Automatic CNC car skin machine

Abstract

The present invention discloses an automatic CNC lathe, comprising a bed, a spindle box is arranged at the left end of the bed, a tailstock is arranged at the right end of the bed, a spindle is arranged at the right end of the spindle box, a first center is arranged at the right end of the spindle, and a plurality of first center heads are arranged at the right end of the first center; a second center is arranged at the left end of the tailstock, and a plurality of second center heads are arranged at the left end of the second center; a milling device is arranged at the rear end of the bed, and the milling device comprises a base and a milling head, a guide rail is fixedly arranged at the upper end of the base, and the milling head moves left and right along the guide rail; a centering device is arranged at a position between the spindle box and the tailstock of the bed, and the centering device comprises a plurality of roller lifting devices. The above technical scheme has reasonable structural design, easy operation of adjusting the height of the roller device, reliable fixation of the workpiece, high working efficiency, ability to reduce workpiece waste and good practicality.

Description

Technical Field

[0001] The invention relates to the technical field of machine tools, and in particular to an automatic numerically controlled lathe machine. Background Art

[0002] The lathe is a special equipment for processing aluminum alloy round ingots. It processes the outer surface of the ingots and removes the hard impurities on the outer surface of the ingots.

[0003] The existing car skin machine has some structural deficiencies: (1) The existing car skin machine roller device is used to support the workpiece to a specified position to facilitate the tightening of the tailstock; however, the height adjustment of the existing car skin machine roller device is done by workers manually moving screws, nuts and other fasteners with a wrench, which has low work efficiency; and the workpiece positioning operation is troublesome and inconvenient to use; (2) The center point installed on the tailstock of the existing car skin machine is generally made of metal, and the head of the center point is integrally provided with a conical portion. Before fixing the workpiece, the workpiece must be loaded and clamped, and then a center hole is punched on the end face of the workpiece. After the center hole is punched, the conical portion of the center point is inserted into the center hole to tighten and fix the workpiece. After the workpiece is machined, the center hole needs to be sawed off, which is troublesome to operate and wastes a lot of workpiece materials. The processing takes a long time, resulting in high manufacturing costs and poor practicality. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an automatic CNC lathe with reasonable structural design, easy adjustment of the height of the roller device, reliable fixation of the workpiece, high working efficiency, ability to reduce workpiece waste and good practicality.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an automatic CNC lathe, comprising a bed, a spindle box is arranged at the left end of the bed, a tailstock is arranged at the right end of the bed, a spindle is arranged at the right end of the spindle box, a first center is arranged at the right end of the spindle, a plurality of first center heads are arranged at the right end of the first center; a second center is arranged at the left end of the tailstock, a plurality of second center heads are arranged at the left end of the second center;

[0006] A milling device is provided at the rear end of the bed, and the milling device includes a base and a milling head. A guide rail is fixedly provided at the upper end of the base, and the milling head moves along the guide rail.

[0007] The bed is provided with a centering device located between the main spindle box and the tailstock, and the centering device includes a plurality of roller lifting devices.

[0008] The present invention is further configured as follows: the tailstock comprises a tailstock box body and a tailstock box cover, a storage cavity is arranged in the tailstock box body, a first sleeve through hole is arranged on the left end surface of the tailstock box body, a second sleeve through hole is arranged on the right end surface of the tailstock box body, the axial center lines of the first sleeve through hole and the second sleeve through hole coincide, a tailstock sleeve assembly is penetrated through the first sleeve through hole and the second sleeve through hole, the tailstock sleeve assembly comprises a tailstock shaft and a sleeve, and the sleeve is sleeved on the tailstock shaft; an oil cylinder is fixedly arranged on the right end of the tailstock box body, a piston rod of the oil cylinder is connected to the right end of the sleeve; the right end of the second tip is connected and fixed to the left end of the tailstock shaft.

[0009] The present invention is further configured as follows: the tailstock box is provided with a bearing groove at the left end of the first sleeve through hole, a tapered inner sleeve and a first expansion sleeve are provided in the bearing groove, the tapered inner sleeve is arranged on the left end of the sleeve, and the first expansion sleeve is arranged on the tapered inner sleeve.

