A honing bar for honing a rifling groove

Abstract

The present application relates to a kind of honing bar for honing borehole groove, belong to borehole honing technical field;Including honing head, honing head includes body, the push rod groove inside the rear end of body is provided with push rod seat, push rod seat is provided with tool withdrawal spring with the bottom surface of push rod groove inside;Six rotating grooves are uniformly provided on the outer side of body, the bottom surface of rotating groove is provided with lifting groove, lifting groove rear end is communicated with push rod groove, the inside of lifting groove is provided with push piece, push piece outside is sequentially provided with lifting oil stone seat, rotating oil stone seat, rotating in the rotating groove inside rotating oil stone seat, push piece and lifting oil stone seat are contacted by slope, the rear end of each push piece is connected with push rod seat by push rod, six rotating oil stone seats are connected by an annular locking spring;The front end of front push rod is inserted into the push rod groove inside body and with the rear end surface of push rod seat contact;Solved the current method of honing borehole inner wall Efficiency is lower, consumption is larger, the problem of higher artificial cost.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rifling honing, and particularly relates to a honing rod for honing a rifling groove. BACKGROUND

[0002] Rifling, also known as rifling line, refers to a plurality of spiral protrusions and grooves on the guiding part of the barrel wall at a certain inclination angle with the barrel axis. Its function is to impart a certain rotational speed to the projectile when it exits the muzzle, so as to ensure the stability of the projectile in flight.

[0003] Generally, the barrel is about 1-4 meters long, and there are 24 spiral grooves inside the barrel. The angle of the rifling in the barrel varies from 0 degrees to 6.5 degrees gradually. The inner wall of the barrel is called "male line", and the inner wall of the rifling is called "female line". The roughness of the inner wall of the female line is very important for aerodynamics.

[0004] The existing method for honing the inner wall of the rifling is that workers use a long wooden stick with a single tooling oil stone mounted on the front of the wooden stick. The construction is manually pulled. The disadvantages are as follows: the efficiency is extremely low, only one rifling can be ground at a time, and it takes one day for a worker to grind one rifling, and it takes 24 days to grind 24 riflings; the tooling oil stone is consumed quickly, and a new oil stone needs to be replaced every ten minutes or so; the labor cost is high, the time cost is high; the processing precision is low and consistency cannot be guaranteed. SUMMARY

[0005] The present application overcomes the shortcomings of the prior art and provides a honing rod for honing a rifling groove, which solves the problems of low efficiency, high consumption and high labor cost in the current method of honing the inner wall of the rifling.

[0006] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme.

[0007] A honing rod for honing a rifling groove, comprising a honing head, the honing head comprising a cylindrical body structure, a push rod groove is provided at the rear end of the body, a push rod seat is provided inside the push rod groove, a tool withdrawal spring is provided between the push rod seat and the inner bottom surface of the push rod groove; six rotating grooves are uniformly provided on the outer side of the body along the circumference, a lifting groove is provided at the inner bottom surface of the rotating groove, the rear end of the lifting groove is communicated with the push rod groove, a push piece is provided inside the lifting groove, a lifting oil stone seat is provided on the outer side of the push piece, a rotating oil stone seat is provided on the outer side of the lifting oil stone seat, the rotating oil stone seat rotates inside the rotating groove, the push piece and the lifting oil stone seat are in contact through an inclined surface, the rear end of each push piece is connected with the push rod seat through a push rod, and the six rotating oil stone seats are connected through an annular locking spring; the front end of the front push rod extends into the push rod groove of the body and is in contact with the rear end surface of the push rod seat.

[0008] Further, the length direction of the rotating groove and the lifting groove is parallel to the axis direction of the body; the rotating groove comprises a square front section, a circular middle section and a square rear section, the width of the rear section is smaller than the inner diameter of the middle section, and the width of the front section is larger than the inner diameter of the middle section; the width of the lifting groove is equal to the width of the rear section of the rotating groove, and the middle section of the rotating groove extends inwardly to the middle height of the lifting groove.

[0009] Further, the two side surfaces of the push piece are in contact with the two side inner walls of the lifting oil stone seat; the outer surface of the push piece is an inner inclined surface, the distance between the rear end of the inner inclined surface of the push piece and the axis of the body is smaller than the distance between the front end of the inner inclined surface and the axis of the body; the inner surface of the lifting oil stone seat is an outer inclined surface, the distance between the rear end of the outer inclined surface and the axis of the body is larger than the distance between the front end of the outer inclined surface and the axis of the body; the inner inclined surface of the push piece is tightly fitted with the outer inclined surface of the lifting oil stone seat.

