Numerically controlled lathe for machining mechanical parts

Abstract

The invention discloses a numerical control lathe for machining of mechanical parts, and relates to the technical field of machining of mechanical parts, the numerical control lathe comprises a machine tool, and an adjusting device, a length control device and a cutting device are arranged above the machine tool; through the arrangement of the adjusting device, a long-strip-shaped workpiece is placed on the inner wall of a placing wheel, a lead screw is rotated to drive a limiting wheel to move, the height of the workpiece is adjusted and then fixed, rotation of the lead screw is limited through cooperation of a clamping block and a limiting groove, and the lead screw is prevented from being mistakenly touched by external force and rotating; the limiting wheel is matched with an inserting block, a hollow block and a first spring so that the position of the limiting wheel can be fixed, a pressing bolt is matched with a T-shaped block, the hollow block, a U-shaped block, the first spring, the inserting block and a butt-joint groove so that the limiting wheel can freely move, and in the production process, the limiting wheel can move freely. And adjustment is carried out according to different design or production requirements so as to adapt to the size of a workpiece, and higher flexibility is provided.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical parts processing, in particular to a numerically controlled lathe for mechanical parts processing. Background Art

[0002] CNC lathes are an indispensable and important equipment in the field of modern mechanical processing and are widely used in the processing of mechanical parts. Its background technology covers many aspects, including CNC technology, machine tool structure, processing technology, and its application in different industrial fields.

[0003] The patent with patent announcement number CN213888723U relates to the technical field of mechanical parts processing. The patent provides a CNC lathe for mechanical parts processing, which belongs to the technical field of CNC machine tools for mechanical parts processing. The CNC lathe for mechanical parts processing includes a body, the upper end of the body is fixedly connected to a casing, the front end of the casing is fixedly connected to a control end, the upper side of the front end of the control end is fixedly connected to a control panel, the front end of the control end is fixedly connected to a setting panel, the right end of the control end is fixedly connected to a laser cutting control end, the front end of the laser cutting control end is fixedly connected to a laser cutting control panel and a workbench, and the rear end of the laser cutting control end is fixedly connected to the front end of the casing. The device improves the original cutting device and uses laser cutting instead of the original tool cutting. When a problem occurs with the device, it is safer to repair than the original tool device and is not prone to dangerous problems such as scratches. The laser cutting of the device is equipped with a cooling device, and the cooling device is distilled water, which makes the life of the device longer. In the above patent, the device improves the original cutting device and uses laser cutting instead of the original tool cutting. However, the current measuring equipment has the following problems: if the sizes of different workpieces cannot be adjusted in time, more adjustment and processing time may be required, resulting in an extension of the production cycle. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a CNC lathe for machining mechanical parts, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a CNC lathe for machining mechanical parts, comprising a machine tool, wherein an adjusting device, a fixing length device and a cutting device are arranged above the machine tool; wherein the adjusting device comprises a fixed frame, a placing wheel, a limiting wheel, a screw rod, a limiting rod, a blocking block, a hollow block, an insert block, a U-shaped block, a No. 1 spring, a T-shaped block and a latch, wherein the fixed frame is fixedly mounted on the top of the machine tool, the placing wheel is rotatably mounted on the inner wall of the fixed frame, the limiting wheel is slidably mounted on the inner wall of the fixed frame, one side of the screw rod is fixedly mounted on the top of the limiting wheel, and the other side of the screw rod slides through the inner and outer walls of the fixed frame, the limiting rod is rotatably mounted on the top of the screw rod, and the blocking block is slidably mounted on the outer wall of the limiting rod, a long workpiece is placed on the inner wall of the placing wheel, the spiral groove is driven to rotate by rotating the screw rod, the spiral groove rotates so that the screw rod moves linearly, and the movement of the screw rod drives the limiting wheel to move, so that the height of the workpiece is adjusted and then fixed, and when the rotation of the screw rod is stopped, the blocking block is clamped into the limiting groove to achieve The rotation of the screw rod is restricted, the hollow block is fixedly penetrated through the inner and outer walls of the fixed frame, the plug block is slidably installed on the inner wall of the hollow block, the U-shaped block is slidably installed on the inner wall of the hollow block, the No. 1 spring is arranged between the plug block and the U-shaped block, one side of the T-shaped block is slidably installed on the inner wall of the hollow block, the other side of the T-shaped block is fixedly installed on the inner wall of the U-shaped block, the latch slides through the inner and outer walls of the hollow block, and the outer wall of the limiting wheel contacts the inclined surface of the plug block through the movement of the limiting wheel, so that the plug block moves along the inner wall of the hollow block The movement of the plug block will compress spring No. 1. When the docking slot and the plug block are at the same level, spring No. 1 is released and drives the plug block to reset and insert into the docking slot. At this time, the position of the limit wheel is fixed. By pressing the latch, it contacts the inclined surface of the T-shaped block, so that the T-shaped block moves along the inner wall of the hollow block. The movement of the T-shaped block drives the movement of the U-shaped block. The movement of the U-shaped block will stretch spring No. 1. When spring No. 1 is stretched to a certain extent, it will pull the plug block to move, and the movement of the plug block will be out of the docking slot. At this time, the limit wheel can move freely.