[0010] The present invention is further configured as follows: a bushing is sleeved on the right end of the sleeve located at the second sleeve through hole section; and an oil cylinder mounting seat is arranged between the right end surface of the tailstock box and the oil cylinder.

[0011] The present invention is further configured as follows: the second top comprises a top shell, a spherical pad, a concave pad and a top cover; a placement groove is provided on the front end surface of the top shell; the spherical pad and the concave pad are embedded in the placement groove; the inner end of the spherical pad is pressed against the inner wall surface of the placement groove; the outer end of the spherical pad is integrally provided with a spherical surface; the inner end of the concave pad is provided with a concave surface; the spherical surface of the spherical pad is inserted into the concave surface of the concave pad;

[0012] The top cover is provided with a plurality of top head mounting through holes, and a second top head is arranged in each top head mounting through hole. The rear end of each second top head is pressed against the front end surface of the concave pad, and the front end of each second top head is integrally provided with a conical boss, and the front end surface of the conical boss is integrally provided with a plurality of positioning convex strips, and the front end of each positioning convex strip is provided with a top blade.

[0013] The present invention is further configured as follows: a bed cavity is provided in the middle of the upper end surface of the bed, and the lower ends of the roller lifting devices are embedded in the bed cavity.

[0014] The present invention is further configured as follows: the roller lifting device comprises a lifting guide rod, one end of the lifting guide rod is provided with a gear, the lifting guide rod is provided with meshing teeth aligned with the gear end from bottom to top, the gear is meshed with the meshing teeth, and the upper end of the lifting guide rod is fixedly provided with a V-shaped seat;

[0015] An axial hole is provided in the middle of the gear, a transmission shaft is passed through the axial hole, a motor is provided at one end of the transmission shaft, a coupling is provided between the main shaft of the motor and the transmission shaft, and the main shaft of the motor is connected to one end of the transmission shaft through the coupling; the rotation of the main shaft of the motor drives the transmission shaft to rotate, the transmission shaft drives the gear to rotate, and the gear drives the lifting guide rod to move up and down.

[0016] The present invention is further configured as follows: a guide slot is vertically arranged on the lifting guide rod away from the meshing tooth end, and a guide key is arranged in the guide slot; a box body is arranged at the connecting section between the gear and the lifting guide rod, and the guide key is fixed to the box body by bolts, and guide rod through holes are arranged on the upper and lower end surfaces of the box body, and a transmission shaft through hole is arranged on the side of the box body.

[0017] The present invention is further configured as follows: the upper end of the lifting guide rod is fixed to the V-shaped seat by bolts, a plurality of second bearings are sleeved on the lifting guide rod, an upper end cover is sleeved on the upper end of the lifting guide rod, the upper end cover is fixed to the upper end surface of the box body by bolts, and the lower end cover is sleeved on the lower end of the lifting guide rod, and the lower end cover is fixed to the lower end surface of the box body by bolts.

[0018] The present invention is further configured as follows: a machine tool shell is disposed outside the bed, the machine tool shell is fixedly connected to the bed, and two sliding doors are disposed at the front end of the machine tool shell.

[0019] The beneficial effects of the present invention are as follows: compared with the prior art, the present invention has a reasonable structure, the roller lifting device drives the transmission shaft to rotate through the rotation of the main shaft of the motor, the transmission shaft drives the gear to rotate, and the gear drives the lifting guide rod to move up and down, the height adjustment is easy, and the working efficiency is high; and a V-shaped seat is arranged at the upper end of the lifting guide rod, the positioning operation of the workpiece is simple, the workpiece is supported to the specified position, the tailstock is convenient to be fixed and tightened, and it is easy to use;

[0020] The tailstock drives the tailstock sleeve assembly to extend and retract through the extension and retraction of the piston rod of the oil cylinder, and the workpiece is clamped between the second top and the first top of the spindle through the second top; a tapered inner sleeve and a first expansion sleeve are arranged in the bearing groove, the tapered inner push sleeve is arranged at the left end of the sleeve, and the first expansion sleeve is arranged on the tapered inner sleeve, so that the sleeve is reliably positioned and not easy to shake;

