Double-tool-turret double-motorized-spindle horizontal lathe for machining circumference and two end faces of lathe long shaft

Abstract

The invention relates to the technical field of turning, and discloses a double-turret double-motorized-spindle horizontal lathe used for machining the circumference and two end faces of a lathe long shaft, the double-turret double-motorized-spindle horizontal lathe comprises a lathe body, an adjusting assembly is arranged at the front end of the lathe body, and driving structures are fixedly installed on the left side of the lathe body and the bottom end of the adjusting assembly. The two ends of a long-shaft workpiece are clamped through the outer circular ring, the two ejector pins abut against the two ends of the long-shaft workpiece correspondingly for clamping, at the moment, the clamping jaw does not make contact with the long-shaft workpiece, turning can be conducted on the two ends of the long-shaft workpiece, after the clamping position of the clamping jaw is turned, the oil cylinder drives the connecting rod and the moving rod to move, and the long-shaft workpiece can be turned. The pin drives the moving body and the clamping jaw to stretch out and clamp the end which is turned just now, then the surface area of the middle of the long-axis workpiece is turned, in the whole turning process, the long-axis workpiece does not need to be taken down and clamped again, errors caused by multiple times of clamping are avoided, and turning precision is improved.

Description

Technical Field

[0001] This invention relates to the field of turning technology, and more specifically, to a double-turret, double-electric-spindle horizontal lathe for machining the circumference and two end faces of a long shaft. Background Technology

[0002] Double-turret horizontal lathes for turning long shafts around their circumference and both end faces are suitable for batch or mass production of various shaft parts such as motor shafts, crankshafts, camshafts, and stepped shafts. Turning the circumference and both end faces of long shafts is performed simultaneously by two turrets, resulting in stable precision and high production efficiency. Currently, there are virtually no integrated double-turret lathes for turning long shafts around their circumference and both end faces. Most existing lathes perform a single turning step, requiring a change of machine and re-clamping to complete the next step (older conventional lathes use a chuck and tailstock center: one end is held by a chuck, and the other end is supported by a tailstock center). With the increasing use of high-precision long shaft parts, conventional lathes have many processing steps, resulting in long processing times and low precision, making it difficult to meet customer requirements. For long shaft products, they also suffer from drawbacks such as heavy weight and difficulty in changing clamps. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a double-turret, double-electric spindle horizontal lathe for machining the circumference and two end faces of a long shaft, which has the advantages of high machining accuracy and no need to change clamps.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a double-turret, double-electric spindle horizontal lathe for machining the circumference and two end faces of a long shaft, comprising a lathe body, an adjustment component at the front end of the lathe body, a drive structure fixedly installed on the left side of the lathe body and the bottom end of the adjustment component, and a chuck assembly fixedly installed at the end of the drive structure near the center of the lathe body. The drive structure includes a housing, a stator is fixedly installed on the inner wall of the housing, a rotor is rotatably connected to the middle of the stator, a hydraulic cylinder is fixedly installed at the left end of the housing, a connecting rod is fixedly installed at the output end of the hydraulic cylinder, a moving rod is rotatably connected to the end of the connecting rod near the center of the lathe body, a rotating sleeve is slidably connected to the surface of the moving rod, and the rotating sleeve is fixedly installed inside the rotor. The chuck assembly includes a chuck body, which is rotatably connected to the right side of the housing. A pin is engaged with the right end of the chuck body, and an outer ring is fixedly installed on the right end of the chuck body.

[0005] As a preferred embodiment of the present invention, the adjustment component includes a slide rail and a linear motor structure, wherein the linear motor structure is drivenly connected to the slide rail, and the outer casing on the right side is fixedly installed at the bottom of the linear motor structure.

[0006] As a preferred embodiment of the present invention, the inner cavity of the chuck body is slidably connected with a jaw and a movable body, the movable body is fixedly connected to the jaw, and the movable body is fixedly connected to a movable rod by a pin.

