CN104458468B - Abrasion testing device for boundary surface of mechanical part - Google Patents

Abstract

The invention discloses an abrasion testing device for a boundary surface of a mechanical part. The abrasion testing device is characterized in that the abrasion testing device comprises a support and a right-angled pair-grinding part, wherein the inner surface of the pair-grinding part is matched with the boundary surface of an abrasion test piece in shape, the inner surface of the pair-grinding part is clung to the boundary surface of an abrasion test piece, baffle plates are fixedly arranged at two sides of the pair-grinding part for preventing the pair-grinding part from moving circumferentially, a vertical force application mechanism is arranged on the horizontal outer surface of the pair grinding part and is perpendicular to the pair-grinding part, a horizontal force application mechanism is arranged on the vertical outer surface of the pair-grinding part and is perpendicular to the pair-grinding part, and the axial center lines of the vertical force application mechanism and the horizontal force application mechanism are both positioned in the central plane of the pair-grinding part. The abrasion testing device has the advantages that the abrasion testing can be carried out on the boundary surface of the abrasion test piece, the abrasion condition of the edges of the boundary surface can be observed, and the device is beneficial to studying the abrasion condition of the boundary surface, particularly, the edges of the boundary surface of the mechanical part.

Description

A wear test device for the interface surface of mechanical parts

technical field

The invention relates to a wear test device of a mechanical part, in particular to a wear test device of an interface surface of a mechanical part.

Background technique

In the field of mechanical processing, many mechanical parts have interface surfaces (that is, two surfaces are connected and intersected and the angle is less than 180 degrees), such as cross-wedge rolling dies, ring rolling dies, extrusion dies, and some workpieces. The junction is the key area to realize its function, and it is also the most stressed and worn area, especially the edge where the two surfaces meet. At present, due to structural reasons, some common wear testing machines can only perform friction and wear experiments on a single surface, and are not suitable for wear experiments on interface surfaces, especially wear experiments on edges at the interface between surfaces.

Contents of the invention

The technical problem to be solved by the present invention is to provide a mechanical part interface that can carry out wear experiments on the two interface surfaces of mechanical parts at the same time, so as to help to study the wear conditions of the interface surfaces, especially the edges at the interface of the surfaces. Surface wear test device.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a wear test device for the interface of mechanical parts, including a bracket and a right-angled counter-abrasive part, the inner surface of the counter-abrasive part and the interface between the wear test piece The shape of the surface matches the shape, the inner surface of the abrasive part fits the interface surface of the wear test piece, and the two sides of the abrasive part are provided to prevent the abrasive part from A baffle plate moving in the circumferential direction, the baffle plate is fixedly connected with the support, and a vertical force applying mechanism perpendicular to the grinding piece is arranged on the horizontal outer surface of the grinding piece. A horizontal force applying mechanism perpendicular to it is arranged on the vertical outer surface, and the vertical force applying mechanism and the horizontal force applying mechanism are respectively fixedly connected with the support, and the vertical force applying mechanism The axial centerline and the axial centerline of the horizontal force application mechanism are all located in the center plane of the abrasive pair, and the structure of the vertical force application mechanism is the same as that of the horizontal force application mechanism. same.

The vertical force application mechanism includes an upper connector, a force sensor, a pressure plate, a force application bolt and a connecting frame, the connection frame is fixedly connected to the support, and the force application bolt passes downward through the The connecting frame is screwed with the connecting frame, the lower end of the force applying bolt is connected to the upper connecting piece in rotation and cannot move relative to the axial direction, and the upper connecting piece is connected to the connecting piece An anti-rotation mechanism is arranged between the frames, the upper connecting piece is fixedly connected with the force sensor, the pressure plate is pressed against the horizontal outer surface of the grinding part, and the force sensor is connected with the force sensor. A flexible assembly for protecting the force sensor from impact is arranged between the pressure plates.

The anti-rotation mechanism includes an anti-rotation screw, and the anti-rotation screw is radially screwed on the upper connector, and a vertical chute is provided on the connecting frame, and the anti-rotation screw Slidingly cooperate with the described chute up and down.

The flexible component includes a spring and a lower connecting piece, the lower connecting piece is fixedly connected to the force sensor, the upper end of the spring is fixedly connected to the lower connecting piece, and the lower end of the spring is connected to the lower connecting piece. The pressing plate is fixedly connected.

Compared with the prior art, the advantage of the present invention is that as long as the counter-abrasive piece is attached to the interface surface of the wear test piece, and the force is applied to the counter-abrasive piece through the vertical force applying mechanism and the horizontal force applying mechanism, the pair of abrasive pieces The abrasive piece is close to the two interface surfaces of the wear test piece, and then the wear test piece is driven to rotate, so that the wear test can be carried out on the interface surface of the wear test piece, and the wear condition of the interface edge of the shape surface can be observed, which is helpful Research on the wear of the interface of mechanical parts, especially the edge of the interface.

