CN102528608A - Combined polishing grinding head - Google Patents

Abstract

A combined polishing grinding head relates to the technical field of optical cold machining and comprises a rigid connector, a connecting screw, a grinding head core retainer and a plurality of grinding head cores. The rigid connector is connected onto a machine tool spindle and drives the whole grinding head to rotate, the connecting screw is used for connecting the rigid connector with the grinding head core retainer, and the grinding head core retainer is used for mounting the grinding head cores. Each grinding head core comprises a polishing die, a spring, a grinding head seat and a threaded connector, wherein the polishing die is adhered to the top end of the grinding head core, the spring is fixed to the tail end of the grinding head core, and the threaded connector at the tail end of the grinding head core is fixed onto the grinding head core retainer through a nut. An extremely small gap is reserved between an outer cylindrical surface of each grinding head core and an inner cylindrical surface of the grinding head core retainer to ensure that the grinding head core can axially and freely extend and retract, the extension length of each polishing die is changed by means of compression or stretching of the corresponding spring, and the polishing dies are used for removing materials. The service lives of the polishing dies can be prolonged, stability of the removing function of the grinding head is improved, and polishing precision is enhanced.

Description

A combined polishing grinding head

technical field

The invention relates to a polishing tool in the field of optical cold processing, in particular to a combined polishing grinding head capable of self-adapting according to the surface shape of a workpiece.

Background technique

The polishing process is the last process of optical cold processing, and the processing accuracy of the polishing process is directly related to the final accuracy of the workpiece. During the polishing process, the stability of the polishing grinding head has an important influence on the machining accuracy. In order to improve process performance and polishing efficiency, grooves with a depth of 1 mm to 2 mm are usually opened on the polishing mold of the polishing grinding head to store polishing particles and polishing liquid.

However, as the polishing time increases, the polishing mold is gradually worn away, and the grooves of the polishing mold gradually become shallower. After the groove becomes shallow, it gradually loses the function of storing polishing fluid, which affects the stability of the removal function of the grinding head during the entire polishing process, and also affects the polishing accuracy.

Contents of the invention

In order to solve the technical problem that the polishing die groove of the existing polishing grinding head gradually becomes shallower and loses the function of storing polishing liquid, thereby affecting the polishing accuracy, the present invention provides an adaptive combined polishing grinding head.

The technical solution adopted by the present invention to solve the technical problems is as follows:

A combined polishing grinding head, including a rigid connecting piece, a connecting screw, a grinding head core holder and a grinding head core. The rigid connecting piece is connected to the main shaft of a machine tool and drives the entire grinding head to rotate. The connecting Screws connect the rigid connector with the grinding head core holder, and the grinding head core holder is used to install and fix the grinding head core; Composition, the threaded connection piece is fixed on the grinding head core holder through the nut, the polishing die is bonded on the grinding head seat, one end of the spring is fixed on the threaded connection piece, and the other end is fixed on the grinding head seat; the grinding head core There is a small gap between the outer cylindrical surface and the inner cylindrical surface of the grinding head core holder to ensure that the grinding head core can be freely compressed in the axial direction, and the compression or stretching of the spring is used to change the extension length of the polishing die. Dies are used to achieve material removal.

The above-mentioned grinding head core holder has a plurality of inner holes for accommodating the grinding head core, and the bottom of the grinding head core holder is also provided with a polishing fluid jet outlet. The material of the polishing mold of the grinding head core can be tin, asphalt, polyurethane or other polymer materials. The grinding head core can be adaptively compressed according to the surface shape of the workpiece, so as to adapt to inclined surfaces, spherical surfaces, aspherical surfaces or other free-form surfaces.

The beneficial effects of the present invention are as follows:

1) Since the present invention forms a polishing die with grooves by combining and splicing a plurality of grinding head cores, it avoids slotting on the entire polishing die, thereby prolonging the service life of the polishing die and improving the stability of the polishing grinding head removal function sex.

2) Since the rear end of the grinding head core used in the present invention is provided with a spring, the grinding head core can self-adaptively follow the surface shape of the workpiece, thereby improving the fit between the polishing die and the surface of the workpiece.

3) Since the grinding head core holder of the present invention is provided with a polishing liquid jet outlet, the polishing liquid can be updated and supplemented for the polishing area at any time during the polishing process.

