Lightweight zl205a barrel bore numerical control precision machining device

Abstract

The application discloses a kind of light ZLA body tube bore numerical control precision machining device, comprising: numerical control machine tool;Chuck is arranged in the inner embedding side of numerical control machine tool;Guide rail is arranged in the inner cavity bottom end of numerical control machine tool;Body tube support mechanism is arranged in the top end side of guide rail;Adjustable bore processing mechanism is arranged in the top end other side of guide rail.The light ZLA body tube bore numerical control precision machining device, by rotating rotating block and driving lead screw rotation, utilize the reverse thread of lead screw outer wall and drive two sides lead screw nut reverse movement, further adjust roller spacing, cooperate with electric push rod to adjust roller height, can stably support different diameter ZL205A body tube;Adjustable bore processing mechanism adjusts the position of sliding block in sliding groove by rotating countersunk bolt, realize the position adjustment of bore cutter relative to push column, cooperate with screw drive second sliding seat movement, can adapt to the bore processing of different inner diameter body tube, effectively improve the versatility of device, reduce processing cost.

Description

Technical Field

[0001] This invention relates to the field of barrel machining technology, specifically to a lightweight CNC precision machining device for the inner bore of the ZL205A barrel. Background Technology

[0002] ZL205A aluminum alloy uses aluminum as the base material and copper as the main strengthening element, combined with trace alloying elements such as manganese and titanium to optimize the microstructure and properties. After T6 heat treatment, it has the characteristics of high strength and high heat resistance, and has significant lightweight advantages. It is widely used in the field of gun barrel manufacturing where there are strict requirements for material performance and weight, which can effectively reduce the overall weight of the gun barrel and improve the mobility and portability of equipment. The machining accuracy of the barrel bore and rifling directly determines the performance and service life of the barrel. In particular, the lightweight ZL205A barrel is made of softer material with a larger coefficient of thermal expansion. During the machining process, problems such as substandard surface roughness, dimensional accuracy fluctuations, part deformation, and chip entanglement are prone to occur, which puts forward higher requirements for the precision and adaptability of the machining equipment. Currently, most existing CNC machining devices for barrel bores are designed for traditional steel barrels and are difficult to adapt to the machining characteristics of ZL205A aluminum alloy. The barrel support mechanism is fixed and cannot be adjusted, making it impossible to flexibly adapt to ZL205A barrels of different diameters. The poor support stability leads to easy shaking during barrel machining, affecting the machining accuracy of the bore and rifling, and even causing machining deviations. When machining rifling, it cannot accurately adapt to the bore of barrels with different inner diameters, resulting in poor versatility. Specialized machining parts need to be replaced to complete the machining of barrels of different specifications, increasing machining costs and operational complexity. Summary of the Invention

[0003] The purpose of this invention is to provide a lightweight CNC precision machining device for the inner bore of the ZL205A barrel, so as to solve the problems of poor versatility, insufficient machining accuracy, and cumbersome operation of existing machining devices.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a lightweight ZLA barrel bore CNC precision machining device, comprising: CNC machine tools; A chuck is provided on one embedded side of the CNC machine tool; The guide rail is located at the bottom of the inner cavity of the CNC machine tool; The tube support mechanism is located on one side of the top of the guide rail; An adjustable rifling mechanism is located on the other side of the top of the guide rail.

[0005] Preferably, the tube support mechanism includes: a first slide block adapted to be fitted to one side of the top end of the guide rail; an electric push rod fixedly disposed at the top end of the first slide block; a cross column fixedly disposed at the top end of the electric push rod in the front-back direction; a lead screw rotatably disposed in the inner cavity of the cross column via a bearing in the front-back direction; a rotating block fixedly disposed at the front end of the lead screw extending out of the front side of the cross column; a strip-shaped hole opened at the top end of the cross column; lead screw nuts screwed to both the front and rear sides of the outer wall of the lead screw, and the lead screw nuts extending out of the inner cavity of the strip-shaped hole; a U-shaped frame fixedly disposed at the top end of the lead screw nut; and a roller rotatably disposed inside the U-shaped frame.

[0006] Preferably, the threads on the front and rear sides of the outer wall of the lead screw are arranged in opposite directions, and the lead screw nut is adapted to be inserted into the strip hole.