[0010] Further, the middle part of the lifting oil stone seat is a first cylindrical section, and the front and rear sides of the lifting oil stone seat are first square sections, wherein the outer surface of the first cylindrical section is in contact with the inner wall of the middle section of the rotating groove extending to the inner part of the lifting groove, and the two side surfaces of the first square sections are in contact with the two side inner walls of the lifting groove; the middle part of the rotating oil stone seat is a second cylindrical section, and the front and rear sides of the rotating oil stone seat are second square sections, wherein the outer surface of the second cylindrical section is in contact with the inner wall of the middle section of the rotating groove, and the widths of the second square sections are smaller than the widths of the front section and the rear section of the rotating groove.

[0011] Further, the outer surface of the lifting oil stone seat is provided with a square groove; the outer surface of the rotating oil stone seat is fixedly provided with a honing tool body, and a semi-cylindrical inner boss is fixedly arranged on the inner surface of the rotating oil stone seat, the inner boss is located in the square groove of the lifting oil stone seat, and a through connection hole is arranged at the axis of the inner boss; an outer annular groove is arranged on the outer surface of the body, and an annular locking spring is arranged in the outer annular groove, the locking spring passes through the connection holes of the six rotating oil stone seats, and the elastic force of the locking spring on the six rotating oil stone seats is along the radial direction of the body towards the axis of the body.

[0012] Further, a anti-falling groove is arranged at the rear end surface of each push piece, and a anti-falling ring is fixedly arranged at the front end of the push rod, the front end of the push rod is inserted into the anti-falling groove of the push piece and can slide in the anti-falling groove; the rear end of each push rod is fixedly connected with the push rod seat, and an advancing spring is sleeved on the outer side of each push rod, and the two ends of the advancing spring are in contact with the push piece and the push rod seat respectively.

[0013] Further, the connecting outer rod is provided with a connecting inner rod inside.

[0014] Further, the connecting outer rod is provided with a connecting mechanism at the rear end, the connecting mechanism comprising a connecting head, a bearing box, and a tail seat connecting pipe. The bearing box comprises a small-diameter section at the front side and a large-diameter section at the rear side. An end cover is arranged at the opening at the rear side of the large-diameter section. The front end of the tail seat connecting pipe extends into the inside of the large-diameter section through the end cover. The tail seat connecting pipe is connected to the large-diameter section through a bearing. The rear end of the tail seat connecting pipe is provided with the connecting head. A sliding cylinder is fixed at the opening at the front end of the tail seat connecting pipe. A sliding rod is slidably connected inside the sliding cylinder. The front end of the sliding rod is located inside the small-diameter section of the bearing box. A long circular groove is arranged on the sliding rod along the radial direction of the sliding rod. A key groove is correspondingly arranged on the side wall of the small-diameter section of the bearing box. A key is fixedly arranged inside the key groove. The key passes through the long circular groove on the sliding rod.

[0015] Further, a manual advancing mechanism is arranged outside the small-diameter section of the bearing box. The manual advancing mechanism comprises a feeding ring and a locking ring. Both the feeding ring and the locking ring are circular ring structures and are screwed to the outside of the small-diameter section of the bearing box. An inner side annular groove is arranged on the inner side surface of the feeding ring. A feeding pin is arranged inside the inner side annular groove along the radial direction of the feeding ring. A long circular hole is arranged on the side wall of the small-diameter section of the bearing box. The length direction of the long circular hole is parallel to the axis of the bearing box. The outer side end of the feeding pin is located inside the inner side annular groove of the feeding ring. The inner side end of the feeding pin passes through the long circular hole and is fixedly connected to the sliding rod. The locking ring is located at the front side of the feeding ring.

[0016] Further, the front end of the small-diameter section of the bearing box is fixedly connected to the rear end of the connecting outer rod. The rear end of the connecting inner rod extends into the inside of the small-diameter section of the bearing box and is fixedly connected to the front end of the sliding rod.

[0017] The beneficial effects of the present application relative to the prior art are as follows:

[0018] The present application provides a honing rod for honing a rifling groove. The combined oil stone seat can simultaneously complete radial lifting and circumferential swinging actions, thereby realizing automatic honing of the rifling. The connecting part of the push piece and the push rod adopts a feeding spring, which replaces the traditional hard connection and greatly reduces the probability of defective products. The rifling is honed by a honing machine, which greatly improves the honing efficiency and reduces the labor cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described in detail below with reference to the accompanying drawings:

[0020] Figure 1 is a perspective view of the entire application;

[0021] Figure 2 is a side view of the entire application;

[0022] Figure 3 is a front view of the entire application;

[0023] Figure 4 is a cross-sectional view of A-A in Figure 3 ;

[0024] Figure 5 is a partial enlarged view of C in Figure 4 ;

[0025] Figure 6 is a partial enlarged view of D in Figure 4 ;

[0026] Figure 7 is a perspective view of the body;

[0027] Figure 8 is a side view of the body;