[0006] According to the above technical solution, a limiting groove is provided on the top of the screw rod, a docking groove is provided on the front side of the limiting wheel, a spiral groove is provided on the circumferential surface of the screw rod, and the spiral groove is threadedly connected to the fixed frame. The spiral groove is rotated by rotating the screw rod, and the rotation of the spiral groove causes the screw rod to move linearly. The bottom of the plug block is set as an inclined surface, a No. 2 spring is provided between the T-shaped block and the hollow block, and a No. 3 spring is provided between the pin and the hollow block. The No. 2 spring is used to reset the T-shaped block, and the No. 3 spring is used to reset the pin.

[0007] According to the above technical scheme, the fixed length device includes a fixed frame, a slide frame, a slider, a rotating rod and a push rod. The fixed frame is fixedly installed on the top of the machine tool, the slide frame is fixedly installed on the top of the machine tool, the slider is slidably installed on the inner wall of the slide frame, the rotating rod is rotatably installed on the right side of the slider, and the push rod is fixedly installed on the right side of the rotating rod. A No. 1 torsion spring is arranged between the rotating rod and the slider, and a card groove is opened on the inner wall of the slide frame. The workpiece will pass through the inner wall of the fixed frame until it contacts the rotating rod to cause the rotating rod to rotate. The rotation of the rotating rod drives the push rod to move, and the position of the push rod can be adjusted by installing bolts and nuts.

[0008] According to the above technical scheme, the fixed length device also includes a bolt, a nut, an auxiliary seat, a limit angle, a round rod, a stop block and a No. 4 spring. The bolt is fixedly installed inside the push rod, the nut is threadedly installed on the threaded surface of the bolt, an installation groove is opened on the inner wall of the nut, the auxiliary seat is sleeved on the left side of the nut, the limit angle is fixedly installed on the inner wall of the installation groove, the bottom of the limit angle is set as an inclined surface, the round rod slides through the inner and outer walls of the auxiliary seat, the stop block is fixedly installed on the top of the round rod, and the No. 4 spring is arranged between the auxiliary seat and the stop block. Due to the frequent rotation of the rotating rod, the nut may become loose under long-term movement. The movement of the nut drives the auxiliary seat to move, and the inclined surface of the stop block contacts the limit angle, so that the stop block moves downward and compresses the No. 4 spring. At this time, the stop block is free from the restriction of the limit angle. Only then can the nut and the bolt be threadedly connected normally. When the nut is loose, the non-inclined surface of the limit angle contacts the non-inclined surface of the stop block, so that the nut cannot be reversed.

[0009] According to the above technical solution, the length-fixing device also includes an L-shaped block, a fixing rod and a No. 5 spring. One side of the L-shaped block is slidably mounted on the inner wall of the slider, the fixing rod is fixedly mounted on the inner wall of the slider, and the other side of the L-shaped block is slidably mounted on the circumferential surface of the fixing rod. The No. 5 spring is arranged between the L-shaped block and the slider. The length of the workpiece cut is fixed by moving the position of the slider. When adjustment is required, the No. 5 spring is compressed by moving the L-shaped block downward so that the L-shaped block is disengaged from the slot. At this time, the slider can be freely moved to the position where adjustment is required.

