Heavy numerical control horizontal lathe with multifunctional protective cover

Abstract

The application discloses a heavy numerical control horizontal lathe with multifunctional protective cover, which comprises a bed body, a heightening pad, a main shaft box assembly, a Z-axis driving assembly, an X-axis tool rest driving assembly, a tailstock needle assembly, a iron chip collecting assembly and a protective cover integrated assembly, the iron chip collecting assembly is arranged directly below the trapezoidal slide rail movement range of the X-axis tool rest driving assembly and placed on the ground, and the protective cover integrated assembly is composed of a main shaft box protective cover, a machining area protective cover and a tailstock protective cover. The application has the following effects: the spatial movement problem is solved by designing the multifunctional protective cover, which is beneficial to the processing control of operators; the iron chip collecting assembly driven by the motor realizes regular intelligent cleaning, which saves time and labor and reduces the labor intensity of operators; and the cooperation of the trapezoidal slide rail, the five-edge section slide and the parallel four-edge slide realizes the secondary movement in the Z-axis direction, the movement series can be matched according to the position adjustment distance, the reciprocating movement abrasion of the five-edge section slide is reduced, and the service life of the lathe is prolonged.

Description

Technical Field

[0001] This invention relates to a CNC machine tool, and more particularly to a heavy-duty CNC horizontal lathe with a multi-functional protective cover. Background Technology

[0002] Machine tools are machines that process metal blanks into mechanical parts. In modern mechanical manufacturing, there are many methods for processing mechanical parts, including cutting, casting, forging, welding, stamping, extrusion, etc. However, parts with high precision requirements and fine surface roughness requirements generally need to be finally processed by cutting on machine tools.

[0003] With the development of CNC technology, higher requirements have been placed on the productivity, machining accuracy, lifespan, and ergonomics of machine tools, taking into account control methods and usage characteristics. However, existing machine tools have many shortcomings due to design reasons. For example, the protective cover is limited by space due to design problems and cannot move back and forth to the outer sides of the headstock. The collection of iron chips is laborious and the lifespan of the reciprocating Z-axis track is short. These are all existing problems that need to be improved. Summary of the Invention

[0004] The purpose of this invention is to provide a heavy-duty CNC horizontal lathe with a multi-functional protective cover. This CNC machine tool solves the problem of spatial movement by designing a multi-functional protective cover, and achieves regular intelligent cleaning by designing a motor-driven chip collection component. It also achieves two-stage movement in the Z-axis direction through the combined design of trapezoidal slide rails, pentagonal cross-section slides, and parallelogram sliders. The number of movement stages can be appropriately selected according to the position and distance adjustment, reducing the wear of reciprocating movement on the pentagonal cross-section slides and extending the machine tool's life.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a heavy-duty CNC horizontal lathe with a multi-functional protective cover, characterized in that it includes a bed as a base, a chip collection assembly for collecting iron chips, a protective cover integrated assembly for protection, and a spindle box assembly, a Z-axis drive assembly, an X-axis tool post drive assembly, and a tailstock ejector assembly disposed on the bed.

[0006] The spindle box assembly is located at the left end of the upper surface of the machine bed and is used to house the machine tool's working spindle. The upper surface of the machine bed is also provided with two parallel trapezoidal slide rails, on which the X-axis tool post drive assembly and the tailstock ejector assembly are slidably mounted. The tailstock ejector assembly can be locked to the trapezoidal slide rails. The Z-axis drive assembly is fixed to the side of the machine bed, and the X-axis tool post drive assembly moves on the trapezoidal slide rails via the power transmitted by the Z-axis drive assembly.

[0007] The bed is also provided with a pentagonal section slide rail, and the X-axis tool post drive assembly is provided with a slide groove and a parallelogram slider. The length of the parallelogram slider is longer than the slide groove, and the length of the pentagonal section slide rail is longer than the parallelogram slider. The parallelogram slider can slide relative to the slide groove and the pentagonal section slide rail respectively.

[0008] When a small range of adjustment is required, the parallelogram slider and the pentagonal section slide are relatively stationary, and the parallelogram slider and the slide groove slide relative to each other to achieve the Z-axis position adjustment; when a larger range of adjustment is required, the slide groove moves to the end of the parallelogram slider, and then drives the parallelogram slider to move together, so that the parallelogram slider moves on the pentagonal section slide groove to achieve a large range of Z-axis position adjustment.

