Deep hole sleeve finish machining device for numerical control lathe

Abstract

The utility model relates to the technical field of lathe machining, in particular to a deep hole sleeve finish machining device used for a numerical control lathe, a cutter bar is connected in a lathe spindle taper hole of the numerical control lathe through a cutter bar supporting shaft, the cutter bar does not rotate when an inner hole of a deep hole sleeve is machined, and the deep hole sleeve rotates along with a lathe chuck. The broaching tool ring moves back and forth along with a lathe tool rest of the numerical control lathe, the broaching tool ring moves to drive the turning tool installation ring to move back and forth through the broaching tool rod, so that the turning tool moves in an inner hole of the deep hole sleeve, the two ends of the tool rod are stably supported, the mechanism strength of the tool rod is guaranteed, and the machining efficiency is improved. The deep hole sleeve does not need to be turned over during use, the roughness and concentricity of inner hole machining of the deep hole sleeve are guaranteed, the production efficiency is improved, the machining cost is reduced, special inner hole machining devices do not need to be purchased additionally, and the deep hole sleeve inner hole machining device can be applied to an existing numerical control machine tool.

Description

Technical Field

[0001] The utility model relates to the technical field of lathe processing, and specifically relates to a fine machining device for deep-hole sleeves used in a numerical control lathe. Background Technique

[0002] The deep-hole sleeve is a component used in a cold rolling coiler. Its workpiece length is relatively long, generally about 2 meters. The inner hole is required to be concentric with the outer circle, and there should be no chatter marks or tool joint marks on the inner hole surface. When performing fine machining on a lathe, a long inner hole tool bar is clamped to the tool rest for processing. The tool rest cannot bear the weight of the tool bar, and the inner hole cannot be finely machined. If half of the inner hole is finely machined first and then the other half is finely machined after turning around, the lathe needs to be used twice. Moreover, due to the limitation of the inner hole length on the inner hole tool bar, the tool bar is long, with poor rigidity and low strength, resulting in a small cutting depth. During the processing, multiple tool passes are required to complete the processing, leading to low processing efficiency. And turning around for fine machining will result in tool joint marks, inconsistent inner hole dimensions at both ends, and deviation of the central axes at both ends, resulting in defective workpieces. If a special machine is considered for inner hole processing, the processing accuracy is good, but the disadvantage is that it can only process the inner hole and cannot be used for other processing, and the equipment price is high. Content of the Utility Model

[0003] The purpose of the utility model is to provide a fine machining device for deep-hole sleeves used in a numerical control lathe, which solves the problem of insufficient strength of the tool bar, ensures the roughness and concentricity of the inner hole of the sleeve, improves the production efficiency, and reduces the processing cost.

[0004] The utility model discloses a deep hole sleeve finishing device used in a numerically controlled lathe, comprising a tool rod supporting shaft, a tool rod, a broaching ring, a broaching rod and a turning tool mounting ring. The tool rod supporting shaft comprises a tapered column, a stop platform and a supporting column. The stop platform is arranged between the tapered column and the supporting column. The tapered column, the stop platform and the supporting column are coaxial. The outer diameter of the stop platform is larger than the outer diameter of the supporting column. The tapered column is inserted into the tapered hole of the lathe spindle of the numerically controlled lathe. The tool rod is inserted into the supporting column. The end of the tool rod is top-connected to the stop platform. The turning tool mounting ring is slidably sleeved on the outer wall of the tool rod. A turning tool mounting seat is connected to the outer wall of the turning tool mounting ring on one side close to the lathe chuck of the numerically controlled lathe. Two turning tool mounting seats are provided. The two turning tool mounting seats are symmetrical with the axis of the turning tool mounting ring as the center. Turning tools are fixedly connected to the two turning tool mounting seats. A turning tool mounting ring is provided on the outer wall of the turning tool mounting ring on the side away from the lathe chuck of the numerically controlled lathe. Support ear II, two support ears II are provided, and the two support ears II are symmetrical with the axis of the turning tool mounting ring as the center. The broaching ring is slidably sleeved on the outer wall of the tool rod, and a support ear I is provided on the outer wall of the broaching ring. There are two support ears I, and the two support ears I are symmetrical with the axis of the broaching ring as the center. A connecting plate is fixedly connected to the outer wall of one support ear I of the broaching ring. The connecting plate is in an "L" shape, and the connecting plate is fixedly connected to the lathe tool holder of the CNC lathe. There are two broaching rods, and the two broaching rods are respectively fixedly connected to the two support ears I, and the end of the broaching rod away from the broaching ring is fixedly connected to the support ear II; the deep hole sleeve is clamped on the lathe chuck of the CNC lathe, the tool rod, the turning tool mounting ring, the broaching rod and the turning tool are all arranged on the inner side of the deep hole sleeve, the turning tool is turned on the inner wall of the deep hole sleeve, the rear end of the tool rod extends out of the deep hole sleeve, and the broaching ring is connected to the tool rod extending out of the deep hole sleeve.

