阅读说明：本技术 机床主轴锥孔修复装置及修复方法 (Repairing device and repairing method for taper hole of machine tool spindle ) 是由 闫庆禹 陈科 陈平 刘军 吕高强 刘永超 何正君 王冀军 于 2020-07-21 设计创作，主要内容包括：本发明涉及一种机床主轴锥孔修复装置,同时涉及一种机床主轴锥孔修复方法,属于机床的修复技术领域。在修复过程中,首先启动机床,使机床主轴旋转；其次启动磨削装置的驱动电机,使砂轮棒绕自身轴旋转,然后利用工作台的驱动机构,带动砂轮棒沿其轴线方向移动进给,通过上述三个复合运动完成机床主轴锥孔的修复。采用上述修复方式,其修复精度主要依靠基座在制造和加工过程中的底面水平精度和上部斜面锥度精度来保证,因此避免了将磨损严重的主轴锥孔作为基准的现象,能够有效保证主轴锥度修复精度效果达到预期要求,并且安装实施方便。(The invention relates to a device and a method for repairing a spindle taper hole of a machine tool, belonging to the technical field of repair of machine tools. In the repairing process, firstly, a machine tool is started to rotate a main shaft of the machine tool; and secondly, starting a driving motor of the grinding device to enable the grinding wheel rod to rotate around the self axis, then driving the grinding wheel rod to move and feed along the axis direction by using a driving mechanism of the workbench, and completing the repair of the machine tool spindle taper hole through the three composite motions. By adopting the repairing mode, the repairing precision is mainly ensured by the horizontal precision of the bottom surface and the taper precision of the inclined surface at the upper part of the base in the manufacturing and processing processes, so that the phenomenon that the spindle taper hole seriously abraded is taken as a reference is avoided, the effect of the spindle taper repairing precision can be effectively ensured to meet the expected requirement, and the installation and implementation are convenient.)

1. Lathe main shaft taper hole prosthetic devices, its characterized in that: the grinding machine comprises a base (1), the bottom surface of the base (1) is a horizontal positioning surface, the upper part of the base (1) is provided with an inclined surface matched with the taper of a machine tool spindle taper hole (20), a sliding guide rail (7) is fixedly installed on the inclined surface, the axis of the sliding guide rail (7) is arranged along the inclined direction of the inclined surface, a workbench (5) which is installed in a sliding mode is arranged on the sliding guide rail (7), the workbench (5) is provided with a driving mechanism which drives the workbench (5) to do reciprocating motion along the axis direction of the sliding guide rail (7), a grinding device is fixedly installed on the workbench (5) and comprises a driving motor (3), a grinding spindle (6) and a grinding wheel rod (8), the shell of the grinding spindle (6) and the driving motor (3) are fixedly installed on the workbench (5), the input end of the rotating spindle of the grinding spindle (6) is connected with the output shaft of the driving motor, the axis of the rotating main shaft of the grinding main shaft (6) and the axis of the grinding wheel rod (8) are arranged coaxially and are parallel to the axis of the sliding guide rail (7), and the lower end of the grinding wheel rod (8) is fixedly connected to the output end of the rotating main shaft of the grinding main shaft (6).

2. The apparatus for repairing a tapered hole of a spindle of a machine tool according to claim 1, wherein: the driving mechanism of the workbench (5) comprises a lead screw kinematic pair, the lead screw kinematic pair comprises a lead screw nut (17) and a lead screw (18) which are in threaded connection, the lead screw nut (17) is fixedly connected with the workbench (5), the axis of the lead screw (18) is parallel to the axis of the sliding guide rail (7), the upper end of the lead screw (18) is rotatably connected with a locking device (19), the locking device (19) is fixedly installed on the base (1), the lower end of the lead screw (18) is in driving connection with a hand wheel (9) through a transmission mechanism, and the hand wheel (9) is rotatably installed on the base (1).

