A sub-axis processing structure for ultra-precision machine tools

Abstract

The utility model discloses a sub-spindle processing structure of an ultra-precision machine tool, including a sub-spindle of the machine tool, a power head mounting seat and a power head; the sub-spindle of the machine tool is mounted on the machine tool bed; the power head mounting seat is fixed on the left or right side of the sub-spindle of the machine tool, and a power head mounting hole for mounting the power head is opened on the power head mounting seat, and the center line of the power head mounting hole is parallel to the center line of the core shaft of the sub-spindle of the machine tool; the power head is inserted into the power head mounting hole, and is driven by the sub-spindle of the machine tool to rotate on the power head mounting seat, and the power head is in the same line with the workpiece clamped by the main spindle of the machine tool installed on the machine tool bed in the use state, and is used for drilling or tapping the end of the workpiece clamped by the main spindle of the machine tool. The utility model increases the feed distance of the workpiece by installing the power head on the sub-spindle of the machine tool, and can drill a hole with a depth greater than 100mm at the end of the workpiece, and can realize the function of tapping in the hole at the end of the workpiece.

Description

Technical Field

[0001] The utility model relates to a secondary shaft processing structure of an ultra-precision machine tool, belonging to the technical field of machine tools. Background Art

[0002] At the end of some rod-shaped workpieces, it is necessary to perform drilling processing or tapping in the hole at the end. In the existing machine tools, the workpiece is clamped by the main spindle of the machine tool, and the workpiece is driven to rotate and feed. The boring tool installed on the column between the main spindle and the auxiliary spindle of the machine tool drills the hole at the end of the workpiece. Since the column itself is fixed on the machine tool bed, the feeding distance of the workpiece is completely determined by the movement of the main spindle of the machine tool, and the movement distance of the main spindle of the machine tool is specific. Therefore, it is difficult for this structure to drill a deeper hole at the end of the workpiece. Generally, the existing machine tools adopt the structural form of boring tool drilling on the column, which can drill holes at the end of the workpiece. It is difficult to process holes with a depth of 50 to 60 mm, while holes larger than 60 mm, such as deep holes over 100 mm, are difficult to process with existing machine tools, and the boring tool itself does not have the function of tapping. After the boring tool has bored a hole, if tapping is required, other tools need to be replaced for processing. Not only is the processing efficiency low, but also the processing accuracy of the workpiece is greatly affected due to the need to reposition the tool when changing the tool. The existing technology installs the boring tool handle on the boring tool seat, and additional accessories must be installed to add power. To process a long workpiece, the movable guide sleeve on the column needs to be removed. The long workpiece lacks the support of the movable guide sleeve in the middle, and the accuracy of the workpiece cannot be guaranteed. Summary of the invention

[0003] The utility model aims to provide a sub-axis processing structure of an ultra-precision machine tool, so as to solve the technical defects in the prior art that a boring cutter installed on a column of a machine tool can only punch a hole less than 60 mm at the end of a rod-shaped workpiece, cannot punch a hole with a depth greater than 60 mm, and cannot perform tapping in the hole.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: a secondary spindle processing structure of an ultra-precision machine tool, including a machine tool secondary spindle, a power head mounting seat and a power head; the machine tool secondary spindle is installed on the machine tool bed; the power head mounting seat is fixed on the machine tool secondary spindle, and a power head mounting hole for installing the power head is opened on the power head mounting seat; the power head is inserted into the power head mounting hole, and is driven by the machine tool secondary spindle to rotate on the power head mounting seat. When in use, the power head is used to process the end of the workpiece clamped by the machine tool main spindle. The utility model installs a power head on the sub-spindle of the machine tool, and the sub-spindle of the machine tool drives the power head to rotate so as to perform processing such as drilling or tapping on the end of the workpiece. Since the sub-spindle of the machine tool itself can move on the machine tool bed, the main spindle of the machine tool clamps the workpiece and drives the workpiece to feed. The movement of the sub-spindle and the main spindle of the machine tool makes the moving distance of the workpiece larger, so that a hole with a larger depth can be drilled at the end of the workpiece. The utility model is particularly suitable for drilling a deep hole of more than 100mm at the end of the workpiece. The utility model adopts a power head, so it can be at the end of the workpiece. The utility model realizes the function that the existing technology using boring tools cannot realize, and the utility model can drill and tap at the same time. Compared with the existing technology, the utility model not only improves the efficiency of drilling and tapping the workpiece, but also improves the processing accuracy of the workpiece. In the utility model, the workpiece is clamped by the main spindle of the machine tool, and the power head is installed on the secondary spindle of the machine tool. When processing, the workpiece needs to pass through the movable guide sleeve on the column between the main spindle of the machine tool and the secondary spindle of the machine tool. The workpiece is supported by the movable guide sleeve, which reduces the swing of the workpiece during processing and improves the processing accuracy of the end of the workpiece.