[0007] As a preferred embodiment of the present invention, a slide bar is fixedly installed on the surface of the movable rod, and the slide bar is slidably connected inside the rotating sleeve.

[0008] As a preferred embodiment of the present invention, an indicator component is fixedly installed at both the front and rear ends of the chuck assembly. The indicator component includes a fixed tube, which is fixedly installed at both the front and rear ends of the chuck body and located within the chuck body. A movable shaft is slidably connected to the inner cavity of the fixed tube, and a fixed ring is fixedly installed in the inner cavity of the fixed tube. A spring is fixedly installed between the movable shaft and the fixed ring. A through hole is opened in the inner cavity of the ejector pin, and a one-way air inlet pipe is fixedly installed at the right end of the chuck body.

[0009] As a preferred embodiment of the present invention, the movable shaft is composed of a circular plate and a circular shaft. The circular plate is fixedly connected to a spring, the circular shaft is located inside the spring, and a limit ring is fixedly installed at one end of the circular plate near the fixed ring.

[0010] As a preferred embodiment of the present invention, the indicating component includes an adding component, which includes a connecting pipe and a communicating hole. The connecting pipe is fixedly installed at the top end of the fixed pipe, and the communicating hole is opened inside the moving shaft.

[0011] As a preferred embodiment of the present invention, a sealing cap is engaged with the area of ​​the fixed tube extending outside the chuck body, and the end face of the sealing cap is made of glass.

[0012] As a preferred embodiment of the present invention, the movable shaft is provided with a positioning component, the positioning component includes a slider, the slider is fixedly installed at the upper and lower ends of the movable shaft, and the upper and lower ends of the inner cavity of the fixed tube are provided with sliding grooves, the slider is slidably connected in the sliding grooves.

[0013] As a preferred embodiment of the present invention, the lathe body is further provided with a lathe center rest, which is located on the side of the chuck assembly near the center of the lathe body.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses an outer ring and ejector pins. The outer ring clamps both ends of a long shaft workpiece, and two ejector pins hold the workpiece at both ends. At this time, the jaws do not contact the long shaft workpiece, allowing for turning of both ends. After the jaws are machined to the desired clamping position, the hydraulic cylinder drives the connecting rod and the moving rod to move. This, in turn, drives the moving body and jaws to extend and clamp the machined ends via pins. Subsequently, the middle surface area of ​​the long shaft workpiece is machined. During the entire machining process, the long shaft workpiece does not need to be removed and re-clamped, avoiding errors caused by multiple clamping and thus improving machining accuracy.

[0015] 2. This invention features a movable shaft within a fixed tube. A spring applies a force to the movable shaft towards the center of the chuck body. When the jaws release the gripper from the long shaft workpiece, the movable shaft moves to the left relative to the chuck body. At this time, outside air is drawn into the chuck body through a one-way air inlet and a through hole. When the jaws grip the end of the long shaft workpiece, the movable shaft moves to the right, forcing air into the fixed tube. After repeated use, the movable shaft is forced out. When the movable shaft extends out of the fixed tube, an indicator device indicates that lubricating oil needs to be added. When the movable shaft is fully extended, the sealing cap is unscrewed, aligning the top of the connecting hole with the connecting tube. Lubricating oil can then be added to the chuck body through the front end of the connecting hole. This allows for lubrication of the device without disassembly, making operation simple, convenient, and easy to maintain. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front sectional view of the structural drive structure and chuck assembly of the present invention; Figure 3 This is a left-side schematic diagram of the moving rod and rotating sleeve of the present invention; Figure 4 This is a front view of the moving rod and rotating sleeve of the present invention; Figure 5 This is a top-view cross-sectional perspective view of the chuck assembly of the present invention; Figure 6 This is a cross-sectional schematic diagram of the fixing tube structure of the present invention; Figure 7 This is an exploded cross-sectional view of the moving axis connection of the structure of the present invention.

