阅读说明：本技术 一种小口径膛线拉槽装置 (Small-bore rifling groove broaching device ) 是由 乔斌 雷艳 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种小口径膛线拉槽装置,包括：底座、推进机构、推杆、限位架和缓冲部件,所述推进机构装配在底座的顶端右侧,所述推杆装配在推进机构的左侧,所述限位架固定安装在底座的顶端,且顶端套接在底座的外壁,所述缓冲部件安装在底座的顶端左侧,还包括：旋转机构,装配在所述推杆的左端；切削机构,装配在所述旋转机构的左端；转动机构,装配在所述旋转机构的外侧。该小口径膛线拉槽装置,在实际使用中,能够保证刀身带动刀片在枪管内腔切削出若干条等距的螺旋状膛线,同时能够根据不同的需求更换刀片,以保证不同的生产需求,还能够将不同尺寸的枪管进行固定并锁紧,满足了不同型号的枪管生产需求,提高了设备的通用性。(The invention discloses a small-bore rifling grooving device, which comprises: base, advancing mechanism, push rod, spacing and buffering part, advancing mechanism assembles on the top right side of base, the push rod assembles in advancing mechanism's left side, spacing fixed mounting is on the top of base, and the top cup joints the outer wall at the base, buffering part installs in the top left side of base, still includes: the rotating mechanism is assembled at the left end of the push rod; the cutting mechanism is assembled at the left end of the rotating mechanism; and the rotating mechanism is assembled on the outer side of the rotating mechanism. This small-bore rifling trompil device in-service use, can guarantee that the blade drives the blade and cuts out the heliciform rifling of a plurality of equidistance in the barrel inner chamber, can change the blade according to the demand of difference simultaneously to guarantee different production demands, can also fix and lock not unidimensional barrel, satisfied the barrel production demand of different models, improved the commonality of equipment.)

1. A small bore rifling channeling apparatus, comprising: base (1), advancing mechanism (2), push rod (3), spacing (4) and buffer unit (9), advancing mechanism (2) assemble on the top right side of base (1), push rod (3) assemble in the left side of advancing mechanism (2), spacing (4) fixed mounting is on the top of base (1), and the top cup joints at the outer wall of base (1), the top left side at base (1) is installed in buffer unit (9), its characterized in that still includes:

a rotating mechanism (5) assembled at the left end of the push rod (3);

a cutting mechanism (6) assembled at the left end of the rotating mechanism (5);

a rotating mechanism (7) assembled outside the rotating mechanism (5);

the locking mechanism (8) is assembled at the left end of the rotating mechanism (7);

the rotating mechanism (5) comprises:

a second bracket (51) mounted on the rear side of the top end of the base (1);

a slide way (52) which is arranged on the outer wall of the second bracket (51);

the rack (53) is embedded in the inner cavity of the push rod (3) in a vertically sliding manner;

one end of the second limiting rod (54) is fixedly arranged at the top end of the rear side of the second limiting rod (54), and the other end of the second limiting rod penetrates through the inner cavity of the slide way (52);

and the gear (55) is mounted on the left side of the push rod (3) through a bearing and is meshed with the rack (53), and when the push rod (3) drives the rack (53) and the gear (55) to move leftwards, the second limiting rod (54) is enabled to move downwards by utilizing the limiting effect of the slide rail (52) on the second limiting rod (54), so that the gear (55) rotates.

2. A small-bore rifling groove broaching device according to claim 1, characterized in that: the slide way (52) is obliquely arranged from left to right.

3. A small-bore rifling groove broaching device according to claim 1, characterized in that: the propulsion mechanism (2) comprises:

the first bracket (21) is arranged on the right side of the top end of the base (1);

a first motor (22) installed at a right side of the first bracket (21);

one end of the rotating roller (23) is locked at the output end of the first motor (22) through a coupler, and the other end of the rotating roller is installed on the left side of the inner wall of the first support (21) through a bearing;

the sliding chute (24) is communicated end to end and arranged on the outer wall of the rotating roller (23);

first gag lever post (25), one end slidable embedded in the inner chamber of spout (24), and other end fixed mounting utilize first motor (22) drive to change roller (23) rotatory in the bottom right side of push rod (3), through the limiting displacement of spout (24) to first gag lever post (25), make push rod (3) control reciprocating motion.