[0005] Furthermore, the two support ears II are fixedly connected with a stud, and the stud is arranged on the side of the support ear II away from the turning tool mounting seat. The two support ears I are provided with a hole I, and the two studs are coaxial with the two holes I respectively. The inner wall of one end of the broaching rod is provided with an internal thread, and the outer wall of the other end of the broaching rod is provided with an external thread. A stop platform II is fixedly connected to the outer wall of the broaching rod, and the stop platform II is arranged close to the external thread. The internal thread is connected to the stud, and the external thread is inserted into the hole I. After the external thread passes through the hole I, it is connected with a nut, and the support ear I is clamped between the stop platform II and the nut.

[0006] Furthermore, a keyway is provided on the outer wall at the bottom of the tool rod, a guide key is fixedly connected in the keyway, and a slide groove I is provided on the inner wall at the bottom of the turning tool mounting ring, and the slide groove I is slidably connected to the sub-guide key.

[0007] Furthermore, there are multiple guide keys linearly evenly distributed in the keyway, each guide key is connected to the keyway by a countersunk screw, and the guide key is provided with a countersunk hole for the countersunk screw to pass through; and the bottom surface of the keyway is provided with a screw hole for the countersunk screw to connect.

[0008] Further, it also includes a tool bar fixing assembly, which is arranged between the deep hole sleeve and the broach ring. The tool bar fixing assembly includes a fixing seat, an adjusting seat, a pressing plate I and a pressing plate II. The bottom surface of the fixing seat is slidably connected to the lathe guide rail of the CNC lathe. The pressing plate II is connected inside the lathe guide rail of the CNC lathe. The pressing plate II and the fixing seat are clamped on the lathe guide rail of the CNC lathe by bolts. A chute II is provided on the top surface of the fixing seat. A tool bar groove is provided on the top surface of the adjusting seat. The bottom of the tool bar groove is an arc groove. The tool bar is fixedly connected in the tool bar groove. The pressing plate I is fixedly connected to the top surface of the adjusting seat by bolts. Through holes for the bolts to pass through are provided on the pressing plate I. Threaded holes for the bolts to connect are provided on the top surface of the adjusting seat. The tool bar is clamped between the pressing plate I and the tool bar groove. Stopping platforms IV are fixedly connected to both side walls of the lower part of the fixing seat. The lower part of the adjusting seat is slidably connected in the chute II. The two stopping platforms IV are respectively slidably connected to the top surfaces of the fixing seat on both sides of the chute II. A plurality of threaded holes II are provided on each stopping platform IV. Bolts are connected in the plurality of threaded holes II. The front ends of the bolts abut against the top surface of the fixing seat. Two holes II are provided on the adjusting seat, and the two holes II are respectively arranged on both sides of the tool bar groove. Two broach bars are respectively slidably connected in the two holes II.

[0009] Further, a baffle I is fixedly connected to one side of the chute II. A threaded hole I is provided on the baffle I. A shaft hole is fixedly connected to the bottom surface of the adjusting seat. An adjusting bolt is connected in the threaded hole I. The adjusting bolt includes a hexagonal head, a screw rod part and a shaft part. The screw rod part is fixedly connected to one end of the hexagonal head. The shaft part is fixedly connected to the end of the screw rod part away from the hexagonal head. The hexagonal head, the screw rod part and the shaft part are coaxial. The outer diameter of the shaft part < the shaft hole < the outer diameter of the screw rod part. The screw rod part is connected in the threaded hole I. The shaft part is rotatably inserted in the shaft hole. The shaft part passes through the shaft hole. A pin hole V is provided on the shaft part passing through the shaft hole. A pin is inserted in the pin hole V. A gasket is connected to the shaft part passing through the shaft hole. The pin blocks the gasket. The shaft hole is arranged between the screw rod part and the gasket.

[0010] Further, a pressing plane is provided on the top surface of the tool bar. The pressing plate I presses on the pressing plane. A pin hole I is provided on the pressing plane. The pin hole I penetrates through the tool bar. A pin hole IV is provided at the center of the pressing plate I. The pin hole I and the pin hole IV are coaxial. A positioning pin is inserted in the pin hole I and the pin hole IV.