3. The apparatus for repairing a tapered hole of a spindle of a machine tool according to claim 2, wherein: the transmission mechanism between the hand wheel (9) and the lower end of the lead screw (18) comprises a transmission shaft (11), a speed reducer (13) and a coupler (15), the transmission shaft (11) is installed on the base (1) through a transmission shaft installation seat (10), the transmission shaft (11) is rotatably connected with the transmission shaft installation seat (10), and the transmission shaft installation seat (10) is fixedly connected with the base (1); the speed reducer (13) is fixedly arranged on the base (1); one end of the transmission shaft (11) is in driving connection with the input end of the speed reducer (13), and the other end of the transmission shaft is fixedly connected with the hand wheel (9); the output end of the speed reducer (13) is connected with a screw rod (18) through a coupling (15).

4. The apparatus for repairing a tapered hole of a spindle of a machine tool according to claim 1, wherein: the sliding guide rail (7) comprises two guide rails which are arranged in parallel, each guide rail is provided with two guide rail sliding blocks (16), and the guide rail sliding blocks (16) are fixedly connected with the workbench (5).

5. The apparatus for repairing a tapered hole of a spindle of a machine tool according to claim 1, wherein: the transmission mechanism between the input end of the grinding spindle (6) and the output shaft of the driving motor (3) is a V-belt transmission mechanism.

6. The apparatus for repairing a tapered hole of a spindle of a machine tool according to claim 1, wherein: the shell of the grinding spindle (6) is fixedly arranged on the workbench (5) through a spindle fixing seat (4).

7. The apparatus for repairing a tapered hole of a spindle of a machine tool according to claim 1, wherein: the grinding wheel rod (8) is connected with the rotating main shaft of the grinding main shaft (6) through threads.

8. The method for repairing the taper hole of the machine tool spindle is characterized by comprising the following steps: the machine tool spindle taper hole repairing device is characterized in that the machine tool spindle taper hole repairing device according to any one of claims 1 to 7 is adopted, during repairing, the machine tool spindle taper hole repairing device is fixedly installed on a workbench of a machine tool through the base (1), after installation is completed, the axis of the grinding wheel rod (8) is matched with the taper of the machine tool spindle taper hole (20), and when the grinding wheel rod (8) moves and feeds along the axis direction, the grinding wheel rod (8) can grind the corresponding position of the machine tool spindle taper hole (20) to a set taper; in the repairing process, firstly, a machine tool is started to rotate a main shaft of the machine tool; and secondly, starting a driving motor (3) of the grinding device to enable the grinding wheel rod (8) to rotate around the self axis, then driving the grinding wheel rod (8) to move and feed along the axis direction by using a driving mechanism of the workbench (5), and completing the repair of the machine tool spindle taper hole (20) through the three composite motions.

9. The method for repairing a tapered hole of a spindle of a machine tool according to claim 8, wherein: the workbench of the machine tool is provided with a clamping groove for mounting the base (1), and the base (1) is fixedly connected to the workbench of the machine tool through bolts, screws, pins or the combination of the connecting pieces.

Technical Field

The invention relates to a device and a method for repairing a spindle taper hole of a machine tool, belonging to the technical field of repair of machine tools.

Background

In the processing process of an automobile panel mould, the abrasion of a taper hole of a main shaft of a machine tool is easily caused due to cutting impact vibration caused by unreasonable cutting force or workpiece material defects, when the machine tool is subjected to fine processing, the processing precision of the mould is greatly influenced due to the out-of-tolerance of radial and axial runout of the main shaft caused by the abrasion of the taper hole of the main shaft, so the taper of the main shaft is repaired into an important item for the precision maintenance of a daily machine tool, and aiming at the current situation, in the current mainstream mechanical processing enterprises, one method is to disassemble the main shaft and a taper shank, carry out grinding processing on special equipment, and reinstall the main shaft into the machine tool after eliminating the abnormal abrasion of the taper hole; the method not only consumes time and energy, but also the frequent disassembly and assembly of the main shaft easily damages the original assembly precision of the main shaft on the machine tool. The other method is to adopt a common spindle grinder on the market to grind, the grinding wheel rod is generally fixed on the base in the installation process, when repairing, the spindle of the machine tool is started, the axis of the spindle of the machine tool moves to be coaxial with the spindle of the grinding wheel rod through a numerical control program, and the repairing is carried out by means of the rotation and the up-and-down movement of the spindle. Although the method is simple to operate and high in efficiency, the repair precision needs to meet the following conditions: firstly, the machine tool needs to have better running precision, the coaxiality of the main shaft of the machine tool and the main shaft of the grinding wheel rod can be ensured within a tolerance range in a program, and secondly, the rotation precision of radial and axial runout of the main shaft needs to meet the tolerance requirement in the grinding process of the main shaft. From the actual repair effect, the structural device often cannot achieve the expected main shaft taper repair precision effect, because the machine tool main shaft taper hole is seriously abraded, and the expected precision requirement cannot be obviously achieved by using the poor main shaft taper hole as a reference for grinding.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the device for repairing the taper hole of the spindle of the machine tool is suitable for repairing the taper hole of the spindle of the machine tool, is convenient to implement, and can ensure that the effect of the taper repairing precision of the spindle meets the expected requirement.