[0021] The tip edge of the positioning convex strip on the front end surface of the conical boss at the front end of the top body can directly clamp the end face of the workpiece, and the tip edge of the positioning convex strip is directly inserted into the end face of the workpiece, which can reliably position the workpiece; the workpiece does not need to be drilled with a center hole before installation, which reduces the processing steps and can effectively improve work efficiency. The workpiece does not need to be sawed off due to drilling the center hole, and less material is wasted on the workpiece, which can effectively reduce the manufacturing cost and facilitate the processing of the workpiece; a placement groove is provided on the front end surface of the top shell, and a spherical pad and a concave pad are embedded in the placement groove, and the inner end of the spherical pad is pressed against On the inner wall surface of the placement groove, the outer end of the spherical pad is integrally provided with a spherical surface, and the inner end of the concave pad is provided with a concave surface, and the spherical surface of the spherical pad is inserted into the concave surface of the concave pad; this structure can automatically correct the uneven end surface of the workpiece, can automatically adjust the center, and can complete the self-centering of the workpiece. Even if the end surface of the workpiece is uneven, the force on the workpiece can be uniform when it is tightened, and the number and specifications of the top heads can be replaced according to the diameter of the workpiece, which is reliable and easy to use; the conical boss can limit the top blade from being pressed excessively into the end surface of the workpiece, avoiding excessively deep indentations on the workpiece;

[0022] The milling head moves left and right, up and down, front and back along the guide rail, which can effectively remove hard impurities on the outer surface of the round ingot, with high surface precision and good practicality.

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of a local structure of an embodiment of the present invention;

[0026] Figure 3 It is a schematic structural diagram of a tailstock according to an embodiment of the present invention;

[0027] Figure 4 It is an exploded schematic diagram of the tailstock of an embodiment of the present invention;

[0028] Figure 5 is a schematic cross-sectional view of a tailstock according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the second top embodiment of the present invention;

[0030] Figure 7 is a cross-sectional schematic diagram of the second top of the embodiment of the present invention;

[0031] Figure 8 for Figure 6 The enlarged schematic diagram of the middle part I;

[0032] Fig. 9This is a schematic structural diagram of a roller lifting device according to an embodiment of the present invention;

[0033] Fig.10 A schematic diagram of a partial explosion of the roller lifting device according to an embodiment of the present invention Figure 1 ;

[0034] Fig.11 A schematic diagram of a partial explosion of the roller lifting device according to an embodiment of the present invention Figure 2 . DETAILED DESCRIPTION

[0035] In the description of this embodiment, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore, cannot be understood as limiting the present invention. In addition, if the terms "first", "second", and "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] See also Figures 1 to 11 The present invention discloses an automatic CNC lathe, comprising a bed 1, a spindle box 2 is arranged at the left end of the bed 1, a tailstock 3 is arranged at the right end of the bed 1, a spindle 21 is arranged at the right end of the spindle box 2, a first center 4 is arranged at the right end of the spindle 21, and a plurality of first center heads 41 are arranged at the right end of the first center 4; a second center 5 is arranged at the left end of the tailstock 3, and a plurality of second center heads 51 are arranged at the left end of the second center 5;

[0037] The rear end of the bed 1 is provided with a milling device 6, the milling device 6 comprises a base 61 and a milling head 62, a guide rail 63 is fixedly provided on the upper end of the base 61, and the milling head 62 moves along the guide rail 63;

[0038] The bed 1 is provided with a centering device between the spindle box 2 and the tailstock 3 , and the centering device includes a plurality of roller lifting devices 7 .

[0039] Preferably, the number of the first pinnacle heads 41 arranged on the right end face of the first pinnacle 4 is 6; the number of the second pinnacle heads 51 arranged on the left end face of the second pinnacle 5 is 6; and the number of the roller lifting devices 7 is 2.