[0009] In a preferred embodiment of the present invention, the chip collection assembly is positioned directly below the area where the X-axis tool holder drive assembly moves along the trapezoidal slide rail. The chip collection assembly includes a collection tray, a moving tray, and a driver. The collection tray has a plurality of symmetrical rollers that roll in contact with the moving tray. A plurality of wheels are provided on the bottom surface of the moving tray. The driver is threadedly connected to the moving tray via a lead screw. When the driver rotates, the moving tray, assisted by the rollers, moves out from below the X-axis tool holder drive assembly, simultaneously pulling the collection tray out with it. The collection tray moves relative to the moving tray with the assistance of the rollers, thereby cleaning the chip collection assembly. More preferably, the driver is controlled by a CNC system. Each of the four symmetrical rollers on the collection tray is equipped with a pressure sensor. The pressure sensors feed back signals to the CNC system, which then sends commands to the driver.

[0010] As a preferred embodiment of the present invention, the protective cover integrated assembly includes a spindle box protective cover that wraps around the spindle box assembly, a machining area protective cover that can slide left and right, and a tailstock protective cover that wraps around the tailstock protective cover; the machining area protective cover includes a left cover and a right cover, the inner wall surface of the left cover is clearance-fitted with the outer wall surface of the spindle box protective cover, and the inner wall surface of the right cover is clearance-fitted with the upper outer wall surface of the tailstock protective cover.

[0011] As a preferred embodiment of the present invention, the processing area protective cover is slidably connected to the spindle box protective cover and the tailstock protective cover via a sliding rod. The left and right ends of the sliding rod are respectively fixed to the spindle box protective cover and the tailstock protective cover by several brackets. A left slider and a right slider are also slidably arranged on the sliding rod. The left slider is fixed to the left protective cover, and the right slider is fixed to the right protective cover.

[0012] As a preferred embodiment of the present invention, the Z-axis drive assembly includes a Z-axis motor, a coupling, a Z-axis lead screw, a left bearing housing, and a right bearing housing. The left and right bearing housings are respectively fixed to the left and right ends of the bed. The Z-axis motor is fixed on the left bearing housing, and the coupling connects the Z-axis motor and one end of the Z-axis lead screw. The other end of the Z-axis lead screw is rotatably mounted on the right bearing housing.

[0013] The X-axis tool post drive assembly and the Z-axis drive assembly's Z-axis lead screw are threaded together. When the Z-axis motor drives the rotation, the coupling connected to the Z-axis motor drives the Z-axis lead screw to rotate. The Z-axis lead screw transmits the rotational force to the X-axis tool post drive assembly, thereby driving the X-axis tool post drive assembly to move on the trapezoidal slide rail.

[0014] As a preferred embodiment of the present invention, the tailstock ejector assembly is mounted on a trapezoidal slide rail via a lower slide plate and an upper slide block. The lower slide plate is in contact with the right-angled surface of the trapezoidal slide rail. The upper slide block is provided with a hinge, and the lower slide plate is provided with a static buckle that can cooperate with the hinge. A locking nut post is also provided through the lower slide plate and the upper slide block. A nut is fixed at the top of the locking nut post. The locking nut post locks the lower slide plate, the upper slide block and the trapezoidal slide rail by rotating the nut.

[0015] As a preferred embodiment of the present invention, a heightening pad is further provided between the spindle box assembly and the bed, and the spindle box assembly is fixed on the heightening pad; the spindle box assembly includes a drive device, a speed change system, and a hydraulic indexing chuck, the drive device is connected to the speed change system, and the hydraulic indexing chuck is connected to the output end of the speed change system.

[0016] In summary, this invention has the following beneficial effects: The design of this CNC machine tool, through a multi-functional protective cover, solves the spatial movement problem, facilitating operator control during processing; the design of a motor-driven chip collection component enables regular intelligent cleaning, saving time and effort and reducing operator workload; furthermore, the combined design of trapezoidal slide rails, pentagonal cross-section slideways, and parallelogram sliders achieves two-stage movement in the Z-axis direction. The number of movement stages can be appropriately selected based on the position and distance adjustment, reducing wear on the reciprocating movement of the pentagonal cross-section slideway and extending the machine tool's lifespan. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the anti-loosening lifting machine in Example 1;

[0018] Figure 2 yes Figure 1 A structural diagram after removing the casing and installing the brackets;

[0019] Figure 3 yes Figure 2 A structural diagram from another direction after removing the servo motor and anti-loosening components;

[0020] Figure 4 yes Figure 3 Enlarged schematic diagram of the right-angled surface of the trapezoidal slide rail;

[0021] Figure 5 This is a schematic diagram of the iron filings collection component.

