity test belongs to technical field of measurement and test when the present invention relates to the percussion of a kind of mechanical type firing lock.

Background technology

Firing lock is the mechanism that to the fire in a stove before fuel is added it is lighted.The principle of work of mechanical type firing lock is to utilize the mechanical impact fire in a stove before fuel is added that ignites.The mechanical type firing lock is divided into two kinds of firing pin type and hammer formulas by structure, and typical striker type firing mechanism is seen Fig. 1, and striker type firing mechanism is generally stirred son axle 5, stirred sub-bolt bar 6, bolt bar spring 7, stirred son 8 and form by firing pin 2, striker spring 3, the right side.Stirring son 8 stirs son axle 5 with the right side and when unlatching, dials the counterattack pin.Mechanism action is following:

During unlatching, cranking arm 4 rotates, and the lobe of cranking arm on 4 is pressed right lever end of stirring son axle 5; The right side is stirred 5 drives of son axle and is stirred son 8 rotations; 2 groups of firing pins are returned, and at this moment compression striker spring 3 is stirred sub-bolt bar 6 and under the effect of bolt bar spring 7, is moved to the left (from the breech eyes front); Stir shallow slot on the sub-bolt bar 6 and block and stir son 8, firing lock is arm-to-arm.After closing door bolt, the push rod in the breech promotes to stir sub-bolt bar 6 to the right, makes the deep trouth of stirring on the sub-bolt bar 6 over against stirring sub 8 lower ends, and it is unfettered to stir son 8, and firing pin 2 travels forward under striker spring 3 effects, realizes firing action.

For the reliability that guarantees to pull the trigger, the energy of firing pin percussion primer should have enough big speed greater than the fire in a stove before fuel is added institute energy requirement that ignites in the time of promptly will guaranteeing firing pin percussion primer.

The speed of firing pin does not still have feasible way at present when confirming firing pin percussion primer, and subject matter is that the firing pin movement travel is little and speed is bigger in the percussion process, and the firing pin overhang is generally 2.0～3.8mm, and speed is generally 5～6m/s.

Summary of the invention

The objective of the invention is in order to overcome the defective of prior art the test problem of firing pin speed when solving firing pin percussion primer, the method for firing pin velocity test when proposing a kind of mechanical type firing lock percussion.

The inventive method realizes through following technical proposals.

The method of firing pin velocity test when a kind of mechanical type firing lock of the present invention is pulled the trigger, its basic implementation process is following:

Make firing lock realize firing action, let firing pin hit static movable body, obtain movable body, calculate the speed of firing pin when trying to achieve firing pin percussion primer then by the speed after clashing into.

Require:

When 1, placing movable body, the relative position of firing pin and movable body should be identical with fire in a stove before fuel is added relative position with firing pin under the * * firing lock nominal situation, and is identical during firing pin percussion primer under movement travel and the firing lock nominal situation during assurance firing pin percussion movement body;

The movable body hardness of 2, being clashed into will be higher than firing pin, to reduce the energy loss in the knockout process.

The test philosophy explanation:

According to the law of conservation of momentum:

MV ₁＝MV ₂+mv ₂ (1-1)

According to law of conservation of energy:

$\frac{1}{2}M{V}_1^2=\frac{1}{2}\mathrm{<figure-callout\; id="2"\; label="M\; V"\; filenames="HSA00000731920200011.png"\; state="\{\{state\}\}">M</figure-callout>}{V}_{}^{}{}_2^2+\frac{1}{2}m{v}_2^2+Q---(1-2)$

(1-1) obtain V with (1-2) simultaneous ₁And v ₂Between relation:

$V_1=\frac{M+m}{2M}{v}_2+\frac{Q}{m{v}_2}---(1-3)$

Ignore energy loss Q, can be similar to and obtain V ₁:

$V_1=\frac{M+m}{2M}{v}_2---(1-4)$

M in the formula---firing pin quality,

V ₁---the speed of firing pin during bump,

V ₂---the speed of bump back firing pin,

M---movable body quality,

v ₁---movable body speed before being impacted, static v before being impacted ₁=0,

v ₂---clashed into the speed of back movable body,

Q---energy loss in the collision process.

1) utilizes the quality and the record of balance measurement firing pin 2, striker spring 3, steel ball 12;

2) will be in the breechblock assembling 9 of waiting the state of pulling the trigger and be placed on the platform, the breechblock minute surface up and level; Steel ball 12 is positioned on the pedestal 13, identical during firing pin percussion primer under movement travel and the firing lock nominal situation when pedestal 13 guarantees firing pins 2 bump steel balls 12;

3) scale 10 is placed on breechblock assembles on 9 minute surfaces and it is vertical with minute surface to keep, 0 and steel ball central horizontal; High-speed camera 11 aligns scale 10 and takes;

4) artificial percussion, firing pin 2 be at the striker spring 3 effects bump steel ball 12 that travels forward down, ejects fast after steel ball 12 is clashed into and move upward, and steel ball 12 motion processes are by high-speed camera 11 records;

5) steel ball 12 motion processes with high-speed camera 11 record import computer, through playback at a slow speed, get the average velocity in the 100mm after steel ball 12 take-offs, as steel ball 12 by the speed after hitting; The quality of the firing pin 2 that joint step 1 obtains, striker spring 3, steel ball 12 can calculate the movement velocity of trying to achieve when bump firing pin 2 by formula (1-4)

.

Wherein M, m, v ₂Can obtain accurate numerical value through test, can calculate V by formula (1-4) then ₁

Beneficial effect

The inventive method, the contrast prior art, can the test mechanical firing lock speed of firing pin percussion primer during percussion, it is accurate to have test result, the effect of simple in structure, easy realization.