4. A small-bore rifling groove broaching device according to claim 1, characterized in that: the cutting mechanism (6) comprises:

a blade (61) fixedly mounted on the left side of the gear (55);

one end of the blade (62) is embedded in the inner cavity of the blade body (61), and the other end of the blade extends out of the top end of the blade body (61);

the number of the limiting columns (63) is two, one ends of the limiting columns are respectively and symmetrically arranged on the rear side of the inner cavity of the cutter body (61), and the other ends of the limiting columns penetrate through and extend out of the outer wall of the cutter blade (62);

a housing (64) mounted on a front side of the blade body (61);

the number of the through holes (65) is two, the through holes are symmetrically formed in the outer wall of the shell (64), and the outer walls of the two limiting columns (63) are embedded into the inner cavities of the two through holes (65) respectively.

5. A small-bore rifling groove broaching device according to claim 1, characterized in that: the rotating mechanism (7) includes:

the third bracket (71) is fixedly arranged at the top end of the base (1);

the second motor (72) is installed at the top end of the left side of the third bracket (71);

the first rotating rod (73) is assembled on the right side of the third bracket (71), and one end of the first rotating rod is locked at the output end of the second motor (72) through a coupler;

one end of the second rotating rod (74) is arranged at the other end of the first rotating rod (73) through a pin shaft;

the shifting rod (75) is arranged on the right side of the third support (71) through a pin shaft, and one end of the shifting rod is arranged on the other end of the second rotating rod (74) through a pin shaft;

the ratchet wheel (76) is mounted on the right side of the third support (71) through a bearing, the outer wall of the knife body (61) penetrates through a through hole in the middle of the ratchet wheel (76) and extends out of the left side of the third support (71), the first rotating rod (73) is driven to rotate through the second motor (72), and the ratchet wheel (76) is driven to rotate intermittently and irreversibly by the other end of the shifting rod (75) through the matching of the second rotating rod (74) and the shifting rod (75).

6. A small-bore rifling groove broaching device according to claim 1, characterized in that: the locking mechanism (8) comprises:

a protective case (81) fixedly mounted on the left side of the ratchet (76);

the clamping assembly is assembled in the inner cavity of the protective shell (81);

and the limiting component is assembled on the right side of the clamping component.

7. A small-bore rifling groove broaching device according to claim 6, characterized in that: the clamping assembly comprises:

the number of the first limiting grooves (82) is a plurality, and the first limiting grooves are respectively arranged in the inner cavity of the protective shell (81) at equal intervals;

one end of the push block (83) is slidably embedded in the inner cavity of the first limit groove (82);

the clamping block (84) is fixedly arranged at the other end of the first limiting groove (82);

and one end of the limiting block (85) is fixedly arranged on the right side of the push block (83).

8. A small-bore rifling groove broaching device according to claim 6, characterized in that: the spacing subassembly includes:

the rotating disc (86) is rotatably assembled at the right side of the inner cavity of the protective shell (81);

the number of the second limiting grooves (87) is a plurality, the second limiting grooves are respectively arranged on the circumference of the rotary disc (86) at equal intervals, and the outer wall of each limiting block (85) is slidably embedded in the inner cavity of each second limiting groove (87);

a tooth block (88) mounted on the top end of the turntable (86);

a fixed shell (89) mounted on the top end of the protective shell (81);

screw rod (810), one end pass through the bearing install in the inner chamber rear side of set casing (89), and the other end extends the outer wall of set casing (89), screw rod (810) with tooth piece (88) intermeshing, rotatory messenger tooth piece (88) of screw rod (810) can drive carousel (86) rotatory to utilize second spacing groove (87) to spacing to stopper (85), make ejector pad (83) and clamp splice (84) inwards move simultaneously.

Technical Field

The invention relates to the technical field of machining equipment, in particular to a small-bore rifling groove broaching device.

Background

The rifling, also called rifling, because its cross-sectional shape is similar to the windmill, also called windmill line, the rifling can be said to be the soul of the gun barrel, the function of the rifling lies in giving the bullet the ability to rotate, make the bullet still can keep the established direction after going out of the bore, the rifling draws the groove to be an important step in the rifling making;

the grooving tool at the present stage does not have a grooving tool specially directed at small-bore rifling, and current cutting blade and advancing device design as an organic whole usually, the cutting blade of different models can't be changed according to the barrel bore, and also can't adjust equipment according to the rifling degree of depth of needs, consequently the commonality to different bore rifling is lower, moreover, current equipment is in order to guarantee the stability of centre gripping barrel, clamping part only is applicable to the barrel of a medium-bore, can't adjust to the barrel of different bores, based on the problem, a small-bore rifling grooving device has now been proposed.