[0028] Figure 9 is a cross-sectional view of B-B in Figure 8 ;

[0029] Figure 10 is a perspective view of the honing head Figure 1 ;

[0030] Figure 11 is a perspective view of the honing head Figure 2 ;

[0031] Figure 12 is an exploded view of the honing head Figure 1 ;

[0032] Figure 13 is an exploded view of the honing head Figure 2 ;

[0033] Figure 14 is a perspective view of the honing assembly;

[0034] Figure 15 is a relative structural view of the honing assembly and the body after half-sectioning;

[0035] Figure 16 is a relative structural view of the partial components of the honing assembly and the body after half-sectioning;

[0036] Figure 17 is a structural view of the rotary oilstone seat;

[0037] Figure 18This is a schematic diagram of the lifting oilstone base;

[0038] Figure 19 This is a schematic diagram of the structure of the rotating oilstone base after rotation;

[0039] Among them, 1 is the honing head, 2 is the connecting outer rod, 3 is the connecting mechanism, 4 is the manual push mechanism, 5 is the body, 6 is the push rod groove, 7 is the rotating groove, 8 is the front section, 9 is the middle section, 10 is the rear section, 11 is the lifting groove, 12 is the front docking block, 13 is the outer annular groove, 14 is the push plate, 15 is the lifting oilstone seat, 16 is the rotating oilstone seat, 17 is the honing tool body, 18 is the locking spring, 19 is the push rod seat, 20 is the front push rod, 21 is the retraction spring, 22 is the push rod, 23 is the feed spring, 24 is the rear nylon ring, and 25 is... 26 is the front nylon sheath, 27 is the universal joint inner ring, 28 is the bearing housing, 29 is the large diameter section, 30 is the small diameter section, 31 is the end cap, 32 is the tailstock connecting tube, 33 is the connector, 34 is the sliding cylinder, 35 is the sliding rod, 36 is the elongated groove, 37 is the key, 38 is the feed ring, 39 is the locking ring, 40 is the feed pin, 41 is the elongated hole, 42 is the connecting inner rod, 43 is the first cylindrical section, 44 is the first square section, 45 is the square groove, 46 is the second cylindrical section, 47 is the second square section, and 48 is the inner boss. Detailed Implementation

[0040] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0041] like Figure 1 As shown in Figure 19, the present invention provides a honing rod for honing rifling grooves, including a honing head 1, a connecting mechanism 3, a manual pushing mechanism 4, and a connecting outer rod 2.

[0042] The honing head 1 includes a body 5, a front push rod 20, a push rod seat 19, a retraction spring 21, six honing assemblies, and a locking spring 18. Each honing assembly includes a push rod 22, an infeed spring 23, a push plate 14, a lifting honing stone seat 15, and a rotating honing stone seat 16.

[0043] The main body 5 is a cylindrical structure. A cylindrical push rod groove 6 is provided at the rear end face of the main body 5, and the push rod groove 6 coincides with the axis of the main body 5. Two arc-shaped front docking blocks 12 are symmetrically arranged at the rear end of the main body 5. The arc angle of the front docking blocks 12 is 90°, and the front docking blocks 12 coincide with the side wall of the main body 5 at the push rod groove 6.

[0044] Six rotating grooves 7 are evenly arranged on the outer side of the body 5 along the circumference, the length direction of the rotating grooves 7 is parallel to the axis direction of the body 5; the rotating grooves 7 include a square front side section 8, a circular middle section 9, and a square rear side section 10, the width of the rear side section 10 is smaller than the inner diameter of the middle section 9, and the width of the front side section 8 is larger than the inner diameter of the middle section 9.

[0045] An elevating groove 11 is arranged at the inner bottom surface of each rotating groove 7, the length direction of the elevating groove 11 is parallel to the length direction of the corresponding rotating groove 7, the front end of the elevating groove 11 is located at the rear side of the front end of the rotating groove 7, the width of the elevating groove 11 is equal to the width of the rear side section 10 of the rotating groove 7, and the rear end of the elevating groove 11 extends rearward to communicate with the push rod groove 6. A rotating shaft hole is arranged at the inner bottom surface of the elevating groove 11, the axis of the rotating shaft hole coincides with the axis of the middle section 9 of the rotating groove 7. The middle section 9 of the rotating groove 7 extends inward to the middle height of the elevating groove 11.

[0046] A push piece 14 is arranged at the inner bottom surface of the elevating groove 11, the length direction of the push piece 14 coincides with the length direction of the elevating groove 11; the two side surfaces of the push piece 14 respectively contact the two inner walls of the elevating groove 11; the inner side surface of the push piece 14 is a plane and is in close contact with the inner bottom surface of the elevating groove 11, the outer side surface of the push piece 14 is an inner inclined surface, and the distance between the rear end of the inner inclined surface of the push piece 14 and the axis of the body 5 is smaller than the distance between the front end of the inner inclined surface and the axis of the body 5.