[0011] Further, stopping platforms III are provided on both sides of the bottom of the fixing seat. The stopping platforms III are slidably connected to the lathe guide rail of the CNC lathe. The stopping platforms III and the pressing plate II are connected by bolts. Through holes for the bolts to pass through are provided on the stopping platforms III. Threaded holes for the bolts to connect are provided on the pressing plate II.

[0012] Further, a pulling sleeve is fixedly connected to the tailstock of the CNC lathe. The rear end of the tool bar passes through the broach ring and is inserted into the pulling sleeve. A pin hole III is provided on the pulling sleeve. The pin hole III penetrates through the pulling sleeve. A pin hole II is provided at the rear end part of the tool bar. The pin hole II penetrates through the tool bar. The pin hole III and the pin hole II are coaxial. A connecting pin is inserted in the pin hole III and the pin hole II.

[0013] Further, a measuring hole is provided on the tool shank. The measuring hole is a waist-shaped hole that penetrates the tool shank. There are multiple measuring holes, and the multiple measuring holes are linearly and evenly distributed along the length direction of the tool shank.

[0014] The beneficial effects of the present utility model are as follows: The present utility model forms stable supports at both ends of the tool shank, ensuring the structural strength of the tool shank, thereby ensuring the processing stability of the deep-hole sleeve. When in use, it is not necessary to turn over the deep-hole sleeve, ensuring the processing stability of the deep-hole sleeve, ensuring the roughness and concentricity of the inner hole processing of the deep-hole sleeve, improving production efficiency, reducing processing costs, eliminating the need to purchase special inner hole processing equipment separately, and being applicable to existing numerically controlled machine tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a sectional view of the present utility model;

[0017] Figure 3 is the present utility model Figure 2 A-A sectional view;

[0018] Figure 4 is a schematic structural diagram of the tool shank fixing assembly of the present utility model;

[0019] Figure 5 is a schematic structural diagram of the adjusting seat and the pressing plate of the present utility model;

[0020] Figure 6 is a schematic structural diagram of the fixing seat of the present utility model;

[0021] Figure 7 is a partial structural diagram of the adjusting bolt of the present utility model;

[0022] Figure 8 is a schematic structural diagram of the adjusting bolt of the present utility model;

[0023] Figure 9 is a schematic structural diagram of the tool shank of the present utility model;

[0024] Figure 10 is the present utility model Figure 9 B-B sectional view;

[0025] Figure 11 is the present utility model Figure 9 C-C sectional view;

[0026] Figure 12 is the present utility model Figure 9 D-D sectional view;

[0027] Figure 13 This is a schematic structural view of the broach bar of the present utility model;

[0028] Figure 14 This is a schematic structural view of the tool bit mounting ring of the present utility model;

[0029] Figure 15 This is the present utility model Figure 14 view from direction E;

[0030] Figure 16 This is the present utility model Figure 14 view from direction F;

[0031] Figure 17 This is a schematic structural view of the broach ring of the present utility model;

[0032] Figure 18 This is the present utility model Figure 17 view from direction G;

[0033] Figure 19 This is a schematic structural view of the tool bar support shaft of the present utility model.

[0034] In the figure: 1. CNC lathe; 2. deep hole sleeve; 3. tool bar support shaft; 301. tapered column; 302. stop block Ⅰ; 303. support column; 4. tool bar; 401. press joint plane; 402. pin hole Ⅰ; 403. pin hole Ⅱ; 404. measurement hole; 405. keyway; 5. guide key; 6. pull sleeve; 601. pin hole Ⅲ; 7. connecting pin; 8. broach ring; 801. ear Ⅰ; 802. hole Ⅰ; 803. connecting plate; 9. broach bar; 901. internal thread; 902. external thread; 903. stop block Ⅱ; 10. tool bit mounting ring; 1001. ear Ⅱ; 1002. stud; 1003. tool bit mounting seat; 1004. chute Ⅰ; 11. tool bar fixing assembly; 12. fixing seat; 1201. chute Ⅱ; 1202. baffle Ⅰ; 1203. threaded hole Ⅰ; 1204. stop block Ⅲ; 13. adjusting seat; 1301. stop block Ⅳ; 1302. tool bar groove; 1303. hole Ⅱ; 1304. threaded hole Ⅱ; 1305. baffle Ⅱ; 1306. shaft hole; 14. pressing plate Ⅰ; 1401. pin hole Ⅳ; 15. pressing plate Ⅱ; 16. positioning pin; 17. steady rest; 18. adjusting bolt; 1801. hexagonal head; 1802. screw rod part; 1803. shaft part; 1804. pin hole Ⅴ; 19. gasket; 20. pin; 21. tool bit. Detailed implementation manners

