Guide plate frame auxiliary locking mechanism for keeping stability of guide plate of perforating machine

Abstract

The invention discloses a guide plate frame auxiliary locking mechanism for keeping the stability of a guide plate of a perforating machine, which is characterized by comprising a guide plate frame vertical pressing device and two groups of base plate devices, the guide plate frame vertical pressing device is installed on the upper portion of the outer side of the puncher body. The two base plate devices are installed on the sliding seat. The guide plate frame vertical pressing device is composed of a pressing base, a pressing oil cylinder, a crank, a proximity switch, a connecting rod, a sliding rod and an adjustable pressing head. The base plate device consists of an adjustable base plate, a driving oil cylinder, a long guide seat, a sliding rod, a base plate base and a proximity switch; the shaking in the vertical direction caused by the turning moment is solved, and the quality and the yield of pierced billets are improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe production equipment, in particular to a guide plate frame auxiliary locking mechanism for maintaining the stability of a punching machine guide plate, which is used in the steel pipe punching process to ensure the quality of the punched rough pipe. Background Art

[0002] In the field of seamless steel pipe production, the piercing machine is one of the most critical equipment on the production line. The main machine is generally composed of a pair of rollers, a pair of guide plates (or guide discs), an adjustment mechanism, a locking mechanism, a transmission mechanism, etc.

[0003] The vertical punching machine is the most commonly used punching machine. Its rollers are arranged up and down, and the guide plates are arranged left and right. The rollers arranged up and down and the guide plates arranged left and right form a rolling hole pattern to ensure the smooth penetration of the punched rough pipe; the quick-change guide plate device is generally composed of a pull-out slide, a guide plate frame, two guide plate adapters, and two guide plates; the slide is driven by a cylinder and can be pulled out horizontally; the guide plate frame is installed above the slide and can move simultaneously with the slide and can rotate 180°; the guide plate adapter, online guide plate and spare guide plate are installed at both ends of the guide plate frame respectively; when a guide plate needs to be replaced, just pull the slide out of the frame and drive the guide plate frame to rotate 180°, and then the new guide plate can be pushed into the frame to complete the quick replacement of the guide plate.

[0004] At present, for punching machines that can realize rapid replacement of guide plates, the locking mechanism of the guide plate frame is generally composed of horizontal radial locking (perpendicular to the rolling line) + horizontal lateral locking (parallel to the rolling line). However, this locking method does not sufficiently restrict the guide plate frame, and there is a problem of guide plate frame shaking. The reason is that during the punching process, the hot steel billet rotates and moves forward in the closed hole formed by the upper and lower rollers and the left and right guide plates, which will form a torsional moment along the forward direction and a heeling moment perpendicular to the rolling line direction (since the steel billet is rotating, the heeling moment for the two guide plates is one upward and one downward), as well as a horizontal outward extrusion pressure perpendicular to the rolling line. The horizontal radial locking is only used to offset the outward extrusion force during rolling, and the horizontal lateral locking can only limit the torsional moment of the guide plate frame along the rolling line direction, and the heeling moment cannot be well restricted, so there is a problem of guide plate frame shaking. Especially in the production of thin-walled steel pipes, the impact load formed when the hot billet is bitten into and pierced to complete the steel throwing will cause the guide frame to shake severely, resulting in quality problems such as wall deviation at the head and tail of the rough pipe, and horseshoe at the tail; the length of the cut head and tail will increase, affecting the yield rate. Summary of the invention

[0005] The object of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a guide plate frame auxiliary locking mechanism for maintaining the stability of a punching machine guide plate.