[0040] In order to make the structural arrangement of the present invention more reasonable, as a preferred embodiment, the tailstock 3 described in this embodiment includes a tailstock box body 31 and a tailstock box cover 32, a storage cavity is arranged in the tailstock box body 31, a first sleeve through hole is arranged on the left end surface of the tailstock box body 31, and a second sleeve through hole is arranged on the right end surface of the tailstock box body 31, the axial center lines of the first sleeve through hole and the second sleeve through hole coincide, a tailstock sleeve assembly 33 is penetrated in the first sleeve through hole and the second sleeve through hole, the tailstock sleeve assembly 33 includes a tailstock shaft 331 and a sleeve 332, and the sleeve 332 is sleeved on the tailstock shaft 331; an oil cylinder 34 is fixedly arranged on the right end of the tailstock box body 31, and the piston rod of the oil cylinder 34 is connected to the right end of the sleeve 332; the right end of the second top 5 is connected and fixed to the left end of the tailstock shaft 331.

[0041] The tailstock housing 31 is provided with a bearing groove at the left end of the first sleeve through hole, and a tapered inner sleeve 35 and a first expansion sleeve 36 are provided in the bearing groove. The tapered inner sleeve 35 is sleeved on the left end of the sleeve 332 , and the first expansion sleeve 36 is sleeved on the tapered inner sleeve 35 .

[0042] The right end of the sleeve 332 is located in the second sleeve through hole section and is sleeved with a bushing 37 ; a cylinder mounting seat 38 is provided between the right end surface of the tailstock box 31 and the cylinder 34 .

[0043] Preferably, the second tip 5 comprises a tip shell 52, a spherical pad 53, a concave pad 54 and a tip cover 55. The front end surface of the tip shell 52 is provided with a placement groove, the spherical pad 53 and the concave pad 54 are embedded in the placement groove, the inner end of the spherical pad 53 is pressed against the inner wall surface of the placement groove, the outer end of the spherical pad 53 is integrally provided with a spherical surface, the inner end of the concave pad 54 is provided with a concave surface, and the spherical surface of the spherical pad 53 is inserted into the concave surface of the concave pad 54;

[0044] The top cover 55 is provided with a plurality of top head mounting through holes, each of which is provided with a second top head 51, the rear end of each second top head 51 is pressed against the front end surface of the concave pad 54, and the front end of each second top head 51 is integrally provided with a conical boss, and the front end surface of the conical boss is integrally provided with a plurality of positioning convex strips, and the front end of each positioning convex strip is provided with a top blade 511.

[0045] Preferably, two cutting edges 511 are integrally provided on the front end surface of each second tip 51 ; the structure of the first tip 4 is the same as that of the second tip 5 .

[0046] A bed cavity 11 is disposed in the middle of the upper end surface of the bed 1 , and the lower ends of the roller lifting devices 7 are embedded in the bed cavity 11 .

[0047] The roller lifting device 7 includes a lifting guide rod 71, one end of which is provided with a gear 72, and the lifting guide rod 71 is provided with meshing teeth 711 from bottom to top aligned with the gear end, the gear 72 is meshed with the meshing teeth 711, and the upper end of the lifting guide rod 71 is fixedly provided with a V-shaped seat 73;

[0048] An axial hole 721 is provided in the middle of the gear 72, and a transmission shaft 74 is passed through the axial hole 721. A motor 75 is provided at one end of the transmission shaft 74, and a coupling 76 is provided between the main shaft of the motor 75 and the transmission shaft 74. The main shaft of the motor 75 is connected to one end of the transmission shaft 74 through the coupling 76; the main shaft of the motor 75 rotates to drive the transmission shaft 74 to rotate, and the transmission shaft 74 drives the gear 72 to rotate, and the gear 72 drives the lifting guide rod 71 to move up and down.

[0049] The lifting guide rod 71 is vertically provided with a guide groove 712 away from the meshing tooth end, and a guide key 77 is provided in the guide groove 712; a box body 78 is provided at the connecting section between the gear 72 and the lifting guide rod 71, and the guide key 77 and the box body 78 are fixed by bolts, and guide rod through holes 781 are provided on the upper and lower end surfaces of the box body 78, and a transmission shaft through hole 782 is provided on the side of the box body 78.

[0050] The upper end of the lifting guide rod 71 is fixed to the V-shaped seat 73 by bolts, and a plurality of second bearings 79 are sleeved on the lifting guide rod 71. The upper end of the lifting guide rod 71 is sleeved with an upper end cover 710, and the upper end cover 710 is fixed to the upper end surface of the box body 78 by bolts. The lower end of the lifting guide rod 71 is sleeved with a lower end cover 713, and the lower end cover 713 is fixed to the lower end surface of the box body 78 by bolts.