[0035] As Figures 1-19As shown in the figure, a fine machining device for deep-hole sleeves used in a numerically controlled lathe of the present utility model includes a tool bar support shaft 3, a tool bar 4, a broaching ring 8, a broaching bar 9, and a tool bit mounting ring 10. The tool bar support shaft 3 includes a tapered column 301, a retaining table 302, and a support column 303. The retaining table 302 is arranged between the tapered column 301 and the support column 303. The tapered column 301, the retaining table 302, and the support column 303 are coaxial. The outer diameter of the retaining table 302 is greater than the outer diameter of the support column 303. The tapered column 301 is inserted into the tapered hole of the lathe spindle of the numerically controlled lathe 1. The tool bar 4 is inserted onto the support column 303, and the end of the tool bar 4 abuts against the retaining table 302. The tool bit mounting ring 10 is slidably sleeved on the outer wall of the tool bar 4. On the outer wall of one side of the tool bit mounting ring 10 close to the lathe chuck of the numerically controlled lathe 1, there are two tool bit mounting seats 1003 connected. The two tool bit mounting seats 1003 are symmetric about the axis of the tool bit mounting ring 10. Two tool bits 21 are fixedly connected to the two tool bit mounting seats 1003 respectively. On the outer wall of the side of the tool bit mounting ring 10 away from the lathe chuck of the numerically controlled lathe 1, there are two ear plates II 1001. The two ear plates II 1001 are symmetric about the axis of the tool bit mounting ring 10. The broaching ring 8 is slidably sleeved on the outer wall of the tool bar 4. On the outer wall of the broaching ring 8, there are two ear plates I 801. The two ear plates I 801 are symmetric about the axis of the broaching ring 8. On the outer wall of one ear plate I 801 of the broaching ring 8, a connecting plate 803 is fixedly connected. The shape of the connecting plate 803 is "L". The connecting plate 803 is fixedly connected to the lathe tool rest of the numerically controlled lathe 1. There are two broaching bars 9, and the two broaching bars 9 are respectively fixedly connected to the two ear plates I 801. The end of the broaching bar 9 away from the broaching ring 8 is fixedly connected to the ear plate II 1001. The deep-hole sleeve 2 is clamped on the lathe chuck of the numerically controlled lathe 1. The tool bar 4, the tool bit mounting ring 10, the broaching bar 9, and the tool bit 21 are all arranged inside the deep-hole sleeve 2. The tool bit 21 machines the inner wall of the deep-hole sleeve 2. The rear end of the tool bar 4 extends out of the deep-hole sleeve 2, and the broaching ring 8 is connected to the tool bar 4 extending out of the deep-hole sleeve 2. Two stud bolts 1002 are fixedly connected to the two ear plates II 1001 respectively. The stud bolts 1002 are arranged on the side of the ear plate II 1001 facing away from the tool bit mounting seat 1003. There are holes I 802 on the two ear plates I 801 respectively. The two stud bolts 1002 are coaxial with the two holes I 802 respectively. Internal threads 901 are provided on the inner wall of one end of each broaching bar 9, and external threads 902 are provided on the outer wall of the other end of the broaching bar 9. A retaining table II 903 is fixedly connected to the outer wall of the broaching bar 9. The retaining table II 903 is arranged close to the external thread 902. The internal thread 901 is connected to the stud bolt 1002, and the external thread 902 is inserted into the hole I 802. After the external thread 902 passes through the hole I 802, it is connected with a nut. The ear plate I 801 is clamped between the retaining table II 903 and the nut. A keyway 405 is provided on the outer wall of the bottom of the tool bar 4, and a guiding key 5 is fixedly connected in the keyway 405. A chute I 1004 is provided on the inner wall of the bottom of the tool bit mounting ring 10, and the chute I 1004 is slidably connected to the guiding key 5.There are multiple guiding keys 5 linearly and evenly distributed in the keyway 405. Each guiding key 5 is connected to the keyway 405 by a countersunk head screw. The guiding key 5 is provided with a countersunk hole for the countersunk head screw to pass through; on the bottom surface of the keyway 405, there is a threaded hole for connecting the countersunk head screw. The tool shank 4 is provided with measuring holes 404. The measuring holes 404 are waist-shaped holes, and the measuring holes 404 penetrate through the tool shank 4. There are multiple measuring holes 404, and the multiple measuring holes 404 are linearly and evenly distributed along the length direction of the tool shank 4.