Disclosure of Invention

The invention aims to provide a groove broaching device for small-caliber rifles, which at least solves the problems that in the prior art, grooves can not be broached for rifles with different calibers, cutting tools with different types can not be replaced quickly, and gun barrels with different calibers can not be clamped.

In order to achieve the purpose, the invention provides the following technical scheme: a small bore rifling channeling apparatus, comprising: base, advancing mechanism, push rod, spacing and buffering part, advancing mechanism assembles on the top right side of base, the push rod assembles in advancing mechanism's left side, spacing fixed mounting is on the top of base, and the top cup joints the outer wall at the base, buffering part installs in the top left side of base, still includes:

the rotating mechanism is assembled at the left end of the push rod;

the cutting mechanism is assembled at the left end of the rotating mechanism;

a rotating mechanism assembled at the outer side of the rotating mechanism;

the locking mechanism is assembled at the left end of the rotating mechanism;

the rotating mechanism includes:

the second bracket is arranged on the rear side of the top end of the base;

the slideway is arranged on the outer wall of the second bracket;

the rack can be embedded in the inner cavity of the push rod in a vertically sliding manner;

one end of the second limiting rod is fixedly arranged at the top end of the rear side of the second limiting rod, and the other side of the second limiting rod penetrates through the inner cavity of the slide way;

the gear is installed in the left side of the push rod through the bearing, and is meshed with the rack, when the push rod drives the rack and the gear to move leftwards, the second limiting rod is made to move downwards by utilizing the limiting effect of the slide way on the second limiting rod, and therefore the gear is made to rotate.

Preferably, the slide way is obliquely arranged from left to right upwards.

Preferably, the propulsion mechanism comprises: the first bracket is arranged on the right side of the top end of the base; the first motor is arranged on the right side of the first bracket; one end of the rotating roller is locked at the output end of the first motor through a coupler, and the other end of the rotating roller is installed on the left side of the inner wall of the first support through a bearing; the sliding chute is communicated end to end and arranged on the outer wall of the rotary roller; first gag lever post, one end slidable embedded in the inner chamber of spout, and other end fixed mounting utilize first motor drive to change the roller rotatory in the bottom right side of push rod, through the limiting displacement of spout to first gag lever post, make push rod left and right sides reciprocating motion.

Preferably, the cutting mechanism includes: the cutter body is fixedly arranged on the left side of the gear; one end of the blade is embedded in the inner cavity of the knife body, and the other end of the blade extends out of the top end of the knife body; the number of the limiting columns is two, one ends of the limiting columns are respectively and symmetrically arranged on the rear side of the inner cavity of the cutter body, and the other ends of the limiting columns penetrate through and extend out of the outer wall of the blade; a housing mounted on a front side of the blade body; the number of the through holes is two, the through holes are symmetrically formed in the outer wall of the shell respectively, and the outer walls of the limiting columns are embedded in the inner cavities of the two through holes respectively.

Preferably, the rotating mechanism includes: the third bracket is fixedly arranged at the top end of the base; the second motor is arranged at the top end of the left side of the third bracket; the first rotating rod is assembled on the right side of the third support, and one end of the first rotating rod is locked to the output end of the second motor through a coupler; one end of the second rotating rod is arranged at the other end of the first rotating rod through a pin shaft; the deflector rod is arranged on the right side of the third support through a pin shaft, and one end of the deflector rod is arranged on the other end of the second rotating rod through a pin shaft; the ratchet wheel is arranged on the right side of the third support through a bearing, the outer wall of the knife body penetrates through a through hole in the middle of the ratchet wheel and extends out of the left side of the third support, the first rotating rod is driven to rotate through the second motor, and the ratchet wheel is driven by the other end of the shifting rod to rotate intermittently and irreversibly by the aid of the cooperation of the second rotating rod and the shifting rod.

Preferably, the locking mechanism comprises: the protective shell is fixedly arranged on the left side of the ratchet wheel; the clamping assembly is assembled in the inner cavity of the protective shell; and the limiting component is assembled on the right side of the clamping component.