[0051] The machine tool housing 8 is disposed outside the bed 1 . The machine tool housing 81 is fixedly connected to the bed 1 , and two sliding doors 9 are disposed at the front end of the machine tool housing 8 .

[0052] In actual application, the roller lifting device drives the transmission shaft to rotate through the rotation of the main shaft of the motor, the transmission shaft drives the gear to rotate, and the gear drives the lifting guide rod to move up and down, which is easy to adjust the height and has high working efficiency; and a V-shaped seat is provided at the upper end of the lifting guide rod, which is simple to operate for positioning the workpiece, and the workpiece is supported to the specified position, which is convenient for tightening the tailstock and easy to use;

[0053] The tailstock drives the tailstock sleeve assembly to extend and retract through the extension and retraction of the piston rod of the oil cylinder, and the workpiece is clamped between the second top and the first top of the spindle through the second top; a tapered inner sleeve and a first expansion sleeve are arranged in the bearing groove, the tapered inner push sleeve is arranged at the left end of the sleeve, and the first expansion sleeve is arranged on the tapered inner sleeve, so that the sleeve is reliably positioned and not easy to shake;

[0054] The tip blade of the positioning convex strip on the front end surface of the conical boss at the front end of the top body can directly clamp the end face of the workpiece, and the tip blade of the positioning convex strip is directly inserted into the end face of the workpiece, so that the workpiece is reliably positioned; there is no need to drill a center hole in the workpiece before installation, which reduces the processing steps and can effectively improve work efficiency, and the workpiece does not need to be sawed off due to drilling the center hole, so less material is wasted on the workpiece, which can effectively reduce the manufacturing cost and facilitate the processing of the workpiece; a storage groove is provided on the front end surface of the top shell, and a spherical pad and a concave pad are embedded in the storage groove, and the inner end of the spherical pad is pressed against the inner wall surface of the storage groove, and a spherical surface is integrally provided at the outer end of the spherical pad, and a concave surface is provided at the inner end of the concave pad, and the spherical surface of the spherical pad is inserted into the concave surface of the concave pad; this structure can automatically correct the uneven end face of the workpiece, and the number and specifications of the top head can be replaced according to the diameter of the workpiece, and it is reliable in fixation, easy to use and practical.

[0055] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above invention, which fall within the scope of protection of the present invention.

Claims

1. An automatic CNC lathe, comprising a bed (1), a spindle box (2) being arranged at the left end of the bed (1), a tailstock (3) being arranged at the right end of the bed (1), and a spindle (21) being arranged at the right end of the spindle box (2), characterized in that: The main shaft (21) is provided with a first centering pin (4) at the right end, and a plurality of first centering pins (41) are provided at the right end of the first centering pin (4); the tailstock (3) is provided with a second centering pin (5) at the left end, and a plurality of second centering pins (51) are provided at the left end; A milling device (6) is provided at the rear end of the bed (1), the milling device (6) comprising a base (61) and a milling head (62), a guide rail (63) is fixedly provided at the upper end of the base (61), and the milling head (62) moves along the guide rail (63); The bed (1) is provided with a centering device located between the spindle box (2) and the tailstock (3), and the centering device includes a plurality of roller lifting devices (7); The tailstock (3) comprises a tailstock box (31) and a tailstock box cover (32); a storage cavity is arranged in the tailstock box (31); a first sleeve through hole is arranged on the left end surface of the tailstock box (31); a second sleeve through hole is arranged on the right end surface of the tailstock box (31); the axial center lines of the first sleeve through hole and the second sleeve through hole coincide; a tailstock sleeve assembly (33) is inserted into the first sleeve through hole and the second sleeve through hole; the tailstock sleeve assembly (33) comprises a tailstock shaft (331) and a sleeve (332); the sleeve (332) is sleeved on the tailstock shaft (331); an oil cylinder (34) is fixedly arranged at the right end of the tailstock box (31); a piston rod of the oil cylinder (34) is connected to the right end of the sleeve (332); the right end of the second tip (5) is connected and fixed to the left end of the tailstock shaft (331); The second tip (5) comprises a tip shell (52), a spherical pad (53), a concave pad (54) and a tip cover (55); a placement groove is arranged on the front end surface of the tip shell (52); the spherical pad (53) and the concave pad (54) are embedded in the placement groove; the inner end of the spherical pad (53) is pressed against the inner wall surface of the placement groove; the outer end of the spherical pad (53) is integrally provided with a spherical surface; the inner end of the concave pad (54) is provided with a concave surface; the spherical surface of the spherical pad (53) is inserted into the concave surface of the concave pad (54); The top cap (55) is provided with a plurality of top head mounting through holes, each of which is provided with a second top head (51), the rear end of each second top head (51) is pressed against the front end surface of the concave pad (54), the front end of each second top head (51) is integrally provided with a conical boss, the front end surface of the conical boss is integrally provided with a plurality of positioning convex strips, and the front end of each positioning convex strip is provided with a top blade (511).