Description of drawings

Fig. 1 is a striker type firing mechanism structural representation in the prior art;

Fig. 2 is the structural representation of institute's operative installations in the present embodiment;

Wherein, 1-, the 2-firing pin, the 3-striker spring, 4-cranks arm, and 5-stirs on the right side son axle, and 6-stirs sub-bolt bar, 7-bolt bar spring, 8-stirs son, the assembling of 9-breechblock, 10-scale, 11-high-speed camera, 12-steel ball, 13-pedestal.

Embodiment

Elaborate below in conjunction with the embodiment of accompanying drawing to the inventive method,

The method of firing pin velocity test when a kind of mechanical type firing lock is pulled the trigger, its concrete steps comprise:

Mass measurements such as step 1, firing pin 2, striker spring 3, movable body.

Movable body is placed in step 2, fixedly breechblock assembling 9; Should confirm the position of movable body according to firing pin under the firing lock nominal situation and fire in a stove before fuel is added relative position with respect to breechblock, identical during firing pin percussion primer under movement travel and the firing lock nominal situation when guaranteeing firing pin percussion movement body.

Step 3, percussion make firing lock realize firing action, firing pin percussion movement body.

Step 4, obtain movable body by the movement velocity after clashing into.

The speed of step 5, firing pin percussion primer when the speed when calculating firing pin percussion movement body is the firing lock percussion.

Firing pin velocity test when since then, just having accomplished the percussion of mechanical type firing lock.

Embodiment

The speed of firing pin percussion primer during present embodiment test percussion.Movable body is selected φ 10mm steel ball 12GB/T308-2002, Rockwell's hardness HRC60～66 for use; Utilize high-speed camera 11 and scale 10 to catch steel ball by the movement velocity after clashing into; The device that this method is used is as shown in Figure 2, and this device comprises firing pin 2, striker spring 3, stirs son 8, breechblock assembling 9, scale 10, high-speed camera 11, steel ball 12 and pedestal 13;

Concrete steps are following:

1) utilizes the quality and the record of balance measurement firing pin 2, striker spring 3, steel ball 12;

2) will be in the breechblock assembling 9 of waiting the state of pulling the trigger and be placed on the platform, the breechblock minute surface up and level; Steel ball 12 is positioned on the pedestal 13, identical during firing pin percussion primer under movement travel and the firing lock nominal situation when pedestal 13 guarantees firing pins 2 bump steel balls 12;

3) scale 10 is placed on breechblock assembles on 9 minute surfaces and it is vertical with minute surface to keep, 0 and steel ball central horizontal; High-speed camera 11 aligns scale 10 and takes;

4) artificial percussion, firing pin 2 be at the striker spring 3 effects bump steel ball 12 that travels forward down, ejects fast after steel ball 12 is clashed into and move upward, and steel ball 12 motion processes are by high-speed camera 11 records;

5) steel ball 12 motion processes with high-speed camera 11 record import computer, through playback at a slow speed, get the average velocity in the 100mm after steel ball 12 take-offs, as steel ball 12 by the speed after hitting; The quality of the firing pin 2 that joint step 1 obtains, striker spring 3, steel ball 12 can calculate the movement velocity of trying to achieve when bump firing pin 2 by formula (1-4) .

The quality of M---firing pin 2,

V ₁---the speed of firing pin 2 during bump,

V ₂---the speed of bump back firing pin 2,

The quality of m---steel ball 12,

v ₁---the speed of steel ball 12 before being impacted, static v before being impacted ₁=0,

v ₂---clashed into the speed of back steel ball 12.

Though in conjunction with accompanying drawing embodiment of the present invention has been described, to those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also make some improvement, these also should be regarded as belonging to protection scope of the present invention.

Claims (1)

1. the method for firing pin velocity test when a mechanical type firing lock is pulled the trigger; The device of implementing this method comprises firing pin (2), striker spring (3), stirs son (8), breechblock assembling (9), scale (10), high-speed camera (11), steel ball (12) and pedestal (13), it is characterized in that:

1) utilizes the quality and the record of balance measurement firing pin (2), striker spring (3), steel ball (12);

2) will be in the breechblock assembling (9) of waiting the state of pulling the trigger and be placed on the platform, the breechblock minute surface up and level; Steel ball (12) is positioned on the pedestal (13), identical during firing pin percussion primer under movement travel and the firing lock nominal situation when pedestal (13) guarantees firing pin (2) bump steel ball (12);

3) be placed on scale (10) on breechblock assembling (9) minute surface and keep vertical, 0 and steel ball (12) central horizontal with minute surface; High-speed camera (11) aligns scale (10) and takes;

4) artificial percussion, firing pin (2) be at striker spring (3) the effect bump steel ball (12) that travels forward down, ejects fast after steel ball (12) quilt is clashed into and move upward, and steel ball (12) motion process is by high-speed camera (11) record;

5) steel ball (12) motion process with high-speed camera (11) record imports computer, through playback at a slow speed, gets the average velocity in the 100mm after steel ball (12) take-off, as steel ball (12) by the speed after hitting; The quality of the firing pin that joint step 1 obtains (2), striker spring (3), steel ball (12), the movement velocity of firing pin (2) when trying to achieve bump by formula

calculating;

Wherein, the quality of M---firing pin (2),

V ₁---the speed of firing pin during bump (2),

The quality of m---steel ball (12),

v ₂---clashed into the speed of back steel ball (12).

Images