A lathe spindle center hole opening device

Abstract

The present invention discloses a lathe spindle center hole drilling device, comprising a spindle box, a lathe spindle rotatably connected therein, a chuck connected to one end of the lathe spindle, a plurality of claws evenly connected to the chuck, a workpiece mounted in the claws, a mounting cavity provided in the lathe spindle, an inner shaft rotatably connected therein, a hollow cavity provided in the inner shaft, an end of the coupling extending away from the cylinder seat into the hollow cavity and connected thereto with a connecting nut, a connecting rod connected therein, a Morse sleeve connected to the other end of the connecting rod, a Morse taper connected therein, a drill chuck connected to the end of the Morse taper near the chuck, and a center drill connected therein. Compared with the prior art, the present invention has the advantages of novel structure, reasonable design, low labor intensity, and high production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of machining, in particular to a device for drilling a center hole of a main shaft of a lathe. Background Art

[0002] When processing shaft parts, it is often necessary to drill center holes on the end faces of parts. At present, there is no standard equipment directly used for drilling center holes except for special machines such as double-sided milling and machining centers. Drilling center holes on lathes needs to be separated from steps such as turning the outer circle and turning the end face. In particular, the center hole is generally selected as the positioning and processing reference of shaft parts. At present, most of them are processed on lathes. In addition to double-sided milling, shaft parts must be supported by a center frame to drill center holes. Not only does it require repeated clamping and labor-intensive drilling, but center holes in large shaft parts are especially time-consuming and labor-intensive. In order to improve the quality and efficiency of center hole drilling, some companies have made special center hole drilling equipment, but it must increase power consumption and require a separate frame (or body) to occupy a certain workshop space. All current solutions require repeated clamping or moving the tailstock or support center frame to proceed, and their processing efficiency is low and the labor intensity is high, which cannot meet production needs. Therefore, there is an urgent need for a lathe spindle center hole drilling device. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the above technical problems and provide a lathe spindle center hole drilling device with novel structure, reasonable design, low labor intensity and high production efficiency.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is: a lathe spindle center hole drilling device, comprising a spindle box, a lathe spindle is rotatably connected in the spindle box, a chuck is connected to one end of the lathe spindle, a plurality of claws are evenly connected to the chuck, a workpiece is installed in the claws, a mounting cavity is provided in the lathe spindle, an inner shaft is rotatably connected in the mounting cavity, a cylinder seat is connected to the end of the spindle box away from the chuck, a cylinder is installed on the cylinder seat, a coupling key is connected in the cylinder seat, a coupling is connected to the coupling key, the A piston rod is connected in the cylinder, and the piston rod is connected to the coupling through a coupling bolt. A hollow cavity is provided in the inner shaft, and the end of the coupling away from the cylinder seat extends into the hollow cavity and is connected with a connecting nut. A connecting rod is connected in the connecting nut, and the other end of the connecting rod is connected with a Morse sleeve, and a guide key is connected on the Morse sleeve, and a guide sleeve is connected on the guide key. A limit nut is connected at the end of the inner shaft close to the chuck, and a Morse taper is connected in the Morse sleeve. The end of the Morse taper close to the chuck is connected with a drill chuck, and a center drill is connected to the drill chuck.

[0005] As an improvement, the left and right connections between the lathe spindle and the spindle box are respectively connected with a left spindle bearing and a right spindle bearing, and a box bearing cover is connected to one end of the right spindle bearing on the spindle box.

[0006] As an improvement, the left and right connections between the inner shaft and the lathe spindle are respectively connected with a left bearing and a right bearing. The left end of the lathe spindle is connected with a left baffle through a left baffle bolt, and the right end of the lathe spindle is connected with a right baffle through a right baffle bolt.

[0007] As an improvement, the connecting rod includes a sleeve, a connecting pipe is connected to the sleeve, a nut is connected to the other end of the connecting pipe, a mounting hole is provided on the sleeve, a countersunk bolt is connected in the mounting hole, and the countersunk bolt is used in conjunction with a Morse sleeve.

[0008] As an improvement, a connecting rod key is provided between the connecting rod and the Morse sleeve.

[0009] As an improvement, the guide key is connected with a plurality of countersunk screws, and the countersunk screws are used in conjunction with Morse sleeves.

[0010] As an improvement, the limiting nut is fixed to the inner shaft by a locking screw, and a through hole is provided on the limiting nut.