[0022] Figure 6 yes Figure 3 Schematic diagram of the middle guide block;

[0023] Figure 7 yes Figure 2 A schematic diagram of the structure after removing the end caps and lifting components;

[0024] Figure 8 yes Figure 7 Top view of the structure.

[0025] Reference numerals: 1. Bed; 2. Raising pad; 3. Spindle box assembly; 4. Z-axis drive assembly; 5. X-axis tool post drive assembly; 6. Tailstock center assembly; 7. Chip collection assembly; 8. Protective cover integrated assembly; 9. Slide rod; 10. Slider; 1A. Bracket; 1B. Left slide; 1C. Right slide; 1D. Connecting plate; 11. Trapezoidal slide rail; 12. Pentagonal section slide rail; 31. Drive unit; 32. Speed ​​change system; 33. Hydraulic indexing chuck; 41. Z-axis motor; 42. Coupling; 43. Z-axis lead screw; 44. Left bearing seat ; 45. Right bearing housing; 51. Slide groove; 52. Parallelogram slider; 61. Lower slide plate; 62. Upper slide block; 71. Collection tray; 72. Moving tray; 73. Driver; 81. Spindle box protective cover; 82. Machining area protective cover; 83. Tailstock protective cover; 91. Left slide rod; 92. Right slide rod; 111. Right angle surface; 611. Static buckle; 612. Locking nut column; 613. Nut; 621. Hinge; 711. Roller; 721. Roller; 821. Left protective cover; 822. Right protective cover; 7111. Pressure sensor. Detailed Implementation

[0026] The present invention will be further described and illustrated below with reference to specific embodiments. The embodiments described are merely examples of the content of this disclosure and do not limit the scope of the invention. The technical features of each embodiment in the present invention can be combined accordingly, provided that there is no mutual conflict.

[0027] like Figure 1 As shown, a heavy-duty CNC horizontal lathe with a multi-functional protective cover includes a bed 1 as a base, a chip collection assembly 7 for collecting chips, a protective cover integrated assembly 8 for protection, a heightening pad 2, a spindle box assembly 3, a Z-axis drive assembly 4, an X-axis tool post drive assembly 5, and a tailstock ejector assembly 6 disposed on the bed 1.

[0028] In one embodiment of the present invention, such as Figure 2 As shown, the upper surface of the bed 1 is provided with two parallel trapezoidal slide rails 11. The trapezoidal slide rails 11 are slidably engaged with the X-axis tool post drive assembly 5. The X-axis tool post drive assembly 5 is in contact with the lead screw and nut of the Z-axis drive assembly 4. The Z-axis drive assembly 4 is fixed to the side of the bed 1. The lifting pad 2 is fixed to the left end of the upper surface of the bed 1. The spindle box assembly 3 is fixed on the lifting pad 2. The spindle box assembly 3 includes a drive device 31, a speed change system 32, and a hydraulic indexing chuck 33. The drive device 31 is connected to the speed change system 32, and the hydraulic indexing chuck 33 is connected to the output end of the speed change system 32. Figure 3 and Figure 4 As shown, the tailstock ejector assembly 6 is slidably engaged with the trapezoidal slide rail 11. The tailstock ejector assembly 6 is mounted on the bed 1 via a lower slide plate 61 and an upper slide 62. The lower slide plate 61 engages with the right-angled surface 111 of the trapezoidal slide rail 11. The upper slide 62 is provided with a hinge 621. The lower slide plate 61 is provided with a static buckle 611 and a locking nut post 612 that penetrates the upper slide 62. The hinge 621 and the static buckle 611 can be connected. The locking nut post 612 locks the lower slide plate 61, the upper slide 62 and the trapezoidal slide rail 11 with a nut 613 to prevent the tailstock ejector assembly 6 from moving relative to the trapezoidal slide rail 11 during machining, thus affecting the machining process.

