CN110936241A

CN110936241A - Device for grinding fiber inner diameter shaft sleeve after pressing and operation method thereof

Info

Publication number: CN110936241A
Application number: CN201911323432.5A
Authority: CN
Inventors: 秦政琪; 邹爱丽; 张业伟; 徐波; 马怀玺
Original assignee: Shenyang Aerospace University
Current assignee: Shenyang Aerospace University
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-03-31

Abstract

The invention belongs to the field of aviation grinding machining, and particularly relates to a device for grinding a fiber inner diameter shaft sleeve on an airplane after pressing and a using method thereof. The device comprises a clamping mechanism and a knife with adjustable diameter. The clamping mechanism is of a symmetrical structure, and the upper threaded hole and the lower threaded hole are respectively in threaded connection with the two cup head bolts; two sides of the clamping mechanism are respectively provided with two unequal round holes for placing a small bearing and a large bearing, and the diameter-adjustable knife is connected with the clamping mechanism through the small bearing and the large bearing. The method mainly plays a positioning and clamping function of a joint and a cutter, and firstly, a small bearing, a gland bolt, a small gland, a pressure pad, a clamping mechanism, a cup head bolt, a large bearing and a large gland are sleeved on a joint lug; and then the adjustable diameter knife grinder is inserted from the large gland end of the clamping mechanism, and the grinding is started after the alignment adjustment. Only the bushing needing to be ground needs to be replaced and the grinding amount is adjusted in the operation process, so that the time is saved, the efficiency is improved, and the required precision can be achieved more easily.

Description

Device for grinding fiber inner diameter shaft sleeve after pressing and operation method thereof

Technical Field

The invention belongs to the field of aviation grinding machining, and particularly relates to a clamping and grinding mechanism for an accurate aperture pre-grinding knife of a fiber inner wall shaft sleeve on an airplane, in particular to a device for grinding a fiber inner diameter shaft sleeve after pressing and a using method thereof.

Background

The flaperon is an important control surface installed at the trailing edge of the wing, plays a role in changing the flying attitude when the airplane takes off, lands and flies, and is an indispensable main component of a modern airplane. The flaperon is connected with the rear wall of the wing through hole-shaft matching.

In order to ensure the motion accuracy of the flaperon, the requirement on the precision of the fit clearance of the hole shaft of the flaperon pull rod is high, but the flaperon is worn through the hole shaft of the swing pull rod in flight, and the flaperon shakes to influence the performance of the airplane when the clearance is too large. In order to improve the wear resistance of the flaperon hole shaft, a shaft sleeve with wear-resistant fiber adhered to the inner wall and good in wear resistance is adopted as a hole shaft friction pair. The shaft sleeve with the fiber inner wall is connected with the hole of the joint fork lug in a press fit mode in an interference fit mode, but after the shaft sleeve in the interference fit mode is pressed with the connecting rod joint lug in an assembling process, the inner diameter of the shaft sleeve can change due to the size of an extrusion effect, and under the conditions of the existing processing precision and the press fit means, the inner diameter of the shaft sleeve cannot completely meet the expected precision requirement, so that the hole-shaft gap is often out of tolerance. The inner wall shaft sleeve of the fiber cannot be subjected to aperture correction through reaming, so that the aperture shaft clearance value deviation is large, the abrasion state is unstable, and the flight performance of the airplane is influenced. In the prior art, the hole shaft clearance is ensured by performing high-precision processing in advance before the machine is installed, the qualified rate of shaft sleeve processing is only 10%, the cost of the shaft sleeve is greatly increased, and manpower and material resources are seriously wasted.

Disclosure of Invention

The invention provides a device for grinding a fiber inner diameter shaft sleeve after lamination with a novel structure, and aims to design a set of grinding device for clamping a diameter-adjustable knife and the fiber inner diameter shaft sleeve after lamination during pre-grinding aiming at the technical defects of the hole shaft of the pull rod of the traditional flaperon. Another object of the present invention is to provide a convenient and flexible method of operation for the above-mentioned apparatus.

The purpose of the invention is realized by the following technical scheme: a device for grinding a fiber inner diameter shaft sleeve after pressing comprises a clamping mechanism and a diameter-adjustable knife.

Furthermore, the clamping mechanism is of a symmetrical structure, and the upper threaded hole and the lower threaded hole are respectively in threaded connection with the two cup head bolts;

furthermore, the end parts of the cup head bolts are respectively connected with a pressure pad to compress the joint lug with the bush.

Two unequal round holes are formed in the two sides of the clamping mechanism respectively and used for placing a small bearing and a large bearing, the diameter-adjustable knife sharpener is connected with the clamping mechanism through the small bearing and the large bearing, a small gland and a large gland are arranged on the two sides of the clamping mechanism respectively and connected with the clamping mechanism through bolts for preventing bearing vibration, the small gland is matched with the small bearing, and the large gland is matched with the large bearing.

The operation method of the device for grinding after pressing the fiber inner diameter shaft sleeve comprises the following steps:

the method mainly plays a positioning and clamping function of a joint and a cutter, and firstly, a small bearing, a gland bolt, a small gland, a pressure pad, a clamping mechanism, a cup head bolt, a large bearing and a large gland are sleeved on a joint lug; and then inserting the adjustable-diameter cutter from the end of the large gland of the clamping mechanism, inserting the effective working part of the adjustable-diameter cutter into the bushing, then starting to align and adjust to enable the axis of the adjustable-diameter cutter, the axis of the circular bushing and the circle center of the large gland to be on the same straight line, and screwing the cup head bolt to start grinding. After grinding is finished, the diameter-adjustable knife grinder is taken out, and then the cup head bolt is rotated anticlockwise to take down the combined body, so that the grinding work can be finished.