[0010] According to the above technical solution, the fixed-length device also includes a receiving rod, a hollow cylinder, a No. 6 spring and a brake block. The receiving rod is fixedly installed on the top of the fixed frame, the hollow cylinder is slidably installed on the circumferential surface of the receiving rod, the No. 6 spring is arranged between the hollow cylinder and the receiving rod, and the brake block is fixedly installed on the circumferential surface of the hollow cylinder. The push rod moves to contact the brake block so that the brake block moves to the bottom of the pressure plate, and the pressure plate contacts the brake block so that the brake block moves downward. The movement of the brake block drives the hollow cylinder to move downward, and the movement of the hollow cylinder compresses the No. 6 spring.

[0011] According to the above technical solution, the cutting device includes a long block, a rotating motor, a knob, a connecting rod, a slide block and a pressure plate. The long block is fixedly installed on the top of the machine tool, the fixed end of the rotating motor is fixedly installed on the right side of the long block, the knob is fixedly installed on the output end of the rotating motor, the connecting rod is fixedly installed on the left side of the knob, the slide block is fixedly installed on the left side of the long block, and the pressure plate is slidably installed on the inner wall of the slide block. The rotation of the rotating motor drives the knob to rotate, and the rotation of the knob drives the connecting rod to move back and forth in a straight line. The movement of the connecting rod drives the pressure plate to move along the inner wall of the slide block.

[0012] According to the above technical solution, the cutting device also includes a cylinder, a sliding column, a No. 7 spring, a receiving block, a rotating motor 2 and a cutting blade. The cylinder is fixedly installed on the top of the fixed frame, the sliding column is slidably installed on the inner wall of the cylinder, the receiving block is fixedly installed on the top of the sliding column, the No. 7 spring is arranged between the receiving block and the cylinder, the fixed end of the rotating motor 2 is fixedly installed on the rear side of the receiving block, the cutting blade is rotatably installed on the inner wall of the receiving block, the output end of the rotating motor 2 is connected to the cutting blade through a No. 1 belt, the rotating motor 2 rotates and drives the cutting blade to rotate through the No. 1 belt, the brake block moves downward and contacts with the receiving block, causing the receiving block to move downward, the movement of the receiving block drives the cutting blade to move and compresses the No. 7 spring at the same time, thereby realizing cutting of the workpiece.

[0013] The present invention provides a CNC lathe for machining mechanical parts. It has the following beneficial effects: (1) The invention places a long workpiece on the inner wall of the placement wheel by setting an adjustment device, and drives the limit wheel to move by rotating the lead screw to adjust the height of the workpiece and then fix it. The rotation of the lead screw is limited by the positioning block in conjunction with the limit groove to prevent the lead screw from being accidentally touched by external force and causing rotation, thereby affecting the fixation of the workpiece. The position of the limit wheel is fixed by the limit wheel in conjunction with the plug block, hollow block and No. 1 spring. The limit wheel can move freely by pressing the pin in conjunction with the T-shaped block, hollow block, U-shaped block, No. 1 spring, plug block and docking groove. During the production process, it can be adjusted according to different design or production requirements to adapt to the size of the workpiece, providing greater flexibility.

[0014] (2) In the present invention, by setting a length-fixing device, the workpiece is advanced by the placement wheel. The workpiece will pass through the inner wall of the fixed frame until it contacts the rotating rod, causing the rotating rod to rotate. The rotating rod rotates in conjunction with the bolt and nut to adjust the position of the push rod. Due to the frequent rotation of the rotating rod, the nut may become loose due to long-term movement. The nut moves in conjunction with the auxiliary seat, the stop block, the limit angle and the No. 4 spring to normally thread the nut and the bolt. When the nut is loose, the non-inclined surface of the limit angle contacts the non-inclined surface of the stop block, so that the nut cannot be reversed. Preventing the nut from reversing can effectively prevent the loosening of the connection part, ensure the stability and reliability of the mechanical structure, and avoid accidents or failures caused by looseness. The length of the workpiece cut is fixed by moving the position of the slider. When adjustment is required, the No. 5 spring is compressed by moving the L-shaped block downward so that the L-shaped block is out of the slot. At this time, the slider can be automatically moved to the position to be adjusted. The length-fixing method can quickly and continuously process multiple workpieces, reducing the time for workers to manually measure and mark, and improving overall production efficiency.