[0017] In the diagram: 1. Lathe body; 2. Adjustment assembly; 21. Slide rail; 22. Linear motor structure; 3. Drive structure; 31. Housing; 32. Stator; 33. Rotor; 34. Hydraulic cylinder; 35. Connecting rod; 36. Moving rod; 37. Rotating sleeve; 38. Slide bar; 39. Pin; 4. Chuck assembly; 41. Chuck body; 42. Outer ring; 43. Gripper; 44. Moving body; 45. Ejector pin; 5. Indicating assembly; 51. Fixed tube; 52. Moving shaft; 53. Fixed ring; 54. Spring; 55. Limiting ring; 56. Through hole; 57. One-way air inlet pipe; 6. Adding assembly; 61. Connecting pipe; 62. Connecting hole; 7. Positioning assembly; 71. Slider; 72. Slide groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 7 As shown, the present invention provides a double-turret double-electric spindle horizontal lathe for machining the circumference and two end faces of a long shaft, including a lathe body 1, an adjustment component 2 is provided at the front end of the lathe body 1, a drive structure 3 is fixedly installed on the left side of the lathe body 1 and the bottom end of the adjustment component 2, and a chuck assembly 4 is fixedly installed at the end of the drive structure 3 near the center of the lathe body 1. The drive structure 3 includes a housing 31, a stator 32 is fixedly installed on the inner wall of the housing 31, a rotor 33 is rotatably connected to the middle of the stator 32, a hydraulic cylinder 34 is fixedly installed on the left end of the housing 31, a connecting rod 35 is fixedly installed on the output end of the hydraulic cylinder 34, a moving rod 36 is rotatably connected to the end of the connecting rod 35 near the center of the lathe body 1, a rotating sleeve 37 is slidably connected to the surface of the moving rod 36, and the rotating sleeve 37 is fixedly installed inside the rotor 33; The chuck assembly 4 includes a chuck body 41, which is rotatably connected to the right side of the housing 31. A pin 45 is engaged with the right end of the chuck body 41, and an outer ring 42 is fixedly installed on the right end of the chuck body 41.

[0020] By setting an outer ring 42 and ejector pins 45, the outer ring 42 clamps both ends of the long shaft workpiece, and the two ejector pins 45 respectively press against both ends of the long shaft workpiece for clamping. At this time, the jaws 43 do not contact the long shaft workpiece, and the two ends of the long shaft workpiece can be turned. After the clamping position of the jaws 43 is turned, the hydraulic cylinder 34 drives the connecting rod 35 and the moving rod 36 to move, and then the pin 39 drives the moving body 44 and the jaws 43 to extend and clamp on the just-turned ends. Then the middle surface area of ​​the long shaft workpiece is turned. During the entire turning process, it is not necessary to remove and re-clamp the long shaft workpiece, avoiding errors caused by multiple clamping, thereby improving the turning accuracy.

[0021] The adjustment component 2 includes a slide rail 21 and a linear motor structure 22. The linear motor structure 22 is connected to the slide rail 21, and the right outer casing 31 is fixedly installed at the bottom of the linear motor structure 22.

[0022] By setting up a linear motor structure 22, the linear motor structure 22 can drive the drive structure 3 on the right side to move left and right as a whole under the guidance of the slide rail 21, so as to adjust the distance between the two drive structures 3 and realize the machining and turning operation of long shaft workpieces with different length values ​​(this is the prior art and will not be described in detail here).

[0023] The chuck body 41 has a slidably connected gripper 43 and a movable body 44 in its inner cavity. The movable body 44 is fixedly connected to the gripper 43 and is fixedly connected to the movable rod 36 by a pin 39.

[0024] The movable body 44 is connected to the gripper 43, which can move the movable body 44 and the gripper 43 to the left or right when the movable rod 36 moves, so as to position and cancel the clamping of the long shaft workpiece.