[0005] As a further improvement of the utility model, a gear box is provided on the side of the power head mounting seat away from the main spindle of the machine tool, and the gear box is open on the side facing the secondary spindle of the machine tool. A driving gear that rotates synchronously with the secondary spindle of the machine tool is installed on the spindle of the secondary spindle of the machine tool, and a transition gear is installed in the gear box for rotation, and the transition gear is meshed with the driving gear. When the gear is inserted into the power head mounting hole, the power head gear on the power head is meshed with the transition gear. The utility model provides a gear box, and the transition gear in the gear box is meshed with the driving gear on the spindle of the secondary spindle of the machine tool. The spindle of the secondary spindle of the machine tool rotates to drive the transition gear to rotate through the driving gear, and then the transition gear drives the power head to rotate.

[0006] As a further improvement of the utility model, two left and right power head mounting holes are provided on the power head mounting seat, the two power head mounting holes are located below the same transition gear, and are symmetrically arranged on the left and right sides of the same transition gear, and the power heads in the two power head mounting holes are meshed with the same transition gear. The utility model is provided with two power head mounting holes, and two power heads can be installed at the same time, so there is no need to frequently replace the power head during use, which reduces the time for replacing the power head and improves the efficiency of workpiece drilling.

[0007] As a further improvement of the utility model, a gearbox cover is detachably mounted on a side of the gearbox away from the main spindle of the machine tool, and one end of the transition gear in the gearbox is rotatably connected to the gearbox cover. The present invention facilitates the installation of the gears in the gearbox by providing the gearbox cover.

[0008] As a further improvement of the utility model, the transition gear includes a transition gear A and a transition gear B. A gear installation groove is provided on one side of the machine tool sub-spindle where the gear box is installed. The transition gear A is rotatably installed in the gear installation groove. The transition gear A meshes with the driving gear. There are more than one transition gear B. The transition gears B are rotatably installed in the gear box and mesh with each other in sequence. A transition gear B close to the transition gear A meshes with the transition gear A. In the utility model, the transition gear A in the gear installation groove on the machine tool sub-spindle meshes with the transition gear B in the gear box. The power of the spindle of the machine tool sub-spindle is transmitted to the transition gear B through the transition gear A, thereby driving the power head to rotate. The volume of the transition gear B is reduced through the transition of the transition gear A.

[0009] As a further improvement of the present invention, the gear box is detachably mounted on the machine tool sub-spindle. The detachable mounting of the gear box and the machine tool sub-spindle in the present invention facilitates the installation and manufacture of the present invention as a whole.

[0010] In summary, the beneficial effects of the utility model are as follows: the utility model increases the feed distance of the workpiece by installing a power head on the sub-spindle of the machine tool, can drill a hole with a depth greater than 100 mm at the end of the workpiece, and can realize the function of tapping in the hole at the end of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0012] Figure 2 It is a three-dimensional structural schematic diagram reflecting the installation of the power head in the utility model.

[0013] Figure 3 It is a three-dimensional exploded schematic diagram of the utility model.

[0014] Figure 4 It is a schematic diagram of the use state of the utility model.

[0015] Among them: 1. Machine tool sub-spindle; 2. Power head mounting seat; 3. Power head; 4. Power head mounting hole; 5. Machine tool main spindle; 6. Workpiece; 7. Gear box; 8. Gear box cover; 9. Transition gear A; 10. Transition gear B; 11. Gear mounting groove; 12. Column; 13. Movable guide sleeve. DETAILED DESCRIPTION

[0016] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings. In the present invention, the length direction of the workpiece 6 in use is the front-to-back direction, and the direction perpendicular to the length direction of the workpiece 6 on the horizontal plane is the left-to-right direction.