[0015] (3) In this invention, through the setting of the cutting device, the rotation of the rotating motor 2 drives the cutting blade to rotate through the No. 1 belt, and the rotation of the rotating motor 1 cooperates with the turning knob, connecting rod, pressure plate, slide block, push rod, brake block, hollow cylinder and No. 6 spring to move the receiving block downward. The movement of the receiving block drives the cutting blade to move and compresses the No. 7 spring at the same time. The movement of the receiving block is damped by the No. 7 spring to achieve cutting of the workpiece. The damping can maintain stable contact between the tool and the workpiece, ensuring the consistency of cutting depth and width. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of a partial cross-sectional structure of the regulating device of the present invention; Figure 3 It is a schematic diagram of the position structure of the limit rod and the blocking block of the present invention; Figure 4 This is a schematic diagram of the internal structure of the hollow block of the present invention; Figure 5 It is a structural schematic diagram of the length fixing device of the present invention; Figure 6 This is a schematic diagram of the bolt and nut position structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the auxiliary seat of the present invention; Figure 8 This is a schematic diagram of the position structure of the L-shaped block and the slider of the present invention; Fig. 9 It is a schematic diagram of a partial cross-sectional structure of the cutting device of the present invention; Fig.10 It is a schematic diagram of the position structure of the brake block and the receiving rod of the present invention.

[0017] In the figure: 1, machine tool; 10, fixed frame; 11, placement wheel; 12, limiting wheel; 13, screw rod; 14, limiting rod; 15, blocking block; 16, hollow block; 17, plug block; 18, U-shaped block; 19, No. 1 spring; 110, T-shaped block; 111, latch; 20, fixed frame; 21, slide frame; 22, slider; 23, rotating rod; 24, push rod; 25, bolt; 26, nut; 27, auxiliary seat; 28, limiting angle; 29, round rod; 210 , stop block; 211, spring No. 4; 212, L-shaped block; 213, fixed rod; 214, spring No. 5; 215, receiving rod; 216, hollow cylinder; 217, spring No. 6; 218, brake block; 30, long block; 31, rotating motor one; 32, knob; 33, connecting rod; 34, slide block; 35, pressure plate; 36, cylinder; 37, sliding column; 38, spring No. 7; 39, receiving block; 310, rotating motor two; 311, cutting blade. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-Figure 4An embodiment of the present invention is: a CNC lathe for machining mechanical parts, comprising a machine tool 1, an adjusting device is arranged above the machine tool 1, the adjusting device comprises a fixed frame 10, a placing wheel 11, a limiting wheel 12, a screw rod 13, a limiting rod 14, a positioning block 15, a hollow block 16, an insert block 17, a U-shaped block 18, a No. 1 spring 19, a T-shaped block 110 and a latch 111, the fixed frame 10 is fixedly mounted on the top of the machine tool 1, the placing wheel 11 is rotatably mounted on the inner wall of the fixed frame 10, the limiting wheel 12 is slidably mounted on the inner wall of the fixed frame 10, one side of the screw rod 13 is fixedly mounted on the top of the limiting wheel 12, the other side of the screw rod 13 slides through the inner and outer walls of the fixed frame 10, the limiting rod 14 is rotatably mounted on the top of the screw rod 13, the positioning block 15 is slidably mounted on the outer wall of the limit rod 14 to prevent the screw rod 13 from being accidentally touched by external force and causing rotation, thereby affecting the fixation of the workpiece. The hollow block 16 is fixedly penetrated through the inner and outer walls of the fixed frame 10. The plug block 17 is slidably mounted on the inner wall of the hollow block 16. The U-shaped block 18 is slidably mounted on the inner wall of the hollow block 16. The No. 1 spring 19 is arranged between the plug block 17 and the U-shaped block 18. The plug block 17 is reset by the arranged No. 1 spring 19. One side of the T-shaped block 110 is slidably mounted on the inner wall of the hollow block 16, and the other side of the T-shaped block 110 is fixedly mounted on the inner wall of the U-shaped block 18. The latch 111 slides through the inner and outer walls of the hollow block 16. During the production process, it is adjusted according to different designs or production requirements to adapt to the size of the workpiece and provide greater flexibility.