[0006] The technical solution provided by the present invention is: a guide plate frame auxiliary locking mechanism for maintaining the stability of a punching machine guide plate, which is special in that it comprises a guide plate frame vertical pressing device and two sets of pad devices; the guide plate frame vertical pressing device is installed on the upper outer side of the punching machine body, and the two sets of pad devices are installed on the slide seat; The vertical pressing device of the guide plate frame is composed of a pressing base, a pressing cylinder, a crank, a proximity switch, a connecting rod, a sliding rod, and an adjustable pressure head; the connecting rod, the sliding rod, and the adjustable pressure head are respectively in two sets; the pressing base is installed outside the punching machine body, the pressing base is connected to the bottom end of the cylinder barrel of the pressing cylinder through a hinge shaft, the piston rod of the pressing cylinder is connected to one end of the crank through the hinge shaft, the other end of the crank is connected to one end of the connecting rod through the hinge shaft, the other end of the connecting rod is connected to one end of the sliding rod through the hinge shaft, and the other end of the sliding rod is connected to the adjustable pressure head; the pressing base is provided with a proximity switch, the proximity switch is installed near the maximum extension position of the piston rod, and the proximity switch is connected to the electronic control system of the punching machine through a circuit; The clamping oil cylinder acts as a power element to drive the crank to rotate, and the crank drives the slide bar to move up and down through the connecting rod, thereby driving the adjustable pressure head to clamp or loosen the guide plate frame; when the clamping oil cylinder is in the clamping state, the three rotating points connected by the crank, connecting rod and slide bar are close to the linear dead point state, the clamping is completed; the proximity switch acts as a locking element to send signals to the control program, prevent malfunctions and protect the equipment; The pad device is composed of an adjustable pad, a driving cylinder, a long guide seat, a sliding rod, a pad base, and a proximity switch. There are two sliding rods. The pad base is installed on the sliding seat. A cylinder is arranged on the pad base. The piston rod of the cylinder is connected to the long guide seat. Two sliding rods are arranged on the base. The long guide seat is installed on the sliding rod through a sliding sleeve. The adjustable pad is installed at the front end of the long guide seat and moves with the long guide seat. A proximity switch is arranged on the pad base, and the proximity switch is installed at the retracted position of the cylinder piston rod. The oil cylinder acts as a power element to drive the long guide seat to slide back and forth on the two slide rods; the adjustable pad moves with the long guide seat, and when the slide plate of the slide seat is worn, it can be adjusted to compensate for the wear; the proximity switch acts as an interlocking element, which is connected to the electronic control system through a line to send signals to the control program, prevent malfunctions, and protect equipment.

[0007] Furthermore, the clamping oil cylinder reaches a clamping state when it is 10 mm away from the full stroke.

[0008] Beneficial effects of the present invention: 1. On the basis of the original horizontal and vertical locking and horizontal side locking, add a vertical clamping device for the guide plate frame and two sets of pad devices; fill the gap between the guide plate frame and the slide seat. The role of the pressure plate device is to press the guide plate frame tightly against the pad to prevent vertical shaking caused by the tipping moment; 2. The vertical shaking amplitude of the guide plate frame of the punching machine has been reduced from more than 10mm when biting and throwing steel to no shaking; 3. The quality of rough pipes has been effectively improved. The horseshoe of rough pipes has been shortened by about 10-50mm, the wall thickness accuracy of the tail has been improved by 0.2-0.5mm, and the yield rate of thin-walled pipes has been increased by 0.3%. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is the installation front view of the present invention; Figure 2 It is the installation left view of the present invention; Figure 3 is a front view of the guide plate frame vertical clamping device of the present invention; Figure 4 It is a left side view of the guide plate frame vertical clamping device of the present invention; Figure 5 is a front view of the pad device of the present invention; Figure 6 It is a top view of the pad device of the present invention.

[0010] In the figure, 1 is a vertical clamping device of a guide plate frame, 2 is a pad device; 11 is a clamping base, 12 is a clamping cylinder, 13 is a crank, 14 is a proximity switch, 15 is a connecting rod, 16 is a sliding rod, 17 is an adjustable pressure head; 21 is an adjustable pad, 22 is a driving cylinder, 23 is a long guide seat, 24 is a sliding rod, 25 is a pad base, and 26 is a proximity switch. DETAILED DESCRIPTION

[0011] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings.