Description of drawings

Fig. 1 is a schematic structural view of the combined polishing grinding head of the present invention.

Fig. 2 is a schematic diagram of an arrangement of grinding head cores in the present invention.

Fig. 3 is a schematic structural view of the grinding head core in the present invention.

Fig. 4 is a schematic diagram of adapting the combined polishing grinding head of the present invention when the processing surface is an inclined surface.

Fig. 5 is a schematic diagram of another arrangement of grinding head cores in the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

As shown in FIG. 1 , the combined polishing grinding head of the present invention includes a rigid connector 1 , a coupling screw 2 , a grinding head core holder 3 and a grinding head core 4 . The rigid connector 1 is connected to the main shaft of the machine tool through taper fit and drives the entire grinding head to rotate.

The grinding head core holder 3 is connected with the rigid connector 1 through the coupling screw 2 . The grinding core holder 3 is designed with a plurality of inner holes for accommodating the grinding cores 4, and the diameter of the inner holes is slightly larger than the outer diameter of the grinding cores, so that the distance between the grinding cores can be adjusted. The width of the groove of the polishing die can be adjusted by changing the distance between the cores of the grinding head. As shown in FIG. 2 , a polishing fluid jet outlet 5 is designed at the bottom of the grinding head core holder 3 . The polishing liquid jet outlet 5 is connected with the polishing liquid inlet of the rigid connector 1 through a hose, so as to realize the supply of polishing liquid.

As shown in FIG. 3 , the grinding head core 4 is composed of a polishing die 41 bonded to the top, a spring 42 fixed at the tail end, a threaded coupling 43 and a grinding head seat 44 . The polishing mold 41 is used to realize the removal of materials, and its material is usually polyurethane or asphalt, and can also be tin or polymer materials. In order to prolong the service life, the thickness of the polishing mold 41 is usually 5-8 mm. The spring 42 at the tail end is used to ensure that the grinding head core 4 generates certain compression to adapt to the shape of the processed surface. The polishing mold 41 is fixed on the grinding head seat 44 by bonding. The threaded coupling 43 is used to fix the grinding core 4 on the mounting hole of the grinding core holder 3 . As shown in FIG. 2 , as a preferred manner, the grinding head core 4 and its polishing mold 41 are generally made in a square shape, and multiple grinding head cores are arranged in rows and columns. The grinding head core 4 and its polishing die 41 can also be made into a circular shape, and multiple grinding head cores are arranged in a manner of concentric circles. FIG. 5 is a schematic diagram of this arrangement.

Fig. 4 is a schematic diagram of adapting the combined polishing grinding head of the present invention when the processing surface is an inclined surface. Since the original length and compressive deformation of the spring 42 can be adjusted, the cutting force produced by the polishing die 41 on the inclined surface to be processed can be adapted to adjust, and then the polishing grinding head can be adapted to different processing surfaces.

Claims (5)

1. A combined polishing grinding head, characterized in that: the grinding head comprises a rigid connector (1), a grinding head core holder (3) and a plurality of grinding head cores (4), the rigid connecting member (1 ) is fixedly connected with the grinding head core holder (3) through the connecting screw (2); multiple grinding head cores (4) are respectively installed in multiple inner holes of the grinding head core holder (3), and the grinding head There is a gap between the outer cylindrical surface of the core (4) and the inner cylindrical surface of the grinding head core holder (3); the grinding head core (4) is composed of a polishing die (41), a spring (42), The threaded connector (43) and the grinding head seat (44) are composed, the polishing die (41) is fixed on the grinding head seat (44), one end of the spring (42) is fixed on the threaded connector (43), and the other end is fixed on the grinding head seat (44). on the head seat (44); the threaded connector (43) is fixed on the grinding head core holder (3) by a nut. 2. A combined polishing grinding head according to claim 1, characterized in that: the bottom of the grinding head core holder (3) is provided with a polishing fluid jet outlet (5). 3. A combined polishing grinding head according to claim 2, characterized in that: the polishing fluid jet outlet (5) is connected to the polishing fluid inlet of the rigid connector (1) through a hose (6). 4. A combined polishing grinding head according to claim 1, characterized in that: the material of the polishing mold (41) is tin or a polymer material. 5. A combined polishing grinding head as claimed in claim 4, characterized in that: said polymer material is asphalt or polyurethane.

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