[0020] A limiting groove is provided on the top of the screw rod 13, a docking groove is provided on the front side of the limiting wheel 12, a spiral groove is provided on the circumferential surface of the screw rod 13, and the spiral groove is threadedly connected to the fixed frame 10 so that the screw rod 13 moves in a straight line. The bottom of the plug block 17 is set as an inclined surface, and a No. 2 spring is provided between the T-shaped block 110 and the hollow block 16, and the No. 2 spring is used to drive the T-shaped block 110 to reset, and a No. 3 spring is provided between the pin 111 and the hollow block 16, and the No. 3 spring is used to drive the pin 111 to reset.

[0021] When the present embodiment is working, the long workpiece is placed on the inner wall of the placing wheel 11, and the spiral groove is driven to rotate by rotating the screw rod 13. The rotation of the spiral groove causes the screw rod 13 to move in a straight line. The movement of the screw rod 13 drives the limiting wheel 12 to move, so that the height of the workpiece is adjusted and then fixed. When the screw rod 13 stops rotating, the rotation of the screw rod 13 is restricted by inserting the blocking block 15 into the limiting groove, so as to prevent the screw rod 13 from being accidentally touched by external force and causing rotation, thereby affecting the fixation of the workpiece. The movement of the limiting wheel 12 makes the outer wall of the limiting wheel 12 contact with the inclined surface of the insert block 17, so that the insert block 17 moves along the inner wall of the hollow block 16. The movement of the insert block 17 compresses the No. 1 spring 19. When the docking groove When it is at the same level with the plug block 17, the No. 1 spring 19 is released to drive the plug block 17 to reset and insert into the docking groove. At this time, the position of the limiting wheel 12 is fixed. By pressing the latch 111, it contacts the inclined surface of the T-shaped block 110, so that the T-shaped block 110 moves along the inner wall of the hollow block 16. The movement of the T-shaped block 110 drives the U-shaped block 18 to move. The movement of the U-shaped block 18 will stretch the No. 1 spring 19. When the No. 1 spring 19 is stretched to a certain extent, it will pull the plug block 17 to move, and the plug block 17 will move out of the docking groove. At this time, the limiting wheel 12 can move freely. During the production process, it can be adjusted according to different designs or production requirements to adapt to the size of the workpiece and provide greater flexibility.

[0022] See also Figure 1-Figure 10 On the basis of the above embodiment, in another embodiment of the present invention, a length fixing device and a cutting device are arranged above the machine tool 1, and the length fixing device includes a fixed frame 20, a slide frame 21, a slider 22, a rotating rod 23 and a push rod 24. The fixed frame 20 is fixedly installed on the top of the machine tool 1, the slide frame 21 is fixedly installed on the top of the machine tool 1, the slider 22 is slidably installed on the inner wall of the slide frame 21, the rotating rod 23 is rotatably installed on the right side of the slider 22, and the push rod 24 is fixedly installed on the right side of the rotating rod 23. A No. 1 torsion spring is arranged between the rotating rod 23 and the slider 22, and the rotating rod 23 is reset by the arranged No. 1 torsion spring. A card slot is opened on the inner wall of the slide frame 21, and the workpiece is advanced by the placement wheel 11, and the workpiece will pass through the inner wall of the fixed frame 20.

[0023] The fixed length device also includes a bolt 25, a nut 26, an auxiliary seat 27, a limit angle 28, a round rod 29, a stop block 210 and a No. 4 spring 211. The bolt 25 is fixedly installed inside the push rod 24, the nut 26 is threadedly installed on the threaded surface of the bolt 25, the inner wall of the nut 26 is provided with a mounting groove, the auxiliary seat 27 is sleeved on the left side of the nut 26, the limit angle 28 is fixedly installed on the inner wall of the mounting groove, the bottom of the limit angle 28 is set as an inclined surface, the round rod 29 slides through the inner and outer walls of the auxiliary seat 27, and the stop block 210 is fixedly installed on the top of the round rod 29. The position of the push rod 24 can be adjusted by installing the bolt 25 and the nut 26, and the nut 26 can be prevented from reversing, which can effectively prevent the loosening of the connection part, ensure the stability and reliability of the mechanical structure, and avoid accidents or failures caused by loosening. The No. 4 spring 211 is set between the auxiliary seat 27 and the stop block 210, and the stop block 210 is reset by the set No. 4 spring 211.

