Rigidity improving device for high-precision and high-rigidity main shaft of high-precision vertical lathe

Abstract

The rigidity improving device comprises a wedge block and a screw, the wedge block is a block-shaped body, the two sides of the wedge block in the width direction are both provided with radians, and the radians of the two sides of the wedge block are consistent; the section of the wedge block is an inverted right trapezoid; one side of the wedge block in the width direction is a vertical surface, the vertical surface of the wedge block is a working surface, and the working surface faces the excircle surface of the main shaft; the other side of the wedge block in the width direction is an inclined surface, the inclined surface of the wedge block is a second working surface, and the second working surface is matched with the inclined surface of the workbench base; the two sides of the top of the wedge block in the length direction are each provided with a combining hole in the vertical direction, and the interiors of the combining holes are each in threaded connection with a screw. A dismounting hole in the vertical direction is formed in the middle position of the top of the wedge block between the two fastening holes; the six wedge blocks are evenly arranged in the circumferential direction of the main shaft at intervals. The rigidity of the main shaft can be effectively guaranteed and improved, and meanwhile the working precision and stability of a machine tool are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of high-precision high-rigidity spindle rigidity promotion device for high-precision vertical lathe, belong to mechanical technical field. BACKGROUND

[0002] Spindle is the device of supporting and rotating workpiece in high-precision vertical lathe, can control spindle speed by frequency converter and other devices, to meet the processing needs of different materials and technology, it has high rotation accuracy, high rigidity, reduce friction, long service life, wide speed range and other advantages, and overall improve the performance and reliability of mechanical system, it is important device to ensure workpiece processing efficiency, machining accuracy, product quality and other aspects.And in the process of assembling spindle, its rigidity must be guaranteed to reach the required standard, it is an important method to ensure the performance of machine tool.Install guide rod on workbench base, hoist spindle, coat the end face of main shaft hole with red powder on base, inspect that spindle contact is uniform, contact area reaches more than 70%, remove guide rod, use stud bolt and nut, symmetrically lock nut, press spindle into the mounting hole of workbench base, install spindle screw and fasten, inspect that 0.02 plug gauge does not enter the joint surface of spindle and workbench base.

[0003] Spindle rotates at high speed when working, bears bending, torsion and other loads, and the shaft hole cooperation of spindle and workbench base during installation cannot effectively guarantee the rigidity of spindle, which will affect the accuracy and stability of machine tool. CONTENT OF UTILITY MODEL

[0004] In order to overcome the deficiencies of prior art, the utility model provides a kind of high-precision high-rigidity spindle rigidity promotion device for high-precision vertical lathe, which can more effectively guarantee and improve the rigidity of spindle, while ensuring the accuracy and stability of machine tool work.

[0005] The utility model solves the technical scheme that the technical problem adopts: a kind of high-precision high-rigidity spindle rigidity promotion device for high-precision vertical lathe, including wedge and screw, the wedge is the block of the two sides of width direction with radian, the two sides radian of wedge are consistent;The section of wedge is inverted right angle trapezoid, one side of the width direction of wedge is vertical surface, and the other side of the width direction of wedge is inclined surface;The two sides of length direction of wedge top are equipped with a vertical hole, and the hole is connected with a screw in screw thread;Between two holes, the middle position of wedge top is equipped with a vertical dismounting hole.

[0006] Further, the top surface area of wedge is greater than the bottom surface area.

[0007] Further, the vertical surface of wedge is working surface, and the working surface faces the outer cylindrical surface of spindle.

[0008] Further, the inclined surface of the wedge is a second working surface, and the second working surface cooperates with the inclined surface of the base of the worktable.

[0009] Further, the six wedges are uniformly arranged in the circumferential direction of the main shaft.

[0010] Further, the screw is a hexagonal socket head cap screw.

[0011] The utility model discloses the problem of the prior art is solved, the rigidity of the main shaft can be guaranteed and improved more effectively, the precision and stability of the machine tool are guaranteed, the device has simple structure, convenient to use, high assembly efficiency and high economic value. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model is further described below in combination with the drawings and specific embodiments.

[0013] Figure 1 It is the structure schematic diagram when installing the utility model.

[0014] Figure 2 It is the enlarged schematic diagram of A of Figure 1

[0015] Figure 3 It is the plan view of Figure 1

[0016] Figure 4 It is the section view of the wedge of the utility model.

[0017] Figure 5 It is the plan view of the wedge of the utility model.

[0018] Figure 6 It is the schematic diagram of the main shaft.

[0019] Figure 7 It is the schematic diagram of the base of the worktable.