[0029] In one embodiment of the present invention, such as Figure 5 As shown, the chip collection assembly 7 is located directly below the movement range of the trapezoidal slide rail 11 where the X-axis tool post drive assembly 5 is located. The chip collection assembly 7 also includes a collection plate 71, a moving plate 72, and a driver 73. The collection plate 71 is provided with four symmetrical rollers 711. The rollers 711 are in contact with the moving plate 72 and roll in cooperation. The moving plate 72 is provided with four rollers 721 at the front and rear. The driver 73 is in cooperation with the moving plate 72 through a lead screw thread.

[0030] In one embodiment of the present invention, such as Figure 1 and Figure 6 As shown, the protective cover integrated assembly 8 consists of a spindle box protective cover 81, a machining area protective cover 82, and a tailstock protective cover 83. The spindle box protective cover 81 is fixed on the bed 1 at the location of the spindle box assembly 3, and the tailstock protective cover 83 is fixed on the bed 1 at the location of the tailstock ejector assembly 6. The machining area protective cover 82 is connected to the connecting plate 1D of the spindle box protective cover 81 and the tailstock protective cover 83 through the sliding rod 9 and the slider 10 respectively.

[0031] In a preferred embodiment of the present invention, such as Figure 1 As shown, the machining area protective cover 82 is divided into a left cover 821 and a right cover 822. The lower bottom surface of the left cover 821 is clearance-fitted with the upper bottom surface of the spindle box protective cover 81, and the lower bottom surface of the right cover 822 is clearance-fitted with the upper bottom surface of the tailstock protective cover 83. More preferably, as Figure 6The slide rod 9 shown is divided into a left slide rod 91 and a right slide rod 92. The left slide rod 91 is fixed by five brackets 1A on the spindle box protective cover 81, and the right slide rod 92 is fixed by six brackets 1A on the tailstock protective cover 83. The left slide rod 91 and the right slide rod 92 are respectively matched with a left slider 1B and a right slider 1C. The left slider 1B is fixed to the left protective cover 821, and the right slider 1C is fixed to the right protective cover 822.

[0032] In one embodiment of the present invention, such as Figure 2 As shown, the Z-axis drive assembly 4 includes a Z-axis motor 41, a coupling 42, a Z-axis lead screw 43, a left bearing housing 44, and a right bearing housing 45. The Z-axis motor 41 is fixed on the left bearing housing 44. The coupling 42 connects the Z-axis motor 41 and the Z-axis lead screw 43. The Z-axis lead screw 43 passes through the left bearing housing 44 and the right bearing housing 45. The left bearing housing 44 and the right bearing housing 45 are fixed on the bed 1.

[0033] When the Z-axis motor 41 drives the rotation, the coupling 42 connected to the Z-axis motor 41 drives the Z-axis lead screw 43 to rotate. Since the Z-axis lead screw 43 and the X-axis tool post drive assembly 5 are in a lead screw and nut fit, the X-axis tool post drive assembly 5 generates Z-axis direction movement.

[0034] In one embodiment of the present invention, such as Figure 7 The bed 1 shown is also provided with a pentagonal section slide rail 12. The X-axis tool post drive assembly 5 is provided with a slide groove 51 and a parallelogram slider 52. The slide groove 51 cooperates with the parallelogram slider 52, and the parallelogram slider 52 slides in close contact with the pentagonal section slide rail 12.

[0035] More preferably, the mating surface between the parallelogram slider 52 and the pentagonal section slide rail 12 is an inclined surface. The length of the parallelogram slider 52 is longer than that of the slide groove 51, and the length of the pentagonal section slide rail 12 is longer than that of the parallelogram slider 52. The parallelogram slider 52 can slide relative to the slide groove 51 and the pentagonal section slide rail 12 respectively.

[0036] When a small range of adjustment is required, the parallelogram slider 52 and the pentagonal section slide rail 12 remain relatively stationary, while the parallelogram slider 52 slides relative to the slide groove 51 to achieve Z-axis position adjustment. When a larger range of adjustment is required, the slide groove 51 moves to the end of the parallelogram slider 52, then drives the parallelogram slider 52 to move together, allowing the parallelogram slider 52 to move on the pentagonal section slide rail 12, thus achieving a large range of Z-axis position adjustment. The secondary position adjustment of the X-axis tool post drive assembly 5 relative to the bed 1 helps reduce the number of times it slides directly on the pentagonal section slide rail 12, extending the life of the pentagonal section slide rail 12. Moreover, the parallelogram slider 52 is easy to disassemble and replace.