[0007] Preferably, the two rollers are arranged symmetrically with respect to the center of the chuck.

[0008] Preferably, the outer wall of the roller extends out of the inner side of the U-shaped frame.

[0009] Preferably, the top left and right sides of the first slide are screwed with first locking bolts, and the first locking bolts are in close contact with the top of the guide rail.

[0010] Preferably, the adjustable rifling mechanism includes: a second slide, which is adapted to be connected to the other side of the top end of the guide rail; a mounting block fixedly disposed at the top end of the second slide; a screw rotatably disposed on the inner side of the CNC machine tool via a bearing in the left-right direction, and the screw is screwed to the second slide; one end of the screw extends out of one side of the CNC machine tool and is fixedly disposed with a rotating handle; a hydraulic cylinder fixedly disposed on one side of the mounting block, and one end of the hydraulic cylinder extends out of one side of the CNC machine tool; the output end of the hydraulic cylinder extends out of one side of the mounting block and is fixedly disposed with a push column, the push column and the chuck are on the same center line; a groove is opened on one side of the push column, and a slider is inserted into the inner cavity of the groove; a countersunk bolt is rotatably disposed at the top end of the push column via a bearing, and the countersunk bolt is screwed to the slider; a crossbar is fixedly disposed on one side of the slider; and a rifling cutter is fixedly disposed on one side of the bottom end of the outer wall of the crossbar.

[0011] Preferably, the inner cavity of the slide groove is dovetail-shaped, and the slider is adapted to be inserted into the slide groove.

[0012] Preferably, a second locking bolt is screwed to both the front and rear ends of one side of the slider, and the second locking bolt is in close contact with one side of the inner cavity of the slide groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the lightweight ZLA barrel bore CNC precision machining device; 1. The barrel support mechanism of this invention is flexibly adjustable. By rotating the rotating block, the lead screw is driven to rotate. The reverse thread on the outer wall of the lead screw drives the nuts on both sides of the lead screw to move in the opposite direction, thereby adjusting the roller spacing. With the help of the electric push rod to adjust the roller height, it can stably support ZL205A barrels of different diameters. The adjustable rifling mechanism adjusts the position of the slider in the slide groove by rotating the countersunk bolt, thereby adjusting the position of the bore cutter relative to the push post. With the help of the screw to drive the second slide to move, it can be adapted to the rifling of barrels with different inner diameters. There is no need to replace special parts, which effectively improves the versatility of the device and reduces the processing cost. 2. The two rollers in the barrel support mechanism are symmetrically arranged relative to the center of the chuck, which can fit tightly against the outer wall of the barrel. The rollers can rotate with the barrel to avoid damage to the surface of the barrel during the support process. At the same time, they can effectively suppress the shaking of the barrel during machining and ensure the stability of the barrel rotation. The first locking bolt can fix the adjusted first slide on the guide rail, and the second locking bolt can lock the adjusted slider in the slide groove to prevent displacement of the support mechanism and the machining mechanism during machining. Combined with the precision control of the CNC machine tool, the machining accuracy of the inner bore and rifling of the ZL205A barrel is significantly improved, and the problem of difficult dimensional accuracy control in aluminum alloy machining is solved. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the tube support mechanism of the present invention; Figure 3 This is a partial exploded structural diagram of the tube support mechanism of the present invention; Figure 4 This is a right-side sectional view of the mounting block of the present invention; Figure 5 This is a left view of the pusher column of the present invention.

[0015] In the diagram: 1. CNC machine tool; 2. Chuck; 3. Guide rail; 4. Body support mechanism; 41. First slide; 42. Electric push rod; 43. Cross column; 44. Lead screw; 45. Rotary block; 46. Lead screw nut; 47. Strip hole; 48. U-shaped frame; 49. Roller; 410. First locking bolt; 5. Adjustable rifling machining mechanism; 51. Second slide; 52. Mounting block; 53. Screw; 54. Rotary handle; 55. Hydraulic cylinder; 56. Push column; 57. Slider; 58. Slide groove; 59. Countersunk bolt; 510. Cross bar; 511. Rifling cutter; 512. Locking bolt. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1-5 The present invention provides a technical solution: a lightweight ZL205A barrel bore CNC precision machining device, comprising: a CNC machine tool 1, a chuck 2, a guide rail 3, a barrel support mechanism 4, and an adjustable rifling machining mechanism 5; The chuck 2 is set on one side of the CNC machine tool 1, the guide rail 3 is set at the bottom of the inner cavity of the CNC machine tool 1, the tube support mechanism 4 is set on one side of the top of the guide rail 3, and the adjustable rifling processing mechanism 5 is set on the other side of the top of the guide rail 3.