2. The automatic CNC lathe according to claim 1, characterized in that: The tailstock housing (31) is provided with a bearing groove at the left end of the first sleeve through hole, and a conical inner sleeve (35) and a first expansion sleeve (36) are provided in the bearing groove. The conical inner sleeve (35) is sleeved on the left end of the sleeve (332), and the first expansion sleeve (36) is sleeved on the conical inner sleeve (35).

3. The automatic CNC lathe according to claim 2, characterized in that: The right end of the sleeve (332) is located in the second sleeve through hole section and is sleeved with a bushing (37); and an oil cylinder mounting seat (38) is provided between the right end surface of the tailstock box (31) and the oil cylinder (34).

4. An automatic CNC lathe according to claim 1 or 3, characterized in that: A bed cavity (11) is provided in the middle of the upper end surface of the bed (1), and the lower ends of the roller lifting devices (7) are embedded in the bed cavity (11).

5. The automatic CNC lathe according to claim 4, characterized in that: The roller lifting device (7) comprises a lifting guide rod (71), one end of the lifting guide rod (71) is provided with a gear (72), the lifting guide rod (71) is aligned with the gear end and provided with meshing teeth (711) from bottom to top, the gear (72) meshes with the meshing teeth (711), and the upper end of the lifting guide rod (71) is fixedly provided with a V-shaped seat (73); A shaft hole (721) is provided in the middle of the gear (72), a transmission shaft (74) is passed through the shaft hole (721), a motor (75) is provided at one end of the transmission shaft (74), a coupling (76) is provided between the main shaft of the motor (75) and the transmission shaft (74), and the main shaft of the motor (75) is connected to one end of the transmission shaft (74) through the coupling (76); the main shaft of the motor (75) rotates to drive the transmission shaft (74) to rotate, the transmission shaft (74) drives the gear (72) to rotate, and the gear (72) drives the lifting guide rod (71) to move up and down.

6. The automatic CNC lathe according to claim 5, characterized in that: The lifting guide rod (71) is vertically provided with a guide slot (712) away from the meshing tooth end, and a guide key (77) is arranged in the guide slot (712); a box body (78) is arranged at the connecting section between the gear (72) and the lifting guide rod (71), and the guide key (77) and the box body (78) are fixed by bolts, and guide rod through holes (781) are arranged on the upper and lower end surfaces of the box body (78), and a transmission shaft through hole (782) is arranged on the side of the box body (78).

7. The automatic CNC lathe according to claim 6, characterized in that: The upper end of the lifting guide rod (71) is connected and fixed to the V-shaped seat (73) by bolts, a plurality of second bearings (79) are sleeved on the lifting guide rod (71), an upper end cover (710) is sleeved on the upper end of the lifting guide rod (71), and the upper end cover (710) is connected and fixed to the upper end surface of the box body (78) by bolts, and a lower end cover (713) is sleeved on the lower end of the lifting guide rod (71), and the lower end cover (713) is connected and fixed to the lower end surface of the box body (78) by bolts.

8. The automatic CNC lathe according to claim 1, characterized in that: The bed (1) is provided with a machine tool housing (8) on its outer shell; the machine tool housing (81) is fixedly connected to the bed (1); and two sliding doors (9) are provided at the front end of the machine tool housing (8).

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