[0037] In a preferred embodiment of the present invention, such as Figure 8As shown, the driver 73 is controlled by a CNC system. Each of the four rollers 711 symmetrically arranged on the collecting disc 71 is equipped with a pressure sensor 7111. The pressure sensor 7111 feeds back signals to the CNC system, and the CNC system sends instructions to the driver 73.

[0038] The pressure on the four rollers 711 is collected and fed back in real time by the pressure sensor 7111. When the signal value collected by the pressure sensor 7111 is greater than the judgment signal value S, the CNC system sends a command to the driver 73 to rotate the driver 73. When the driver 73 rotates, the moving disc 72 moves away from the operator from under the bed 1 with the assistance of the rollers 721 through the contact engagement of the screw and nut. At the same time, the collecting disc 71 is also brought out. Then, the collecting disc 71 is dragged by manual operation. With the assistance of the rollers 711, the collecting disc 71 moves relative to the moving disc 72, thereby completing the cleaning of the scrap collection component 7. After the scrap on the collecting disc 71 is cleaned, the signal value collected by the pressure sensor 7111 is less than the judgment signal value. The CNC system sends a command to the driver 73 to reverse the driver 73, so that the moving disc 72 returns to its original position.

[0039] In summary, the CNC machine tool of this invention solves the spatial movement problem by designing a multi-functional protective cover, which is beneficial to the operator's processing control; the design of a motor-driven chip collection component enables regular intelligent cleaning, saving time and effort and reducing the operator's labor intensity; and the cooperative design of trapezoidal slide rails, pentagonal cross-section slides, and parallelogram sliders enables two-stage movement in the Z-axis direction. The number of movement stages can be appropriately selected according to the position and distance adjustment, reducing the wear of reciprocating movement on the pentagonal cross-section slide rails and extending the machine tool's lifespan.

[0040] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. Those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A heavy-duty CNC horizontal lathe with a multi-functional protective cover, characterized in that, It includes a bed (1) as a base, a chip collection assembly (7) for collecting chips, a protective cover integration assembly (8) for protection, and a spindle box assembly (3), a Z-axis drive assembly (4), an X-axis tool post drive assembly (5), and a tailstock ejector assembly (6) disposed on the bed (1). The protective cover integrated assembly (8) includes a spindle box protective cover (81) that wraps around the spindle box assembly (3), a machining area protective cover (82) that can slide left and right, and a tailstock protective cover (83). The spindle box assembly (3) is located on the left end of the upper surface of the bed (1) and is used to arrange the machine tool spindle; the upper surface of the bed (1) is also provided with two parallel trapezoidal slide rails (11), and the X-axis tool post drive assembly (5) and the tailstock ejector assembly (6) are slidably arranged on the trapezoidal slide rails (11); the tailstock ejector assembly (6) can be locked with the trapezoidal slide rails (11); the Z-axis drive assembly (4) is fixed on the side of the bed (1), and the X-axis tool post drive assembly (5) moves on the trapezoidal slide rails (11) through the power transmitted by the Z-axis drive assembly (4); The bed (1) is also provided with a pentagonal section slide rail (12), and the X-axis tool post drive assembly (5) is provided with a slide groove (51) and a parallelogram slider (52). The length of the parallelogram slider (52) is longer than that of the slide groove (51), and the length of the pentagonal section slide rail (12) is longer than that of the parallelogram slider (52). The parallelogram slider (52) can slide relative to the slide groove (51) and the pentagonal section slide rail (12) respectively. When a small range of adjustment is required, the parallelogram slider (52) and the pentagonal section slide (12) remain relatively stationary, and the parallelogram slider (52) and the slide groove (51) slide relative to each other to achieve the Z-axis position adjustment; when a large range of adjustment is required, the slide groove (51) moves to the end of the parallelogram slider (52), and then drives the parallelogram slider (52) to move together, so that the parallelogram slider (52) moves on the pentagonal section slide groove (12) to achieve a large range of Z-axis position adjustment.

