Multi-group rifling broaching device and method for small-caliber barrel

Abstract

The invention discloses a multi-group rifling broaching device and method for a small-caliber barrel, and provides the multi-group rifling broaching device for the small-caliber barrel. A table; the stand column is fixedly arranged at the top end of the workbench; the limiting column is rotationally arranged on one side of the stand column through a bearing; the body pipe is adaptively connected to the outer wall of the limiting column in a sleeving manner; the fixing mechanism is arranged on one side of the top end of the workbench; and the broaching mechanism is arranged on the other side of the top end of the workbench. According to the multi-group rifling broaching device and method for the small-caliber barrel, the barrel can be fixed and limited by arranging the fixing mechanism, the cutting tool bit can be driven to move along the limiting groove by arranging the broaching mechanism so that a spiral groove in the inner surface of the barrel can be cut, and the cutting tool bit can stably move under the limitation of the limiting column, so that the machining efficiency is improved. And inconsistent rifling depth is avoided, and the machining quality of the rifling is improved.

Description

Technical Field

[0001] The invention relates to the technical field of barrel processing, and in particular to a device and method for broaching multiple rifling groups of a small-caliber barrel. Background Art

[0002] Small-caliber barrels refer to the smaller diameter of the barrel in a firearm, which is used to shoot ammunition. Caliber refers to the diameter of the barrel, usually measured in millimeters or inches. Small-caliber barrels are usually used in light weapons such as pistols and submachine guns. Their caliber is generally less than 9 mm. This type of firearm is often used in police duty, self-defense, and shooting training.

[0003] The rifling process of a small-caliber barrel refers to cutting a certain spiral pattern on the inner surface of the gun, which is used to stabilize the bullet flight trajectory and increase shooting accuracy. The common method of rifling processing is spiral cutting. Spiral cutting is a common rifling processing method, which uses a special spiral cutting tool to cut a spiral groove into the inner surface of the barrel by rotating and advancing.

[0004] However, in actual operation, the barrel being cut is relatively long, which causes the broach to move unstably during the cutting process, resulting in an unstable inner cavity of the rifling, which reduces product quality, and the existing processing method has low processing efficiency. Summary of the invention

[0005] The object of the present invention is to provide a device and method for broaching multiple rifling groups of a small-caliber barrel to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device and method for broaching multiple rifling groups of a small-caliber barrel, providing a device for broaching multiple rifling groups of a small-caliber barrel, comprising:

[0007] Workbench;

[0008] A column, fixedly arranged on the top of the workbench;

[0009] A limiting column, rotatably arranged on one side of the column through a bearing;

[0010] A barrel, adapted to be fitted on the outer wall of the limiting column;

[0011] A fixing mechanism, arranged on one side of the top end of the workbench;

[0012] The broaching mechanism is arranged on the other side of the top end of the workbench.

[0013] Preferably, in order to be able to fix the barrel on the limiting column, the fixing mechanism includes: a base, fixedly arranged on one side of the top end of the workbench; support columns, with support columns fixedly arranged on both sides of the top end of the base; a fixing sleeve, fixedly arranged on the top end of the support sleeve, and the barrel is adapted to be plugged in with the fixing sleeve; a bolt, threadedly connected to the top end of the fixing sleeve, and the bolt locks the barrel in the fixing sleeve.

[0014] Preferably, the broaching mechanism includes: a mounting seat, fixedly arranged on the other side of the top of the workbench; a reduction motor, fixedly arranged on the top of the rear side of the mounting seat; a turntable, on which the output end of the reduction motor extends out of the front side of the mounting seat and is fixedly provided with a turntable; a pull rod, adapted to be plugged into one end of the limiting column; a cutting bit, fixedly arranged on one end of the outer wall of the pull rod, a limiting groove is provided on the outer wall of the limiting column, and the cutting bit is plugged into one side of the inner cavity of the limiting groove; a connecting block, rotatably arranged on one end of the pull rod through a bearing; a connecting rod, a connecting rod is rotatably arranged on one side of the outer wall of the turntable, and the other end of the connecting rod is rotatably connected to one side of the connecting block through a pin shaft.