[0047] An elevating oil stone seat 15 is further arranged in the elevating groove 11, and the elevating oil stone seat 15 is located at the outer side of the push piece 14. The middle part of the elevating oil stone seat 15 is a first cylindrical section 43, and the front and rear sides of the elevating oil stone seat 15 are first square sections 44, wherein the outer side surface of the first cylindrical section 43 contacts the inner wall of the part of the middle section 9 of the rotating groove 7 extending into the elevating groove 11, and the two side surfaces of the front and rear first square sections 44 respectively contact the two inner walls of the elevating groove 11. The inner side surface of the elevating oil stone seat 15 is an outer inclined surface, the distance between the rear end of the outer inclined surface and the axis of the body 5 is greater than the distance between the front end of the outer inclined surface and the axis of the body 5, and the outer side surface of the elevating oil stone seat 15 is a plane and is parallel to the axis of the body 5. The inner inclined surface of the push piece 14 is in close contact with the outer inclined surface of the elevating oil stone seat 15. The outer side surface of the elevating oil stone seat 15 is provided with a square groove 45 at the front side of the first cylindrical section 43, and the square groove 45 communicates with the two side surfaces of the elevating oil stone seat 15.

[0048] A rotating shaft through hole is arranged at the first cylindrical section 43 of the elevating oil stone seat 15, and a rotating shaft long through hole is arranged on the push piece 14, the length direction of the rotating shaft long through hole coincides with the length direction of the push piece 14, and the rotating shaft sequentially passes through the rotating shaft through hole of the elevating oil stone seat 15, the rotating shaft long through hole of the push piece 14, and is fixedly connected with the body 5.

[0049] A rotating oil stone seat 16 is arranged inside the rotating groove 7. The middle part of the rotating oil stone seat 16 is a second cylindrical section 46, and the front and rear sides of the rotating oil stone seat 16 are second square sections 47. The outer side of the second cylindrical section 46 is in contact with the inner wall of the middle section 9 of the rotating groove 7, and the widths of the front and rear sides of the second square sections 47 are less than the widths of the front section 8 and the rear section 10 of the rotating groove 7. The outer side of the rotating oil stone seat 16 extends to the outside of the outer side of the body 5, and a honing tool body 17 is fixedly arranged on the outer side of the rotating oil stone seat 16. The length direction of the honing tool body 17 is parallel to the axis direction of the body 5. The inner side of the rotating oil stone seat 16 is in contact with the outer side of the lifting oil stone seat 15, and a semicylindrical inner boss 48 is fixedly arranged on the inner side of the rotating oil stone seat 16. The axis direction of the inner boss 48 is perpendicular to the length direction of the rotating oil stone seat 16. The inner boss 48 is located inside the square groove 45 of the lifting oil stone seat 15, and a through connection hole is arranged at the axis of the inner boss 48.

[0050] An outer side annular groove 13 is arranged on the outer side of the body 5. The axis of the outer side annular groove 13 coincides with the axis of the body 5, and the outer side annular groove 13 is located in front of the middle section 9 of the rotating groove 7. An annular locking spring 18 is arranged inside the outer side annular groove 13. The locking spring 18 passes through the connection holes of the six rotating oil stone seats 16, so that the six rotating oil stone seats 16 are connected by the locking spring 18. The elastic force directions of the locking spring 18 on the six rotating oil stone seats 16 are along the radial direction of the body 5 towards the axis of the body 5.

[0051] A cylindrical push rod seat 19 is arranged inside the push rod groove 6. The axis of the push rod seat 19 coincides with the axis of the body 5. A retreat spring 21 is arranged between the front end face of the push rod seat 19 and the inner bottom face of the push rod groove 6. The front end of the front push rod 20 extends into the push rod groove 6 of the body 5. The axis of the front push rod 20 coincides with the axis of the body 5, and the front end face of the front push rod 20 is in contact with the rear end face of the push rod seat 19.

[0052] A push rod 22 is arranged at the rear end of each push piece 14. The axis direction of the push rod 22 is parallel to the axis direction of the body 5. A anti-falling groove is arranged at the rear end face of each push piece 14, and an anti-falling ring is fixedly arranged at the front end of the push rod 22. The front end of the push rod 22 is inserted into and can slide in the anti-falling groove of the push piece 14, and the anti-falling ring can prevent the front end of the push rod 22 from falling out of the anti-falling groove. The rear end of each push rod 22 extends into the push rod groove 6 through the lifting groove 11, and is fixedly connected with the push rod seat 19. An advancing spring 23 is sleeved on the outer side of each push rod 22. The two ends of the advancing spring 23 are in contact with the push piece 14 and the push rod seat 19 respectively.

