A kind of clamp, clamping device and hydraulic system for continuous annealing unit welding machine

Abstract

The application discloses a clamp for a continuous annealing unit welding machine, a clamping device and a hydraulic system, and belongs to the technical field of strip steel processing equipment. The clamp for the continuous annealing unit welding machine comprises a main body part, has a circular clamping surface in contact with a strip steel surface, a convex part integrally formed with the main body part and provided with a circular connecting surface, and a cylindrical through hole. Through the design of the circular clamping surface in the clamp, the contact area with the strip steel surface can be increased, the stability during clamping can be improved, the slipping phenomenon of the clamp and the strip steel surface can be avoided, the safety of the production line is improved, and the quality of the welding seam is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of strip steel processing equipment, and particularly relates to a clamp for a continuous annealing unit welding machine, a clamping device and a hydraulic system. BACKGROUND

[0002] The continuous annealing unit welding machine is mainly used for annealing process treatment of a strip steel to improve the internal crystal structure of the strip steel and improve the process performance and mechanical performance of the strip steel.

[0003] When the strip steel is processed at the welding position of the continuous annealing unit, the surface of the strip steel is attached with residual oil film of a rolling machine emulsion, and the friction coefficient of the surface of the strip steel is very small after the rolling machine adopts a light roll mode. The existing strip steel clamping clamp is made of polyurethane plate, and the strip steel is often slippery when clamped, which easily causes the strip steel before and after the weld to be not in the center line direction. When the strip steel establishes tension during the operation of the unit, the tension of the edge of the weld is large, and the weld is cracked or directly broken. SUMMARY

[0004] The purpose of the present application is to provide a name to solve the problems of the existing welding clamp in use.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a clamp for a continuous annealing unit welding machine, the clamp material includes copper, and the clamp comprises:

[0006] A main body part has a circular clamping surface in contact with the surface of the strip steel;

[0007] A protruding part is integrally formed with the main body part and has a circular connecting surface;

[0008] A cylindrical through hole is provided along the axis of the clamp and forms a circular notch at the position of the circular clamping surface.

[0009] Preferably, the main body part is a cylinder, and the ratio of the diameter of the circular clamping surface to the thickness of the main body part is between 7:1 and 9:1.

[0010] Preferably, the ratio of the diameter of the circular notch to the diameter of the circular clamping surface is between 0.25:1 and 0.35:1.

[0011] Preferably, the protruding part is a cylinder, and the ratio of the diameter of the circular connecting surface to the thickness of the protruding part is between 11:1 and 13:1, and the ratio of the diameter of the circular connecting surface to the diameter of the circular clamping surface is between 0.7:1 and 0.8:1.

[0012] Preferably, the clamp further comprises a plurality of circumferentially arranged stepped through holes.

[0013] The application also discloses a clamping device for a continuous annealing unit welding machine, which comprises a support seat, a " " shaped clamping interval is formed in the support seat, and the clamping interval is symmetrically provided with the clamp as claimed in any one of claims 1-4.

[0014] The clamping assembly comprises a support seat, a " " shaped clamping interval is formed in the support seat, and the clamping interval is symmetrically provided with the clamp as claimed in any one of claims 1-4.

[0015] Preferably, the clamp device further comprises an adjusting assembly, the adjusting assembly comprises a first adjusting member and a second adjusting member, the first adjusting member is provided with a first adjusting hole, the second adjusting member is provided with a second adjusting hole, and the first adjusting hole and the second adjusting hole are coaxial.

[0016] The first sensor and the second sensor are arranged at intervals in the first direction, and the horizontal offset of the strip steel at the position is obtained according to the distance difference between the first sensor and the second sensor.

[0017] The correction assembly is installed on the support seat, the correction assembly comprises a moving member and a screw mechanism for driving the moving member to move in the first direction, and the moving member can be adsorbed on the strip steel to drive the strip steel to move.

[0018] Preferably, the first sensor and the second sensor are both laser sensors.