[0018] As a preferred embodiment, the body support mechanism 4 further includes: a first slide block 41, an electric push rod 42, a cross column 43, a lead screw 44, a rotating block 45, a lead screw nut 46, a strip hole 47, a U-shaped frame 48, a roller 49, and a first locking bolt 410. To provide stable support for the body tubes on chucks 2 of different diameters, the first slide block 41 is fitted with one side of the top of the guide rail 3, allowing the first slide block 41 to slide on the guide rail 3. An electric push rod 42 is fixedly mounted on the top of the first slide block 41. The electric push rod 42 is existing technology. A horizontal column 43 is fixedly mounted on the top of the electric push rod 42 along the front-rear direction, enabling it to move up and down. A lead screw 44 is rotatably mounted in the inner cavity of the horizontal column 43 via bearings along the front-rear direction. The front end of the lead screw 44 extends out from the front side of the horizontal column 43 and is fixedly mounted with a rotating block 45. A strip-shaped hole 47 is opened at the top of the horizontal column 43. The outer walls of the lead screw 44 are screwed with screws on both the front and rear sides. A lead screw nut 46 extends into the inner cavity of a strip-shaped hole 47. A U-shaped frame 48 is fixedly mounted on the top of the lead screw nut 46. Rollers 49 are rotatably mounted on the inner side of the U-shaped frame 48. Rotating the rotating block 45 can drive the lead screw nut 46 to rotate. Under the rotational force of the thread on the outer wall of the lead screw nut 46, the lead screw nut 46 is driven to rotate outward or inward, thereby driving the two rollers 49 to rotate relative to each other to adjust the distance between the rollers 49. The height of the rollers 49 can be adjusted by the electric push rod 42, so that the two rollers 49 fit against the lower wall of the tube to provide stable support for tubes of different diameters and improve the stability of the tube during machining rotation.

[0019] As a preferred option, the threads on the front and rear sides of the outer wall of the lead screw 44 are arranged in opposite directions, and the lead screw nut 46 is adapted to be inserted into the strip hole 47. When the lead screw 44 rotates, the lead screw nuts 46 on both sides can move in opposite directions.

[0020] As a preferred embodiment, the two rollers 49 are arranged symmetrically with respect to the center of the chuck 2 so that the rollers 49 can contact the outer wall of the tube.

[0021] As a preferred embodiment, the outer wall of the roller 49 extends outward from the inner side of the U-shaped frame 48 so that the outer wall of the roller 49 can rotate in conjunction with the body tube.

[0022] As a preferred option, the first sliding block 41 is further provided with first locking bolts 410 screwed on both the left and right sides of its top end. The first locking bolts 410 are in close contact with the top end of the guide rail 3. By providing the first locking bolts 410, the first sliding block 41 can be fixed on the guide rail 3.

[0023] As a preferred embodiment, the adjustable rifling mechanism 5 further includes: a second slide 51, a mounting block 52, a screw 53, a rotating handle 54, a hydraulic cylinder 55, a pusher 56, a slider 57, a groove 58, a countersunk bolt 59, a crossbar 510, a rifling cutter 511, and a locking bolt 512. To accommodate rifling of barrels with different diameters, a second slide 51 is fitted to the other side of the top of the guide rail 3. A mounting block 52 is fixedly mounted on the top of the second slide 51. A screw 53 is rotatably mounted inside the CNC machine tool 1 via a bearing in the left-right direction, and is screwed to the second slide 51. One end of the screw 53 extends out of one side of the CNC machine tool 1 and is fixedly mounted with a handle 54. Rotating the screw 53 via the handle 54 causes the second slide 51 to move under the constraint of the guide rail 3. A hydraulic cylinder 55 is fixedly mounted on one side of the mounting block 52, with one end extending out of one side of the CNC machine tool 1. The output end of the hydraulic cylinder 55 extends out of one side of the mounting block 52 and is fixedly mounted with a push column 56. The hydraulic cylinder 55 is a... The system is equipped with a tool that can move the push column 56 left and right. The push column 56 and the chuck 2 are on the same center line. A groove 58 is provided on one side of the push column 56. A slider 57 is inserted into the inner cavity of the groove 58. A countersunk bolt 59 is rotatably mounted on the top of the push column 56 through a bearing and is screwed to the slider 57. A crossbar 510 is fixedly mounted on one side of the slider 57. A cutting tool 511 is fixedly mounted on the bottom side of the outer wall of the crossbar 510. By moving the push column 56, the cutting tool 511 is pushed into the barrel for processing. By rotating the countersunk bolt 59 with a tool, the slider 57 can move downward along the groove 58 under the rotational force of the countersunk bolt 59, so as to adjust the distance between the crossbar 510 and the cutting tool 511 and the relative position of the push column 56.