In order to solve the technical problems, the invention adopts the technical scheme that: the device for repairing the taper hole of the machine tool spindle comprises a base, wherein the bottom surface of the base is a horizontal positioning surface, the upper part of the base is provided with an inclined surface matched with the taper of the taper hole of the machine tool spindle, a sliding guide rail is fixedly arranged on the inclined surface, the axis of the sliding guide rail is arranged along the inclined direction of the inclined surface, a workbench which is slidably arranged is arranged on the sliding guide rail, the workbench is provided with a driving mechanism which drives the workbench to reciprocate along the axis direction of the sliding guide rail, a grinding device is fixedly arranged on the workbench and comprises a driving motor, a grinding spindle and a grinding wheel rod, the shell of the grinding spindle and the driving motor are fixedly arranged on the workbench, the input end of the rotating spindle of the grinding spindle is connected with the output shaft of the driving motor through a transmission mechanism, the axis of the rotating spindle of the grinding spindle and the axis of the grinding wheel, the lower end of the grinding wheel rod is fixedly connected with the output end of the rotating main shaft of the grinding main shaft.

Further, the method comprises the following steps: the driving mechanism of the workbench comprises a screw rod kinematic pair, the screw rod kinematic pair comprises a screw nut and a screw rod which are in threaded connection, the screw nut is fixedly connected with the workbench, the axis of the screw rod is parallel to the axis of the sliding guide rail, the upper end of the screw rod is rotatably connected with a locking device, the locking device is fixedly installed on the base, the lower end of the screw rod is connected with a hand wheel through a transmission mechanism in a driving mode, and the hand wheel is rotatably installed on the base.

Further, the method comprises the following steps: the transmission mechanism between the hand wheel and the lower end of the lead screw comprises a transmission shaft, a speed reducer and a coupler, the transmission shaft is arranged on the base through a transmission shaft mounting seat, the transmission shaft is rotatably connected with the transmission shaft mounting seat, and the transmission shaft mounting seat is fixedly connected with the base; the speed reducer is fixedly arranged on the base; one end of the transmission shaft is in driving connection with the input end of the speed reducer, and the other end of the transmission shaft is fixedly connected with the hand wheel; the output end of the speed reducer is connected with the lead screw through the coupler.

Further, the method comprises the following steps: the sliding guide rail comprises two guide rails which are arranged in parallel, each guide rail is provided with two guide rail sliding blocks, and the guide rail sliding blocks are fixedly connected with the workbench.

Further, the method comprises the following steps: the transmission mechanism between the input end of the grinding main shaft and the output shaft of the driving motor is a V-belt transmission mechanism.

Further, the method comprises the following steps: the shell of the grinding spindle is fixedly arranged on the workbench through a spindle fixing seat.

Further, the method comprises the following steps: the grinding wheel rod is connected with the rotating main shaft of the grinding main shaft through threads.

Correspondingly, on the basis of the machine tool spindle taper hole repairing device, the invention also provides a machine tool spindle taper hole repairing method, during repairing, the machine tool spindle taper hole repairing device is fixedly installed on a workbench of a machine tool through a base, after the installation is completed, the axis of the grinding wheel rod is matched with the taper of the machine tool spindle taper hole, and when the grinding wheel rod moves along the axis direction to feed, the grinding wheel rod can grind the corresponding position of the machine tool spindle taper hole to a set taper; in the repairing process, firstly, a machine tool is started to rotate a main shaft of the machine tool; and secondly, starting a driving motor of the grinding device to enable the grinding wheel rod to rotate around the self axis, then driving the grinding wheel rod to move and feed along the axis direction by using a driving mechanism of the workbench, and completing the repair of the machine tool spindle taper hole through the three composite motions.