[0053] An annular fixing groove is arranged on the outer side of the rear side of the body 5, and an annular rear nylon ring is fixedly arranged in the fixing groove. The maximum outer diameter of the rear nylon ring is greater than the outer diameter of the body 5. A front nylon sheath is fixedly arranged at the front end of the body 5 by means of a screw, and the maximum outer diameter of the front nylon sheath is greater than the outer diameter of the body 5. The rear nylon ring and the front nylon sheath are arranged to play a centering and protection role.

[0054] The connecting outer rod 2 is a circular cylindrical structure with open front and rear ends. A universal tail end 26 is fixedly arranged at the front end of the connecting outer rod 2. The universal tail end 26 is a circular cylindrical structure. Two circular-arc rear abutting blocks are symmetrically arranged at the front end of the universal tail end 26. The angle of the arc of the rear abutting blocks is 90°. The outer side surface of the rear abutting blocks coincides with the outer side surface of the universal tail end 26. The inner side surface of the rear abutting blocks is a plane and is parallel to the axis of the universal tail end 26. The two rear abutting blocks on the universal tail end are staggered with the two front abutting blocks 12 on the body 5 and are engaged with each other. The outer diameter of the rear abutting blocks is equal to the outer diameter of the front abutting blocks 12. A universal joint inner ring 27 in a cubic structure is arranged between the two rear abutting blocks. The universal joint inner ring 27 is provided with a through hole, and the axis of the through hole coincides with the axis of the universal tail end 26. The universal joint inner ring 27 is in contact with the inner side surface of the two rear abutting blocks. A through hole is arranged on one of the rear abutting blocks and one of the front abutting blocks 12 and is in communication with the inside and outside. A universal pin is fixedly arranged in the universal joint inner ring 27 after penetrating the through holes on the rear abutting blocks and the front abutting blocks 12.

[0055] The rear end of the front push rod 20 penetrates the universal joint inner ring 27 and the universal tail end 26 and extends into the connecting outer rod 2.

[0056] The connecting mechanism 3 includes a connecting head 33, a bearing box 28, and a tail seat connecting pipe 32.

[0057] The bearing box 28 is a stepped cylindrical structure, including a small diameter section 30 at the front side and a large diameter section 29 at the rear side, and an end cover 31 is fixedly arranged at the opening at the rear end of the large diameter section 29 of the bearing box 28. A tailstock connecting pipe 32 is inserted into the end cover 31, the tailstock connecting pipe 32 is a tubular structure with both ends open, the front end of the tailstock connecting pipe 32 extends into the inside of the large diameter section 29 of the bearing box 28, and a connecting head 33 is fixedly arranged at the rear end of the tailstock connecting pipe 32, the connecting head 33 is fixed to the honing machine, thereby driving the entire honing rod to rotate. A bidirectional thrust angular contact ball bearing is arranged between the outer side surface of the front end of the tailstock connecting pipe 32 and the inner side surface of the large diameter section 29 of the bearing box 28, a fixed step is arranged on the outer side surface of the tailstock connecting pipe 32, and the bidirectional thrust angular contact ball bearing is fixed between the inner side surface of the large diameter section 29 and the outer side surface of the tailstock connecting pipe 32 by screwing the locking nut to the front end of the tailstock connecting pipe 32 and the fixed step. A sliding cylinder 34 is fixedly arranged in the opening at the front end of the tailstock connecting pipe 32, and the front end of the sliding cylinder 34 remains open.

[0058] A sliding rod 35 is arranged in the small diameter section 30 of the bearing box 28, the sliding rod 35 is coaxially arranged with the bearing box 28, the rear end of the sliding rod 35 extends into the inside of the sliding cylinder 34, and the outer side surface of the rear end of the sliding rod 35 is in close contact with the inner side surface of the sliding cylinder 34. A long circular groove 36 penetrating through both ends is arranged on the sliding rod 35 in the radial direction, and the length direction of the long circular groove 36 is parallel to the axis direction of the sliding rod 35. A key groove is correspondingly arranged on the side wall of the small diameter section 30 of the bearing box 28, a key 37 is fixedly arranged in the key groove, the key 37 passes through the long circular groove 36 on the sliding rod 35, and the key 37 slides in the long circular groove 36 on the sliding rod 35 when the sliding rod 35 slides in the small diameter section 30.