[0024] As a preferred option, the inner cavity of the slide groove 58 is shaped like a dovetail groove, and the slider 57 is fitted and inserted into the slide groove 58 to prevent the slider 57 from disengaging from the inner cavity of the slide groove 58.

[0025] As a preferred option, the slider 57 is further provided with a second locking bolt 512 screwed to both the front and rear ends on one side. The second locking bolt 512 is in close contact with one side of the inner cavity of the slide groove 58. By providing the second locking bolt 512, the adjusted slider 57 can be locked in the slide groove 58, so as to lock and fix the position of the crossbar 510 and the cutting tool 511.

[0026] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0027] Step 1: Clamp and fix the lightweight ZL205A tube to be processed using chuck 2, ensuring that the tube is coaxial with chuck 2. Then adjust the position of the tube support mechanism 4, loosen the first locking bolt 410, and push the first slide block 41 to slide along the guide rail, so that the support mechanism moves to a suitable position under the tube. Tighten the first locking bolt 410 to fix the first slide block 41. Rotate the rotating block 45 to drive the lead screw 44 to rotate. Since the threads on the front and rear sides of the outer wall of the lead screw 44 are set in opposite directions, the lead screw nut 46 moves in the opposite direction along the strip hole 47 under the action of the thread rotation force, thereby driving the U-shaped frame 48 on both sides and the roller 49 to move relative to each other. Adjust the distance between the rollers 49 to match the diameter of the tube. Start the electric push rod 42 to push the cross column to move upward, driving the rollers 49 to rise until the rollers 49 on both sides are tightly attached to the lower wall of the tube, completing the support and fixation of the tube. At this time, the rollers 49 can rotate synchronously with the tube to ensure the stability of the support. Step 2: Rotate the handle 54 to drive the screw 53 to rotate. The screw 53 drives the second slide block 51 to slide along the guide rail 3, thereby driving the mounting block 52 and the rifling machining parts to move as a whole, so that the pusher 56, chuck 2 and barrel are kept on the same center line. With the help of tools, rotate the countersunk bolt 59. The countersunk bolt 59 drives the slider to move up and down along the dovetail groove 58. The slider 57 drives the crossbar 510 and the bore cutter 511 to move synchronously. Adjust the height of the bore cutter 511 to match the machining requirements of the barrel bore. After the adjustment is completed, tighten the second locking bolt 512 to fix the slider 57 in the groove 58 to prevent the position of the bore cutter 511 from shifting during the machining process. Step 3: The CNC machine tool operates according to the preset machining program, driving the chuck 2 and the barrel to rotate at a constant speed. At the same time, the hydraulic cylinder 55 is activated, pushing the pusher 56 towards the barrel, pushing the bore cutter 511 to the designated position inside the barrel. Under the precise control of the CNC machine tool, the bore cutter 511 performs cutting machining on the barrel's inner bore and completes the precision machining of the rifling. During the machining process, the rollers 49 of the barrel support mechanism 4 rotate synchronously with the barrel, continuously providing stable support for the barrel and suppressing barrel swaying. The adjustable rifling machining mechanism 5 remains fixed to ensure the accuracy and consistency of the rifling machining. After machining is completed, the hydraulic cylinder 55 drives the pusher and bore cutter 511 to reset, realizing the precision machining of the inner bore of lightweight ZL205A barrels of different specifications. This not only ensures machining accuracy and stability but also improves machining efficiency and device versatility, adapting to the machining characteristics of ZL205A aluminum alloy.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightweight CNC precision machining device for the inner bore of the ZL205A barrel, characterized in that, include: CNC machine tool (1); A chuck (2) is provided on one side of the CNC machine tool (1); The guide rail (3) is disposed at the bottom of the inner cavity of the CNC machine tool (1); The tube support mechanism (4) is located on one side of the top of the guide rail (3); An adjustable rifling mechanism (5) is located on the other side of the top of the guide rail (3).