Further, the method comprises the following steps: the workbench of the machine tool is provided with a clamping groove for mounting a base, and the base is fixedly connected to the workbench of the machine tool through bolts, screws, pins or the combination of the connecting pieces.

The invention has the beneficial effects that: by adopting the repairing mode, the repairing precision is mainly ensured by the horizontal precision of the bottom surface and the taper precision of the inclined surface at the upper part of the base in the manufacturing and processing processes, so that the phenomenon that the spindle taper hole seriously abraded is taken as a reference is avoided, the effect of the spindle taper repairing precision can be effectively ensured to meet the expected requirement, and the installation and implementation are convenient.

Drawings

FIG. 1 is an axial view of a device for repairing a taper hole of a machine tool spindle according to the present invention;

FIG. 2 is a schematic structural diagram of a machine tool spindle taper hole repairing device in the back position of a workbench;

FIG. 3 is a left side view of the apparatus for repairing a tapered hole of a spindle of a machine tool according to the present invention;

the labels in the figure are: 1-base, 2-V belt, 3-driving motor, 4-main shaft fixing seat, 5-workbench, 6-grinding main shaft, 7-sliding guide rail, 8-grinding wheel rod, 9-hand wheel, 10-transmission shaft mounting seat, 11-transmission shaft, 12-first speed reducer mounting seat, 13-speed reducer, 14-second speed reducer mounting seat, 15-coupler, 16-guide rail sliding block, 17-lead screw nut, 18-lead screw, 19-locking device and 20-machine tool main shaft taper hole.

Detailed Description

The invention is further explained below with reference to the drawings and examples.

As shown in fig. 1, 2 and 3, the device for repairing a tapered hole of a machine tool spindle according to the present invention includes a base 1, a bottom surface of the base 1 is a horizontal positioning surface, an upper portion of the base 1 has an inclined surface adapted to a taper of a tapered hole 20 of the machine tool spindle, a sliding guide 7 is fixedly mounted on the inclined surface, an axis of the sliding guide 7 is arranged along an inclined direction of the inclined surface, a table 5 is slidably mounted on the sliding guide 7, the table 5 is provided with a driving mechanism for driving the table 5 to reciprocate along an axis direction of the sliding guide 7, a grinding device is fixedly mounted on the table 5, the grinding device includes a driving motor 3, a grinding spindle 6 and a grinding wheel bar 8, a housing of the grinding spindle 6 and the driving motor 3 are fixedly mounted on the table 5, an input end of a rotating spindle of the grinding spindle 6 is connected to an output shaft of the driving motor 3 through a transmission mechanism, an axis of, The axis of the grinding wheel rod 8 is arranged coaxially and is parallel to the axis of the sliding guide rail 7, and the lower end of the grinding wheel rod 8 is fixedly connected to the output end of the rotating main shaft of the grinding main shaft 6.

The driving mechanism of the worktable 5 only needs to meet the basic requirement that the worktable reciprocates along the axial direction of the sliding guide rail 7, and in order to ensure simple and reliable structure, the preferred mode adopted in the invention is as follows: the driving mechanism of the workbench 5 comprises a screw rod kinematic pair, the screw rod kinematic pair comprises a screw rod nut 17 and a screw rod 18 which are in threaded connection, the screw rod nut 17 is fixedly connected with the workbench 5, the axis of the screw rod 18 is parallel to the axis of the sliding guide rail 7, the upper end of the screw rod 18 is rotatably connected with a locking device 19, the locking device 19 is fixedly installed on the base 1, the lower end of the screw rod 18 is in driving connection with a hand wheel 9 through a transmission mechanism, and the hand wheel 9 is rotatably installed on the base 1. During implementation, the hand wheel 9 is rotated to drive the screw rod 18 to rotate, the screw rod motion pair converts the rotation motion of the screw rod 18 into the linear motion of the screw rod nut 17, and then the workbench 5 is driven to move along the axis direction of the sliding guide rail 7, so that the movement and feeding of the grinding wheel rod along the axis direction are realized.