Description of drawings

Fig. 1 is the structural representation of the grinding part and the shaft shape wear test piece of the present invention;

Fig. 2 is the front side structure schematic diagram of the present invention;

Fig. 3 is the rear side structure schematic diagram of the present invention;

Fig. 4 is a schematic diagram of the structure of the present invention after removing the bracket, the connecting frame and the baffle.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

In this embodiment, a mechanical part in the shape of a shaft is used as a wear test piece, and its cylindrical surface and conical surface form an interface surface.

As shown in the figure, a wear test device for the interface surface of a mechanical part includes a bracket 1 and a right-angled counter-abrasive part 2, the inner surface of the counter-abrasive part 2 matches the shape of the interface part 31 of the wear test piece 3 , the inner surface of the grinding piece 2 fits the interface surface 31 of the wear test piece 3, and the two sides of the grinding piece 2 are provided with baffles 4 for preventing the grinding piece 2 from moving in the circumferential direction. The bracket 1 is fixedly connected, and the horizontal outer surface of the grinding piece 2 is provided with a vertical force applying mechanism 5 perpendicular to it, and the vertical outer surface of the grinding piece 2 is provided with a horizontal force applying mechanism 6 perpendicular to it. The straight force applying mechanism 5 and the horizontal force applying mechanism 6 are fixedly connected to the bracket 1 respectively, and the axial centerline of the vertical force applying mechanism 5 and the axial centerline of the horizontal force applying mechanism 6 are both located in the center plane of the abrasive part 2 , the structure of the vertical force applying mechanism 5 is identical to that of the horizontal force applying mechanism 6;

The vertical force applying mechanism comprises a force applying bolt 51, an upper connector 52, a force sensor 53, a lower connector 54, a spring 55, a pressing plate 56 and a connecting frame 57, and the connecting frame 57 is fixedly connected on the support 1, and the applying force bolt 51 The bottom passes through the connecting frame 57 and is screwed with the connecting frame 57. The lower end of the force applying bolt 51 is connected to the upper connecting piece 52 in rotation and cannot move relative to the axial direction. The upper connecting piece 52 is screwed with anti-rotation screws 58 radially. The connecting frame 57 is provided with a vertical chute 59, the anti-rotation screw 58 and the chute 59 slide up and down, the upper connector 52 is fixedly connected with the force sensor 53, the lower connector 54 is fixedly connected with the force sensor 53, and the spring 55 The upper end is fixedly connected with the lower connecting piece 54 , the lower end of the spring 55 is fixedly connected with the pressing plate 56 , and the pressing plate 56 is tightly pressed on the horizontal outer surface of the grinding part 2 .

Claims (3)

1. A wear experimental device of a mechanical part interface surface, comprising a support and a right-angled pair of grinding parts, the inner surface of the pair of grinding parts matches the shape of the interface shape of the wear test piece, and the described pair of grinding parts The inner surface of the grinding piece fits the interface surface of the wear test piece, and the two sides of the grinding piece are provided with baffles for preventing the circumferential movement of the grinding piece. The plate is fixedly connected with the support, the horizontal outer surface of the abrasive part is provided with a vertical force applying mechanism perpendicular to it, and the vertical outer surface of the abrasive part is provided with a vertical force mechanism perpendicular to it. Horizontal force application mechanism, the vertical force application mechanism and the horizontal force application mechanism are respectively fixedly connected to the support, the axial centerline of the vertical force application mechanism, the horizontal force application mechanism The axial centerlines of the mechanism are all located in the center plane of the grinding part, and the structure of the vertical force applying mechanism is the same as that of the horizontal force applying mechanism, and it is characterized in that the vertical force applying mechanism The force mechanism includes an upper connector, a force sensor, a pressure plate, a force applying bolt and a connecting frame, the connecting frame is fixedly connected to the bracket, and the described force applying bolt passes through the connecting frame downwards and is connected with the connecting frame. The connecting frame is screwed, the lower end of the force applying bolt is rotatably connected with the upper connecting piece and cannot move relative to the axial direction, and an anti-locking device is arranged between the upper connecting piece and the connecting frame. The upper connecting piece is fixedly connected with the force sensor, the pressure plate is pressed tightly on the horizontal outer surface of the grinding part, and the force sensor and the pressure plate are arranged There is a flexible assembly for protecting the force sensor from impact. 2. A wear test device for the interface surface of a mechanical part as claimed in claim 1, wherein said anti-rotation mechanism comprises an anti-rotation screw, and said anti-rotation screw is radially screwed on said upper On the connector, the connecting frame is provided with a vertical chute, and the anti-rotation screw slides up and down with the chute. 3. The wear test device of a mechanical part interface surface as claimed in claim 1, wherein said flexible assembly comprises a spring and a lower connector, and said lower connector is fixedly connected to said force sensor , the upper end of the spring is fixedly connected to the lower connector, and the lower end of the spring is fixedly connected to the pressure plate.