阅读说明：本技术 模块化直线度在线测量装置 (Modularization straightness accuracy on-line measuring device ) 是由 李彬 吴媛媛 席建普 赵则祥 任东旭 于 2019-11-05 设计创作，主要内容包括：本发明公开了一种模块化直线度在线测量装置,包括基座、罩体和直线度测量单元,所述基座的中部设有凸台,凸台的上部设有水平的凸台面；所述直线度测量单元的一侧活动设置在凸台面和罩体之间,且直线度测量单元与凸台面相配合,直线度测量单元的另一侧设置在罩体的外侧；所述罩体设置在基座的上部。本发明基座、外罩、前端端盖、后端端盖和侧面密封条构成了在线测量装置的基准单元和防护单元,凸台面用作直线度测量的基准,测微仪安装座和电容测微仪组成了在线测量装置的采样测量单元,基准单元与采样测量单元的相互配合有效完成了直线度的在线测量；防护单元避免了基准面的污染,因此更加适应于机床加工过程中的切削液和油雾的环境。(The invention discloses a modular linearity online measuring device which comprises a base, a cover body and a linearity measuring unit, wherein a boss is arranged in the middle of the base, and a horizontal boss surface is arranged at the upper part of the boss; one side of the straightness measuring unit is movably arranged between the boss surface and the cover body, the straightness measuring unit is matched with the boss surface, and the other side of the straightness measuring unit is arranged on the outer side of the cover body; the cover body is arranged on the upper part of the base. The base, the outer cover, the front end cover, the rear end cover and the side sealing strips form a reference unit and a protection unit of the online measuring device, the boss surface is used as a reference for linearity measurement, the micrometer mounting base and the capacitance micrometer form a sampling measuring unit of the online measuring device, and the reference unit and the sampling measuring unit are mutually matched to effectively finish online linearity measurement; the protection unit avoids the pollution of the reference surface, so the protection unit is more suitable for the environment of cutting fluid and oil mist in the machining process of the machine tool.)

1. A modularization straightness online measuring device comprises a base (1) and a straightness measuring unit movably arranged on the upper portion of the base (1), and is characterized by further comprising a cover body, wherein a boss is arranged in the middle of the base (1), and a horizontal boss surface (1-1) is arranged on the upper portion of the boss; one side of the straightness measuring unit is movably arranged between the boss surface (1-1) and the cover body, the straightness measuring unit is matched with the boss surface (1-1), and the other side of the straightness measuring unit is arranged on the outer side of the cover body; the cover body is arranged on the upper part of the base (1).

2. The on-line modular straightness measuring device according to claim 1, wherein the straightness measuring unit comprises a capacitance micrometer (3) and a micrometer mounting base (4), one side of the micrometer mounting base (4) is provided with a slotted hole, and the other side of the micrometer mounting base (4) is provided with a wiring hole; the capacitance micrometer (3) is arranged in the slotted hole, and a data transmission line of the capacitance micrometer (3) is led out through the wiring hole; the capacitance micrometer (3) is arranged in the cover body, and the capacitance micrometer (3) is matched with the convex table surface (1-1).

3. The modular linearity online measuring device according to claim 2, characterized in that a gap is left between the bottom surface of the capacitance micrometer (3) and the boss surface (1-1).

4. The modular linearity online measuring device according to claim 2 or 3, wherein the cover body comprises a front end cover (10), a rear end cover (17) and a housing (2), and the front end cover (10) and the rear end cover (17) are symmetrically and fixedly arranged on the upper part of the base (1); the outer cover (2) is arranged between the front end cover (10) and the rear end cover (17), and the outer cover (2) is fixedly connected with the base (1); one side of the micrometer mounting seat (4) is arranged between the outer cover (2) and the boss surface (1-1), and the other side of the micrometer mounting seat (4) is arranged on the outer side of the outer cover (2).

5. The modular linearity online measuring device according to claim 4, wherein one side of the outer cover (2) is provided with a groove (2-1), and the middle part of the micrometer mounting seat (4) is arranged in the groove (2-1); the height of the upper end surface of the groove (2-1) is lower than that of the boss surface (1-1).

