CN203650229U

CN203650229U - Grinding tool

Info

Publication number: CN203650229U
Application number: CN201320836650.0U
Authority: CN
Inventors: 王强; 庞大巍; 郭奇
Original assignee: Shenyang Aerospace Xinle Co Ltd
Current assignee: Shenyang Aerospace Xinle Co Ltd
Priority date: 2013-12-18
Filing date: 2013-12-18
Publication date: 2014-06-18
Anticipated expiration: 2023-12-18

Abstract

The utility model relates to a grinding tool. A lower rotary shaft is arranged on the upper surface of a base, and the rotary shaft is coaxially connected with a lower grinding disc; an upper connecting plate is arranged above the base in parallel, the lower surface of the upper connecting plate is coaxially connected with an upper grinding disc through an upper rotary shaft, and the lower rotary shaft and the upper rotary shaft coaxially and reversely rotate at the same speed; a partition plate is arranged between the upper grinding disc and the lower grinding disc in parallel; a plurality of long grooves are symmetrically formed in the circumference of the partition plate; the cavities of the long grooves are internally in clearance fit with the periphery of a short shaft to be processed, wherein the clearance is 1 mm; the angle alpha formed by the center line of the long grooves in the length direction and a connecting line from the center point of the short edge of the bottom to the center of the partition plate is 15-20 degrees; after the short shaft to be processed is put into the long grooves, the outer circumference of the short shaft are in linear contact with the grinding surfaces of the upper grinding disc and the lower grinding disc respectively. Due to the adoption of the grinding tool, the processing cost can be greatly reduced while the outer circle of a part is higher in precision, the production rate is increased, and large-batch production is facilitated.

Description

A kind of grinding tool

Technical field

The invention relates to a kind of grinding tool, belongs to a kind of field of milling.

Background technology

Total known axial workpiece Excircle machining generally can adopt the methods such as turning, cylindrical grinding, centreless grinding cylindrical to ensure part outer form and position tolerance and size.If but cylindrical Geometrical Tolerance Principle is when very high, as cylindricity is less than at 0.002 o'clock, surface roughness requires 0.2 when above, with above-mentioned several processing methods are very difficult guarantees.As adopting high-precision grinder, its processing cost is very high, is unfavorable for batch production.

Summary of the invention

The technical problem that the invention will solve is to provide a kind of grinding tool, adopts this frock can greatly cut down finished cost in ensureing part outer degree of precision, boosts productivity, and is applicable to large batch of production.

For overcoming the above problems, the concrete technical scheme of the invention is as follows: a kind of grinding tool, is provided with Shaft at the upper surface of pedestal, the coaxial lower end abrasive disk that connects on Shaft; The upper junction plate that be arranged in parallel above pedestal, the lower surface of upper junction plate connects upper end abrasive disk by upper rotating shaft coaxle, and Shaft and upper rotating shaft coaxle counter-rotate with rotating speed; Between upper end abrasive disk and lower end abrasive disk, be provided with the dividing plate be arrangeding in parallel, on dividing plate, be provided with circumference and be symmetrical arranged several elongated slots, in the cavity of elongated slot, be the matched in clearance of 1mm with minor axis surrounding to be processed, angle [alpha]=15 that wherein central point of the center line of elongated slot length direction and bottom minor face forms to the line at dividing plate center °～20 °; Minor axis to be processed is put into after elongated slot, and the excircle of minor axis contacts with the grinding upper thread of upper end abrasive disk and lower end abrasive disk respectively.

The present invention has adopted simple grinding tool, and the dividing plate arranging by centre carries out spacing to the minor axis of processing, and reaches the object of high accuracy cylindrical lapping by the same rotating speed reversion of upper end abrasive disk and lower end abrasive disk.Simple in structure, process is feasible, has ensured the degree of precision of part outer, and has saved production cost, has improved working (machining) efficiency.

Brief description of the drawings

Fig. 1 is the structural representation of grinding tool.

Fig. 2 is dividing plate top view.

Fig. 3 is the rear minor axis structural representation of processing.

Detailed description of the invention

As depicted in figs. 1 and 2, a kind of grinding tool, is provided with Shaft 6 at the upper surface of pedestal 7, the coaxial lower end abrasive disk 5 that connects on Shaft 6; The upper junction plate 8 that be arranged in parallel above pedestal 7, the lower surface of upper junction plate 8 connects upper end abrasive disk 2 by upper rotating shaft 1 is coaxial, and Shaft 6 coaxially counter-rotates with rotating speed with upper rotating shaft 1; Between upper end abrasive disk 2 and lower end abrasive disk 5, be provided with the dividing plate 4 be arrangeding in parallel, on dividing plate 4, be provided with circumference and be symmetrical arranged 12 elongated slots 9, like this can 12 minor axises of disposable grinding, thus improve operating efficiency; In the cavity of elongated slot 9, be the matched in clearance of 1mm with minor axis surrounding to be processed, angle [alpha]=15 that wherein center line of elongated slot 9 length directions and the central point of bottom minor face form to the line at dividing plate center °～20 °, this angle has ensured the quality of grinding, and has improved the grinding precision of minor axis; Minor axis to be processed is put into after elongated slot 9, and the excircle of minor axis contacts with the grinding upper thread of upper end abrasive disk 2 and lower end abrasive disk 5 respectively.

The method of utilizing grinding tool to grind minor axis high accuracy, comprises the following steps:

1) minor axis two ends arrange technique axle, and carry out rough turn Excircle machining;

2) fine cylindrical, stays grind 0.04～0.05mm;

3) technique axle is removed, and abate sharp edge, deburring;

4) abradant surface of finishing upper end abrasive disk 2 and lower end abrasive disk 5, ensures that the flatness of abradant surface is respectively 0.001;

5) on the abradant surface of upper end abrasive disk 2 and lower end abrasive disk 5, smear grounds travel or abrasive pastes, and minor axis is placed in the elongated slot 9 of dividing plate 4, and in exerting pressure on upper junction plate 8, Shaft 6 oppositely rotates with rotating speed with upper rotating shaft 1, slightly grind rotating speed at 50～60m/min, smooth grinding rotating speed is at 20～30m/min, the transposition of the minor axis workpiece more than carrying out once in smooth grinding process, meets required precision until be ground to.

As shown in Figure 3, above method is suitable for the outside diameter tolerance of minor axis below h6, and cylindricity tolerance is on the order of magnitude of some thousandths of, and not only efficiency is high, and can reach required precision.

Claims

1. a grinding tool, its spy is being: be provided with Shaft (6) at the upper surface of pedestal (7), the upper coaxial lower end abrasive disk (5) that connects of Shaft (6); The upper junction plate (8) that be arranged in parallel in the top of pedestal (7), the lower surface of upper junction plate (8) coaxially connects upper end abrasive disk (2) by upper rotating shaft (1), and Shaft (6) coaxially counter-rotates with rotating speed with upper rotating shaft (1); Between upper end abrasive disk (2) and lower end abrasive disk (5), be provided with the dividing plate (4) be arrangeding in parallel, on dividing plate (4), be provided with circumference and be symmetrical arranged several elongated slots (9), in the cavity of elongated slot (9), be the matched in clearance of 1mm with minor axis surrounding to be processed, angle [alpha]=15 that wherein center line of elongated slot (9) length direction and the central point of bottom minor face form to the line at dividing plate center °～20 °; Minor axis to be processed is put into after elongated slot (9), and the excircle of minor axis contacts with the grinding upper thread of lower end abrasive disk (5) with upper end abrasive disk (2) respectively.