[0036] The tool shank 4 of the present utility model is connected to the taper hole of the lathe spindle of the numerical control lathe 1 through the tool shank support shaft 3. When machining the inner hole of the deep-hole sleeve 2, the tool shank 4 does not rotate, and the deep-hole sleeve 2 rotates together with the lathe chuck of the numerical control lathe 1. When machining the inner hole of the deep-hole sleeve 2, the broaching ring 8 moves back and forth together with the lathe tool post of the numerical control lathe 1. The movement of the broaching ring 8 drives the tool mounting ring 10 to move back and forth through the broaching rod 9, so as to realize the movement of the turning tool 21 in the inner hole of the deep-hole sleeve 2. The tool shank 4 provides a supporting function for the back-and-forth movement of the broaching ring 8 and the tool mounting ring 10. The tool mounting ring 10 drives the turning tool 21 to be able to realize the overall machining from start to end inside the deep-hole sleeve 2, without having to turn over the deep-hole sleeve 2 for separate machining from both ends, ensuring the machining accuracy of the inner hole of the deep-hole sleeve 2.

[0037] The setting of the guiding key 5 and the chute Ⅰ 1004 ensures the movement stability of the tool mounting ring 10.

[0038] The measuring holes 404 are arranged to measure the tool shank 4, so as to ensure that the tool shank 4 is coaxial with the spindle axis of the numerical control lathe 1. Generally, a dial indicator is used to align the tool shank 4 during use.

[0039] However, since the length of the deep-hole sleeve 2 is generally about 2 meters, and the length of the tool shank 4 has to exceed the length of the deep-hole sleeve 2, the tool shank 4 also has a relatively long length. The strength of the end of the tool shank 4 extending out of the deep-hole sleeve 2 is relatively low, which is likely to affect the machining accuracy. The broaching ring 8 can form a certain support for the end extending out of the deep-hole sleeve 2, but since the broaching ring 8 moves back and forth, the support of the broaching ring 8 for the tool shank 4 is not stable.

[0040] To solve the problem of the support of the tool bar 4, the utility model further includes a tool bar fixing assembly 11. The tool bar fixing assembly 11 is arranged between the deep hole sleeve 2 and the broach ring 8. The tool bar fixing assembly 11 includes a fixing seat 12, an adjusting seat 13, a pressing plate Ⅰ 14 and a pressing plate Ⅱ 15. The bottom surface of the fixing seat 12 is slidably connected to the lathe guide rail of the numerical control lathe 1. The pressing plate Ⅱ 15 is connected inside the lathe guide rail of the numerical control lathe 1. The pressing plate Ⅱ 15 and the fixing seat 12 are clamped on the lathe guide rail of the numerical control lathe 1 by bolts. A chute Ⅱ 1201 is provided on the top surface of the fixing seat 12. A tool bar groove 1302 is provided on the top surface of the adjusting seat 13. The bottom of the tool bar groove 1302 is an arc groove. The tool bar 4 is fixedly connected in the tool bar groove 1302. The pressing plate Ⅰ 14 is fixedly connected to the top surface of the adjusting seat 13 by bolts. Through holes for the bolts to pass through are provided on the pressing plate Ⅰ 14. Threaded holes for the bolts to connect are provided on the top surface of the adjusting seat 13. The tool bar 4 is clamped between the pressing plate Ⅰ 14 and the tool bar groove 1302. Stopping platforms Ⅳ 1301 are fixedly connected to both side walls of the lower part of the fixing seat 12. The lower part of the adjusting seat 13 is slidably connected in the chute Ⅱ 1201. The two stopping platforms Ⅳ 1301 are respectively slidably connected to the top surfaces of the fixing seat 12 on both sides of the chute Ⅱ 1201. A plurality of threaded holes Ⅱ 1304 are provided on each stopping platform Ⅳ 1301. Bolts are connected in the plurality of threaded holes Ⅱ 1304. The front ends of the bolts abut against the top surface of the fixing seat 12. Two holes Ⅱ 1303 are provided on the adjusting seat 13. The two holes Ⅱ 1303 are respectively arranged on both sides of the tool bar groove 1302. The two broach bars 9 are respectively slidably connected in the two holes Ⅱ 1303; A baffle Ⅰ 1202 is fixedly connected to one side of the chute Ⅱ 1201. A threaded hole Ⅰ 1203 is provided on the baffle Ⅰ 1202. A shaft hole 1306 is fixedly connected to the bottom surface of the adjusting seat 13 described above. An adjusting bolt 18 is connected in the threaded hole Ⅰ 1203. The adjusting bolt 18 includes a hexagonal head 1801, a screw rod part 1802 and a shaft part 1803. The screw rod part 1802 is fixedly connected to one end of the hexagonal head 1801. The shaft part 1803 is fixedly connected to the end of the screw rod part 1802 far from the hexagonal head 1801. The hexagonal head 1801, the screw rod part 1802 and the shaft part 1803 are coaxial. The outer diameter of the shaft part 1803 < the shaft hole 1306 < the outer diameter of the screw rod part 1802. The screw rod part 1802 is connected in the threaded hole Ⅰ 1203. The shaft part 1803 is rotatably inserted in the shaft hole 1306. The shaft part 1803 passes through the shaft hole 1306. A pin hole Ⅴ 1804 is provided on the shaft part 1803 passing through the shaft hole 1306. A pin 20 is inserted in the pin hole Ⅴ 1804. A gasket 19 is connected to the shaft part 1803 passing through the shaft hole 1306. The pin 20 blocks the gasket 19. The shaft hole 1306 is arranged between the screw rod part 1802 and the gasket 19;The top surface of the tool shank 4 is provided with a pressing plane 401. The pressing plate I 14 is pressed on the pressing plane 401. The pressing plane 401 is provided with a pin hole I 402 which penetrates through the tool shank 4. The center of the pressing plate I 14 is provided with a pin hole IV 1401. The pin hole I 402 and the pin hole IV 1401 are coaxial. A positioning pin 16 is inserted into the pin hole I 402 and the pin hole IV 1401. On both sides of the bottom of the fixed seat 12, there are provided retaining platforms III 1204 which are slidably connected to the lathe guide rail of the CNC lathe 1. The retaining platforms III 1204 are connected to the pressing plate II 15 by bolts. The retaining platforms III 1204 are provided with through holes for the bolts to pass through, and the pressing plate II 15 is provided with threaded holes for the bolts to be connected.