Preferably, the clamping assembly comprises: the first limiting grooves are arranged in the inner cavity of the protective shell at equal intervals; one end of the push block is slidably embedded in the inner cavity of the first limiting groove; the clamping block is fixedly arranged at the other end of the first limiting groove; and one end of the limiting block is fixedly arranged on the right side of the push block.

Preferably, the limiting assembly comprises: the rotary table is rotatably assembled on the right side of the inner cavity of the protective shell; the number of the second limiting grooves is a plurality, the second limiting grooves are respectively arranged on the circumference of the rotary table at equal intervals, and the outer wall of the limiting block is slidably embedded in the inner cavity of the second limiting groove; the gear block is arranged at the top end of the rotary table; the fixed shell is arranged at the top end of the protective shell; the screw rod, one end pass through the bearing install in the inner chamber rear side of set casing, and the other end extends the outer wall of set casing, the screw rod with tooth piece intermeshing makes the tooth piece can drive the carousel rotatory when the screw rod is rotatory to utilize the spacing of second spacing groove to the stopper, make ejector pad and clamp splice inwards move simultaneously.

The small-bore rifling groove broaching device provided by the invention has the beneficial effects that:

1. according to the invention, the screw rod is rotated to drive the turntable to rotate, so that the pushing block pushes the clamping block to move inwards by utilizing the limiting effect of the second limiting groove on the limiting block, the available inner wall of the through hole at the inner side of the locking mechanism is reduced, and gun barrels with different diameters can be clamped in practical use, so that rifling groove drawing is conveniently carried out on different gun barrels, and the universality of the equipment is improved;

2. according to the invention, the shell can be opened by rotating the screw screwed tightly in the inner cavity of the limiting column, so that the blade is separated from a limited state, and the blade can be taken out forwards;

3. according to the invention, the pushing mechanism drives the pushing rod to reciprocate, the rack moves up and down while moving left and right along with the pushing rod by utilizing the limiting effect of the slide way on the second limiting rod, so that the driving gear drives the cutting mechanism to rotate, the first rotating rod is driven to rotate by the second motor, the ratchet wheel rotates intermittently by utilizing the matching of the second rotating rod and the shifting rod, and the locking mechanism is driven to rotate intermittently.

Drawings

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

FIG. 2 is an enlarged view of the invention at A;

FIG. 3 is a schematic view of the cutting mechanism of the present invention;

FIG. 4 is a right side view of the rotating mechanism of the present invention;

FIG. 5 is a right side schematic view of the locking mechanism of the present invention;

fig. 6 is a right side sectional view of the locking mechanism of the present invention.

In the figure: 1. the device comprises a base, 2, a propelling mechanism, 21, a first support, 22, a first motor, 23, a rotating roller, 24, a sliding groove, 25, a first limiting rod, 3, a push rod, 4, a limiting frame, 5, a rotating mechanism, 51, a second support, 52, a sliding way, 53, a rack, 54, a second limiting rod, 55, a gear, 6, a cutting mechanism, 61, a knife body, 62, a blade, 63, a limiting column, 64, a shell, 65, a through hole, 7, a rotating mechanism, 71, a third support, 72, a second motor, 73, a first rotating rod, 74, a second rotating rod, 75, a driving rod, 76, a ratchet wheel, 8, a locking mechanism, 81, a protective shell, 82, a first limiting groove, 83, a push block, 84, a clamping block, 85, a limiting block, 86, a rotary disk, 87, a second limiting groove, 88, a toothed block, 89, a fixed shell, 810, a screw rod, 9 and a buffering component.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a small-bore rifling grooving device comprises a base 1, a propelling mechanism 2, a push rod 3, a limiting frame 4 and a buffer part 9, wherein the propelling mechanism 2 is assembled on the right side of the top end of the base 1, the push rod 3 is assembled on the left side of the propelling mechanism 2, the propelling mechanism 2 can push the push rod 3 to reciprocate left and right, the limiting frame 4 is fixedly installed at the top end of the base 1, the top end of the limiting frame is sleeved on the outer wall of the base 1, the buffer part 9 is installed on the left side of the top end of the base 1, the small-bore rifling grooving device further comprises a rotating mechanism 5, a cutting mechanism 6, a rotating mechanism 7 and a locking mechanism 8, the rotating mechanism 5 is assembled at the left end of the push rod 3, the cutting mechanism 6 is assembled at the left end of the rotating mechanism 5, the rotating mechanism 7 is assembled at the outer side of the rotating mechanism 5, and the locking mechanism 8 is assembled at the left end of the rotating mechanism 7;