6. The on-line modular straightness measuring device according to any one of claims 2, 3 and 5, wherein a side sealing strip (27) is arranged below the micrometer mounting base (4), and the side sealing strip (27) is fixedly connected with the base (1).

7. The modular linearity online measuring device according to claim 6, wherein a counter bore I is arranged at one end of the micrometer mounting seat (4) far away from the slotted hole, and the micrometer mounting seat (4) is connected with a moving part of a machine tool linear motion shaft through the counter bore I.

8. The modular linearity online measuring device of claim 1 or 7, wherein the base (1) is provided with a counter bore II, and the base (1) is connected with a fixed part of a machine tool linear motion shaft through the counter bore II.

Technical Field

The invention belongs to the technical field of ultra-precision measurement, and particularly relates to a modular online measuring device for the straightness of a linear feed shaft.

Background

With the development of modern precision machining technology, in order to improve the machining precision of parts, on-line compensation needs to be carried out on the precision of a machine tool, and the precision compensation is mainly aimed at the positioning precision of a linear feed shaft at present; due to the influence of factors such as gravity, temperature rise, large stroke and the like, the straightness compensation problem becomes an important factor which restricts the machining precision of the machine tool at present.

In order to realize the online compensation technology of the straightness, the problem of online measurement of the straightness of a straightness motion shaft needs to be solved.

Disclosure of Invention

The invention provides a modularized online straightness measuring device, aiming at solving the problem that the existing straightness moving shaft cannot be measured online, and solving the problem of online straightness measuring of the existing straightness moving shaft in the machining process of a modern machine tool.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a modular linearity online measuring device comprises a base, a cover body and a linearity measuring unit movably arranged on the upper portion of the base, wherein a boss is fixedly arranged in the middle of the base, a horizontal boss surface is arranged on the upper portion of the boss, and the boss surface is used as a reference for linearity measurement; one side of the straightness measuring unit is movably arranged between the boss surface and the cover body, and the straightness measuring unit is matched with the boss surface to sample the straightness of the boss surface; the other side of the straightness measuring unit is arranged on the outer side of the cover body; the cover body is fixedly arranged on the upper part of the base. When the moving part does linear motion, the moving part drives the linearity measuring unit to horizontally and linearly slide above the boss surface.

The straightness measuring unit comprises a capacitance micrometer and a micrometer mounting seat, one side of the micrometer mounting seat is provided with a slotted hole, and the other side of the micrometer mounting seat is provided with a wiring hole; the capacitance micrometer is fixedly arranged in the slotted hole, and a data transmission line of the capacitance micrometer is led out through the wiring hole; the capacitance micrometer is arranged in the cover body, and the capacitance micrometer is matched with the boss surface. The capacitance micrometer and the capacitance micrometer mounting seat form a sampling measuring unit of the linearity online measuring device.

A gap is reserved between the bottom surface of the capacitance micrometer and the boss surface, so that friction between the capacitance micrometer and the boss surface is reduced, and sliding of the capacitance micrometer is facilitated.

The cover body comprises a front end cover, a rear end cover and an outer cover, and the front end cover and the rear end cover are symmetrically and fixedly arranged on the upper part of the base; the outer cover is arranged between the front end cover and the rear end cover and fixedly connected with the base, and the outer cover, the front end cover, the rear end cover and the base form a boss sealing structure; one side of the micrometer mounting seat is arranged between the outer cover and the boss surface, the other side of the micrometer mounting seat is arranged on the outer side of the outer cover, and the micrometer mounting seat is connected with a moving part of a linear motion shaft of the machine tool.

A groove is formed in one side of the outer cover, and the middle of the micrometer mounting seat is arranged in the groove; the height of the upper end surface of the groove is lower than that of the boss surface, so that the boss surface can be protected from the influence of the cutting fluid in a working environment with the cutting fluid.