[0015] Preferably, the limiting groove is arranged around the outer wall of the limiting column from left to right.

[0016] Preferably, the barrel is located between the left and right sides of the inner cavity of the limiting groove.

[0017] Preferably, part of the cutting bit extends out of the inner cavity of the limiting groove.

[0018] Preferably, the broaching mechanism also includes: a stepper motor, fixedly arranged on one side of the column; a first gear, the output end of the stepper motor extends into the inner cavity of the column and is keyed to the first gear; a second gear, keyed to the outer wall of the limit column, and the second gear is meshed with the first gear.

[0019] A method for using a small-caliber barrel multi-group rifling broaching device comprises the following steps:

[0020] Step 1: Sleeve the barrel on the limiting column and insert it into the fixing sleeve, move the barrel to the inner side of the limiting groove, and tighten the bolt to fix the barrel;

[0021] Step 2: Start the reduction motor, which can drive the turntable to rotate clockwise around its own axis, so that the turntable drives one end of the connecting rod to rotate clockwise, so that the other end of the connecting rod pushes the pull rod to move back and forth left and right through the connecting block, so that when the pull rod is pushed, the pull rod drives the cutting tool head to slide in the limiting groove, so that when it contacts the barrel, the spiral groove can be directly cut into the inner surface of the barrel;

[0022] Step three: Start the stepper motor. After the pull rod drives the cutting head to reciprocate once, the stepper motor can drive the first gear to rotate clockwise around its own axis by a certain angle, so that the first gear drives the second gear to rotate counterclockwise by a first angle, thereby causing the second gear to drive the limit column to rotate counterclockwise by a certain angle, thereby completing the cutting of multiple sets of rifling in the barrel.

[0023] The invention provides a small-caliber barrel multi-group rifling broaching device and method, which has the following beneficial effects:

[0024] 1. The present invention can achieve fixed position limitation of the barrel by providing a fixing mechanism, and can drive the cutting head to move along the limiting groove by providing a broaching mechanism, so as to realize cutting of the spiral groove on the inner surface of the barrel, and under the restriction of the limiting column, the cutting head can move smoothly, avoid inconsistent rifling depth, and improve the processing quality of the rifling;

[0025] 2. The present invention realizes the counterclockwise rotation of the limit column by controlling the precise rotation of the limit column, thereby completing the cutting of multiple groups of rifling, making the rifling processing more convenient and quick, and being able to meet the needs of small-caliber barrel rifling processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 For the present invention Figure 1 A in the enlarged view;

[0028] Figure 3 It is a schematic diagram of the assembly structure of the turntable of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the limiting column of the present invention;

[0030] Figure 5 It is a right side sectional view of the column of the present invention.

[0031] In the figure: 1. workbench; 2. column; 3. limit column; 4. barrel; 5. fixing mechanism; 51. base; 52. support column; 53. fixing sleeve; 54. bolt; 6. broaching mechanism; 61. mounting seat; 62. reduction motor; 63. turntable; 64. pull rod; 65. cutting head; 66. connecting block; 67. connecting rod; 68. stepping motor; 69. first gear; 610. second gear; 611. limit groove. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1, please refer to Figure 1-5 The present invention provides a technical solution: a small-caliber barrel multiple-group rifling broaching device and method, a small-caliber barrel multiple-group rifling broaching device, comprising: a workbench 1, a column 2, a limit column 3, a barrel 4, a fixing mechanism 5 and a broaching mechanism 6;

[0034] The column 2 is fixedly set on the top of the workbench 1, the limit column 3 is rotatably set on one side of the column 2 through a bearing, the barrel 4 is adapted to be connected to the outer wall of the limit column 3, the fixing mechanism 5 is set on one side of the top of the workbench 1, and the broaching mechanism 6 is set on the other side of the top of the workbench 1.

[0035] As a preferred solution, further, the fixing mechanism 5 includes: a base 51, a support column 52, a fixing sleeve 53 and a bolt 54;

[0036] In order to limit the position of the barrel 4, the base 51 is fixedly arranged on one side of the top of the workbench 1, and support columns 52 are fixedly arranged on the left and right sides of the top of the base 51. The fixing sleeve 53 is fixedly arranged on the top of the support column 52. The barrel 4 and the fixing sleeve 53 are adapted to be plugged in, and the bolt 54 is screwed with the top of the fixing sleeve 53, and the bolt 54 locks the barrel 4 in the fixing sleeve 53, which is convenient for taking and fixing the barrel 4 and convenient for processing.