[0019] The application also discloses a hydraulic system for controlling the movement of the clamp as claimed in any one of claims 1-4, the system comprises a power unit, an output unit and a control unit.

[0020] The power unit comprises a pump body and a second reversing valve.

[0021] The output unit comprises a hydraulic cylinder and a first reversing valve, the A1 port of the first reversing valve is communicated with the first cavity of the hydraulic cylinder through a first output oil path, the B1 port of the first reversing valve is communicated with the second cavity of the hydraulic cylinder through a second output oil path, the P1 port of the first reversing valve is communicated with the oil outlet of the power unit through an oil inlet pipeline, and a proportional pressure reducing valve is arranged on the oil inlet pipeline.

[0022] Preferably, a one-way valve is arranged on each of the first output oil path and the second output oil path.

[0023] Compared with the prior art, the application has the following beneficial effects:

[0024] The original polyurethane plate clamp of the clamp made of copper material is provided, the contact area with the surface of the strip steel can be increased through the design of the circular clamping surface in the clamp, the stability during clamping can be improved, the slipping phenomenon of the clamp and the surface of the strip steel can be avoided, the safety of the production line is improved, and the quality of the welding seam is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a schematic view of a strip steel conveying structure according to the application;

[0026] Figure 2Side view of the clamping device of the present application;

[0027] Figure 3 Sectional view and plan view of the clamp of the present application;

[0028] Figure 4 Dimensional view of the clamp of the present application;

[0029] Figure 5 Schematic view of the strip floating;

[0030] Figure 6 Schematic view of the output unit in the present application;

[0031] Figure 7 Schematic view of the power unit in the present application.

[0032] In the figure: 100, holding assembly; 101, bracket assembly; 102, horizontal section; 200, clamping device; 201, support seat; 202, clamping section; 203, first sensor; 204, second sensor; 205, moving piece; 206, screw mechanism; 207, motor; 208, encoder; 209, screw; 300, clamp; 301, upper clamp piece; 302, lower clamp piece; 303, main body; 303a, clamping surface; 304, protruding part; 304a, connecting surface; 305, cylindrical through hole; 305a, circular notch; 306, stepped through hole; 306a, large diameter section; 306b, small diameter section; 400, output unit; 401, hydraulic cylinder; 402, first cavity; 403, second cavity; 404, piston rod; 405, first output oil line; 406, second output oil line; 407, oil inlet line; 408, one-way valve; 409, first one-way throttle valve; 410, proportional pressure reducing valve; 411, first reversing valve; 500, power unit; 501, pump body; 502, second reversing valve; 503, first oil outlet line; 504, second oil outlet line; 505, oil return line; 506, second one-way throttle valve; 507, third reversing valve. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0034] Reference Figure 1This is a partial schematic diagram of the strip steel conveying process. Arrow A in the diagram indicates the conveying direction of the strip steel. A welding machine (not shown) is set at the connection position of the two strip steels to connect their ends. In conjunction with the welding machine, holding components 100 are provided at the inlet and outlet positions of the strip steel to adjust the position of the two strip steels to be connected and maintain the stability of the strip steel after the position adjustment. Specifically, the holding components 100 include a support component 101 for keeping the strip steel horizontal and a clamping device 200 for horizontal correction and maintaining the stability of the strip steel. The support component 101 is set along the conveying direction of the strip steel and forms a horizontal section 102 for the strip steel. Multiple clamping devices 200 are distributed at intervals within the horizontal section 102. After the strip steel is conveyed into the horizontal section 102, it is set horizontally and is horizontally corrected by the clamping devices 200 to maintain the stability of the strip steel during the welding process.