[0017] like Figures 1 to 4 The sub-spindle processing structure of the ultra-precision machine tool shown in the figure includes a sub-spindle 1 of the machine tool, a power head mounting seat 2 and a power head 3. The sub-spindle 1 of the machine tool is mounted on the machine tool bed and can move horizontally on the machine tool bed. The sliding installation method of the sub-spindle 1 of the machine tool and the machine tool bed is a prior art and is not described in detail in the utility model. The power head mounting seat 2 in the utility model is fixed on the left or right side of the sub-spindle 1 of the machine tool. A power head mounting hole 4 for mounting the power head 3 is provided on the power head mounting seat 2. The power head mounting hole 4 is located on the side of the power head mounting seat 2 close to the main spindle 5 of the machine tool. The center line of the power head mounting hole 4 is optimally set to be aligned with the sub-spindle of the machine tool. The center lines of the spindles of the axis 1 are parallel, the power head 3 is inserted into the power head mounting hole 4, and is driven by the machine tool sub-spindle 1 to rotate on the power head mounting seat 2. Since the power head mounting hole 4 is parallel to the center line of the spindle of the machine tool sub-spindle 1, and the spindle of the machine tool sub-spindle 1 is parallel to the spindle of the machine tool main spindle 5, when the power head 3 is inserted into the power head mounting hole 4, the power head 3 is parallel to the spindle of the machine tool main spindle 5. When in use, the power head 3 is in line with the workpiece 6 clamped by the machine tool main spindle 5 installed on the machine tool bed, and the power head 3 is against the end of the workpiece 6, and is used to drill a hole at the end of the workpiece 6 clamped by the machine tool main spindle 5 or to tap the hole at the end of the workpiece.

[0018] like Figures 1 to 3As shown, in order to realize that the machine tool sub-spindle 1 drives the power head 3 to rotate, the utility model is provided with a gear box 7 on the side of the power head mounting seat 2 away from the machine tool main spindle 5, and the gear box 7 is open toward the side of the machine tool sub-spindle 1. The gear box 7 in the utility model is integrally formed with the power head mounting seat 2. The utility model is provided with a driving gear (not shown in the figure) that rotates synchronously with the machine tool sub-spindle 1 on the core shaft of the machine tool sub-spindle 1. The core shaft of the machine tool sub-spindle 1 rotates to drive the driving gear to rotate. A transition gear is rotatably installed in the gear box 7, and the transition gear is meshed with the driving gear. The rotation of the driving gear drives the transition gear to rotate. When the power head is inserted into the power head mounting hole 4, the power head gear on the power head 3 is meshed with the transition gear. When the transition gear rotates, the power head 3 is driven to rotate, thereby providing power for the power head 3 to drill a hole at the end of the workpiece 6. The utility model is optimally provided with two left and right power head mounting holes 4 on the power head mounting seat 2, the two power head mounting holes 4 are located below the same transition gear, and are symmetrically arranged on the left and right sides of the same transition gear, the power heads 3 in the two power head mounting holes 4 are meshed with the same transition gear, so the two power heads 3 in the utility model are driven by the same transition gear, it should be noted that the utility model can only install one power head 3 in the use state, or can install two power heads 3 at the same time, after the power head 3 is inserted into the power head mounting hole 4, the power head 3 is locked on the power head mounting seat 2 by bolts. The gear box 7 in the utility model is optimally detachably mounted on the machine tool sub-spindle 1 by bolts.

[0019] like Figure 3 As shown, in order to facilitate the installation of the transition gear, the utility model sets an opening on the side of the gear box 7 away from the main spindle 5 of the machine tool, and a gear box cover 8 is detachably installed on one end of the gear box 7 with the opening by bolts, and the gear box cover 8 is used to close the above-mentioned opening, and one end of the transition gear in the gear box 7 is rotatably connected to the gear box cover 8 by a bearing. The transition gears in the utility model include a transition gear A9 and more than one transition gear B10. A gear mounting groove 11 is provided on one side of the machine tool sub-spindle 1 on which the gear box 7 is mounted. The transition gear A9 is rotatably mounted in the gear mounting groove 11. The transition gear A9 is meshed with the driving gear on the core shaft of the machine tool sub-spindle 1. The number of transition gears B10 in the utility model is set to three. The three transition gears B10 are rotatably mounted in the gear box 7 and meshed in sequence. A transition gear B10 close to the transition gear A9 meshes with the transition gear A9. When the power head 3 is inserted into the power head mounting hole 4, the power head gear on the power head 3 meshes with a transition gear B10 farthest from the driving gear.