[0011] After adopting the above structure, the present invention has the following advantages: the present invention has a novel structure and a reasonable design. The center drill is installed on the inner shaft, and the center hole is directly punched during the processing by the cylinder control. Compared with punching the center hole on the tailstock of the lathe, it reduces the repeated clamping of parts and the movement of the tailstock and the replacement of the drill chuck. For shaft parts, the center hole can be directly punched without the need for a support center frame, which greatly reduces the labor intensity of the operator and can greatly improve the production efficiency. The cylinder is controlled by an external foot switch and can be placed at any position required by the operator. The flow, pressure and stroke of the cylinder are adjusted to control the time required to punch the center hole. The device has the advantages of high speed and depth, simple operation and high work efficiency. The device is directly installed in the lathe spindle, and its accuracy is determined by the manufacturing accuracy of the device. The accuracy of drilling the center hole on the tailstock depends on the concentricity of the tailstock and the spindle. The device reduces the processing error caused by the system error. The accuracy of drilling the center hole on the inner shaft is higher than that of drilling the center hole on the tailstock. The center hole on the lathe tailstock is fed by the operator rotating the tailstock handle. The continuity and stability depend on the physical fitness and skills of the operator. The center hole on the inner shaft is controlled by adjusting the air pressure and stroke of the cylinder. It has good stability and consistency and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a lathe spindle center hole drilling device of the present invention.

[0013] Figure 2 It is a structural schematic diagram of a cylinder seat in a lathe spindle center hole drilling device of the present invention.

[0014] Figure 3 This is a structural diagram of the connecting rod in a lathe spindle center hole opening device of the present invention.

[0015] As shown in the figure: 1. Spindle box; 2. Lathe spindle; 3. Chuck; 4. Clamping claw; 5. Workpiece; 6. Mounting cavity; 7. Inner shaft; 8. Cylinder seat; 9. Cylinder; 10. Coupling key; 11. Coupling; 12. Piston rod; 13. Coupling bolt; 14. Hollow cavity; 15. Connecting nut; 16. Connecting rod; 17. Morse sleeve; 18. Guide key; 19. Guide sleeve; 20. Limit nut; 21. Morse taper; 22. Drill chuck; 23. Center drill; 24. Left spindle bearing; 25. Right spindle bearing; 26. Box bearing cover; 27. Left bearing; 28. Right bearing; 29. ​​Left baffle bolt; 30. Left baffle; 31. Right baffle bolt; 32. Right baffle; 33. Sleeve; 34. Connecting pipe; 35. Nut; 36. Mounting hole; 37. Countersunk bolt; 38. Connecting rod key; 39. Countersunk screw; 40. Locking screw; 41. Through hole. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "inside", "outside", "center", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction structure and operation, and therefore cannot be understood as a limitation on the present invention.

[0017] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "provided with," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0018] The present invention will be described in further detail below with reference to the accompanying drawings.

[0019] Combined with attachment Figure 1-3, a lathe spindle center hole drilling device, comprising a spindle box 1, a lathe spindle 2 is rotatably connected in the spindle box 1, a chuck 3 is connected to one end of the lathe spindle 2, a plurality of claws 4 are evenly connected to the chuck 3, a workpiece 5 is installed in the claw 4, a mounting cavity 6 is provided in the lathe spindle 2, an inner shaft 7 is rotatably connected in the mounting cavity 6, a cylinder seat 8 is connected to the end of the spindle box 1 away from the chuck 3, a cylinder 9 is installed on the cylinder seat 8, a coupling key 10 is connected in the cylinder seat 8, a coupling 11 is connected to the coupling key 10, a piston rod 12 is connected in the cylinder 9, and the piston rod 12 is connected through the coupling The shaft bolt 13 is connected to the coupling 11, and a hollow cavity 14 is provided in the inner shaft 7. The end of the coupling 11 away from the cylinder seat 8 extends into the hollow cavity 14 and is connected to a connecting nut 15. A connecting rod 16 is connected to the connecting nut 15, and the other end of the connecting rod 16 is connected to a Morse sleeve 17. A guide key 18 is connected to the Morse sleeve 17, and a guide sleeve 19 is connected to the guide key 18. The end of the inner shaft 7 close to the chuck 3 is connected to a limit nut 20, and a Morse cone 21 is connected to the Morse sleeve 17. The end of the Morse cone 21 close to the chuck 3 is connected to a drill chuck 22, and a center drill 23 is connected to the drill chuck 22.

