CN102688903A - Tester for correcting and compensating rolling pressure of steel rolling machine - Google Patents

Abstract

The invention relates to a rolling pressure test device for correcting and compensating a rolling mill. Four force-measuring rods are respectively installed on both sides of a trapezoidal roll bearing seat through threaded holes, and the trapezoidal roll bearing seat and the auxiliary block of the bearing seat are connected to form a unit through the force-measuring rods. On the whole, a spherical elastic block and a force sensor are arranged between the head of the force measuring rod and the upper end surface of the trapezoidal roll chock, and the force sensor is in contact with the upper end surface of the trapezoidal roll chock. The present invention adopts the composite bearing seat which combines the trapezoidal roll bearing seat and the auxiliary block of the bearing seat. The force measuring rod, the spherical elastic block and the force measuring sensor are installed on the bearing seat, and the static friction and sliding produced between the trapezoidal rolling bearing seat and the machine frame are used. The trend of friction is used to test the additional resistance generated between the trapezoidal roll chock and the frame, and the test value of rolling pressure is corrected and compensated, which can greatly improve the test accuracy. In addition, the arrangement of the four load cells can effectively prevent the test error caused by the uneven distribution of the friction force between the two tests of the bearing seat.

Description

Correction and Compensation Rolling Mill Rolling Pressure Test Device

technical field

The invention relates to a pressure testing device, in particular to a testing device for rolling pressure correction and compensation of a rolling mill.

Background technique

As one of the most important technical parameters of rolling mills, rolling force is an important parameter to ensure the normal operation of equipment and product quality. It is of great practical significance to determine the rolling force accurately, formulate the rolling schedule reasonably, maximize the potential of the rolling mill, and improve product quality and output. Theoretically speaking, the rolling force is not only related to the mechanical properties of the rolled metal during plastic deformation, but also related to the complex production process and various mechanical conditions; so theoretically, when the analytical method is used to determine the rolling force , not only have to consider various complex related factors, but also the calculation results are often quite different from the actual ones. Therefore, in the actual production at home and abroad, the most reliable and accurate method to determine the rolling force is to obtain it directly through field tests.                     

Usually, the force that the rolling piece acts on the roll and is transmitted to the frame by pressing down the screw is called the rolling force, which is the vertical component of the reaction force of the rolling piece on the roll. In the traditional rolling force test, only the vertical component is paid attention to and the additional influence caused by the horizontal component on the vertical component is ignored. Due to the existence of static friction between the bearing seat and the frame, and under the action of the horizontal component of the rolling force, there is a certain force between the roll bearing seat and the frame. When the difference in rigidity is large, it can be considered that under the action of the rolling force, all the deformations of the pressing system and bearing housings, bearings, etc. are generated in the pressing system, and at this time, a relative displacement ΔL is generated between the rolling bearing housing and the frame The trend of , see Figure 1, is the trend of sliding friction, and the friction force is formed by the force and friction coefficient between the two. The worse the quality, wear, installation and lubrication conditions of the machined surface between the roll chock and the frame, the greater the friction, and even the phenomenon of unequal friction between the two measurements of the roll chock. P _Y is the vertical component force of the rolling pressure, that is, the rolling force, P _X is the horizontal component force of the rolling pressure, P _Y1 is the vertical support reaction force of the bearing seat, P _X1 is the horizontal support reaction force of the bearing seat, P _F1 And P _F2 is the friction force caused by P _X and static friction between the roll chock and the frame. So according to the principle of mechanics:

P _Y = P _Y1 + P _F1 + P _F2

Its existence will have a greater impact on the test of the rolling force, especially when the rolling force test is carried out by using the sensor method installed between the screw rod and the bearing seat and the sensor method installed at the nut.

Contents of the invention

The present invention is to provide a rolling pressure test device for correcting and compensating a rolling mill. The device passes through the structure of the roll bearing housing and the force-measuring pull rod arranged therebetween, and utilizes the static friction and sliding friction generated between the rolling bearing housing and the rack. The tendency to test the additional resistance generated between the roll chock and the frame, and to correct and compensate the test value of the rolling pressure, the structure is simple, reliable, does not affect the strength and stiffness of the roll chock, and has an ideal correction Effect of rolling stress test with compensation.

The technical solution of the present invention is: a rolling pressure test device for correcting and compensating a rolling mill, including a trapezoidal roll bearing seat, a force measuring rod, a spherical elastic block, a load cell, and an auxiliary block for the bearing seat, and is characterized in that: a trapezoidal roll bearing Four force measuring rods are installed on both sides of the seat respectively through threaded holes, and the trapezoidal roll bearing seat and the auxiliary block of the bearing seat are connected as a whole through force measuring rods, and a spherical surface is arranged between the head of the force measuring rod and the upper end surface of the trapezoidal roll bearing seat An elastic block and a force sensor are provided, and the force sensor is in contact with the upper end surface of the trapezoidal roll chock.