The beneficial effects and characteristics of the invention

The invention can grind the bush quantitatively, and solves the technical problems of low qualification rate and low working efficiency of the existing manual clamping grinding bush. In the operation process, workers only need to replace the bushing to be ground and adjust the grinding amount of the diameter-adjustable knife grinder, so that the construction time is saved, the construction efficiency is greatly improved, and the personnel cost of enterprises is directly saved. The invention can avoid the vibration between the knife grinder and the bushing, and realize better control of the grinding amount and the grinding precision of the knife grinder, so that the knife grinder can more easily reach the required precision.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a rear view of fig. 1.

Detailed description of the preferred embodiments

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-3, a device for grinding a fiber inner diameter shaft sleeve after pressing comprises a clamping mechanism 8 and a diameter-adjustable knife 3. The clamping mechanism 8 is of a symmetrical structure, and the upper threaded hole and the lower threaded hole are respectively in threaded connection with the two cup head bolts 9. A pressure pad 7 is respectively connected to the end of the cup head bolt 9 to press the joint lug 1 with the bush 2. Two unequal round holes are respectively formed in two sides of the clamping mechanism 8 and used for placing the small bearing 4 and the large bearing 10, the diameter-adjustable knife blade 3 is connected with the clamping mechanism 8 through the small bearing 4 and the large bearing 10, a small gland 6 and a large gland 11 are respectively arranged on two sides of the clamping mechanism 8 and connected with the clamping mechanism 8 through bolts 5 in order to prevent bearing vibration, the small gland 6 is matched with the small bearing 4, and the large gland 11 is matched with the large bearing 10.

The operation method of the device for grinding the pressed fiber inner diameter shaft sleeve comprises the following steps:

the method mainly has the functions of positioning and clamping the joint and the cutter: firstly, sleeving a combination of a small bearing 4, a gland bolt 5, a gland 6, a pressure pad 7, a clamping mechanism 8, a cup head bolt 9, a large bearing 10 and a large gland 11 on a joint lug 1; and then the adjustable diameter sharpeners 3 are inserted from the end of the large gland 11 of the clamping mechanism 8, the effective working parts of the adjustable diameter sharpeners 3 are inserted into the bush 2, then the alignment adjustment is started, the axial line of the adjustable diameter sharpeners 3, the axial line of the circular bush and the circle center of the large gland 11 are on the same straight line, and the grinding can be started by screwing the cup head bolts 9. After grinding is finished, the diameter-adjustable knife 3 is taken out, and then the cup head bolt 9 is rotated anticlockwise to take down the combination body, so that grinding work can be finished.

The working process of the invention is as follows: the bush that connects in the ear is fixed grinding object, connects the ear through the pressure pad centre gripping, has the bush in connecting the ear endotheca, for the internal diameter size and the inside surface finish of bush of guaranteeing the bush, is connected with fixture 8 with novel grinding whetstone-fibre internal diameter axle sleeve grinding whetstone through the bearing, and the bearing not only can be to whetstone location, guarantees that the axle of whetstone and the axle of bush are on same straight line, can also reduce the vibrations and the loss of whetstone at the rotation in-process. Adopt 8 bolted connection respectively on the gland of two bearings, on the one hand consider bolt and holistic intensity problem, with the cooperation performance of whetting a knife, on the other hand has guaranteed the reliable performance of anchor clamps. The clamping mechanism 8 designed by the invention is used for clamping the bushing and grinding the knife with adjustable diameter, and the precision requirement is met by pre-grinding the bushing, so that the replacement step is omitted, and the construction efficiency is improved.

The above description is only for reference to an embodiment of the present invention and should not be taken as limiting the invention, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a device of grinding after pressfitting of fibre internal diameter axle sleeve which characterized in that: the device comprises a clamping mechanism and a diameter-adjustable knife grinder, wherein the clamping mechanism is of a symmetrical structure, and the upper threaded hole and the lower threaded hole are respectively in threaded connection with two cup head bolts; two sides of the clamping mechanism are respectively provided with two unequal round holes for placing a small bearing and a large bearing, and the diameter-adjustable knife is connected with the clamping mechanism through the small bearing and the large bearing.

2. The apparatus for grinding a fiber inner diameter bushing after press-fitting as claimed in claim 1, wherein: the end part of the cup head bolt is respectively connected with a pressure pad to compress the joint lug with the bush, a small gland and a large gland are respectively arranged on two sides of the clamping mechanism for preventing the bearing from vibrating and are connected with the clamping mechanism through bolts, the small gland is matched with the small bearing, and the large gland is matched with the large bearing.

3. The method for operating the apparatus for grinding after pressing the fiber inner diameter bushing according to any one of claims 1 and 2 comprises:

the method mainly plays a positioning and clamping function of a joint and a cutter, and firstly, a small bearing, a gland bolt, a small gland, a pressure pad, a clamping mechanism, a cup head bolt, a large bearing and a large gland are sleeved on a joint lug; and then inserting the adjustable diameter grinding knife from the end of the large gland of the clamping mechanism, inserting the effective working part of the adjustable diameter grinding knife into the bushing, then starting to align and adjust to enable the axis of the adjustable diameter grinding knife, the axis of the circular bushing and the circle center of the large gland to be on the same straight line, screwing the cup head bolt to start grinding, taking out the adjustable diameter grinding knife after grinding is finished, and then rotating the cup head bolt anticlockwise to take down the assembly to finish grinding work.