[0041] Through the setting of the tool shank fixing assembly 11, a stable support is formed for the tool shank 4, and at the same time, it does not affect the movement of the broach ring 8 and the broach rod 9.

[0042] The fixed seat 12 moves on the lathe guide rail of the CNC lathe 1 to change the support position, so as to adapt to deep hole sleeves 2 and tool shanks 4 of different lengths. After the position of the fixed seat 12 is determined, the fixed seat 12 is stably connected to the lathe guide rail of the CNC lathe 1 through the connection between the fixed seat 12 and the pressing plate II 15. The adjusting seat 13 is used to support the tool shank 4, and at the same time, the adjusting seat 13 functions to adjust the axis of the tool shank 4, so as to ensure that the tool shank 4 is coaxial with the spindle axis of the CNC lathe 1 during processing. When adjusting the axis, first loosen the bolt in the threaded hole II 1304, and then rotate the adjusting bolt 18. The adjusting bolt 18 drives the adjusting seat 13 to slide in the chute II. The sliding of the adjusting seat 13 drives the tool shank 4 to move, so as to achieve the purpose of adjusting the axis of the tool shank 4. Due to the setting of the shaft part 1803, the pin hole V 1804, the gasket 19 and the pin 20, the shaft part 1803 can rotate in the shaft hole 1306 and drive the adjusting seat 13 to move.

[0043] The pressing of the pressing plate I 14 in the pressing plane 401 and the setting of the positioning pin 16 both ensure the connection stability between the adjusting seat 13 and the tool shank 4.

[0044] A pulling sleeve 6 is fixedly connected to the tailstock of the CNC lathe 1. The rear end of the tool shank 4 passes through the broach ring 8 and is inserted into the pulling sleeve 6. The pulling sleeve 6 is provided with a pin hole III 601 which penetrates through the pulling sleeve 6. The rear end part of the tool shank 4 is provided with a pin hole II 403 which penetrates through the tool shank 4. The pin hole III 601 and the pin hole II 403 are coaxial. A connecting pin 7 is inserted into the pin hole III 601 and the pin hole II 403.

[0045] The setting of the pulling sleeve 6 plays a role in supporting the tool shank 4 on the one hand, and on the other hand, the pulling sleeve 6 can drive the tool shank 4 to move, so as to drive the tool shank 4 to be removed after the processing is completed.

[0046] When the utility model is in use, the steady rest 17 of the CNC lathe 1 can also be arranged on the side of the deep hole sleeve 2 away from the CNC lathe 1, so as to ensure the stability of the deep hole sleeve 2.