the rotating mechanism 5 comprises a second support 51, a slide way 52, a rack 53, a second limiting rod 54 and a gear 55, wherein the second support 51 is installed on the rear side of the top end of the base 1, the slide way 52 is arranged on the outer wall of the second support 51, the rack 53 is embedded in the inner cavity of the push rod 3 in a vertically sliding manner, one end of the second limiting rod 54 is fixedly installed on the top end of the rear side of the second limiting rod 54, the other end of the second limiting rod penetrates through the inner cavity of the slide way 52, the gear 55 is installed on the left side of the push rod 3 through a bearing and is meshed with the rack 53, and when the push rod 3 drives the rack 53 and the gear 55 to move leftwards, the second limiting rod 54 is enabled to move downwards through the limiting effect of the slide way 52 on the second limiting rod 54, so that the gear 55 rotates.

Preferably, the slide rail 52 is inclined upward from left to right, so as to ensure that the rack 53 moves downward while moving leftward, and vice versa.

As a preferred scheme, furthermore, the propulsion mechanism 2 includes a first support 21, a first motor 22, a rotating roller 23, a sliding groove 24, and a first limit rod 25, the first support 21 is installed on the right side of the top end of the base 1, the first motor 22 is installed on the right side of the first support 21, one end of the rotating roller 23 is locked at the output end of the first motor 22 through a coupling, it is ensured that the first motor 22 can drive the rotating roller 23 to rotate, the other end of the rotating roller is installed on the left side of the inner wall of the first support 21 through a bearing, the sliding groove 24 is opened on the outer wall of the rotating roller 23 in a head-to-tail communication manner, one end of the first limit rod 25 is slidably embedded in the inner cavity of the sliding groove 24, the other end of the first limit rod is fixedly installed on the right side of the bottom end of the push rod 3, the rotating roller 23 is driven to rotate by the first motor 22, and the push rod 3 is enabled to reciprocate left and right through the limit action of the sliding groove 24 on the first limit rod 25.

As a preferred scheme, further, the cutting mechanism 6 includes a blade 61, a blade 62, two limiting posts 63, a housing 64, and two through holes 65, the blade 61 is fixedly mounted on the left side of the gear 55, one end of the blade 62 is embedded in the inner cavity of the blade 61, and the other end extends out of the top end of the blade 61, the number of the limiting posts 63 is two, one end is symmetrically mounted on the rear side of the inner cavity of the blade 61, and the other end penetrates through and extends out of the outer wall of the blade 62, the blade 62 is limited by the limiting posts 63, so as to ensure the position of the blade 62 to be fixed, the housing 64 is mounted on the front side of the blade 61, the number of the through holes 65 is two, the through holes 65 are symmetrically mounted on the outer wall of the housing 64, and the outer walls of the two limiting posts 63 are embedded in the inner cavities of the two through holes 65, so as to prevent the blade from falling off forward by the cooperation of the housing 64 and the limiting posts 63.

Preferably, the rotating mechanism 7 further includes a third bracket 71, a second motor 72, a first rotating rod 73, a second rotating rod 74, a shifting rod 75, and a ratchet wheel 76, the third bracket 71 is fixedly mounted at the top end of the base 1, the second motor 72 is mounted at the top end of the left side of the third bracket 71, the first rotating rod 73 is mounted at the right side of the third bracket 71, and one end of the first rotating rod is locked to the output end of the second motor 72 through a coupling, so as to ensure that the second motor 72 can drive the first rotating rod 73 to rotate clockwise, one end of the second rotating rod 74 is mounted at the other end of the first rotating rod 73 through a pin shaft, the shifting rod 75 is mounted at the right side of the third bracket 71 through a pin shaft, and one end of the second rotating rod 74 is mounted at the other end of the second rotating rod 74 through a pin shaft, the ratchet wheel 76 is mounted at the right side of the third bracket 71 through a bearing, the outer wall of the knife body 61 penetrates through a central through hole of the ratchet wheel 76 and extends out of the left side of the third bracket 71, the first rotating rod 73 is driven to rotate by the second motor 72, and the ratchet wheel 76 is driven to rotate intermittently and irreversibly by the other end of the shift lever 75 by the cooperation of the second rotating rod 74 and the shift lever 75.