The side sealing strips are fixedly connected with the base, and the side sealing strips serve as bearing units of the micrometer mounting base on one hand and play a role in isolating the boss from an external working environment on the other hand.

One end of the micrometer mounting seat, which is far away from the grooving hole, is provided with a counter bore I, and the micrometer mounting seat is connected with a moving part of a linear motion shaft of the machine tool through the counter bore I. And the base is provided with a counter bore II, and the base is connected with a moving part of the linear motion shaft of the machine tool through the counter bore II.

The invention has the beneficial effects that:

the base, the outer cover, the front end cover, the rear end cover and the side sealing strips form a reference unit and a protection unit of the online measuring device, the boss surface is used as a reference for linearity measurement, the micrometer mounting base and the capacitance micrometer form a sampling measuring unit of the online measuring device, the reference unit and the sampling measuring unit are matched with each other to effectively complete online linearity measurement, meanwhile, the modularized design is realized, the measured data is accurate, the protection unit plays a role in avoiding the pollution of the reference surface, and the online measuring device can be suitable for the environments of cutting fluid and oil mist in the machining process of a machine tool.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a top view of the present invention.

FIG. 2 is a schematic diagram of FIG. 1 taken from A-A.

Fig. 3 is a partially enlarged view of B in fig. 1.

Fig. 4 is a schematic structural diagram of the present invention.

In the figure, 1 is a base, 1-1 is a boss surface, 2 is an outer cover, 2-1 is a groove, 3 is a capacitance micrometer, 4 is a micrometer mounting base, 5 is a first screw, 6 is a second screw, 7 is a third screw, 8 is a fourth screw, 9 is a fifth screw, 10 is a front end cover, 11 is a sixth screw, 12 is a seventh screw, 13 is an eighth screw, 14 is a ninth screw, 15 is a tenth screw, 16 is an eleventh screw, 17 is a rear end cover, 18 is a twelfth screw, 19 is a thirteenth screw, 20 is a fourteenth screw, 21 is a fifteenth screw, 22 is a sixteenth screw, 23 is a seventeenth screw, 24 is an eighteenth screw, 25 is a nineteenth screw, 26 is a twentieth screw, 27 is a side seal strip, 28 is a twenty-first screw, 29 is a twenty-second screw, and 30 is a twenty-third screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

A modularization straightness online measuring device is shown in figure 2 and comprises a base 1 fixed with a machine tool, a cover body used for protecting a measuring reference surface and a straightness measuring unit used for straightness sampling measurement, wherein a boss is arranged in the middle of the base 1 and is integrally formed with the base 1; the upper part of the boss is provided with a horizontal boss surface 1-1, the boss surface 1-1 is processed by adopting a polishing process, and the boss surface has higher flatness to be used as an online measurement reference of straightness; one side of the straightness measuring unit is movably arranged between the boss surface 1-1 and the cover body, and the straightness measuring unit is matched with the boss surface 1-1 to sample the straightness of the boss surface 1-1; the other side of the straightness measuring unit is arranged on the outer side of the cover body; the cover body is fixedly arranged on the upper part of the base 1. When the machine tool linear motion shaft is in linear motion, the moving part drives the linearity measuring unit to horizontally and linearly slide above the boss surface 1-1.

The straightness measuring unit comprises a capacitance micrometer 3 and a micrometer mounting seat 4, one side of the micrometer mounting seat 4 is provided with a slotted hole, two sides of the slotted hole are symmetrically provided with threaded holes, and the other side of the micrometer mounting seat 4 is provided with a wiring hole; one side of the micrometer mounting seat 4 provided with the slotted hole is arranged in the cover body, and one side of the micrometer mounting seat 4 provided with the wiring hole is arranged outside the cover body so as to be connected with a moving part of a linear motion shaft of a machine tool; as shown in fig. 3, the capacitance micrometer 3 is fixedly arranged in the slotted hole by the capacitance micrometer 3 through the cooperation of the first screw 5 and the threaded hole, so as to fix the capacitance micrometer 3; the data transmission line of the capacitance micrometer 3 is led out through the wiring hole so as to be conveniently connected with external equipment through the data transmission line; the capacitance micrometer 3 is arranged in the cover body, the capacitance micrometer 3 is arranged right above the convex table surface 1-1, and the capacitance micrometer 3 is matched with the convex table surface 1-1 to sample the straightness of the convex table surface 1-1; in order to reduce the friction between the capacitance micrometer 3 and the convex table surface 1-1 and facilitate the sliding of the capacitance micrometer 3, a gap is reserved between the bottom surface of the capacitance micrometer 3 and the convex table surface 1-1; in this embodiment, according to the measurement requirement of the capacitance micrometer, the size of the gap is 1mm, and the up-down deviation is required to be controlled within ± 0.2 mm.

