JPS58216934A - Wear testing method of blade used for motor grader - Google Patents

Abstract

PURPOSE:To achieve a testing approximate to running condition of an actual car by bringing a test piece of a blade into slide contact with the plane of a grinding wheel rotating at a given speed. CONSTITUTION:A grinding wheel frame 1 is filled with asphalt concrete mass pieces 2. An alumina cement 5 is packed into the gap between the circumferential surface of the pieces 2 and the frame surface to reinforce. A grinding wheel T thus formed is driven to rotate with a motor and a test piece S of a blade is continuously brought into slide contact with the plane thereof under a fixed load. Then, after a certain time, the wear property of the piece S is measured. This provides a highly reliable measured value very approximate to running condition of an actual car.

Description

[Detailed Description of the Invention] The present invention relates to a cutting blade wear test method used in motor graders, etc., and is designed to be the simplest and most economical method for testing the wear resistance of cutting blades. It is something.

In general, it goes without saying that the wear of steel cutting blades and urethane edges for removing snow from road surfaces is mainly caused by contact with asphalt concrete road surfaces.

For this reason, the method of testing the wear resistance of these steel cutting blades or urethane edges has been to actually attach test cutting blades to a vehicle such as a motor grader and drive the vehicle. They also tried repeatedly bringing a sample material of the cutting blade into contact with a known grindstone.

However, in the former case, it is a large-scale test method, and the test can only be carried out in a place where it can be actually driven, which is extremely uneconomical. However, there were inconveniences such as the inability to obtain very accurate measurement results due to the use of grindstones with different frictional resistances.

In view of the above-mentioned points, the present invention is designed to obtain test results in a state that closely resembles the actual running of various vehicles such as motor graders when performing wear resistance tests on cutting blades. In this process, a rotating grindstone frame is filled with asphalt concrete blocks that have been rough-processed into a roughly circular shape in advance, and the grindstone, which is reinforced by filling alumina cement between the circumferential surface and the above-mentioned grindstone frame, is rotated at a predetermined speed. The cutter blade is rotated by the blade, and the test piece of the cutting blade is continuously brought into sliding contact with the flat part under a predetermined load to test the degree of wear. .

The specific contents of the present invention will be explained below based on the embodiments shown in the drawings. Reference numeral 1 indicates a grindstone frame, and the grindstone frame is rotated by a motor (not shown) around a bearing 3. It is attached to the upper end of the drive shaft 6 for rotating the grindstone.

Note that 4 indicates reinforcing ribs arranged radially around the bearing 3.

Asphalt concrete block pieces 2 are inside the grindstone frame 1.
The asphalt concrete pieces 2 are selected from among the large amount of waste asphalt concrete blocks excavated during road surface renovation, and are selected from pieces of a size that can be charged into one circle of the above-mentioned grindstone frame, and then rough-processed. This is made into a substantially circular shape, and this is inserted into the grindstone frame 1.

Further, the gap between the curved surface of the asphalt concrete piece 2 and the grindstone frame is filled with alumina cement 5 for reinforcement, thereby completing the grindstone.

A grinding wheel T is formed as described above, and this is rotated by a motor (not shown), etc., and a test piece S of a cutting edge is continuously brought into sliding contact with the flat surface of the grinding wheel under a predetermined load for a certain period of time. This is to measure the degree of wear of the test piece S after the test piece S has passed.

As described above, the present invention involves charging an asphalt concrete block that has been rough-machined into a substantially circular shape in advance into a rotatable grinding wheel frame when conducting a corrosion test of a cutting blade used in a motor grader or the like. Compared to conventional test methods, this method not only eliminates the need for actual driving tests because the grinding wheel is similar to the actual driving road surface, but also allows highly reliable test measurements that closely approximate actual vehicle driving conditions. In addition, waste asphalt concrete blocks generated for road surface renovation can be used, contributing to resource conservation.
Moreover, it is not only more economical, but especially by filling the periphery of the roughly processed asphalt concrete block with alumina cement, the strength of the grinding wheel can be significantly improved.
kg/cd, 401 m/h), the wear test values obtained by measurement are extremely reliable, and testing can be carried out easily and economically. It produces the effects of the gods.

[Brief explanation of the drawing]

The drawings show an example of a grindstone used in carrying out the method of the present invention, and FIG. 1 is a plan view, FIG. 2 is a perspective view of the grindstone frame immediately before charging asphalt concrete chunks, and FIG.
The figure is a sectional view taken along the line II in FIG. 1. 1... Grinding wheel frame 2... Roughly processed asphalt concrete block piece 5-... Alumina cement S...O sample Figure 1

Claims (1)

[Claims] When performing wear tests on cutting blades used in motor graders, etc., a rotatable grinding wheel frame is filled with asphalt concrete chunks that have been rough-machined into a roughly circular shape, and the peripheral surface of the chunks and the above-mentioned A grindstone reinforced by filling the space between the grindstone frames with alumina cement is rotated at a predetermined speed, and a test piece of the cutting blade is continuously brought into sliding contact with the flat surface of the grindstone under a predetermined load. A cutting edge wear testing method characterized by testing the degree of wear.