[0012] like Figure 1 , 2 , 3, 4, 5, and 6 show an auxiliary locking mechanism for a guide plate frame for maintaining the stability of a punching machine guide plate. On the basis of the original horizontal and vertical locking and horizontal side locking, a guide plate frame vertical clamping device 1 and a pad device 2 are added. The guide plate frame vertical clamping device 1 is installed on the upper outer side of the punching machine main body, one set for each left and right guide plate frame; 4 sets of pad devices, two sets for each left and right guide plate frame, are respectively installed on the guide plate frame entrance and exit side edges on the slide seat (see Figure 1 , Figure 2 ); The guide plate frame vertical clamping device 1 is composed of a clamping base 11, a clamping cylinder 12, a crank 13, a proximity switch 14, a connecting rod 15, a sliding rod 16, and an adjustable pressure head 17; the connecting rod 15, the sliding rod 16, and the adjustable pressure head 17 are respectively two sets; the clamping base 11 is installed outside the punching machine body, the clamping base 11 is connected to the bottom end of the cylinder barrel of the clamping cylinder 12 through a hinge shaft, the piston rod of the clamping cylinder 12 is connected to one end of the crank 13 through a hinge shaft, the other end of the crank 13 is connected to one end of the connecting rod 15 through a hinge shaft, the other end of the connecting rod 15 is connected to one end of the sliding rod 16 through a hinge shaft, and the other end of the sliding rod 16 is connected to the adjustable pressure head 17; the proximity switch 14 is installed on the clamping base 11, the proximity switch 14 is installed near the maximum position of the piston rod, and the proximity switch 14 is connected to the punching machine electronic control system through a line (see Figure 3 , Figure 4 ); The clamping oil cylinder 12 is used as a power element to drive the crank 13 to make a rotary motion. The crank 13 drives the slide bar 16 to move up and down through the connecting rod 15, thereby driving the adjustable pressure head 17 to clamp or loosen the guide plate frame; the stroke of the clamping oil cylinder 12 is reasonably selected, and the proportional relationship between the long arm and the short arm of the crank 13 is selected, so that the clamping state is reached when the clamping oil cylinder 12 is 10 mm away from the full stroke; in the clamping state, the three rotating points connected by the crank 13, the connecting rod 15, and the slide bar 16 are close to the linear dead point state; in this way, the clamping oil cylinder 12 can press the huge turning moment of the guide plate frame with very little force, and the clamping oil cylinder 12 basically only plays a driving role, and a smaller cylinder diameter can be selected without increasing a lot of flow, and the original hydraulic system can be used without adding a hydraulic pump station to reduce costs; the adjustable pressure head 17 plays a fine-tuning role by replacing pads of different thicknesses, which is used to eliminate installation and processing errors; the proximity switch 14 is used as a chain element to send signals to the control program, prevent malfunctions, and protect equipment; The pad device 2 is composed of an adjustable pad 21, a driving cylinder 22, a long guide seat 23, a slide rod 24, a pad base 25, and a proximity switch 26. There are two slide rods 24. The pad base 25 is installed on the slide seat. The cylinder 22 is installed on the pad base 25 through an ear seat. The piston rod of the cylinder 22 is connected to the long guide seat 23. Two slide rods 24 are installed on the base 25. The long guide seat 23 is installed on the slide rod 24 through a sliding sleeve. The adjustable pad 21 is installed at the front end of the long guide seat 23 and moves with the long guide seat 23. The proximity switch 26 is installed on the pad base 25. The proximity switch 26 is installed in the retracted position of the piston rod of the cylinder 22 (see Figure 5 , Figure 6 ); The oil cylinder 22 is used as a power element to drive the long guide seat 23 to slide back and forth on the two slide rods 24; the adjustable pad 21 moves with the long guide seat 23, and when the slide plate of the slide seat is worn, it can be adjusted to compensate for the wear; the proximity switch 26 is used as a locking element, which is connected to the punching machine electronic control system through a line to send signals to the control program, prevent malfunctions, and protect the equipment.

