CN112255119A

CN112255119A - Dynamic compression-shear testing machine

Info

Publication number: CN112255119A
Application number: CN202011241821.6A
Authority: CN
Inventors: 周同; 蔡青松; 彭金海; 朱瑞
Original assignee: Shanghai Hualong Test Instruments Co ltd
Current assignee: Shanghai Hualong Test Instruments Co ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-01-22

Abstract

The invention discloses a dynamic compression shear testing machine which comprises a sensor, wherein the sensor is connected with a sensor connecting plate through screws, the other surface of the sensor is connected with a piston of a vertical oil cylinder through screws, the coaxiality of the sensor, the vertical oil cylinder, the sensor connecting plate and an upper pressure plate is realized through a positioning block, the vertical oil cylinder is fixed on a cross beam, the cross beam is connected with an upright column to form an integral structure, a side sliding plate is installed on the upright column, a roller of a rolling guide rail block is arranged on the side sliding plate in a sliding mode, an installation hole of a guide rail block support is a long groove hole, an inclined cushion block is installed on the upper pressure plate through screws, and the inclined plane of the inclined cushion block is superposed with the inclined plane. According to the invention, the influence caused by horizontal shearing force is effectively overcome, the movement in the horizontal direction is reduced, the accuracy of data in the vertical direction is ensured, and the vertical direction moves by adopting roller contact, so that the friction loss is reduced, and the working efficiency is improved.

Description

Dynamic compression-shear testing machine

Technical Field

The invention relates to the technical field of dynamic compression and shear testing machines, in particular to a dynamic compression and shear testing machine.

Background

The top board mounting means of present domestic most testing machine roughly divide into two kinds:

the oil cylinder is used for controlling the upper pressure plate to move up and down. The upper pressing plate is connected with the load sensor, the load sensor is fixed on the piston of the oil cylinder, and the upper pressing plate is driven to move by the movement of the piston of the oil cylinder.

The upper pressure plate is controlled by a lead screw to move up and down. The motor drives the lead screw rotatory, the lead screw rotation can be changed into and reciprocate, several problems will be overcome to this kind of mounting means, first, do the process that the top board received pressure when up had one section unchangeable value of force, this process is because clearance between the lead screw arouses, second, the top board position is on the high side to lead to the upside lead screw to be too big apart from lead screw atress driven position in vertical direction, when the motor indirectly drives the top board, the meeting that rocks on the lead screw is more violent, lead to this assumption of motor control top board position to have the error, unable accurate realization is to the location of top board.

Disclosure of Invention

The invention aims to provide a dynamic compression-shear testing machine to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the dynamic compression shear testing machine comprises a sensor, wherein the sensor is connected with a sensor connecting plate through screws, the other side of the sensor is connected with a piston of a vertical oil cylinder through screws, the coaxiality of the sensor, the vertical oil cylinder, the sensor connecting plate and an upper pressure plate is realized through a positioning block, the vertical oil cylinder is fixed on a cross beam, the cross beam is connected with an upright post to form an integral structure, a side sliding plate is installed on the upright post, a roller of a rolling guide rail block is arranged on the side sliding plate in a sliding manner, a lower pressure plate is fixed on a dynamic shear plate, the dynamic shear plate is connected with a horizontal oil cylinder, the horizontal oil cylinder is fixed on a horizontal oil cylinder base, the horizontal oil cylinder base and the upright post are connected together through 2 reaction frames, the upright post is fixed on the base, the upper pressure plate guiding device is further connected with the sensor connecting plate, the upper pressing plate guide device comprises a guide rail block base plate, the guide rail block base plate is arranged on an upper pressing plate, a rolling guide rail block is arranged on the guide rail block base plate, a guide rail block support is arranged on the upper pressing plate, the rolling guide rail block is arranged on the guide rail block support through a screw, a mounting hole of the guide rail block support is a long slotted hole, an inclined cushion block is arranged on the upper pressing plate through a screw, the inclined plane of the inclined cushion block coincides with the inclined plane of the guide rail block support, the distance between the guide rail block support is adjusted through the tightness degree of the screw on the inclined cushion block, and then a large base plate is inserted into the gap between the guide rail block support and the.

Preferably, the guide rail block base plate and the upper pressure plate are mounted in a manner that the guide rail block base plate is connected with the upper pressure plate through a screw.

Preferably, the guide rail block support is mounted on the upper pressure plate in a manner that the guide rail block support is connected with the upper pressure plate through a screw.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the influence caused by horizontal shearing force is effectively overcome, the movement in the horizontal direction is reduced, the accuracy of data in the vertical direction is ensured, and the vertical direction moves by adopting roller contact, so that the friction loss is reduced, and the working efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of a dynamic compression-shear testing machine according to the present invention;

FIG. 2 is a schematic view of the upper platen guide of the present invention;

FIG. 3 is a side view of the dynamic compression shear tester of the present invention.

In the figure: 101-upper press plate, 102-guide rail block base plate, 103-rolling guide rail block, 104-guide rail block support, 105-inclined cushion block, 106-screw, 107-large base plate, 201-upper press plate guide device, 202-side slide plate, 203-sensor connecting plate, 204-positioning block, 205-sensor, 206-vertical oil cylinder, 207-upright post, 208-cross beam, 209-sample, 210-lower press plate, 211-dynamic shear plate, 212-horizontal oil cylinder, 213-base, 214-horizontal oil cylinder base and 215-reaction frame.