[0024] The fixed length device also includes an L-shaped block 212, a fixed rod 213 and a No. 5 spring 214. One side of the L-shaped block 212 is slidably installed on the inner wall of the slider 22, the fixed rod 213 is fixedly installed on the inner wall of the slider 22, and the other side of the L-shaped block 212 is slidably installed on the circumferential surface of the fixed rod 213, so that the slider 22 can be freely moved to the position where adjustment is required. The fixed length can process multiple workpieces quickly and continuously, reducing the time for workers to manually measure and mark, and improving the overall production efficiency. The No. 5 spring 214 is set between the L-shaped block 212 and the slider 22, and the No. 5 spring 214 is set to drive the L-shaped block 212 to reset.

[0025] The fixed-length device also includes a receiving rod 215, a hollow cylinder 216, a No. 6 spring 217 and a brake block 218. The receiving rod 215 is fixedly installed on the top of the fixed frame 20, and the hollow cylinder 216 is slidably installed on the circumferential surface of the receiving rod 215. The No. 6 spring 217 is arranged between the hollow cylinder 216 and the receiving rod 215. The hollow cylinder 216 is reset by the No. 6 spring 217. The brake block 218 is fixedly installed on the circumferential surface of the hollow cylinder 216. The movement of the brake block 218 enables intermittent cutting of subsequent cutting workpieces.

[0026] The cutting device includes a long block 30, a rotating motor 31, a knob 32, a connecting rod 33, a slide block 34 and a pressure plate 35. The long block 30 is fixedly installed on the top of the machine tool 1, the fixed end of the rotating motor 31 is fixedly installed on the right side of the long block 30, the knob 32 is fixedly installed on the output end of the rotating motor 31, the connecting rod 33 is fixedly installed on the left side of the knob 32, the slide block 34 is fixedly installed on the left side of the long block 30, and the pressure plate 35 is slidably installed on the inner wall of the slide block 34. The rotation of the rotating motor 31 drives the knob 32 to rotate, and the rotation of the knob 32 drives the connecting rod 33 to move linearly back and forth. The movement of the connecting rod 33 drives the pressure plate 35 to move along the inner wall of the slide block 34.

[0027] The cutting device also includes a cylinder 36, a sliding column 37, a No. 7 spring 38, a receiving block 39, a rotating motor 310 and a cutting blade 311. The cylinder 36 is fixedly mounted on the top of the fixed frame 20, the sliding column 37 is slidably mounted on the inner wall of the cylinder 36, the receiving block 39 is fixedly mounted on the top of the sliding column 37, the No. 7 spring 38 is arranged between the receiving block 39 and the cylinder 36, and the receiving block 39 is driven to reset by the arranged No. 7 spring 38. The fixed end of the rotating motor 310 is fixedly mounted on the rear side of the receiving block 39, and the cutting blade 311 is rotatably mounted on the inner wall of the receiving block 39. The output end of the rotating motor 310 is connected to the cutting blade 311 through a No. 1 belt. The movement of the receiving block 39 is damped by the No. 7 spring 38 to achieve cutting of the workpiece. The damping can maintain stable contact between the tool and the workpiece to ensure consistency in cutting depth and width.