[0020] The left and right connections between the lathe spindle 2 and the spindle box 1 are respectively connected with a left spindle bearing 24 and a right spindle bearing 25. The spindle box 1 is connected to one end of the right spindle bearing 25 with a box bearing cover 26. The left and right connections between the inner shaft 7 and the lathe spindle 2 are respectively connected with a left bearing 27 and a right bearing 28. The left end of the lathe spindle 2 is connected with a left baffle 30 through a left baffle bolt 29, and the right end of the lathe spindle 2 is connected with a right baffle 32 through a right baffle bolt 31. The connecting rod 16 includes a sleeve 33, which is connected to the sleeve 33. A connecting tube 34 is provided, and a nut 35 is connected to the other end of the connecting tube 34. A mounting hole 36 is provided on the sleeve 33, and a countersunk bolt 37 is connected in the mounting hole 36. The countersunk bolt 37 is used in conjunction with the Morse sleeve 17. A connecting rod key 38 is connected between the connecting rod 16 and the Morse sleeve 17. A plurality of countersunk screws 39 are connected on the guide key 18. The countersunk screws 39 are used in conjunction with the Morse sleeve 17. The limiting nut 20 is fixed to the inner shaft 7 by a locking screw 40, and a center hole 41 is provided on the limiting nut 20.

[0021] When the present invention is implemented, according to the size of the center hole to be drilled, a suitable center drill 23 is selected and then the center drill 23 is installed on the drill chuck 22, the jaws 4 are opened, the workpiece 5 to be processed is installed on the chuck 3, the workpiece 5 is fixed with the jaws 4, and the external power is turned on to rotate the lathe spindle 2. Because the cylinder seat 8 and the coupling 11 are connected by the coupling key 10, and the left bearing 27 and the right bearing 28 are connected between the inner shaft 7 and the lathe spindle 2, the inner shaft 7 will not rotate relative to the spindle box 1, but the lathe spindle 2 and the inner shaft 7 rotate relative to each other, that is, the inner shaft 7 and the center drill 23 rotate relative to the workpiece 5. The speed and depth required for drilling the center hole are controlled by controlling the flow, pressure and stroke of the cylinder 9, and the piston rod 12 will push the center drill 23 to drill the center hole of the workpiece. The operation is simple, the work efficiency is high, and the practicality is good.

[0022] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A lathe spindle center hole drilling device, comprising a spindle box (1), characterized in that: A lathe spindle (2) is rotatably connected in the spindle box (1), a chuck (3) is connected to one end of the lathe spindle (2), a plurality of claws (4) are evenly connected to the chuck (3), a workpiece (5) is installed in the claws (4), a mounting cavity (6) is provided in the lathe spindle (2), an inner shaft (7) is rotatably connected in the mounting cavity (6), a cylinder seat (8) is connected to the end of the spindle box (1) away from the chuck (3), a cylinder (9) is installed on the cylinder seat (8), a coupling key (10) is connected to the cylinder seat (8), a coupling (11) is connected to the coupling key (10), a piston rod (12) is connected to the cylinder (9), and the piston rod (12) is connected to the coupling ( 11), a hollow cavity (14) is provided in the inner shaft (7), one end of the coupling (11) away from the cylinder seat (8) extends into the hollow cavity (14) and is connected with a connecting nut (15), a connecting rod (16) is connected in the connecting nut (15), the other end of the connecting rod (16) is connected with a Morse sleeve (17), a guide key (18) is connected on the Morse sleeve (17), a guide sleeve (19) is connected on the guide key (18), a limiting nut (20) is connected at one end of the inner shaft (7) close to the chuck (3), a Morse cone (21) is connected in the Morse sleeve (17), a drill chuck (22) is connected at one end of the Morse cone (21) close to the chuck (3), and a center drill (23) is connected on the drill chuck (22); The left and right connecting portions of the lathe spindle (2) and the spindle box (1) are respectively connected with a left spindle bearing (24) and a right spindle bearing (25), and a box bearing cover (26) is connected to one end of the right spindle bearing (25) on the spindle box (1); The left and right connecting portions of the inner shaft (7) and the lathe spindle (2) are respectively connected to a left bearing (27) and a right bearing (28); the left end of the lathe spindle (2) is connected to a left baffle (30) via a left baffle bolt (29); and the right end of the lathe spindle (2) is connected to a right baffle (32) via a right baffle bolt (31); The connecting rod (16) includes a sleeve (33), a connecting pipe (34) is connected to the sleeve (33), a nut (35) is connected to the other end of the connecting pipe (34), a mounting hole (36) is provided on the sleeve (33), a countersunk bolt (37) is connected in the mounting hole (36), and the countersunk bolt (37) is used in conjunction with the Morse sleeve (17); A connecting rod key (38) is provided between the connecting rod (16) and the Morse sleeve (17).

2. The lathe spindle center hole drilling device according to claim 1, characterized in that: The guide key (18) is connected with a plurality of countersunk screws (39), and the countersunk screws (39) are used in conjunction with the Morse sleeve (17).

3. The lathe spindle center hole drilling device according to claim 1, characterized in that: The limiting nut (20) is fixed on the inner shaft (7) via a locking screw (40), and a through hole (41) is provided on the limiting nut (20).

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