[0035] Reference Figure 2 The image shows a side view of the clamping device 200, which includes an adjusting assembly and a clamping assembly. The adjusting assembly corrects the horizontal tilt of the strip steel to ensure that the ends of the two strip steels are welded in a parallel state. The clamping assembly clamps the strip steel after the position correction is completed to maintain its stability during welding. Specifically, the clamping assembly includes a support base 201, which is approximately a "U"-shaped component, forming a clamping area 202 within the support base 201. The strip steel can enter the clamping area 202 and be clamped by components disposed in the clamping area 202. Furthermore, the clamping assembly also includes a clamping clamp assembly disposed within the clamping area 202, comprising clamps symmetrically arranged within the clamping clamp assembly. The upper clamp 301 and lower clamp 302 on the upper and lower sides of the holding interval 202 can clamp and release the strip steel by controlling the movement of the upper clamp 301 and lower clamp 302. For example, the clamping action is described as follows: at this time, the upper clamp 301 moves linearly downward and the lower clamp 302 moves linearly upward. That is, the upper clamp 301 and lower clamp 302 move towards each other to clamp the strip steel located between the upper clamp 301 and lower clamp 302. Since the upper clamp 301 and lower clamp 302 have the same shape and specifications, they will be referred to as the upper clamp 301 and lower clamp 302 in the following text. That is, the clamp 300 in the following description can refer to either the upper clamp 301 or the lower clamp 302.

[0036] Back Figure 2 Continuing with the description of the adjustment component, this component includes a ranging component and a correction component. The ranging component includes two ranging sensors, which can be common ranging sensors such as laser or acoustic sensors. These two ranging sensors are referred to as the first sensor 203 and the second sensor 204. The two ranging sensors are positioned in the first direction (i.e.,...)Figure 1 The first sensor 203 and the second sensor 204 are spaced apart in the first direction (i.e. the direction perpendicular to the conveying direction of the strip steel), and the spacing between the first sensor 203 and the second sensor 204 in the first direction is denoted as X1, and the distances between the first sensor 203 and the second sensor 204 and the side edges of the strip steel are denoted as X2 and X3 respectively (assuming that X2 is greater than X3), at this time, the difference Xa between X2 and X3 is X2-X3, by comparing Xa with X1, the horizontal offset of the strip steel can be obtained and the correction assembly is controlled to act to correct the strip steel, specifically, the correction assembly includes a moving piece 205 and a lead screw mechanism 206 for driving the moving piece 205 to move linearly in the first direction, the moving piece 205 is fixedly connected with the nut of the lead screw mechanism 206 and moves with the nut, on the other hand, the moving piece 205 has magnetism and can attract the strip steel to drive the strip steel to move horizontally to correct the strip steel, and the moving distance of the moving piece 205, i.e. the correction amount of the strip steel, can be realized by the cooperation of the motor 207 and the encoder 208 in the lead screw mechanism 206.

[0037] The main material of the clamp 300 is copper, in some embodiments of the clamp 300, red copper is selected as the main material of the clamp 300, referring to Figure 3 , Figure 3Fig. 3 is a sectional view and a plan view of the clamp 300, which are combined to further illustrate the clamp 300. As shown in the figure, the clamp 300 is a rotary body part formed by rotating around the axis B. Specifically, the clamp 300 includes a cylindrical main body part 303 and a protruding part 304. The main body part 303 has a circular clamping surface 303a directly contacting the surface of the strip steel. The diameter of the clamping surface 303a is denoted as φ1. The ratio of the diameter (φ1) of the clamping surface 303a to the thickness (H1) of the main body part 303 is between 7:1 and 9:1. In the preferred embodiment of the clamp 300, the ratio of R1 to H1 is 8:1. The protruding part 304 is integrally formed with the main body part 303. The protruding part 304 has a circular connecting surface 304a. The diameter of the connecting surface 304a is denoted as φ2. The ratio of the diameter (φ2) of the connecting surface 304a to the thickness (H2) of the protruding part 304 is between 11:1 and 13:1. The ratio of the diameter (φ2) of the connecting surface 304a to the diameter (φ1) of the clamping surface 303a is between 0.7:1 and 0.8:1. In the preferred embodiment of the protruding part 304, the ratio of φ2 to H2 is 12:1, and the ratio of φ2 to φ1 is 0.75:1. By designing the clamp with the circular clamping surface 303a and limiting the diameter of the clamping surface 303a and the thickness of the clamp 300, the contact area between the clamp 300 and the strip steel can be increased, and the clamping force can be increased, thereby improving the stability of the clamp 300 when clamping the strip steel. In combination with the selection of red copper as the main material of the upper clamping part, the friction between the clamp 300 and the strip steel can be increased, thereby further improving the stability of the clamp 300 when clamping the strip steel.