The lower end of the force measuring rod is provided with threads, and the upper end is provided with a spherical head, which is in contact with the spherical elastic block. the

A groove is opened in the middle of the spherical elastic block, and the lower plane of the spherical elastic block is in contact with the load cell.

The auxiliary block of the chock has a triangular structure, and the slope of the hypotenuse of the triangle is the same as the slope of the trapezoidal hypotenuse corresponding to the trapezoidal roll chock.

The trapezoidal roll bearing housing is a split bearing housing or an integral bearing housing. the

The beneficial effects of the present invention are:

The present invention adopts the composite bearing seat which combines the trapezoidal roll bearing seat and the bearing seat auxiliary block. The force measuring rod, the spherical elastic block and the force measuring sensor are installed on the composite bearing seat to utilize the static friction and sliding produced between the trapezoidal rolling bearing seat and the machine frame. The trend of friction is used to test the additional resistance generated between the trapezoidal roll chock and the frame, and the test value of rolling pressure is corrected and compensated, which can greatly improve the test accuracy. In addition, the spherical elastic block can adjust the center and relax. The arrangement of the four load cells can effectively prevent the test error caused by the uneven distribution of the friction force between the two tests of the bearing seat.

The invention has a simple and reliable structure, does not affect the strength and rigidity of the roll bearing seat, and has an ideal effect of correcting and compensating the rolling pressure test. It can be used for split bearing housings or integral bearing housings.

Description of drawings

Figure 1 is a force diagram of a roll bearing seat;

Figure 2 is a schematic structural diagram of a test device using a split bearing housing;

Figure 3 is a structural front view of the split bearing housing;

Fig. 4 is the left view of Fig. 3;

Figure 5 is a schematic diagram of the force measuring rod;

Fig. 6 is a structural sectional view of a spherical elastic block;

Fig. 7 is a front view of the auxiliary block structure of the split bearing housing;

Fig. 8 is a left view of Fig. 7;

Fig. 9 is a schematic structural diagram of a test device using an integral bearing seat;

Figure 10 is a structural front view of the integral bearing housing;

Fig. 11 is the left view of Fig. 10;

Fig. 12 is a front view of the auxiliary block structure of the integral bearing housing;

Fig. 13 is a left side view of Fig. 12 .

Detailed ways

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

As shown in Figures 2 to 13, the rolling pressure testing device for the correction and compensation rolling mill of the present invention includes a trapezoidal roll bearing housing 1, a force measuring rod 2, a spherical elastic block 3, a load cell 4, and an auxiliary bearing block 5 wait.

As shown in Figures 2 and 9, four force measuring rods are respectively installed on both sides of the trapezoidal roll bearing housing 1 through threaded holes, and the trapezoidal rolling bearing housing and the auxiliary block of the bearing housing are connected as a whole through the force measuring rods. A spherical elastic block 3 and a load cell 4 are arranged between the upper end surface of the trapezoidal roll chock 1 and the upper end face, and the load cell 4 is in contact with the upper end face of the trapezoidal roll chock 1 .

As shown in 3 and 4, the trapezoidal roll bearing housing 1 is a split bearing housing, with a trapezoidal hypotenuse on both sides of the split bearing housing, and two threaded holes on the protruding upper plane.

As shown in Figure 5, the lower end of the force measuring rod 2 is provided with threads, and the upper end is provided with a spherical head, which is in contact with the spherical elastic block. the

As shown in FIG. 6 , a groove is opened in the middle of the spherical elastic block 3 , and the lower plane of the spherical elastic block is in contact with the load cell 4 .

As shown in Figures 10 and 11, the trapezoidal roll chock 1 is an integral chock with a trapezoidal hypotenuse on both sides of the integral chock and two threaded holes on the protruding upper plane.

As shown in Figures 7, 8, 12 and 13, the auxiliary block 5 of the chock has a triangular structure, and the slope of the hypotenuse of the triangle is the same as that of the trapezoidal hypotenuse corresponding to the trapezoidal roll chock 1 . the

The effect of each parts of the present invention:

(1) Trapezoidal roll chock 1: supporting the roll bearing and bearing and transmitting the rolling pressure. Along the vertical direction of the rolling pressure, it has a trapezoidal structure with a large top and a small bottom. A smooth mating surface is used at the fitting with the auxiliary block of the housing to reduce frictional resistance. Under the action of rolling pressure, the bearing seat and the auxiliary block of the bearing seat can form a tendency of relative movement along the direction of rolling pressure, and the relative movement along the direction of reverse rolling pressure is due to the convex structure of the bearing seat and the auxiliary block of the bearing seat. And blocked. And when pressing down mechanism work, because bearing seat and the lug structure of bearing seat auxiliary block bottom move synchronously. Under the action of the horizontal component force P _X of the rolling pressure, the bearing seat gives a thrust to the auxiliary block of the bearing seat, and the auxiliary block of the bearing seat gives a reaction force to the bearing seat, and an upward thrust will be generated due to the contact of its inclined surface , but the thrust produced is extremely small due to the small slope of the slope. Much smaller than the vertical component of rolling pressure. There are two round through holes on both sides of the bearing seat for installing a total of four force measuring rods.