Detailed Description

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.

Referring to fig. 1 and 3, in the dynamic compression shear testing machine, an upper pressure plate guide 201 is connected with a sensor connecting plate 203 through a screw 106, a sensor 205 is connected with the sensor connecting plate 203 through the screw 106, and the other side of the sensor 205 is connected to a piston of a vertical oil cylinder 206 through the screw 106. The coaxiality of the sensors 205, the vertical oil cylinders 206, the sensor connecting plates 203 and the upper pressure plate 101 is ensured by the positioning blocks 204, the number of the positioning blocks 204 is three, the oil cylinders 206 are fixed on the cross beams 208, the cross beams 208 are connected with the upright columns 207, and the number of the upright columns 207 is two, so that an integral structure is formed.

The upright column 207 is provided with the side sliding plate 202, the up-down movement of the upper pressure plate 101 is realized by rolling on the side sliding plate 202 by means of the roller of the rolling guide block 103 in the test process, the tightness degree of the inclined cushion block 105 is adjusted, and the large cushion plate 107 is inserted to ensure that no gap exists between the rolling guide block 103 and the side sliding plate 202, and the movement of the upper pressure plate 101 in the horizontal direction is also avoided.

The lower pressure plate 210 is fixed on the dynamic shear plate 211, and the dynamic shear plate 211 is connected with the horizontal cylinder 212.

During testing, the sample 209 is fixed on the lower press plate 210, the vertical oil cylinder 206 piston presses the upper press plate 201 down on the sample 209 tightly, the horizontal oil cylinder 212 applies reciprocating horizontal force, the horizontal shearing force can be transmitted to the upper press plate 101 through the sample 209, but the upper press plate guide device 202 transfers the horizontal shearing force to the whole dynamic testing machine frame completely, so that the sensor 202 is guaranteed to be only stressed by the force in the vertical direction, and the accuracy of test data is guaranteed.

The upper press plate 101 is fixed by the upright column 207 in the horizontal direction, and the upper press plate 101 and the upright column 207 are in surface contact, so that the contact area is increased and the pressure is reduced on the premise of ensuring stability.

When the upper pressure plate 101 moves up and down, the rolling guide block 103 is adopted between the contact surfaces of the upper pressure plate 101 and the upright post 207, so that the loss caused by friction is effectively reduced. Because the damage to the material caused by the relative movement between the surfaces is large, and after the relative movement is long, the verticality is difficult to ensure, and the accuracy of test data is influenced. By adopting the rolling guide rail block 103, the surface contact is changed into rolling contact, and the friction force generated by the vertical movement is effectively reduced.

During the test, the upper press plate guide device 201, the upright column 207, the cross beam 208 and the base form a whole, so that the influence of the horizontal shearing force on the sensor 205 in the test process of the upper press plate guide device 201 is effectively eliminated, and the accuracy of data is ensured.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a dynamic compression shear testing machine, includes sensor (205), sensor (205) are connected with sensor connecting plate (203) through screw (106), the another side of sensor (205) passes through screw (106) and connects on the piston of vertical hydro-cylinder (206), the axiality of sensor (205), vertical hydro-cylinder (206), sensor connecting plate (203) and top board (101) is realized through locating piece (204), vertical hydro-cylinder (206) are fixed again on crossbeam (208), crossbeam (208) are connected with stand (207) and are formed an overall structure, install side slide board (202) on stand (207), the slip is provided with the gyro wheel of roll guide piece (103) on the side slide board, and holding down plate (210) are fixed on dynamic shear plate (211), and dynamic shear plate (211) are connected with horizontal hydro-cylinder (212), horizontal hydro-cylinder (212) are fixed on horizontal hydro-cylinder base (214), horizontal cylinder base (214) and stand (207) link together through 2 reaction frame (215) between, stand (207) are fixed again on base (213), make whole testing machine form a whole, its characterized in that: the device is characterized by further comprising an upper pressing plate guide device (201), the upper pressing plate guide device (201) is connected with the sensor connecting plate (203) through a screw (106), the upper pressing plate guide device (201) comprises a guide rail block base plate (102), the guide rail block base plate (102) is installed on the upper pressing plate (101), a rolling guide rail block (103) is installed on the guide rail block base plate (102), a guide rail block support (104) is installed on the upper pressing plate (101), the rolling guide rail block (103) is installed on the guide rail block support (104) through the screw (106), an installation hole of the guide rail block support (104) is a long slotted hole, an inclined cushion block (105) is installed on the upper pressing plate (101) through the screw (106), the inclined plane of the inclined cushion block (105) is overlapped with the inclined plane of the guide rail block support (104), and the distance between the guide rail block supports (104) is adjusted through the tightness degree of the screw (106) on the inclined cushion block, then a large backing plate (107) is inserted into the gap between the guide rail block bracket (104) and the upper pressure plate (101).

2. The dynamic compression shear tester of claim 1, wherein: the guide rail block base plate (102) and the upper pressure plate (101) are installed in a mode that the guide rail block base plate (102) is connected with the upper pressure plate (101) through a screw (106).

3. The dynamic compression shear tester of claim 1, wherein: the guide rail block support (104) is arranged on the upper pressure plate (101) in a mode that the guide rail block support (104) is connected with the upper pressure plate (101) through a screw.