[0038] Further, the clamp 300 is provided with a cylindrical through hole 305 extending along the axis B. That is, the clamp 300 is provided with a circular notch 305a at the position of the clamping surface 303a. The diameter of the circular notch 305a is denoted as φ3. The ratio of the diameter (φ3) of the circular notch to the diameter (φ1) of the clamping surface 303a is between 0.25:1 and 0.35:1. In the preferred embodiment of the clamp 300, the ratio of φ3 to φ1 is 0.3:1. When the strip steel is partially bent (see Fig. 4), the cylindrical through hole 305 accommodates the bent part, thereby further increasing the contact area between the clamp 300 and the surface of the strip steel, and improving the stability of the clamp 300 when clamping the strip steel, and avoiding the occurrence of slipping between the clamp 300 and the surface of the strip steel. Figure 5

[0039] Returning to Fig. 3, Figure 3 ​Continuing to describe the clamp 300, the clamp 300 is provided with a plurality of circumferentially spaced apart stepped through holes 306 for mounting the clamp 300. In some embodiments of the clamp 300, the stepped through holes 306 are four in number, i.e. the angle between adjacent stepped through holes 306 is 90 degrees. Specifically, the stepped through holes 306 include a large diameter section 306a and a small diameter section 306b, wherein the inner surface of the small diameter section 306b is provided with internal threads. When mounting the clamp 300, the connecting surface 304a of the clamp 300 is brought into contact with the mounting surface, and the position of the stepped through holes 306 of the clamp 300 is aligned with the position of the threaded holes on the mounting surface. A countersunk head bolt is inserted from the large diameter section 306a of the stepped through hole 306 and gradually screwed into the threaded holes on the small diameter section 306b and the mounting surface, thereby achieving mounting of the clamp 300.

[0040] Now, the movement control of the clamp 300 will be described in conjunction with the hydraulic control diagram of the clamp 300.

[0041] Referring to Figure 6 and 7 , the hydraulic system diagram for controlling the clamp 300 is shown. The hydraulic system is mainly composed of a power unit 500 and a plurality of output units 400. The number of output units 400 corresponds to the number of clamps 300, and is used to control the movement of a single clamp 300. The power unit 500 is used to supply hydraulic oil to the output units 400 to drive the moving elements (such as the piston of the hydraulic cylinder 401) of the power unit 500. Specifically, the output unit 400 includes a hydraulic cylinder 401, which is arranged vertically, i.e. the axis of the hydraulic cylinder 401 is perpendicular to the horizontal plane. For example, the hydraulic cylinder 401 can be a single piston rod 404 cylinder. The hydraulic cylinder 401 has a first cavity 402, a second cavity 403 and a piston rod 404, wherein the end of the piston rod 404 is fixedly connected to the clamp 300. By controlling the supply of hydraulic oil in the first cavity 402 and the second cavity 403 of the hydraulic cylinder 401, the up and down movement of the piston rod 404 can be controlled, thereby achieving the up and down movement control of the clamp 300. For example, by supplying hydraulic oil to the first cavity 402, the piston rod 404 drives the clamp 300 to move linearly downward.