(2) Auxiliary block 5 of the chock: Triangular structure, the slope of the hypotenuse of the triangle is the same as the slope of the trapezoidal hypotenuse corresponding to the trapezoidal roll chock 1. A smooth mating surface is used at the mating place with the bearing housing to reduce frictional resistance. Under the action of the rolling pressure, the trapezoidal roll chock 1 and the auxiliary block 5 of the chock can form a tendency of relative movement along the rolling pressure direction, and the relative movement along the reverse rolling pressure direction is blocked. Both sides of the trapezoidal roll chock are respectively provided with two threaded holes for installing a total of four force measuring rods 2 , and the trapezoidal roll chock 1 and the auxiliary block 5 of the bearing seat are connected as a whole through the force measuring rods 2 . Its vertical face touches the side of the rack.

(3) Force measuring rod 2: a circular rod, one end is threaded and the other end is a spherical structure. It is used to connect the trapezoidal roll chock 1 and the auxiliary block 5 of the chock. The spherical head is in contact with the spherical elastic block 3, and together with the spherical elastic block 3, it plays the role of self-aligning, ensuring that the force measuring rod 2 is always in a unidirectional stretching state.

(4) Load cell 4: It is used to test the friction force P _F formed between the frame and the auxiliary block 5 of the bearing seat under the action of rolling force P _X and static friction and other factors. Because under the action of rolling force P _X , the rolling mill frame will be subjected to a horizontal force, and under the action of rolling force P _Y , the bearing seat will have a tendency to move in the direction of P _Y , so the distance between the frame and the bearing seat There will be a friction force P _F . The friction force P _F is equal to the product of the force P _X and the friction coefficient μ, that is:

P _F =P _X ×μ

Under the interaction between the rolling force P _Y and the friction force P _F , due to the special structure of the trapezoidal roll chock shaft 1 and the chock auxiliary block 5, the trapezoidal roll chock 1 and the chock auxiliary block 5 produce a relative displacement, making the measurement The force rod 2 receives force and transmits it to the load cell 4 through the spherical elastic block 3 . The load cell 4 is thus able to detect additional influencing forces due to friction. The arrangement of the four load cells 4 can effectively prevent the test error caused by the uneven distribution of the friction force between the trapezoidal roll chocks 1 . Its test value can be used to compensate and correct the test value of rolling force. Combining the trapezoidal roll chock 1 , the chock auxiliary block 5 , the spherical elastic block 3 and the load cell 4 through the load cell 2 for system calibration can greatly improve the test accuracy.

Spherical elastic block 3: installed on the spherical structure part of the force measuring rod 2, together with the spherical structure part of the force measuring rod 2, it plays the role of self-aligning, ensuring that the force measuring rod 2 is always in a unidirectional stretching state. A groove is processed at the middle position of the height of the spherical elastic block 3, so that it can be elastically compressed when it is tightened by the screw thread of the force measuring rod, and can also play a role in relaxing elastic washers during use. The lower plane of the spherical elastic block 3 is in contact with the load cell 4 .

Claims (5)

1. A rolling pressure test device for correcting and compensating a rolling mill, including a trapezoidal roll bearing seat (1), a force measuring rod (2), a spherical elastic block (3), a force sensor (4), and an auxiliary block for the bearing seat ( 5), which is characterized in that four force measuring rods (2) are installed on both sides of the trapezoidal roll bearing seat (1) respectively through threaded holes, and the trapezoidal roll bearing seat (1) and the bearing seat auxiliary block (5) pass through The force measuring rod (2) is connected as a whole, and a spherical elastic block (3) and a force sensor (4) are arranged between the head of the force measuring rod (2) and the upper end surface of the trapezoidal roll bearing seat (1), and the force measuring The sensor (4) is in contact with the upper end surface of the trapezoidal roll chock (1). 2. The rolling pressure test device for correcting and compensating a rolling mill according to claim 1, characterized in that: the lower end of the force measuring rod (2) is provided with a thread, and the upper end is provided with a spherical head, and the spherical head is connected with the spherical elastic force block (3) contacts. 3. The rolling pressure test device for correcting and compensating a rolling mill according to claim 1, characterized in that: a groove is opened in the middle of the spherical elastic block (3), and the lower plane of the spherical elastic block (3) is connected to the force sensor (4) CONTACT. 4. The rolling pressure test device for correcting and compensating a rolling mill according to claim 1, characterized in that: the auxiliary bearing block (5) is in a triangular structure, and the slope of the hypotenuse of the triangle is the same as that of the trapezoidal rolling bearing housing (1 ) corresponding to the trapezoid with the same slope. 5. The rolling pressure test device for correcting and compensating a rolling mill according to claim 1, characterized in that: the trapezoidal roll bearing housing (1) is a split bearing housing or an integral bearing housing.

Images