[0028] When the present embodiment is working, the workpiece is advanced progressively by the placement wheel 11, and the workpiece will pass through the inner wall of the fixed frame 20 until it contacts the rotating rod 23 to rotate the rotating rod 23, and the rotation of the rotating rod 23 drives the push rod 24 to move. The position of the push rod 24 can be adjusted by installing the bolt 25 and the nut 26. The frequent rotation of the rotating rod 23 may cause the nut 26 to loosen under long-term movement. The movement of the nut 26 drives the auxiliary seat 27 to move, and the inclined surface of the stop block 210 contacts the limit angle 28, so that the stop block 210 moves downward and compresses the No. 4 spring 211. At this time, the stop block 210 is free from the restriction of the limit angle 28, and the nut 26 and the bolt 25 can be threadedly connected normally. When the nut 26 is loose, the non-slanted surface of the limit angle 28 contacts the non-slanted surface of the stop block 210, so that the nut 26 cannot be reversed. Preventing the nut 26 from reversing can effectively prevent the loosening of the connection part, ensure the stability and reliability of the mechanical structure, and avoid accidents or failures caused by loosening. The length of the workpiece cut is fixed by moving the position of the slider 22. When adjustment is required, the L-shaped block 212 is moved downward to compress the No. 5 spring 214 so that the L-shaped block 212 is out of the slot. At this time, the slider 22 can be freely moved to the position where adjustment is required. The fixed length can process multiple workpieces quickly and continuously, reducing the time for workers to manually measure and mark, and improving the overall production efficiency. The rotation of the rotating motor 31 drives the knob 32 to rotate, and the rotation of the knob 32 drives the connecting rod 33 to move back and forth in a straight line. The movement of the connecting rod 33 drives the pressure plate 35 to move along the inner wall of the slide block 34. The push rod 24 moves and contacts the brake block 218, so that the brake block 218 moves to the bottom of the pressure plate 35. The pressure plate 35 contacts the brake block 218, so that the brake block 218 moves downward. The movement of the brake block 218 drives the hollow cylinder 216 to move downward, and the movement of the hollow cylinder 216 compresses the No. 6 spring 217. The rotation of the rotating motor 2 310 drives the cutting blade 311 to rotate through the No. 1 belt. The brake block 218 moves downward and contacts the receiving block 39, so that the receiving block 39 moves downward. The movement of the receiving block 39 drives the cutting blade 311 to move and compresses the No. 7 spring 38 at the same time, thereby cutting the workpiece.

[0029] 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 CNC lathe for machining mechanical parts, comprising a machine tool (1), characterized in that: An adjusting device, a length fixing device and a cutting device are arranged above the machine tool (1); The adjusting device comprises a fixed frame (10), a placement wheel (11), a limiting wheel (12), a screw (13), a limiting rod (14), a positioning block (15), a hollow block (16), an insert block (17), a U-shaped block (18), a No. 1 spring (19), a T-shaped block (110) and a latch (111); the fixed frame (10) is fixedly mounted on the top of the machine tool (1); the placement wheel (11) is rotatably mounted on the inner wall of the fixed frame (10); the limiting wheel (12) is slidably mounted on the inner wall of the fixed frame (10); one side of the screw (13) is fixedly mounted on the top of the limiting wheel (12); and the other side of the screw (13) slides through the inner and outer walls of the fixed frame (10). The limiting rod (14) is rotatably mounted on the top of the screw rod (13); the locking block (15) is slidably mounted on the outer wall of the limiting rod (14); the hollow block (16) is fixedly mounted on the inner and outer walls of the fixed frame (10); the insert block (17) is slidably mounted on the inner wall of the hollow block (16); the U-shaped block (18) is slidably mounted on the inner wall of the hollow block (16); the first spring (19) is arranged between the insert block (17) and the U-shaped block (18); one side of the T-shaped block (110) is slidably mounted on the inner wall of the hollow block (16); the other side of the T-shaped block (110) is fixedly mounted on the inner wall of the U-shaped block (18); and the latch (111) slidably penetrates the inner and outer walls of the hollow block (16).

2. A CNC lathe for machining mechanical parts according to claim 1, characterized in that: A limiting groove is arranged on the top of the screw rod (13), a docking groove is arranged on the front side of the limiting wheel (12), a spiral groove is arranged on the circumferential surface of the screw rod (13), the spiral groove is threadedly connected to the fixing frame (10), the bottom of the plug block (17) is arranged as an inclined surface, a No. 2 spring is arranged between the T-shaped block (110) and the hollow block (16), and a No. 3 spring is arranged between the latch pin (111) and the hollow block (16).