[0042] Back to Figure 6, continue to the output unit 400 of the composition are described above, the output unit 400 also includes the first reversing valve 411, by changing the first reversing valve 411 in the spool position, namely the corresponding change the flow direction of the liquid, corresponding to the first reversing valve 411 in different states, specifically, the first reversing valve 411 has a first station, the second station and the first rest position, corresponding to the above-mentioned first reversing valve 411 has four ports, when the first reversing valve 411 in different stations, the first reversing valve 411 port in different ways to connect, respectively, the four ports in the first reversing valve 411 is marked as A1, B1, P1, T1, wherein A1 and B1 port through the first output oil way 405 and the second output oil way 406 with the first cavity 402 and the second cavity 403 of the hydraulic cylinder 401 are communicated, specifically, the A1 end of the first reversing valve 411 and the first cavity 402 through the first output oil way 405 are communicated, the B1 port of the first reversing valve 411 and the second cavity 403 are communicated through the second output oil way 406, the T1 port of the first reversing valve 411 is the oil return port, the P1 port in the first reversing valve 411 is the hydraulic oil supply port, the hydraulic oil from the power unit 500 flows into the P1 port in the first reversing valve 411, and the pipeline corresponding to the power unit 500 inputting hydraulic oil to the P1 port is marked as the oil inlet pipeline 407. Through the change of the spool position in the first reversing valve 411, the P1 port is connected with the A1 port or the B1 port, so as to selectively supply oil to the first cavity 402 or the second cavity 403 in the hydraulic cylinder 401, and the corresponding control of the clamp 300 is linearly moved upward or downward. Specifically, when the first reversing valve 411 is in the first station, the P1 port in the first reversing valve 411 is communicated with the A1 port, and the B1 and T1 are communicated, the hydraulic oil enters the first cavity 402 in the hydraulic cylinder 401 through the first output oil way 405, and the corresponding clamp 300 moves upward, when the first reversing valve 411 is in the second station, the P1 port in the first reversing valve 411 is communicated with the B1 port, and the A1 port is communicated with the T1 port, the hydraulic oil enters the second cavity 403 in the hydraulic cylinder 401 through the second output oil way 406, and the corresponding clamp 300 moves downward, when the first reversing valve 411 is in the first rest position, the A1 port and the B1 port are communicated with the T1 end, at this time, there is no hydraulic oil input in the hydraulic cylinder 401, and the corresponding clamp 300 is in the rest state.

[0043] The output unit 400 further comprises a one-way valve 408 arranged on the first output oil path 405 and the second output oil path 406, which is used to keep the hydraulic oil between the A1 port and the first cavity 402 and the B1 port and the second cavity 403 in one-way flow, so that the clamp 300 can be kept stationary in the clamping position, thereby improving the stability of the clamp 300 during the clamping process. Meanwhile, a first one-way throttle valve 409 is arranged on the first output oil path 405 and the second output oil path 406, which is used to control the flow of hydraulic oil on the first output oil path 405 and the second output oil path 406, thereby realizing the adjustment of the movement speed of the piston cylinder in the hydraulic cylinder 401 and the clamp 300 connected with the piston rod 404.

[0044] Further, the proportional pressure reducing valve 410 is arranged on the oil inlet pipeline 407 in the output unit 400, which can correspondingly adjust the proportion of the output pressure of the power unit 500 to the output pressure of the hydraulic cylinder 401, thereby realizing the adjustment of the clamping pressure of the clamp 300.

[0045] Referring to Figure 7 , the composition of the power unit 500 will be described. The power unit 500 comprises a pump body 501 and a second reversing valve 502. Similar to the first reversing valve 411, the second reversing valve 502 has a third working position, a fourth working position and a second rest position. The second reversing valve 502 has four ports, which are respectively marked as A2, B2, P2 and T2. When the second reversing valve 502 is in the third working position, the A2 port is connected with the P2 port, and the B2 port is connected with the T2 port. When the second reversing valve 502 is in the fourth working position, the A2 port is connected with the T2 port, and the B2 port is connected with the P2 port. When the second reversing valve 502 is in the second rest position, the ports in the second reversing valve 502 are not connected with each other. The composition of the power unit 500 will be further described. The pump body 501 has two ports, which are respectively marked as PA and PB. Both the PA and PB ports can be used as the input and output ports of the pump body 501. The two output ports of the pump body 501 are connected with the A2 and B2 ports in the second reversing valve 502 through an oil outlet pipeline. Specifically, the PA port of the pump body 501 and the A2 port of the second reversing valve 502 are connected through a first oil outlet pipeline 503, and the PB port of the pump body 501 and the B2 port of the second reversing valve 502 are connected through a second oil outlet pipeline 504. The T2 port in the second reversing valve 502 is the oil outlet of the power unit 500, i.e. the T2 port of the power unit 500 is connected with the P1 port in the output unit 400. When the output port of the pump body 501 in the power unit 500 changes, the second reversing valve 502 corresponds to different working positions, and correspondingly controls the A2 port or the B2 port in the second reversing valve 502 to be connected with the T2 port, so as to realize the supply of hydraulic oil to the output unit 400. Referring to Figure 7, continue to the composition of the power unit 500, the P1 port in the second reversing valve 502 is the oil return port of the power unit 500, corresponding to the part connected by the P1 port in the power unit 500 is recorded as the oil return pipeline 505, the above-mentioned oil return pipeline 505 in the power unit 500 is provided with at least two one-way second throttle valves and is provided with a third reversing valve 507 on the oil return pipeline 505, and different second one-way throttle valves 506 are selected for use.