[0059] A hand propelling mechanism 4 is arranged outside the small diameter section 30 of the bearing box 28, which comprises an infeed ring 38 and a lock ring 39, both of which are circular ring structures and are screwed to the outside of the small diameter section 30 of the bearing box 28. An inner annular groove is arranged on the inner side of the infeed ring 38, and an infeed pin 40 is arranged inside the inner annular groove. The infeed pin 40 is arranged along the radial direction of the infeed ring 38, and the outer end of the infeed pin 40 is located inside the inner annular groove of the infeed ring 38. A long circular hole 41 is arranged on the sidewall of the small diameter section 30 of the bearing box 28, and the length direction of the long circular hole 41 is parallel to the axis of the bearing box 28. The inner end of the infeed pin 40 is fixedly connected with the sliding rod 35 after passing through the long circular hole 41. When the infeed ring 38 moves outside the small diameter section 30 of the bearing box 28, the outer end of the infeed pin 40 slides inside the inner annular groove of the infeed ring 38. The infeed ring 38 drives the infeed pin 40 to slide forward and backward, and the infeed pin 40 drives the sliding rod 35 to slide forward and backward inside the small diameter section 30 of the bearing box 28. The lock ring 39 is located in front of the infeed ring 38.

[0060] The front end of the small diameter section 30 of the bearing box 28 is fixedly connected with the rear end of the connecting outer rod 2. The connecting inner rod 42 is arranged inside the connecting outer rod 2, the front end of the connecting inner rod 42 is fixedly connected with the rear end of the front push rod 20, and the rear end of the connecting inner rod 42 extends into the small diameter section 30 of the bearing box 28 and is fixedly connected with the front end of the sliding rod 35.

[0061] The working principle of the present application is as follows:

[0062] After the honing rod is fixed on the honing machine, the front end of the honing rod is extended into the pipe wall of the bore guiding part. Then the lock ring 39 is rotated to move forward, and the infeed ring 38 is also rotated to slide forward. In the process of forward movement of the infeed ring 38, the infeed pin 40 is also moved forward, and the infeed pin 40 drives the sliding rod 35 to slide forward. The sliding rod 35 drives the connecting inner rod 42 to slide forward, and the connecting inner rod 42 drives the front push rod 20 to slide forward. The front push rod 20 drives the push rod seat 19 to slide forward, and the push rod seat 19 compresses the retraction spring 21. At the same time, the push rod seat 19 pushes the six push rods 22 to move synchronously, the infeed spring 23 is compressed, and the push piece 14 slowly moves forward under the elastic force of the infeed spring 23. When the front end of the push rod 22 is in complete contact with the inner bottom surface of the anti-separation groove at the rear end of the push piece 14, the push rod 22 pushes the push piece 14 to move forward synchronously. Since the push piece 14 and the lifting oil stone seat 15 are in contact through the inclined surface, the lifting oil stone seat 15 starts to move outward along the radial direction of the body 5 under the action of the inclined surface. The rotating oil stone seat 16 moves outward along the radial direction of the body 5 synchronously with the lifting oil stone seat 15, and the honing tool body 17 outside the rotating oil stone seat 16 is in close contact with the pipe wall of the bore guiding part.

[0063] After the feed ring 38 moves to the set position and stops moving, the lock ring 39 is rotated to move backward until the lock ring 39 contacts the feed ring 38, and the feed ring 38 is locked by the lock ring 39, thereby preventing the sliding rod 35 from retreating under the force of the retreat spring 21.

[0064] Then the honing machine drives the honing rod to move forward and backward, and since the rotary oil stone seat 16 can rotate around the rotating shaft inside the rotating groove 7 of the body 5, the honing blade 17 is rotated to adapt to the angle of the rifling, so that the six honing blades 17 simultaneously hone the rifling inside the barrel.

[0065] When the honing is completed, the lock ring 39 is rotated to move forward, and then the feed ring 38 is rotated to move backward, the feed ring 38 drives the sliding rod 35 to move backward synchronously until it returns to the initial position, the push rod seat 19 starts to retreat under the rebound force of the retreat spring 21, the front push rod 20, the connecting inner rod 42 and the sliding rod 35 start to retreat synchronously, the six push rods 22 retreat synchronously, and the push piece 14 starts to retreat after losing resistance. Since the six rotary oil stone seats 16 are connected by the locking spring 18, the six rotary oil stone seats 16 and the six lifting oil stone seats 15 are retracted along the radial direction of the body 5 under the rebound force of the locking spring 18. Finally, the lock ring 39 is rotated to move backward until it returns to the initial position, and the honing rod returns to the initial state.