[0020] Mark in the drawing:

[0021] 1, the main shaft, 2, the base of the worktable, 3, the wedge, 4, the screw, 5, the clearance, 6, the first working surface, 7, the second working surface, 8, the hole, 9, the dismounting hole, 10, the outer circle surface, 11, the inclined surface, 12, the threaded hole. DETAILED DESCRIPTION

[0022] As Figure 1 ​​A high-precision high-rigidity spindle rigidity improving device for a high-precision vertical lathe is shown in FIG. 7, which comprises a wedge block 3 and a screw 4. The wedge block 3 is a block-shaped body with a curvature on both sides in the width direction, and the curvatures on both sides of the wedge block 3 are consistent. The cross section of the wedge block 3 is an inverted right-angled trapezoid, and the area of the top surface of the wedge block 3 is larger than that of the bottom surface. One side of the wedge block 3 in the width direction is a vertical surface, and the vertical surface of the wedge block 3 is a working surface 6, which faces the outer cylindrical surface 10 of the spindle 1. The other side of the wedge block 3 in the width direction is an inclined surface, and the inclined surface of the wedge block 3 is a second working surface 7, which cooperates with the inclined surface of the workbench base 2. Both sides of the wedge block 3 in the length direction of the top are provided with a vertical clamping hole 8, and a screw 4 is threadedly connected in the clamping hole 8. The screw 4 is an internal hexagonal cylindrical head screw. Between the two clamping holes 8, a vertical dismounting hole 9 is arranged at the middle position of the top of the wedge block 3. There are six wedge blocks 3, which are uniformly arranged in the circumferential direction of the spindle 1.

[0023] When in use, after the spindle 1 is clamped into the workbench base 2, four dial gauges and magnetic gauge seats are adsorbed on the workbench base 2 and adjusted up and down to make the measuring heads uniformly distributed to touch the upper end of the spindle 1. The six wedge blocks 3 are uniformly distributed and installed in the circumferential direction of the spindle 1, and there is a gap 5 below the wedge block 3 which can move downward after being clamped with the workbench base 2. The first working surface 6 of the wedge block 3 abuts against the outer cylindrical surface 10 of the spindle 1, the screw 4 is fastened by a torque wrench, the wedge block 3 is locked by the clamping hole 8 and the corresponding threaded hole 12 of the workbench base 2, the second working surface 7 of the wedge block 3 moves into the gap 5 below along the direction of the inclined surface 11 of the workbench base 2, the outer cylindrical surface 10 of the spindle 1 is pre-tightened, the radial over-positioning of the spindle 1 is realized, and the rigidity of the spindle 1 is improved.

[0024] The following matters need attention during the installation of the wedge block 3:

[0025] 1) The gap between the second working surface 7 of the wedge block 3 and the inclined surface 11 of the workbench base 2 should be ensured to be not entered by a 0.04 mm feeler gauge.

[0026] 2) Taking the size of the screw 4 as an example, the torque value of the torque wrench is set to 83 (N·m) according to the relevant standards of the screw.

[0027] 3) The dial gauge reading should not change.

[0028] 4) The screw 4 is coated with a thread locking agent.

[0029] During use, the first working surface 6 and the second working surface 7 of the wedge block 3, the inclined surface 11 of the workbench base 2 and the screw 4 constitute a pre-tightening structure, which can over-position the spindle 1 in the radial direction, improve the rigidity of the spindle 1 and ensure the accuracy and stability of the machine tool. The gap 5 below the wedge block 3 and the workbench base 2 constitute a non-contact structure, which can ensure the effective use of the device.

Claims

1. A high-precision high-rigidity spindle rigidity boosting device for a high-precision vertical lathe, characterized by: The wedge (3) is a block with two arcs on the width direction, and the two arcs are consistent; the cross section of the wedge (3) is an inverted right-angle trapezoid, one side of the wedge (3) on the width direction is a vertical surface, and the other side of the wedge (3) on the width direction is an inclined surface; the top of the wedge (3) is provided with two vertical engaging holes (8) on the length direction, and a screw (4) is threadedly connected in each engaging hole (8); a vertical dismounting hole (9) is arranged at the middle position of the top of the wedge (3) between the two engaging holes (8).

2. The high-precision high-rigidity spindle rigidity enhancing device for a high-precision vertical lathe according to claim 1, characterized in that: The top surface area of the wedge (3) is larger than the bottom surface area.

3. The high-precision high-rigidity spindle rigidity enhancing device for a high-precision vertical lathe according to claim 1, characterized in that: The vertical surface of the wedge (3) is a working surface (6), and the working surface (6) faces the outer surface (10) of the main shaft (1).

4. The high-precision high-rigidity spindle rigidity enhancing device for a high-precision vertical lathe according to claim 1, characterized in that: The inclined surface of the wedge (3) is a second working surface (7), and the second working surface (7) cooperates with the inclined surface of the workbench base (2).

5. The high-precision high-rigidity spindle rigidity enhancing device for a high-precision vertical lathe according to claim 1, characterized in that: The six wedges (3) are evenly arranged on the circumferential direction of the main shaft (1).

6. The high-precision high-rigidity spindle rigidity enhancing device for a high-precision vertical lathe according to claim 1, characterized in that: The screw (4) is an inner hexagonal cylindrical head screw.

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