阅读说明：本技术 一种凹球面研磨机 (Concave spherical surface grinding machine ) 是由 戴永斌 周存华 汤磊 占宏 王成萍 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种凹球面研磨机,其包括回转台、动力主轴和研磨杆,回转台上设置有用于夹持待加工件的三爪卡盘,动力主轴位于回转台的上方,研磨杆由动力主轴驱动旋转,研磨杆的底端设置有与待加工件表面接触的研磨头,动力主轴带动研磨杆相对于回转台摆动,且摆动原心位于回转台的旋转轴心上。上述凹球面研磨机利用任何尺寸两个圆相扣时都是整圆弧的原理,并采用主动旋转的研磨杆与被动旋转的回转台配合,实现研磨头与产品差速旋转地表面相接触,实现产品凹球面的研磨,加工速度高效,球面度和表面工艺高,结构简单,设备成本低,成型效果好。(The invention discloses a concave spherical surface grinding machine which comprises a rotary table, a power main shaft and a grinding rod, wherein a three-jaw chuck used for clamping a workpiece to be machined is arranged on the rotary table, the power main shaft is positioned above the rotary table, the grinding rod is driven to rotate by the power main shaft, a grinding head in contact with the surface of the workpiece to be machined is arranged at the bottom end of the grinding rod, the power main shaft drives the grinding rod to swing relative to the rotary table, and a swinging origin center is positioned on a rotating center of the rotary table. The concave spherical surface grinding machine utilizes the principle that two circles in any size are in a whole circular arc when buckled, and the grinding rod rotating actively is matched with the rotary table rotating passively, so that the grinding head is in contact with the surface of the product rotating at a differential speed, the concave spherical surface of the product is ground, the processing speed is high, the sphericity and the surface process are high, the structure is simple, the equipment cost is low, and the forming effect is good.)

1. The utility model provides a concave spherical surface grinds machine, its characterized in that, includes revolving platform, power main shaft and grinding rod, be provided with the three-jaw chuck that is used for the centre gripping to treat the machined part on the revolving platform, power main shaft is located the top of revolving platform, grinding rod by power main shaft drive is rotatory, the bottom of grinding rod be provided with treat the grinding head of machined part surface contact, power main shaft drives grinding rod is for the revolving platform swing, and the swing plummet is located the rotation axis of revolving platform.

2. The concave spherical surface grinder according to claim 1, wherein: and a lifting rod is arranged above the rotary table, the lifting rod and the rotary table are coaxial, and the power main shaft is hinged to the lifting rod.

3. The concave spherical surface grinder according to claim 1, wherein: the swing speed and the angle of the power main shaft are adjustable.

4. The concave spherical surface grinder according to claim 1, wherein: the rotary table is driven to rotate passively by the friction force of the grinding head and the workpiece to be machined.

5. The concave spherical surface grinder according to claim 1, wherein: the grinding head is sleeved on the grinding rod and is in key transmission, one side of the grinding head is attached to the limiting step, and the other side of the grinding head is limited by a retaining ring on the grinding rod.

Technical Field

The invention relates to the technical field of machining equipment, in particular to a concave spherical surface grinding machine.

Background

Most of the existing spherical surfaces in manufacturing are machined in a mode of interpolating motion by adopting a numerical control machine to simulate the spherical surfaces, and because the machining precision of the numerical control machine, the clamping force deformation of a clamp and other factors influence, the machined surfaces are not completely spherical surfaces actually and have surface microscopic deformation through the detection of a three-coordinate measuring instrument.

In the rotary joint using the spherical graphite and the concave spherical part for matching and sealing, the requirements on the spherical surfaces of the spherical graphite and the concave spherical part are high, and leakage can occur to influence the performance of the whole product as long as the concave spherical part is deformed or is not completely spherical and cannot be completely attached to the spherical graphite.

At present, the concave spherical surface is machined by adopting a conventional metal cutting machining mode, for example, the concave spherical surface is machined on a common machine tool by utilizing a profiling mold or a rotary clamp, due to the product characteristics of a rotary joint, the machined concave spherical surface is difficult to reach the target sphericity, the roundness, the surface roughness and the like cannot meet the process requirements, the machining efficiency is low, and the effect is general. In addition, the current advanced processing mode adopts a special numerical control machine tool, the equipment price is high, but the spherical surface processing technology is still difficult to further improve, and the problem of leakage caused by non-fit of the sealing surface of the rotary joint is not fundamentally solved.