2. The lightweight ZL205A barrel bore CNC precision machining device according to claim 1, characterized in that: The body support mechanism (4) includes: The first slide (41) is adapted to be connected to one side of the top end of the guide rail (3); An electric push rod (42) is fixedly mounted on the top of the first slide (41); A horizontal column (43) is fixedly installed at the top of the electric push rod (42) along the front-back direction; The lead screw (44) is rotatably mounted in the inner cavity of the cross column (43) via a bearing in the front-back direction; Rotating block (45), the front end of the lead screw (44) extends out of the front side of the cross column (43) and is fixedly provided with rotating block (45). The top of the crossbar (43) is provided with a strip hole (47), and the front and rear sides of the outer wall of the lead screw (44) are screwed with lead screw nuts (46), and the lead screw nuts (46) extend out of the inner cavity of the strip hole (47). The U-shaped bracket (48) is fixedly installed at the top of the lead screw nut (46); Roller (49) is rotatably mounted on the inside of the U-shaped frame (48).

3. The lightweight ZL205A barrel bore CNC precision machining device according to claim 2, characterized in that: The threads on the front and rear sides of the outer wall of the lead screw (44) are arranged in opposite directions, and the lead screw nut (46) is adapted to be inserted into the strip hole (47).

4. The lightweight ZL205A barrel bore CNC precision machining device according to claim 3, characterized in that: The two rollers (49) are arranged symmetrically with respect to the chuck (2).

5. The lightweight ZL205A barrel bore CNC precision machining device according to claim 4, characterized in that: The outer wall of the roller (49) extends out of the inner side of the U-shaped frame (48).

6. The lightweight ZL205A barrel bore CNC precision machining device according to claim 5, characterized in that: The top left and right sides of the first slide block (41) are screwed with first locking bolts (410), and the first locking bolts (410) are in close contact with the top of the guide rail (3).

7. The lightweight ZL205A barrel bore CNC precision machining device according to claim 1, characterized in that: The adjustable rifling mechanism (5) includes: The second slide (51) is adapted to be connected to the other side of the top of the guide rail (3). The mounting block (52) is fixedly installed on the top of the second slide (51); The screw (53) is rotatably mounted on the inner side of the CNC machine tool (1) via a bearing in the left-right direction, and the screw (53) is screwed to the second slide (51); Rotary handle (54), one end of the screw (53) extends out of one side of the CNC machine tool (1) and is fixedly provided with a rotary handle (54). A hydraulic cylinder (55) is fixedly disposed on one side of the mounting block (52), and one end of the hydraulic cylinder (55) extends out of one side of the CNC machine tool (1); Push column (56), the output end of the hydraulic cylinder (55) extends out of one side of the mounting block (52) and is fixedly provided with push column (56), the push column (56) and the chuck (2) are on the same center line; The slider (57) has a groove (58) on one side of the push column (56), and the slider (57) is inserted into the inner cavity of the groove (58). A countersunk bolt (59) is rotatably mounted on the top of the push column (56) via a bearing, and the countersunk bolt (59) is screwed to the slider (57); A crossbar (510) is fixedly installed on one side of the slider (57); The cutter (511) is fixedly installed on one side of the bottom of the outer wall of the crossbar (510).

8. The lightweight ZL205A barrel bore CNC precision machining device according to claim 7, characterized in that: The inner cavity of the slide groove (58) is dovetail-shaped, and the slider (57) is adapted to be inserted into the slide groove (58).

9. A lightweight ZL205A barrel bore CNC precision machining device according to claim 8, characterized in that: The slider (57) has a second locking bolt (512) screwed at both the front and rear ends on one side, and the second locking bolt (512) is in close contact with one side of the inner cavity of the slide groove (58).

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