[0066] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalency of the claims are intended to be embraced therein. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A honing bar for honing a rifling groove, characterized by: The application relates to a honing head (1) which comprises a body (5) in a cylindrical structure, the rear end of the body (5) is provided with a push rod groove (6), a push rod seat (19) is arranged in the push rod groove (6), a tool withdrawal spring (21) is arranged between the push rod seat (19) and the bottom surface of the push rod groove (6); six rotating grooves (7) are uniformly arranged on the outer side of the body (5) along the circumference, a lifting groove (11) is arranged at the inner bottom surface of the rotating groove (7), the rear end of the lifting groove (11) is communicated with the push rod groove (6), a push piece (14) is arranged in the lifting groove (11), a lifting oil stone seat (15) is arranged on the outer side of the push piece (14), a rotating oil stone seat (16) is arranged on the outer side of the lifting oil stone seat (15), the rotating oil stone seat (16) rotates in the rotating groove (7), the push piece (14) and the lifting oil stone seat (15) are in contact through a slope, the rear end of each push piece (14) is connected with the push rod seat (19) through a push rod (22), the six rotating oil stone seats (16) are connected through an annular locking spring (18); the front end of a front push rod (20) extends into the push rod groove (6) of the body (5) and is in contact with the rear end surface of the push rod seat (19); a honing tool body (17) is fixedly arranged on the outer side of the rotating oil stone seat (16); The application further comprises a connecting outer rod (2), the connecting outer rod (2) is a circular cylindrical structure with openings at the front and rear ends, a connecting inner rod (42) is arranged in the connecting outer rod (2); the front end opening of the connecting outer rod (2) is connected with the rear end of the body (5), the rear end of the front push rod (20) extends into the connecting outer rod (2) and is fixedly connected with the front end of the connecting inner rod (42); A connecting mechanism (3) is arranged at the rear end of the connecting outer rod (2), the connecting mechanism (3) comprises a connecting head (33), a bearing box (28) and a tailstock connecting pipe (32), the bearing box (28) comprises a small-diameter section (30) at the front side and a large-diameter section (29) at the rear side, an end cover (31) is arranged at the opening at the rear side of the large-diameter section (29), the front end of the tailstock connecting pipe (32) extends into the large-diameter section (29) through the end cover (31), the tailstock connecting pipe (32) is connected with the large-diameter section (29) through a bearing, and the tailstock connecting pipe (32) is provided with the connecting head (33) at the rear end; a sliding cylinder (34) is fixedly arranged at the front end opening of the tailstock connecting pipe (32), a sliding rod (35) is slidably connected in the sliding cylinder (34), and the front end of the sliding rod (35) is located in the small-diameter section (30) of the bearing box (28); a long circular groove (36) penetrating through both ends is arranged on the sliding rod (35) along the radial direction, a key groove is correspondingly arranged on the side wall of the small-diameter section (30) of the bearing box (28), and a key (37) is fixedly arranged in the key groove and penetrates through the long circular groove (36) on the sliding rod (35). A manual advancing mechanism (4) is arranged outside the small diameter section (30) of the bearing box (28), and the manual advancing mechanism (4) comprises an advancing ring (38) and a locking ring (39), both of which are circular ring structures and are screwed to the outside of the small diameter section (30) of the bearing box (28); an inner annular groove is arranged on the inner side of the advancing ring (38), and an advancing pin (40) is arranged inside the inner annular groove along the radial direction of the advancing ring (38); a long circular hole (41) is arranged on the sidewall of the small diameter section (30) of the bearing box (28), and the length direction of the long circular hole (41) is parallel to the axis of the bearing box (28); the outer end of the advancing pin (40) is located inside the inner annular groove of the advancing ring (38), and the inner end of the advancing pin (40) is fixedly connected with the sliding rod (35) after penetrating through the long circular hole (41); the locking ring (39) is located in front of the advancing ring (38); After the honing rod is fixed on the honing machine, the front end of the honing rod is inserted into the pipe wall of the barrel guiding part; then the locking ring is rotated to move forward, and the advancing ring is also rotated to slide forward; the advancing ring drives the advancing pin to move forward during the advancing process, the advancing pin drives the sliding rod to slide forward, the sliding rod drives the connecting inner rod to slide forward, the connecting inner rod drives the front push rod to slide forward, and the front push rod drives the push rod seat to slide forward; the push rod seat compresses the retracting spring; at the same time, the push rod seat pushes the six push rods to move synchronously, the advancing spring starts to be compressed, the push piece slowly moves forward under the rebounding force of the advancing spring, and when the inner bottom surface of the anti-disengagement groove at the front end of the push rod and the rear end of the push piece is completely contacted, the push rod pushes the push piece to move forward synchronously; since the push piece and the lifting oil stone seat are in contact through the inclined surface, the lifting oil stone seat starts to move outward along the radial direction of the body under the action of the inclined surface, the rotating oil stone seat moves outward along the radial direction of the body synchronously with the lifting oil stone seat, and the honing blade body outside the rotating oil stone seat is in close contact with the pipe wall of the barrel guiding part; The advancing ring stops moving after moving to the set position, the locking ring is rotated to move backward until the locking ring is contacted with the advancing ring, and the advancing ring is locked through the locking ring, so as to prevent the sliding rod from retreating under the action of the retracting spring; Then the honing machine drives the honing rod to move back and forth, and since the rotating oil stone seat can rotate in the rotating groove of the body around the rotating shaft, the honing blade body is rotated to adapt to the angle of the rifling, so that the six honing blade bodies are used to synchronously hone the rifling in the barrel; When the honing is completed, the lock knife ring is rotated to move forward, and then the knife ring is rotated to move backward, the knife ring drives the sliding rod to move backward synchronously until it returns to the initial position, the push rod seat starts to retreat under the resilience of the retreat spring, the front push rod, the connecting inner rod and the sliding rod start to retreat synchronously, the six push rods retreat synchronously, and the push piece starts to retreat after losing resistance; since the six rotating oil stone seats are connected through the locking spring, the six rotating oil stone seats and the six lifting oil stone seats are retracted along the radial direction of the body under the resilience of the locking spring; finally, the lock knife ring is rotated to move backward until it returns to the initial position, and the honing rod returns to the initial state.