Disclosure of Invention

The invention aims to provide a concave spherical surface grinding machine, which is used for forming a concave spherical surface in a precise grinding mode, and improving the sphericity and the sealing surface roughness of the concave spherical surface, so that the problem of leakage of a dynamic sealing surface of the spherical surface in a rotary joint is solved.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a concave spherical surface grinds machine, its includes revolving platform, power main shaft and grinding rod, is provided with the three-jaw chuck that is used for the centre gripping to treat the machined part on the revolving platform, and power main shaft is located the top of revolving platform, and the grinding rod is rotated by the drive of power main shaft, and the bottom of grinding rod is provided with and treats the grinding head of machined part surface contact, and power main shaft drives the grinding rod for the revolving platform swing, and the swing plummet is located the rotation axis of revolving platform.

Particularly, a lifting rod is arranged above the rotary table, the lifting rod and the rotary table are coaxial, and the power main shaft is hinged on the lifting rod.

Particularly, the swing speed and the swing angle of the power main shaft can be adjusted.

In particular, a base is arranged below the rotary table, a bearing is assembled between the rotary table and the base, and the rotary table is driven to rotate passively by the friction force between the grinding head and a workpiece to be machined.

Particularly, the bottom of the grinding rod is provided with a limiting step, the grinding head is sleeved on the grinding rod and is in key transmission, one side of the grinding head is attached to the limiting step, and the other side of the grinding head is limited by a retaining ring on the grinding rod.

Compared with the prior art, the concave spherical surface grinding machine has the advantages that the principle that two circles of any size are in a complete arc shape when buckled with each other is utilized, the grinding rod which rotates actively is matched with the rotary table which rotates passively, the grinding head is in contact with the ground surface of the product in differential rotation, the concave spherical surface of the product is ground, the processing speed is high, the sphericity and the surface process are high, the structure is simple, the equipment cost is low, and the forming effect is good.

Drawings

Fig. 1 is a schematic structural diagram of a concave spherical surface grinder according to an embodiment of the present invention.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Referring to fig. 1, the present embodiment provides a concave spherical surface grinder, which includes a rotary table 1, a power spindle 2 and a grinding rod 3.

The bottom of grinding rod 3 is provided with and treats grinding head 4 of machined part 9 surface contact, and the bottom of grinding rod 3 is provided with spacing step, and grinding head 4 cover is located on grinding rod 3 and through key transmission, and one side of grinding head 4 pastes with spacing step and leans on, and the opposite side is spacing by the retaining ring on the grinding rod 3.

The rotary table 1 is provided with a three-jaw chuck 5 used for clamping a workpiece 9 to be machined, a base 6 is arranged below the rotary table 1, a bearing 7 is assembled between the rotary table 1 and the base 6, and the rotary table 1 is driven to rotate passively by the friction force of the grinding head 4 and the workpiece 9 to be machined. The power main shaft 2 is positioned above the rotary table 1, and the grinding rod 3 is driven by the power main shaft 2 to rotate so as to provide main power and realize high-speed grinding.

The structure of the grinding head 4 rotating actively and the rotary table 1 rotating passively realizes differential contact grinding, and compared with the traditional method of providing friction power through the rotary table, the grinding power is stronger.

In particular, the power spindle 2 drives the grinding rod 3 to swing relative to the rotary table 1, the swing origin is located on the rotating axis of the rotary table 1, and the swing speed and the swing angle of the power spindle 2 are adjustable. The adjustable required angular direction of being convenient for of swing mode according to work piece diameter size, adjustment, and the mode of limit swing limit grinding is novel and high-efficient, and processing sphere roundness is high, and surface smoothness degree is good.

In addition, a lifting rod 8 is arranged above the rotary table 1, the lifting rod 8 and the rotary table 1 are coaxial, and the power spindle 2 is hinged on the lifting rod 8, so that the arc radius of the grinding head 4 can be adjusted.

In summary, the concave spherical surface grinding machine utilizes the principle that two circles of any size are all circular arcs when buckled, and adopts the matching of the grinding rod which rotates actively and the rotary table which rotates passively to realize the contact of the grinding head and the product differential rotation ground surface and realize the grinding of the concave spherical surface of the product, and has the advantages of high processing speed, high sphericity and surface process, simple structure, low equipment cost and good forming effect.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but is capable of various modifications and changes without departing from the spirit and scope of the invention, which are intended to be within the scope of the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.