Claims

1. A fine machining device for deep-hole sleeves used in a numerically controlled lathe, characterized in that: It includes a tool bar support shaft (3), a tool bar (4), a broaching ring (8), a broaching bar (9) and a tool bit mounting ring (10). The tool bar support shaft (3) includes a tapered column (301), a retaining platform (302) and a support column (303). The retaining platform (302) is arranged between the tapered column (301) and the support column (303). The tapered column (301), the retaining platform (302) and the support column (303) are coaxial. The outer diameter of the retaining platform (302) is larger than that of the support column (303). The tapered column (301) is inserted into the tapered hole of the lathe spindle of the CNC lathe (1). The tool bar (4) is inserted onto the support column (303). The end of the tool bar (4) abuts against the retaining platform (302). The tool bit mounting ring (10) is slidably sleeved on the outer wall of the tool bar (4). On the outer wall of the tool bit mounting ring (10) close to the lathe chuck of the CNC lathe (1), there are two tool bit mounting seats (1003). The two tool bit mounting seats (1003) are symmetric about the axis of the tool bit mounting ring (10). Two tool bits (21) are fixedly connected to the two tool bit mounting seats (1003) respectively. On the outer wall of the tool bit mounting ring (10) away from the lathe chuck of the CNC lathe (1), there are two second lugs (1001). The two second lugs (1001) are symmetric about the axis of the tool bit mounting ring (10). The broaching ring (8) is slidably sleeved on the outer wall of the tool bar (4). On the outer wall of the broaching ring (8), there are two first lugs (801). The two first lugs (801) are symmetric about the axis of the broaching ring (8). On the outer wall of one of the first lugs (801) of the broaching ring (8), a connecting plate (803) is fixedly connected. The shape of the connecting plate (803) is "L". The connecting plate (803) is fixedly connected to the lathe tool post of the CNC lathe (1). There are two broaching bars (9). The two broaching bars (9) are respectively fixedly connected to the two first lugs (801). The end of the broaching bar (9) away from the broaching ring (8) is fixedly connected to the second lug (1001). The deep hole sleeve (2) is clamped on the lathe chuck of the CNC lathe (1). The tool bar (4), the tool bit mounting ring (10), the broaching bar (9) and the tool bit (21) are all arranged inside the deep hole sleeve (2). The tool bit (21) machines the inner wall of the deep hole sleeve (2). The rear end of the tool bar (4) extends out of the deep hole sleeve (2). The broaching ring (8) is connected to the tool bar (4) extending out of the deep hole sleeve (2).

2. The finishing device for deep-hole sleeves used in a numerically controlled lathe according to claim 1, wherein: Both of the two second lugs (1001) are fixedly connected with studs (1002). The studs (1002) are arranged on the side of the second lugs (1001) facing away from the tool bit mounting seat (1003). Each of the two first lugs (801) is provided with a first hole (802). The two studs (1002) are respectively coaxial with the two first holes (802). Internal threads (901) are provided on the inner wall at one end of the broach bar (9), and external threads (902) are provided on the outer wall at the other end of the broach bar (9). A second retaining platform (903) is fixedly connected to the outer wall of the broach bar (9). The second retaining platform (903) is arranged close to the external threads (902). The internal threads (901) are connected to the studs (1002), and the external threads (902) are inserted into the first holes (802). After the external threads (902) pass through the first holes (802), nuts are connected. The first lugs (801) are clamped between the second retaining platform (903) and the nuts.

3. The finishing device for deep-hole sleeves used in a numerically controlled lathe according to claim 1, wherein: A keyway (405) is provided on the outer wall at the bottom of the tool bar (4). A guiding key (5) is fixedly connected in the keyway (405). A first sliding groove (1004) is provided on the inner wall at the bottom of the tool bit mounting ring (10). The first sliding groove (1004) is slidably connected to the guiding key (5).

4. The finish machining device for deep-hole sleeves used in a numerically controlled lathe according to claim 3, wherein: A plurality of the guiding keys (5) are linearly and evenly distributed in the keyway (405). Each guiding key (5) is connected to the keyway (405) by a countersunk head screw. A countersunk head hole for the countersunk head screw to pass through is provided on the guiding key (5); a screw hole for connecting the countersunk head screw is provided on the bottom surface of the keyway (405).

5. A fine machining device for deep-hole sleeves used in a numerically controlled lathe according to any one of claims 1-4, characterized in that: It further includes a tool bar fixing assembly (11). The tool bar fixing assembly (11) is arranged between the deep hole sleeve (2) and the broach ring (8). The tool bar fixing assembly (11) includes a fixing seat (12), an adjusting seat (13), a pressing plate I (14) and a pressing plate II (15). The bottom surface of the fixing seat (12) is slidably connected to the lathe guide rail of the CNC lathe (1). The pressing plate II (15) is connected inside the lathe guide rail of the CNC lathe (1). The pressing plate II (15) and the fixing seat (12) are clamped on the lathe guide rail of the CNC lathe (1) by bolts. A chute II (1201) is provided on the top surface of the fixing seat (12). A tool bar groove (1302) is provided on the top surface of the adjusting seat (13). The bottom of the tool bar groove (1302) is an arc groove. The tool bar (4) is fixedly connected in the tool bar groove (1302). The pressing plate I (14) is fixedly connected to the top surface of the adjusting seat (13) by bolts. Through holes for the bolts to pass through are provided on the pressing plate I (14). Screw holes for bolt connection are provided on the top surface of the adjusting seat (13). The tool bar (4) is clamped between the pressing plate I (14) and the tool bar groove (1302). Stopping platforms IV (1301) are fixedly connected to both side walls of the lower part of the fixing seat (12). The lower part of the adjusting seat (13) is slidably connected in the chute II (1201). The two stopping platforms IV (1301) are respectively slidably connected to the top surfaces of the fixing seat (12) on both sides of the chute II (1201). A plurality of screw holes II (1304) are provided on each stopping platform IV (1301). Bolts are connected in the plurality of screw holes II (1304). The front ends of the bolts abut against the top surface of the fixing seat (12). Two holes II (1303) are provided on the adjusting seat (13). The two holes II (1303) are respectively arranged on both sides of the tool bar groove (1302). The two broach bars (9) are respectively slidably connected in the two holes II (1303).