[0037] As a preferred solution, further, the broaching mechanism 6 includes: a mounting seat 61, a reduction motor 62, a rotating disk 63, a pull rod 64, a cutting tool head 65, a connecting block 66, a connecting rod 67, a stepping motor 68, a first gear 69, a second gear 610 and a limiting groove 611;

[0038] In order to drive the pull rod 64 to move back and forth, the mounting seat 61 is fixedly set on the other side of the top of the workbench 1, the reduction motor 62 is fixedly set on the rear top of the mounting seat 61, the output end of the reduction motor 62 extends out of the front side of the mounting seat 61 and is fixedly provided with a turntable 63, the pull rod 64 is adapted to be plugged into one end of the limit column 3, the cutting head 65 is fixedly set at one end of the outer wall of the pull rod 64, the outer wall of the limit column 3 is provided with a limit groove 611, and the cutting head 65 is plugged into one side of the inner cavity of the limit groove 611, the connecting block 66 is rotatably set at one end of the pull rod 64 through a bearing, and a connecting rod 67 is rotatably set on one side of the outer wall of the turntable 63, and the other end of the connecting rod 67 is rotatably connected to one side of the connecting block 66 through a pin shaft.

[0039] Specifically, the limiting groove 611 is opened around the outer wall of the limiting column 3 from left to right, so that the cutting head 65 moves along the inner cavity of the limiting groove 611 to cut the spiral groove into the inner surface of the barrel.

[0040] As a preferred solution, further, the barrel 4 is located between the left and right sides of the inner cavity of the limiting groove 611 to complete the penetration processing of the barrel 4.

[0041] As a preferred solution, further, part of the cutting head 65 extends out of the inner cavity of the limiting groove 611 so as to be able to process the barrel 4.

[0042] In order to drive the limit column 3 to rotate a certain angle, the stepper motor 68 is fixedly arranged on one side of the column 2, and the output end of the stepper motor 68 extends into the inner cavity of the column 2 and is keyed to the first gear 69, and the second gear 610 is keyed to the outer wall of the limit column 3, and the second gear 610 is meshed with the first gear 69.

[0043] A method for using a small-caliber barrel multi-group rifling broaching device comprises the following steps:

[0044] Step 1: Put the barrel 4 on the limiting column 3 and insert it into the fixing sleeve 53, move the barrel 4 to the inside of the limiting groove 611, and tighten the bolt 54 to fix the barrel 4;

[0045] Step 2: Start the reduction motor 62, which can drive the turntable 63 to rotate clockwise around its own axis, so that the turntable 63 drives one end of the connecting rod 67 to rotate clockwise, so that the other end of the connecting rod 67 pushes the pull rod 64 to move back and forth through the connecting block 66, so that when the pull rod 64 is pushed, the pull rod 64 drives the cutting tool head 65 to slide in the limiting groove 611, so that when it contacts the barrel 4, the spiral groove can be directly cut into the inner surface of the barrel;

[0046] Step three: Start the stepper motor 68. After the pull rod 64 drives the cutting head 65 to reciprocate once, the stepper motor 68 can drive the first gear 69 to rotate clockwise around its own axis by a certain angle, so that the first gear 69 drives the second gear 610 to rotate counterclockwise by a first angle, thereby causing the second gear 610 to drive the limit column 3 to rotate counterclockwise by a certain angle, thereby completing the cutting of multiple groups of rifling in the barrel 4. The processing efficiency is high, which is conducive to wide promotion.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device and method for broaching multiple rifling groups of a small-caliber barrel, characterized in that: A device for broaching multiple rifling groups of a small-caliber barrel is provided, comprising: Workbench (1); A column (2) fixedly arranged on the top of the workbench (1); A limiting column (3) is rotatably arranged on one side of the column (2) via a bearing; A barrel (4) adapted to be fitted on the outer wall of the limiting column (3); A fixing mechanism (5) is arranged on one side of the top end of the workbench (1); The broaching mechanism (6) is arranged on the other side of the top end of the workbench (1).