[0025] Among them, a slide bar 38 is fixedly installed on the surface of the movable rod 36, and the slide bar 38 is slidably connected inside the rotating sleeve 37.

[0026] During the turning operation, the rotor 33 inside the stator 32 rotates, which in turn drives the rotating sleeve 37 to rotate. The sliding bar 38 drives the moving rod 36 to rotate. Since the moving rod 36 is slidably connected inside the rotating sleeve 37, it can slide inside the rotating sleeve 37, allowing the moving rod 36 to slide laterally or be driven to rotate by the rotating sleeve 37.

[0027] The chuck assembly 4 has indicator components 5 fixedly installed at both ends. The indicator components 5 include a fixed tube 51, which is fixedly installed at both ends of the chuck body 41 and located inside the chuck body 41. A moving shaft 52 is slidably connected to the inner cavity of the fixed tube 51. A fixed ring 53 is fixedly installed in the inner cavity of the fixed tube 51. A spring 54 is fixedly installed between the moving shaft 52 and the fixed ring 53. A through hole 56 is opened in the inner cavity of the ejector pin 45. A one-way air inlet pipe 57 is fixedly installed at the right end of the chuck body 41.

[0028] By setting a movable moving shaft 52 inside the fixed tube 51, and using a spring 54 to apply a force to the moving shaft 52 toward the center of the chuck body 41, when the gripper 43 releases its grip on the long shaft workpiece, the moving body 44 moves to the left relative to the chuck body 41. At this time, outside air is drawn into the chuck body 41 through the one-way air inlet pipe 57 and the through hole 56. When the gripper 43 is used to clamp the end of the long shaft workpiece, the moving body 44 moves to the right, squeezing air into the fixed tube 51. After multiple uses, the moving shaft 52 is squeezed out. When the moving shaft 52 extends out of the fixed tube 51, the indicator device needs to add lubricating oil.

[0029] The movable shaft 52 consists of a circular plate and a circular shaft. The circular plate is fixedly connected to the spring 54, and the circular shaft is located inside the spring 54. A limit ring 55 is fixedly installed at one end of the circular plate near the fixed ring 53.

[0030] By setting a limiting ring 55, the overall movement of the moving shaft 52 is positioned and guided, ensuring that the limiting ring 55 contacts the fixed ring 53 after the moving shaft 52 moves to the limit position, thereby limiting the movement of the moving shaft 52 and aligning the connecting hole 62 with the connecting pipe 61.

[0031] The indicator component 5 includes an addition component 6, which includes a connecting pipe 61 and a connecting hole 62. The connecting pipe 61 is fixedly installed at the top of the fixed pipe 51, and the connecting hole 62 is opened in the moving shaft 52.

[0032] When the movable shaft 52 is fully extended, the top of the connecting hole 62 is aligned with the coupling tube 61, at which point lubricating oil can be added into the chuck body 41 through the front end of the connecting hole 62.

[0033] The area of ​​the fixed tube 51 extending outside the chuck body 41 is engaged with a sealing cap (not shown in the figure, located outside the chuck body 41 and detachably engaged with the end of the fixed tube 51 by threads), and the end face of the sealing cap is made of glass.

[0034] The sealing cap is used to seal the fixed tube 51 to prevent the lubricating oil in the chuck body 41 from flowing out, and its end face is made of glass so that the extension state of the moving shaft 52 can be better observed.

[0035] The movable shaft 52 is provided with a positioning component 7, which includes a slider 71. The slider 71 is fixedly installed at the upper and lower ends of the movable shaft 52. The upper and lower ends of the inner cavity of the fixed tube 51 are provided with sliding grooves 72, and the slider 71 is slidably connected in the sliding grooves 72.

[0036] By setting up slider 71 and slide groove 72, the movement of movable shaft 52 can be positioned and guided, ensuring that movable shaft 52 can only slide back and forth and cannot deflect.