6. The finishing device for deep-hole sleeves used in a numerically controlled lathe according to claim 5, characterized in that: One side of the described chute II (1201) is fixedly connected with a baffle I (1202). A threaded hole I (1203) is provided on the baffle I (1202). A shaft hole (1306) is fixedly connected to the bottom surface of the described adjusting seat (13). An adjusting bolt (18) is connected in the threaded hole I (1203). The adjusting bolt (18) includes a hexagonal head (1801), a screw rod part (1802) and a shaft part (1803). The screw rod part (1802) is fixedly connected to one end of the hexagonal head (1801). The shaft part (1803) is fixedly connected to the end of the screw rod part (1802) far from the hexagonal head (1801). The hexagonal head (1801), the screw rod part (1802) and the shaft part (1803) are coaxial. The outer diameter of the shaft part (1803) < the shaft hole (1306) < the outer diameter of the screw rod part (1802). The screw rod part (1802) is connected in the threaded hole I (1203). The shaft part (1803) is rotatably inserted into the shaft hole (1306). The shaft part (1803) passes through the shaft hole (1306). A pin hole V (1804) is provided on the shaft part (1803) passing through the shaft hole (1306). A pin (20) is inserted into the pin hole V (1804). A gasket (19) is connected to the shaft part (1803) passing through the shaft hole (1306). The pin (20) blocks the gasket (19). The shaft hole (1306) is provided between the screw rod part (1802) and the gasket (19).

7. The finishing device for deep-hole sleeves used in a numerically controlled lathe according to claim 6, characterized in that: A pressing plane (401) is provided on the top surface of the described tool bar (4). The pressing plate I (14) is pressed against the pressing plane (401). A pin hole I (402) is provided on the pressing plane (401). The pin hole I (402) penetrates through the tool bar (4). A pin hole IV (1401) is provided at the center of the pressing plate I (14). The pin hole I (402) and the pin hole IV (1401) are coaxial. A positioning pin (16) is inserted into the pin hole I (402) and the pin hole IV (1401).

8. A finishing device for deep-hole sleeves used in a numerically controlled lathe according to claim 7, characterized in that: Both sides of the bottom of the described fixed seat (12) are provided with retaining platforms III (1204). The retaining platforms III (1204) are slidably connected to the lathe guide rails of the CNC lathe (1). The retaining platforms III (1204) and the pressing plate II (15) are connected by bolts. Through holes for the bolts to pass through are provided on the retaining platforms III (1204). Threaded holes for bolt connection are provided on the pressing plate II (15).

9. A fine machining device for deep-hole sleeves used in a numerically controlled lathe according to claim 1, 2, 3, 4, 6, 7 or 8, characterized in that: A pulling sleeve (6) is fixedly connected to the tailstock of the described CNC lathe (1). The rear end of the tool bar (4) passes through the broaching ring (8) and is inserted into the pulling sleeve (6). A pin hole III (601) is provided on the pulling sleeve (6). The pin hole III (601) penetrates through the pulling sleeve (6). A pin hole II (403) is provided at the rear end of the tool bar (4). The pin hole II (403) penetrates through the tool bar (4). The pin hole III (601) and the pin hole II (403) are coaxial. A connecting pin (7) is inserted into the pin hole III (601) and the pin hole II (403).

10. The finish machining device for deep-hole sleeve used in a numerically controlled lathe according to claim 9, characterized in that: A measuring hole (404) is provided on the tool bar (4). The measuring hole (404) is a waist-shaped hole. The measuring hole (404) penetrates through the tool bar (4). A plurality of measuring holes (404) are provided. The plurality of measuring holes (404) are linearly distributed along the length direction of the tool bar (4).

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