In addition, in order to make the structure simple and reliable, the transmission mechanism between the hand wheel 9 and the lower end of the lead screw 18 comprises a transmission shaft 11, a speed reducer 13 and a coupler 15, the transmission shaft 11 is installed on the base 1 through a transmission shaft installation seat 10, the transmission shaft 11 is rotatably connected with the transmission shaft installation seat 10, and the transmission shaft installation seat 10 is fixedly connected with the base 1; the speed reducer 13 is fixedly arranged on the base 1; one end of the transmission shaft 11 is in driving connection with the input end of the speed reducer 13, and the other end of the transmission shaft is fixedly connected with the hand wheel 9; the output end of the speed reducer 13 is connected with a screw 18 through a coupling 15. For convenient assembly, transmission shaft mount 10 chooses bolt fixed connection for use with base 1, and speed reducer 13 passes through speed reducer mount fixed mounting on base 1, and in this embodiment, the speed reducer mount includes first speed reducer mount 12 and second speed reducer mount 14, all through bolt and base 1 fixed connection. In implementation, the hand wheel 9 drives the transmission shaft 11 to rotate synchronously, and the lead screw 18 is driven to rotate through the speed reducer 13 and the coupler 15.

In order to make the structure simple and reliable, the sliding guide rail 7 of the invention comprises two guide rails which are arranged in parallel, each guide rail is provided with two guide rail sliding blocks 16, and the guide rail sliding blocks 16 are fixedly connected with the workbench 5. The guide rail sliding block 16 is fixedly connected with the workbench 5 through bolts.

The grinding spindle 6 is a standard component and comprises a shell, a rotating spindle, a clamping ring, a bearing and the like, and when the grinding spindle is applied and implemented, in order to enable the assembly structure to be simple and reliable, a transmission mechanism between the input end of the grinding spindle 6 and the output shaft of the driving motor 3 is a V-belt transmission mechanism, and transmission is achieved through the V-belt 2. The shell of the grinding spindle 6 is fixedly arranged on the workbench 5 through a spindle fixing seat 4, and the spindle fixing seat 4 can be fixedly connected with the workbench 5 through bolts. The grinding wheel rod 8 is connected with the rotating main shaft of the grinding main shaft 6 through threads.

Correspondingly, on the basis of the machine tool spindle taper hole repairing device, the invention also provides a machine tool spindle taper hole repairing method, during repairing, the machine tool spindle taper hole repairing device is fixedly installed on a workbench of a machine tool through the base 1, after the installation is completed, the axis of the grinding wheel rod 8 is matched with the taper of the machine tool spindle taper hole 20, and when the grinding wheel rod 8 moves along the axis direction to feed, the grinding wheel rod 8 can grind the corresponding position of the machine tool spindle taper hole 20 to the set taper; in the repairing process, firstly, a machine tool is started to rotate a main shaft of the machine tool; and secondly, starting a driving motor 3 of the grinding device to enable the grinding wheel rod 8 to rotate around the self axis, then driving the grinding wheel rod 8 to move and feed along the axis direction by using a driving mechanism of the workbench 5, and completing the repair of the machine tool spindle taper hole 20 through the three composite motions. By adopting the repairing mode, the repairing precision is mainly ensured by the horizontal precision of the bottom surface and the taper precision of the inclined surface at the upper part of the base 1 in the manufacturing and processing processes, so that the phenomenon that the spindle taper hole 20 seriously abraded is taken as a reference is avoided, the effect of the spindle taper repairing precision can be effectively ensured to meet the expected requirement, and the installation and implementation are convenient.

For convenient installation and implementation, a workbench of the machine tool is provided with a clamping groove for installing the base 1, and the base 1 is fixedly connected to the workbench of the machine tool through bolts, screws, pins or the combination of the connecting pieces.

In order to effectively ensure the repairing quality, the machine tool spindle rotates at a low speed in the repairing process, and the specific rotating speed of the machine tool spindle is determined according to the repairing efficiency.