As a preferable scheme, further, the locking mechanism 8 includes a protective housing 81, a first limiting groove 82, a push block 83, a clamping block 84, a limiting block 85, a rotary table 86, a second limiting groove 87, a tooth block 88, a fixed housing 89, and a screw 810, the protective housing 81 is fixedly mounted on the left side of the ratchet 76, the number of the first limiting grooves 82 is several, the first limiting grooves 82 are respectively equidistantly arranged in the inner cavity of the protective housing 81, one end of the push block 83 is slidably embedded in the inner cavity of the first limiting groove 82, the clamping block 84 is fixedly mounted on the other end of the first limiting groove 82, one end of the limiting block 85 is fixedly mounted on the right side of the push block 83, the rotary table 86 is rotatably assembled on the right side of the inner cavity of the protective housing 81, the number of the second limiting grooves 87 is several, the second limiting grooves are respectively equidistantly arranged on the circumference of the rotary table 86, and the outer wall of the limiting block 85 is slidably embedded in the inner cavity of the second limiting groove 87, when the rotary table 86 rotates, the push block 83 and the clamping block 84 move together, the tooth block 88 is mounted at the top end of the rotary disc 86, the fixed shell 89 is mounted at the top end of the protective shell 81, one end of the screw 810 is mounted at the rear side of the inner cavity of the fixed shell 89 through a bearing, the other end of the screw extends out of the outer wall of the fixed shell 89, the screw 810 is meshed with the tooth block 88, and when the screw 810 rotates, the tooth block 88 can drive the rotary disc 86 to rotate, so that the push block 83 and the clamping block 84 move inwards at the same time.

The detailed connection means is a technique known in the art, and the following mainly describes the working principle and process, and the specific operation is as follows.

The method comprises the following steps: before use, the gun barrel is clamped and fixed, the left end of the gun barrel extends into a through hole in the middle of the protective shell 81, the outer wall of the cutter body 61 sequentially penetrates through the ratchet 76, the third support 71, the protective shell 81 and the inner cavity of the gun barrel from right to left, the screw 810 is rotated, the screw 810 is meshed with the tooth block 88, the rotary disc 86 is driven to rotate together by the rotation of the screw 810, the limiting function of the second limiting groove 87 on the limiting block 85 is utilized, when the rotary disc 86 rotates, the plurality of limiting blocks 85 drive the push block 83 and the clamping block 84 to contract inwards, and the gun barrel embedded in the protective shell 81 and communicated with the inner side is clamped tightly, so that subsequent operation is facilitated;

step two: taking down the screw tightly screwed in the inner cavity of the limit column 63, taking out the shell 64 forwards, putting the blade 62 adapted to the current barrel into the inner cavity of the cutter body 61 from front to back, ensuring that the through hole of the blade 62 is sleeved on the outer wall of the limit column 63, putting the shell 64 backwards, ensuring that the through hole 65 is sleeved on the outer wall of the limit column 63, screwing the screw into the inner cavity of the limit column 63 again, fixing the shell 64 and fixing the blade 62 at the same time;

step three: the first motor 22 and the third bracket 71 are started, the first motor 22 drives the roller 23 to rotate, the first limiting rod 25 is driven to reciprocate left and right by utilizing the limiting effect of the chute 24 on the first limiting rod 25, thereby enabling the push rod 3 and the knife body 61 to reciprocate left and right, utilizing the limiting function of the slide way 52 on the second limiting rod 54, when the rack 53 and the second limiting rod 54 move rightwards, the rack 53 moves downwards at the same time, otherwise, the rack moves upwards, so that the rack 53 and the cutter body 61 are driven to rotate, further, the cutter body 61 is moved leftward to cut and simultaneously rotates to ensure that the cutting path is spiral, at the same time, the second motor 72 is used to drive the first rotating rod 73 to rotate, and by means of the cooperation between the second rotating rod 74 and the shifting lever 75, when the first rotating rod 73 rotates for one circle, the shift lever 75 will shift the ratchet 76 to rotate for a fixed angle, thereby ensuring that the ratchet 76 rotates the barrel a fixed angle each time the blade 61 makes a reciprocal cut;

in the in-service use, can guarantee that blade 61 drives blade 62 and cuts out the heliciform rifling of a plurality of equidistance in the barrel inner chamber, can change blade 62 simultaneously according to the demand of difference to guarantee different production demands, can also fix and lock the barrel of equidimension, satisfied the barrel production demand of different models, improved the commonality of equipment.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.