2. A honing bar for honing a rifling groove according to claim 1, characterized in that: The length direction of the rotating groove (7) and the lifting groove (11) is parallel to the axis direction of the body (5); the rotating groove (7) comprises a square front side section (8), a circular middle section (9) and a square rear side section (10), the width of the rear side section (10) is smaller than the inner diameter of the middle section (9), and the width of the front side section (8) is greater than the inner diameter of the middle section (9); the width of the lifting groove (11) is equal to the width of the rear side section (10) of the rotating groove (7), and the middle section (9) of the rotating groove (7) extends inward to the middle height of the lifting groove (11).

3. A honing bar for honing a rifling groove according to claim 2, characterized in that: The two side surfaces of the push piece (14) are in contact with the two inner walls of the lifting groove (11) respectively; the outer surface of the push piece (14) is an inner inclined surface, the distance between the rear end of the inner inclined surface of the push piece (14) and the axis of the body (5) is smaller than the distance between the front end of the inner inclined surface and the axis of the body (5); the inner surface of the lifting oil stone seat (15) is an outer inclined surface, the distance between the rear end of the outer inclined surface of the lifting oil stone seat (15) and the axis of the body (5) is greater than the distance between the front end of the outer inclined surface and the axis of the body (5); the inner inclined surface of the push piece (14) is tightly attached to the outer inclined surface of the lifting oil stone seat (15).

4. A honing bar for honing a rifling groove according to claim 2, characterized in that: The middle part of the lifting oil stone seat (15) is a first cylindrical section (43), and the front and rear sides of the lifting oil stone seat (15) are first square sections (44), wherein the outer surface of the first cylindrical section (43) is in contact with the inner wall of the middle section (9) of the rotating groove (7) extending to the inner part of the lifting groove (11), and the two side surfaces of the first square sections (44) are in contact with the two inner walls of the lifting groove (11) respectively; the middle part of the rotating oil stone seat (16) is a second cylindrical section (46), and the front and rear sides of the rotating oil stone seat (16) are second square sections (47), wherein the outer surface of the second cylindrical section (46) is in contact with the inner wall of the middle section (9) of the rotating groove (7), and the widths of the second square sections (47) on the front and rear sides are smaller than the widths of the front side section (8) and the rear side section (10) of the rotating groove (7) respectively.

5. A honing bar for honing a rifling groove according to claim 3, characterized in that: The outer side of the lifting oil stone seat (15) is provided with a square groove (45); the inner side of the rotating oil stone seat (16) is fixedly provided with a semi-cylindrical inner boss (48), the inner boss (48) is located inside the square groove (45) of the lifting oil stone seat (15), and a through connection hole is arranged at the axis of the inner boss (48); an outer side annular groove (13) is arranged on the outer side of the body (5), an annular locking spring (18) is arranged inside the outer side annular groove (13), the locking spring (18) passes through the connection holes of the six rotating oil stone seats (16) respectively, and the elastic force directions of the locking spring (18) to the six rotating oil stone seats (16) are all along the radial direction of the body (5) to the axis of the body (5).

6. A honing bar for honing a rifling groove as defined in claim 1, characterized in that: A anti-off groove is arranged at the rear end surface of each push piece (14), a anti-off ring is fixedly arranged at the front end of the push rod (22), the front end of the push rod (22) is inserted into the anti-off groove of the push piece (14) and can slide in the anti-off groove; the rear end of each push rod (22) is fixedly connected with the push rod seat (19), an advancing spring (23) is sleeved on the outer side of each push rod (22), and the two ends of the advancing spring (23) are in contact with the push piece (14) and the push rod seat (19) respectively.

7. The honing bar of claim 1 wherein: The front end of the small diameter section (30) of the bearing box (28) is fixedly connected with the rear end of the connecting outer rod (2), the rear end of the connecting inner rod (42) extends into the small diameter section (30) of the bearing box (28) and is fixedly connected with the front end of the sliding rod (35).

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