[0020] like Figure 4As shown, when the utility model is in use, the main spindle 5 of the machine tool clamps the rod-shaped workpiece 6 and feeds it in the direction of the auxiliary spindle 1 of the machine tool (i.e., the front-back direction), wherein the workpiece 6 passes through the movable guide sleeve 13 on the column 12 located between the main spindle 6 of the machine tool and the auxiliary spindle 1 of the machine tool, and the power head 3 on the auxiliary spindle 1 of the machine tool faces the end of the workpiece 6. After the main spindle 5 of the machine tool drives the workpiece to feed and contact with the power head, the power head starts to punch or tap the end of the workpiece 6. As the workpiece 6 is fed, the power head 3 completes the punching or tapping of the end of the workpiece 6, and then The workpiece 6 is driven backward by the main spindle 5 of the machine tool, and is pulled out from the movable guide sleeve 13 on the column 12 after being disengaged from the power head 4, and the workpiece 6 after drilling or tapping is removed from the main spindle 5 of the machine tool, or after the workpiece 6 is disengaged from the power head 3, the workpiece 6 is subjected to other processing by the tool on the column 12. The two power heads 3 in the utility model can be used for drilling a hole at the end of the workpiece 6 by one of them, and for tapping in the hole drilled at the end of the workpiece 6 by the other, and the switching is carried out by the left and right movement of the sub-spindle 1 of the machine tool.

[0021] The parts not specifically described in the above description are all prior art, or can be implemented by prior art. Moreover, the specific implementation cases described in the present invention are only preferred implementation cases of the present invention, and are not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent scope of the present invention should be regarded as the technical scope of the present invention.

Claims

1. A secondary axis processing structure of an ultra-precision machine tool, characterized in that: include A machine tool sub-spindle (1), the machine tool sub-spindle (1) being mounted on a machine tool bed; A power head mounting seat (2), the power head mounting seat (2) is fixed on the machine tool sub-spindle (1), and a power head mounting hole (4) for mounting the power head (3) is provided on the power head mounting seat (2); The power head (3) is inserted into the power head mounting hole (4) and driven by the machine tool secondary spindle (1) to rotate on the power head mounting seat (2). The power head (3) is used to process the end of a workpiece (6) clamped by the machine tool main spindle (5) when in use.

2. The secondary axis processing structure of the ultra-precision machine tool according to claim 1, characterized in that: A gear box (7) is arranged on the side of the power head mounting seat (2) away from the main spindle (5) of the machine tool, and the gear box (7) is open on the side facing the secondary spindle (1) of the machine tool. A driving gear that rotates synchronously with the secondary spindle (1) is installed on the core shaft of the secondary spindle of the machine tool. A transition gear is rotatably installed in the gear box (7), and the transition gear meshes with the driving gear. When the power head is inserted into the power head mounting hole (4), the power head gear on the power head (3) meshes with the transition gear.

3. The secondary axis processing structure of the ultra-precision machine tool according to claim 2, characterized in that: The power head mounting seat (2) is provided with two left and right power head mounting holes (4), the two power head mounting holes (4) are located below the same transition gear and are symmetrically arranged on the left and right sides of the same transition gear, and the power heads (3) in the two power head mounting holes (4) are meshed with the same transition gear.

4. The secondary axis processing structure of the ultra-precision machine tool according to claim 2, characterized in that: A gear box cover plate (8) is detachably mounted on a side of the gear box (7) which is away from the main spindle (5) of the machine tool and one end of the transition gear in the gear box (7) is rotatably connected to the gear box cover plate (8).

5. The secondary axis processing structure of the ultra-precision machine tool according to claim 2, characterized in that: The transition gear comprises a transition gear A (9) and a transition gear B (10). A gear mounting groove (11) is provided on one side of the machine tool sub-spindle (1) where the gear box (7) is mounted. The transition gear A (9) is rotatably mounted in the gear mounting groove (11). The transition gear A (9) is meshed with a driving gear. There are more than one transition gear B (10). The transition gears B (10) are rotatably mounted in the gear box (7) and meshed with each other in sequence. A transition gear B (10) close to the transition gear A (9) is meshed with the transition gear A (9).

6. The secondary axis processing structure of the ultra-precision machine tool according to claim 2, characterized in that: The gear box (7) is detachably mounted on the machine tool sub-spindle (1).

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