3. A CNC lathe for machining mechanical parts according to claim 2, characterized in that: The length-fixing device comprises a fixed frame (20), a slide frame (21), a slider (22), a rotating rod (23) and a push rod (24); the fixed frame (20) is fixedly mounted on the top of the machine tool (1); the slide frame (21) is fixedly mounted on the top of the machine tool (1); the slider (22) is slidably mounted on the inner wall of the slide frame (21); the rotating rod (23) is rotatably mounted on the right side of the slider (22); the push rod (24) is fixedly mounted on the right side of the rotating rod (23); a first torsion spring is arranged between the rotating rod (23) and the slider (22); and a clamping groove is provided on the inner wall of the slide frame (21).

4. A CNC lathe for machining mechanical parts according to claim 3, characterized in that: The length-fixing device further comprises a bolt (25), a nut (26), an auxiliary seat (27), a limiting angle (28), a round rod (29), a stop block (210) and a No. 4 spring (211), wherein the bolt (25) is fixedly mounted inside the push rod (24), the nut (26) is threadedly mounted on the threaded surface of the bolt (25), an inner wall of the nut (26) is provided with a mounting groove, the auxiliary seat (27) is sleeved on the left side of the nut (26), the limiting angle (28) is fixedly mounted on the inner wall of the mounting groove, the bottom of the limiting angle (28) is arranged as an inclined surface, the round rod (29) slides through the inner and outer walls of the auxiliary seat (27), the stop block (210) is fixedly mounted on the top of the round rod (29), and the No. 4 spring (211) is arranged between the auxiliary seat (27) and the stop block (210).

5. The CNC lathe for machining mechanical parts according to claim 4, characterized in that: The length-fixing device further comprises an L-shaped block (212), a fixing rod (213) and a No. 5 spring (214); one side of the L-shaped block (212) is slidably mounted on the inner wall of the slider (22); the fixing rod (213) is fixedly mounted on the inner wall of the slider (22); the other side of the L-shaped block (212) is slidably mounted on the circumferential surface of the fixing rod (213); and the No. 5 spring (214) is arranged between the L-shaped block (212) and the slider (22).

6. The CNC lathe for machining mechanical parts according to claim 5, characterized in that: The length-fixing device further comprises a receiving rod (215), a hollow cylinder (216), a No. 6 spring (217) and a brake block (218); the receiving rod (215) is fixedly mounted on the top of the fixing frame (20); the hollow cylinder (216) is slidably mounted on the circumferential surface of the receiving rod (215); the No. 6 spring (217) is arranged between the hollow cylinder (216) and the receiving rod (215); and the brake block (218) is fixedly mounted on the circumferential surface of the hollow cylinder (216).

7. The CNC lathe for machining mechanical parts according to claim 6, characterized in that: The cutting device comprises a long block (30), a rotating motor (31), a knob (32), a connecting rod (33), a slide block (34) and a pressing plate (35), wherein the long block (30) is fixedly mounted on the top of the machine tool (1), the fixed end of the rotating motor (31) is fixedly mounted on the right side of the long block (30), the knob (32) is fixedly mounted on the output end of the rotating motor (31), the connecting rod (33) is fixedly mounted on the left side of the knob (32), the slide block (34) is fixedly mounted on the left side of the long block (30), and the pressing plate (35) is slidably mounted on the inner wall of the slide block (34).

8. The CNC lathe for machining mechanical parts according to claim 7, characterized in that: The cutting device further comprises a cylinder (36), a sliding column (37), a No. 7 spring (38), a receiving block (39), a second rotating motor (310) and a cutting blade (311), wherein the cylinder (36) is fixedly mounted on the top of a fixing frame (20), the sliding column (37) is slidably mounted on the inner wall of the cylinder (36), the receiving block (39) is fixedly mounted on the top of the sliding column (37), the No. 7 spring (38) is arranged between the receiving block (39) and the cylinder (36), the fixed end of the second rotating motor (310) is fixedly mounted on the rear side of the receiving block (39), the cutting blade (311) is rotatably mounted on the inner wall of the receiving block (39), and the output end of the second rotating motor (310) is transmission-connected to the cutting blade (311) via a No. 1 belt.

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