[0037] The lathe body 1 is also equipped with a lathe center rest, which is located on the side of the chuck assembly 4 near the center of the lathe body 1.

[0038] The lathe features an independently servo-movable center rest with hydraulic self-centering support, facilitating easy clamping and providing strong clamping force (this is existing technology and will not be elaborated further). The lathe body 1 adopts an integrated design with a single-piece cast slant bed. The machine tool's internal structure utilizes honeycomb reinforcement to ensure high rigidity. Resin sand casting, followed by two aging treatments, ensures excellent casting stability. A wide guideway spacing design, using extended sliders to increase the guideway envelope length, provides excellent mechanical stability and rigidity. The inclined chip conveyor design ensures smooth chip removal. The entire machine utilizes a Siemens 828D dual-channel CNC system with absolute encoder servo motors. It features fully enclosed inner and outer protection, with the inner protection made of stainless steel, effectively isolating the machining area, protecting the motor, and ensuring excellent recovery of chips and cutting fluid. It also facilitates machine tool cleaning and maintenance. An automatic chip conveyor is standard, employing a forward scraper conveyor and a backflushing roller filtration system. Based on the user's workshop layout, a front-mounted side chip removal system is adopted; and a dual-turret system is used, with each turret having independent servo movement, which can respectively complete the instructions of the CNC system to perform turning, thereby improving production efficiency.

[0039] Working principle and usage process of this invention: First, the long shaft workpiece is placed on the lathe center rest for positioning and centering. Then, the linear motor structure 22 drives the drive structure 3 on the right to move, so that the two ejector pins 45 press against the two ends of the long shaft workpiece respectively. At this time, the outer ring 42 supports the long shaft workpiece, and the rotor 33 in the stator 32 rotates, which in turn drives the rotating sleeve 37 to rotate. The sliding bar 38 drives the moving rod 36 to rotate. Since the moving rod 36 is slidably connected in the rotating sleeve 37, it can slide in the rotating sleeve 37. The moving rod 36 can slide laterally or be driven to rotate by the rotating sleeve 37. At this time, the moving rod 36 does not slide, but only rotates. The two ends of the long shaft workpiece are machined to machine the clamping area of ​​the chuck 43. Subsequently, the moving rod 36, driven by the hydraulic cylinder 34 and the connecting rod 35, moves the moving body 44 and the gripper 43, causing the gripper 43 to extend and clamp the end that was just cut out, and then the non-end area of ​​the long shaft workpiece is turned. After turning is completed, the jaws 43 retract and release the grip on the long shaft workpiece. At this time, the moving body 44 moves to the left relative to the chuck body 41. At this time, outside air is drawn into the chuck body 41 through the one-way air inlet pipe 57 and the through hole 56. When the jaws 43 are used to grip the end of the long shaft workpiece, the moving body 44 moves to the right, squeezing the air into the fixed tube 51. After multiple uses, the moving shaft 52 is squeezed out. When the moving shaft 52 extends out of the fixed tube 51, the indicator device needs to add lubricating oil.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-turret, double-electric-spindle horizontal lathe for machining the circumference and two end faces of a long shaft, comprising a lathe body (1), characterized in that: The lathe body (1) is provided with an adjustment component (2) at the front end. A drive structure (3) is fixedly installed on the left side of the lathe body (1) and the bottom of the adjustment component (2). A chuck component (4) is fixedly installed at one end of the drive structure (3) near the center of the lathe body (1). The drive structure (3) includes a housing (31), a stator (32) is fixedly installed on the inner wall of the housing (31), a rotor (33) is rotatably connected to the middle of the stator (32), a hydraulic cylinder (34) is fixedly installed on the left end of the housing (31), a connecting rod (35) is fixedly installed on the output end of the hydraulic cylinder (34), a moving rod (36) is rotatably connected to one end of the connecting rod (35) near the center of the lathe body (1), a rotating sleeve (37) is slidably connected to the surface of the moving rod (36), and the rotating sleeve (37) is fixedly installed inside the rotor (33); The chuck assembly (4) includes a chuck body (41), which is rotatably connected to the right side of the outer shell (31). A pin (45) is engaged with the right end of the chuck body (41), and an outer ring (42) is fixedly installed on the right end of the chuck body (41).