2. A small-caliber barrel multi-group rifling broaching device according to claim 1, characterized in that: The fixing mechanism (5) comprises: A base (51) is fixedly arranged on one side of the top end of the workbench (1); Support columns (52), support columns (52) are fixedly arranged on both left and right sides of the top of the base (51); A fixing sleeve (53) is fixedly arranged on the top end of the support column (52), and the barrel (4) is adapted to be plugged into the fixing sleeve (53); A bolt (54) is threadedly connected to the top end of the fixing sleeve (53), and the bolt (54) locks the barrel (4) in the fixing sleeve (53).

3. A small-caliber barrel multi-group rifling broaching device according to claim 2, characterized in that: The broaching mechanism (6) comprises: A mounting seat (61) fixedly arranged on the other side of the top end of the workbench (1); A reduction motor (62) is fixedly arranged on the rear top end of the mounting seat (61); A rotating disk (63), the output end of the reduction motor (62) extends out of the front side of the mounting seat (61) and is fixedly provided with the rotating disk (63); A pull rod (64) adapted to be plugged into one end of the limiting column (3); A cutting bit (65) is fixedly arranged on one end of the outer wall of the pull rod (64); a limiting groove (611) is provided on the outer wall of the limiting column (3), and the cutting bit (65) is plugged into one side of the inner cavity of the limiting groove (611); A connecting block (66) is rotatably arranged at one end of the pull rod (64) via a bearing; A connecting rod (67) is rotatably provided on one side of the outer wall of the rotating disk (63), and the other end of the connecting rod (67) is rotatably connected to one side of the connecting block (66) through a pin shaft.

4. A small-caliber barrel multi-group rifling broaching device according to claim 3, characterized in that: The limiting groove (611) is arranged around the outer wall of the limiting column (3) from left to right.

5. A small-caliber barrel multi-group rifling broaching device according to claim 4, characterized in that: The barrel (4) is located between the left and right sides of the inner cavity of the limiting groove (611).

6. A small-caliber barrel multi-group rifling broaching device according to claim 5, characterized in that: Part of the cutting bit (65) extends out of the inner cavity of the limiting groove (611).

7. A small-caliber barrel multi-group rifling broaching device according to claim 6, characterized in that: The broaching mechanism (6) further comprises: A stepping motor (68) is fixedly arranged on one side of the column (2); A first gear (69), the output end of the stepping motor (68) extends into the inner cavity of the column (2) and is keyed to the first gear (69); The second gear (610) is key-connected to the outer wall of the limiting column (3), and the second gear (610) is meshed with the first gear (69).

8. A small-caliber barrel multi-group rifling broaching device according to claim 7, characterized in that: A method for using a small-caliber barrel multi-group rifling broaching device is provided, comprising the following steps: Step 1: Sleeve the barrel (4) onto the limiting column (3) and insert it into the fixing sleeve (53), move the barrel (4) to the inside of the limiting groove (611), and tighten the bolt (54) to fix the barrel (4); Step 2: Start the reduction motor (62), the reduction motor (62) can drive the turntable (63) to rotate clockwise around its own axis, so that the turntable (63) drives one end of the connecting rod (67) to rotate clockwise, so that the other end of the connecting rod (67) pushes the pull rod (64) to move back and forth left and right through the connecting block (66), so that when the pull rod (64) is pushed, the pull rod (64) drives the cutting tool head (65) to slide in the limiting groove (611), so that when it contacts the barrel (4), the spiral groove can be directly cut into the inner surface of the barrel; Step three: Start the stepper motor (68). After the pull rod (64) drives the cutting head (65) to cut back and forth once, the stepper motor (68) can drive the first gear (69) to rotate clockwise around its own axis by a certain angle, so that the first gear (69) drives the second gear (610) to rotate counterclockwise by a first angle, thereby causing the second gear (610) to drive the limit column (3) to rotate counterclockwise by a certain angle, thereby completing the cutting of multiple groups of rifling in the barrel (4).

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