[0046] The above-mentioned power unit 500 and output unit 400 are used in cooperation, preferably, a single power unit 500 supplies hydraulic oil to two output units 400, that is, the action of a pair of clamps 300 is controlled by a single power unit 500, so as to realize the closing and opening operation of the clamp 300 group.

[0047] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A clamp for a continuous annealing unit welding machine, characterized by: The clamp material comprises copper, and the clamp comprises: a body part having a circular clamping surface in contact with the strip surface, the body part being a cylinder, and the ratio of the diameter of the circular clamping surface to the thickness of the body part being between 7:1 and 9:1; a protrusion integrally formed with the body part and having a circular connecting surface; a cylindrical through hole arranged along the axis of the clamp and forming a circular notch at the position of the circular clamping surface, the ratio of the diameter of the circular notch to the diameter of the circular clamping surface being between 0.25:1 and 0.35:

1.

2. The clamp for a continuous annealing and pickling line as set forth in claim 1, wherein: The protrusion is a cylinder, and the ratio of the diameter of the circular connecting surface to the thickness of the protrusion is between 11:1 and 13:1, and the ratio of the diameter of the circular connecting surface to the diameter of the circular clamping surface is between 0.7:1 and 0.8:

1.

3. The clamp for a continuous annealing and pickling line as set forth in claim 1, wherein: The clamp further comprises a plurality of circumferentially arranged stepped through holes.

4. A clamping device for a continuous annealing unit welding machine, characterized in that: The clamp device comprises: a clamping assembly comprising a support seat, the support seat having a "U"-shaped clamping interval formed therein, and the clamping interval being symmetrically provided with the clamp as claimed in any one of claims 1-3.

5. The clamping device of claim 4, wherein: The clamp device further comprises an adjusting assembly, the adjusting assembly comprising: a first sensor and a second sensor arranged at a distance in a first direction, and the horizontal offset of the strip at the position being obtained according to the distance difference between the first sensor and the second sensor; a correcting assembly mounted on the support seat, the correcting assembly comprising a moving member and a lead screw mechanism for driving the moving member to move in the first direction, and the moving member being capable of being adsorbed to the strip to drive the strip to move.

6. The clamping device of claim 5, wherein: The first sensor and the second sensor are both laser sensors.

7. A hydraulic system for controlling the movement of the clamp as claimed in any one of claims 1 to 3, characterised in that: The system comprises: a power unit comprising a pump body and a second directional valve; an output unit comprising a hydraulic cylinder and a first directional valve, the A1 port of the first directional valve being in communication with the first cavity of the hydraulic cylinder through a first output oil line, the B1 port of the first directional valve being in communication with the second cavity of the hydraulic cylinder through a second output oil line, the P1 port of the first directional valve being in communication with the oil outlet of the power unit through an oil inlet line, and a proportional pressure reducing valve being arranged on the oil inlet line.

8. The hydraulic system of claim 7, wherein: Unidirectional valves are arranged on the first output oil line and the second output oil line.

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