2. The double-turret, double-electric-spindle horizontal lathe for machining the circumference and two end faces of a long shaft according to claim 1, characterized in that: The adjustment component (2) includes a slide rail (21) and a linear motor structure (22). The linear motor structure (22) is connected to the slide rail (21) for transmission, and the outer shell (31) on the right side is fixedly installed at the bottom of the linear motor structure (22).

3. The double-turret, double-electric-spindle horizontal lathe for machining the circumference and two end faces of a long shaft according to claim 1, characterized in that: The inner cavity of the chuck body (41) is slidably connected with a jaw (43) and a moving body (44). The moving body (44) is fixedly connected to the jaw (43), and the moving body (44) is fixedly connected to the moving rod (36) by a pin (39).

4. The double-turret, double-electric-spindle horizontal lathe for machining the circumference and two end faces of a long shaft according to claim 1, characterized in that: A slide bar (38) is fixedly installed on the surface of the moving rod (36), and the slide bar (38) is slidably connected inside the rotating sleeve (37).

5. The double-turret, double-electric-spindle horizontal lathe for machining the circumference and two end faces of a long shaft according to claim 1, characterized in that: Indicator components (5) are fixedly installed at both ends of the chuck assembly (4). The indicator components (5) include a fixed tube (51). The fixed tube (51) is fixedly installed at both ends of the chuck body (41) and located inside the chuck body (41). A moving shaft (52) is slidably connected to the inner cavity of the fixed tube (51). A fixed ring (53) is fixedly installed in the inner cavity of the fixed tube (51). A spring (54) is fixedly installed between the moving shaft (52) and the fixed ring (53). A through hole (56) is opened in the inner cavity of the ejector pin (45). A one-way air inlet pipe (57) is fixedly installed at the right end of the chuck body (41).

6. The double-turret, double-electric-spindle horizontal lathe for machining the circumference and two end faces of a long shaft according to claim 5, characterized in that: The movable shaft (52) is composed of a circular plate and a circular shaft. The circular plate is fixedly connected to the spring (54), and the circular shaft is located inside the spring (54). A limit ring (55) is fixedly installed at one end of the circular plate near the fixed ring (53).

7. The double-turret, double-electric-spindle horizontal lathe for machining the circumference and two end faces of a long shaft according to claim 5, characterized in that: The indicator component (5) is provided with an addition component (6), which includes a connecting pipe (61) and a connecting hole (62). The connecting pipe (61) is fixedly installed at the top of the fixed pipe (51), and the connecting hole (62) is opened in the moving shaft (52).

8. The double-turret, double-electric-spindle horizontal lathe for machining the circumference and two end faces of a long shaft according to claim 5, characterized in that: The area of ​​the fixed tube (51) extending outside the chuck body (41) is engaged with a sealing cap, the end face of which is made of glass.

9. The double-turret, double-electric-spindle horizontal lathe for machining the circumference and end faces of a long shaft according to claim 5, characterized in that: The movable shaft (52) is provided with a positioning component (7), which includes a slider (71). The slider (71) is fixedly installed at the upper and lower ends of the movable shaft (52). The upper and lower ends of the inner cavity of the fixed tube (51) are provided with sliding grooves (72), and the slider (71) is slidably connected in the sliding grooves (72).

10. The double-turret, double-electric-spindle horizontal lathe for machining the circumference and two end faces of a long shaft according to claim 1, characterized in that: The lathe body (1) is also provided with a lathe center frame, which is located on the side of the chuck assembly (4) near the center of the lathe body (1).

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