2. A heavy-duty CNC horizontal lathe with a multi-functional protective cover according to claim 1, characterized in that, The scrap collection assembly (7) is located directly below the X-axis tool holder drive assembly (5) along the trapezoidal slide rail (11). The scrap collection assembly (7) includes a collection tray (71), a moving tray (72), and a driver (73). The collection tray (71) is provided with a number of symmetrical rollers (711). The rollers (711) are in contact with the moving tray (72) and roll in cooperation. The bottom surface of the moving tray (72) is provided with a number of rollers (721). The driver (73) is connected to the moving tray (72) by a screw thread. When the driver (73) rotates, the moving tray (72) moves out from under the X-axis tool holder drive assembly (5) with the assistance of the rollers (721). At the same time, the collection tray (71) is also brought out. The collection tray (71) moves relative to the moving tray (72) with the assistance of the rollers (711), thereby enabling the scrap collection assembly (7) to be cleaned.

3. A heavy-duty CNC horizontal lathe with a multi-functional protective cover according to claim 2, characterized in that: The driver (73) is controlled by a CNC system. Each of the four rollers (711) symmetrically arranged on the collection tray (71) is equipped with a pressure sensor (7111). The pressure sensor (7111) feeds back a signal to the CNC system, and the CNC system sends a command to the driver (73).

4. A heavy-duty CNC horizontal lathe with a multi-functional protective cover according to claim 1, characterized in that, The processing area protective cover (82) includes a left cover (821) and a right cover (822). The inner wall surface of the left cover (821) is in clearance fit with the outer wall surface of the spindle box protective cover (81), and the inner wall surface of the right cover (822) is in clearance fit with the upper outer wall surface of the tailstock protective cover (83).

5. A heavy-duty CNC horizontal lathe with a multi-functional protective cover according to claim 4, characterized in that, The processing area protective cover (82) is slidably connected to the spindle box protective cover (81) and the tailstock protective cover (83) via a slide rod (9). The left and right ends of the slide rod (9) are fixed to the spindle box protective cover (81) and the tailstock protective cover (83) respectively by several brackets (1A). A left slider (1B) and a right slider (1C) are also slidably arranged on the slide rod (9). The left slider (1B) is fixed to the left cover (821), and the right slider (1C) is fixed to the right cover (822).

6. A heavy-duty CNC horizontal lathe with a multi-functional protective cover according to claim 1, characterized in that, The Z-axis drive assembly (4) includes a Z-axis motor (41), a coupling (42), a Z-axis lead screw (43), a left bearing housing (44), and a right bearing housing (45). The left bearing housing (44) and the right bearing housing (45) are respectively fixed to the left and right ends of the bed (1). The Z-axis motor (41) is fixed on the left bearing housing (44). The coupling (42) connects the Z-axis motor (41) and one end of the Z-axis lead screw (43). The other end of the Z-axis lead screw (43) is rotatably mounted on the right bearing housing (45). The X-axis tool post drive assembly (5) and the Z-axis lead screw (43) of the Z-axis drive assembly (4) are connected by a thread. When the Z-axis motor (41) drives the rotation, the coupling (42) connected to the Z-axis motor (41) drives the Z-axis lead screw (43) to rotate. The Z-axis lead screw (43) transmits the rotational force to the X-axis tool post drive assembly (5), thereby driving the X-axis tool post drive assembly (5) to move on the trapezoidal slide rail (11).

7. A heavy-duty CNC horizontal lathe with a multi-functional protective cover according to claim 1, characterized in that, The tailstock pin assembly (6) is mounted on the trapezoidal slide rail (11) via a lower slide plate (61) and an upper slide block (62). The lower slide plate (61) is in contact with the right angle surface (111) of the trapezoidal slide rail (11). The upper slide block (62) is provided with a hinge (621), and the lower slide plate (61) is provided with a static buckle (611) that can cooperate with the hinge (621). A locking nut post (612) is also provided through the lower slide plate (61) and the upper slide block (62). A nut (613) is fixed at the top of the locking nut post (612). The locking nut post (612) locks the lower slide plate (61), the upper slide block (62) and the trapezoidal slide rail (11) by rotating the nut (613).

8. A heavy-duty CNC horizontal lathe with a multi-functional protective cover according to claim 1, characterized in that, A heightening pad (2) is also provided between the spindle box assembly (3) and the bed (1), and the spindle box assembly (3) is fixed on the heightening pad (2); the spindle box assembly (3) includes a drive device (31), a speed change system (32), and a hydraulic indexing chuck (33). The drive device (31) is connected to the speed change system (32) for transmission, and the hydraulic indexing chuck (33) is connected to the output end of the speed change system (32).

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