[0013] The invention provides an auxiliary locking mechanism for a guide plate frame for maintaining the stability of a punching machine guide plate. When the guide plate needs to be replaced, the clamping device is first released, and after the proximity switch 14 sends a signal, the horizontal lateral locking and releasing, the horizontal radial locking and releasing, the guide plate frame is pulled out, the pad device is extracted, the proximity switch 24 sends a signal, and the guide plate frame is rotated 180°; then the above actions are reversed to complete the entire process of replacing the guide plate and put into production.

[0014] It should be understood that the technical features not elaborated in detail in this specification belong to the prior art. Although the implementation methods of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific implementation methods, which are merely illustrative and not restrictive. Ordinary technicians in this field can make more forms under the enlightenment of the present invention without departing from the scope of protection of the present invention and the claims, which are all within the protection scope of the present invention.

Claims

1. A guide plate frame auxiliary locking mechanism for maintaining the stability of a punching machine guide plate, characterized in that: It comprises a guide plate frame vertical pressing device (1) and two sets of pad devices (2); the guide plate frame vertical pressing device (1) is installed on the upper outer side of the punching machine body, and the two sets of pad devices (2) are installed on the slide seat; The guide plate frame vertical clamping device (1) is composed of a clamping base (11), a clamping cylinder (12), a crank (13), a proximity switch (14), a connecting rod (15), a sliding rod (16), and an adjustable pressure head (17); the connecting rod (15), the sliding rod (16), and the adjustable pressure head (17) are respectively two sets; the clamping base (11) is installed outside the punching machine body, the clamping base (11) is connected to the bottom end of the cylinder barrel of the clamping cylinder (12) through a hinge shaft, and the clamping cylinder (12) The piston rod is connected to one end of the crank (13) through a hinge shaft, the other end of the crank (13) is connected to one end of the connecting rod (15) through a hinge shaft, the other end of the connecting rod (15) is connected to one end of the sliding rod (16) through the hinge shaft, and the other end of the sliding rod (16) is connected to the adjustable pressure head (17); the clamping base (11) is provided with a proximity switch (14), the proximity switch (14) is installed near the maximum extension position of the piston rod, and the proximity switch (14) is connected to the electric control system of the punching machine through a line; The clamping oil cylinder (12) serves as a power element to drive the crank (13) to make a rotational motion, and the crank (13) drives the slide bar (16) to move up and down through the connecting rod (15), thereby driving the adjustable pressure head (17) to clamp or loosen the guide plate frame; when the clamping oil cylinder (12) is in a clamping state, the clamping is completed when the three rotation points connected by the crank (13), the connecting rod (15) and the slide bar (16) are close to a linear dead point state; the proximity switch (14) serves as a locking element to send a signal to the control program, prevent malfunction, and protect the equipment; The pad device (2) is composed of an adjustable pad (21), a driving cylinder (22), a long guide seat (23), a sliding rod (24), a pad base (25), and a proximity switch (26). There are two sliding rods (24); the pad base (25) is mounted on the sliding seat, a cylinder (22) is arranged on the pad base (25), a piston rod of the cylinder (22) is connected to the long guide seat (23), two sliding rods (24) are arranged on the base (25), the long guide seat (23) is mounted on the sliding rod (24) through a sliding sleeve, the adjustable pad (21) is mounted on the front end of the long guide seat (23), and moves with the long guide seat (23); the pad base (25) is provided with a proximity switch (26), and the proximity switch (26) is installed at the retracted position of the piston rod of the cylinder (22); The oil cylinder (22) acts as a power element to drive the long guide seat (23) to slide back and forth on the two slide bars (24); the adjustable pad (21) moves with the long guide seat (23) and can play a compensatory role through adjustment when the slide plate of the slide seat is worn; the proximity switch (26) acts as a locking element and is connected to the punching machine electronic control system through a line to play a role in sending signals to the control program, preventing malfunctions, and protecting the equipment.

2. A guide plate frame auxiliary locking mechanism for maintaining the stability of a punching machine guide plate according to claim 1, characterized in that: The clamping oil cylinder (12) reaches a clamping state when it is 10 mm away from the full stroke.

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