The capacitance micrometer 3 and the capacitance micrometer mounting seat 4 are sampling measurement units, the capacitance micrometer 3 can sample the convex surface 1-1 and then can export the sampled data through a data transmission line, and the micrometer mounting seat 4 is used for bearing the capacitance micrometer 3.

As shown in fig. 2, the cover body comprises a front end cover 10, a rear end cover 17 and a cover 2, the front end cover 10 is fixedly arranged on the upper portion of the base 1 through a third screw 7, a fourth screw 8, a sixth screw 11 and an eighteenth screw 24, the rear end cover 17 is fixedly arranged on the upper portion of the base 1 through an eleventh screw 16, a twelfth screw 18, a fourteenth screw 20 and a sixteenth screw 22, and the front end cover 10 and the rear end cover 17 are symmetrically arranged; the outer cover 2 is arranged between the front end cover 10 and the rear end cover 17, the front part of the outer cover 2 is fixedly connected with the base 1 through a seventh screw 12, the middle part of the outer cover 2 is fixedly connected with the base 1 through a ninth screw 14, and the rear part of the outer cover 2 is fixedly connected with the base 1 through a tenth screw 15; the seventh screw 12, the ninth screw 14 and the tenth screw 15 are all arranged on one side of the outer cover 2 away from the micrometer mounting base 4, so that the seventh screw 12, the ninth screw 14 and the tenth screw 15 are prevented from interfering with the micrometer mounting base 4 when the micrometer mounting base 4 moves; one side of the micrometer mounting seat 4 is arranged between the outer cover 2 and the boss surface 1-1, and the other side of the micrometer mounting seat 4 is arranged on the outer side of the outer cover 2.

A groove 2-1 is formed in one side of the outer cover 2, and the middle of the micrometer mounting seat 4 is arranged in the groove 2-1; the height of the upper end face of the groove 2-1 is lower than that of the boss face 1-1, so that the boss face 1-1 is guaranteed not to be polluted by cutting fluid in a working environment with the cutting fluid.

A side sealing strip 27 is arranged below the groove 2-1, and the side sealing strip 27 is fixedly connected with the base 1 through a twenty-first screw 28, a twenty-second screw 29 and a twenty-third screw 30. The base 1, the outer cover 2, the front end cover 10, the rear end cover 17 and the side sealing strips 27 are used as reference units of the device, the reference units can also be used as protection units for placing the capacitance micrometer 3, and the boss surface 1-1 can be protected from the influence of cutting fluid.

As shown in fig. 4, a counter bore is formed in one end of the micrometer mounting base 4, which is far away from the slotted hole, and the micrometer mounting base 4 can be connected with a moving part of a measured linear motion shaft of the machine tool by screwing a nineteenth screw 25 and a twentieth screw 26 into the counter bore; counter bores are uniformly formed in the base 1, and the base 1 can be connected with a fixing part of a linear motion shaft of a machine tool by screwing fifth screws 9, eighth screws 13, second screws 6, thirteenth screws 19, fifteenth screws 21 and seventeenth screws 23 into the counter bores. The movement of the linear motion shaft enables the reference unit and the sampling measurement unit to move relatively, so that the boss surface 1-1 is sampled, and the on-line measurement of the linearity of the linear motion shaft is completed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.