Buffering and positioning baffle device of necking machine

Abstract

The utility model discloses a necking machine buffering positioning baffle device which comprises a second positioning baffle, four second guide rods are arranged on the second positioning baffle in a penetrating mode, the front ends of the four second guide rods penetrate through the four corners of the second positioning baffle in a sliding mode respectively, and the other ends of the four second guide rods are fixed to a buffering base. A limiting piece for preventing the second positioning baffle from being separated from the second guide rod is fixed to the end, away from the buffer base, of the second guide rod. The end of a piston rod of the second buffering cylinder is fixed to the middle of the side, close to the buffering base, of the second positioning baffle. The second guide rod is connected with an adjusting oil way and a backflow oil way, throttling valves are installed in the middle of the adjusting oil way and the middle of the backflow oil way, and one end of the adjusting oil way and one end of the backflow oil way are adjusted and controlled through a reversing valve, so that the rigidity of the buffering and positioning baffle device of the necking machine is greatly improved, and the structure is greatly simplified. And after the buffering force, the retreating speed and the distance are controlled by the throttle valve, the buffering effect is obvious, so that the oil injection leakage of the hydraulic system is radically eliminated, and the maintenance cost of equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe production, in particular to a buffer positioning baffle device for a necking machine. Background Art

[0002] As an inherent process of the CPE unit, the shrinking process is used to fix the core rod head and the rough pipe to ensure that the rough pipe is tightly combined with the core rod and the jacking frame when it is deformed by the jacking pipe.

[0003] The buffer positioning baffle of the auxiliary machine of the shrinking machine plays the role of determining the position of the mandrel head and the rough pipe when the mandrel is pre-pierced, ensuring the accuracy of the shrinking process. Shrinking can only be carried out after the baffle fixes the mandrel head and the shrinking position.

[0004] In the prior art, the existing buffer positioning baffle is composed as follows (such as Figure 1 shown):

[0005] Oil cylinders 100 (two, with sizes of Φ40 / Φ28mm and a stroke of 160mm) are arranged up and down, and their function is to pull the positioning baffle 200;

[0006] Guide rods 300 (two) are arranged left and right;

[0007] The buffer cylinder 400 is installed in the middle of the mechanism, with a size of Φ50 / Φ40mm and a stroke of 150mm;

[0008] The existing hydraulic principle of buffer positioning baffle is as follows Figure 1 As shown in the figure, when the shrinking machine is in the receiving position, that is, the jaws are open, the initial position of the buffer positioning baffle 1 is 5mm away from the shrinking die (the hydraulic cylinder and the buffer cylinder 1 are in the extended position), and the hairy tube transmitted by the roller is blocked by the positioning baffle 1. At this time, the kinetic energy of the hairy tube is small. Then, the mandrel clamping roller is inserted into the hairy tube at a speed of 0.5-2m / s. When it reaches the positioning baffle 1, due to the large kinetic energy of the mandrel, the momentum of the mandrel acts on the positioning baffle 1, which is supported by the buffer cylinder 1 and slowly retreats according to the predetermined buffer force. When it retreats to the rear limit switch, the limit switch sends a signal, and the buffer cylinder 1 and the oil cylinder extend forward together, so that the hairy tube and the mandrel are positioned 5mm away from the end face of the shrinking die. Then the switch is manually turned to make the two hydraulic cylinders synchronously retreat with the positioning baffle 1 and the buffer cylinder 1. After they are in place, shrinking begins.

[0009] It was found during production that some equipment, such as the buffer positioning baffle of the auxiliary machine of the shrinking machine, had many faults due to unreasonable structural design, such as:

[0010] The rigidity of the buffer cylinder, guide rod and oil cylinder is small, the throttling speed regulation of the hydraulic circuit cannot be controlled, the cylinder is small and the throttling port is large, resulting in the baffle being hit on the fixed frame by the core rod, causing a large impact force, often causing the oil pipe joints on the cylinder to loosen, the piston rod and guide rod of the buffer cylinder and hydraulic cylinder to be damaged, and the oil leakage and oil spraying are serious, and the buffer positioning effect is not good. Therefore, the repair time for each shift is 20 to 30 minutes, which increases the production cost and reduces the production efficiency. Therefore, a buffer positioning baffle device for the shrinking machine is needed. Utility Model Content

[0011] The purpose of the present application is to provide a buffer positioning baffle device for a necking machine to solve the problems raised in the above-mentioned background technology.

[0012] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a buffer positioning baffle device of a necking machine, comprising a positioning baffle 2, four guide rods 2 are arranged through the positioning baffle 2, the front ends of the four guide rods 2 slide through the four corners of the positioning baffle 2 respectively, the other ends of the four guide rods 2 are fixed on the buffer seat, and a limiting member for preventing the positioning baffle 2 from being separated from the guide rod 2 is fixed at one end of the guide rod 2 away from the buffer seat;

[0013] A second buffer cylinder is fixed on the buffer seat, and the end of the piston rod of the second buffer cylinder is fixed to the middle part of the second positioning baffle plate close to the buffer seat;

[0014] The second guide rod is connected with an adjusting oil circuit and a return oil circuit, throttle valves are installed in the middle of the adjusting oil circuit and the return oil circuit, and one end of the adjusting oil circuit and the return oil circuit is adjusted and controlled by a reversing valve.

[0015] Preferably, the limiting member comprises a limiting block, the diameter of which is larger than the diameter of the second guide rod and is fixed to an end of the second guide rod away from the buffer seat;

[0016] The four corners of the second positioning baffle are all provided with guide holes for the second guide rod to movably penetrate, and a limiting groove is provided on the side of the second positioning baffle away from the buffer seat, the inner diameter of the limiting groove is larger than the inner diameter of the guide hole and equal to the diameter of the limiting block.

[0017] Preferably, a compensating spring is provided on the movable sleeve of the second guide rod, one end of the compensating spring is movably abutted against one end of the second positioning baffle plate close to the buffer seat, and an adjusting member is installed on the other end of the compensating spring, which is used to adjust the telescopic length of the compensating spring.

[0018] Preferably, the adjusting member includes an adjusting slider and a fastener, the adjusting slider is movably mounted on the guide rod 2, one side of the adjusting slider is fixed to an end of the compensation spring away from the positioning baffle 2, and the fastener is used to fix the position of the adjusting slider on the guide rod 2.

[0019] Preferably, the fastener comprises an adjusting bolt, one end of which is threadedly passed through the adjusting slider and abuts against two peripheral side walls of the guide rod.

[0020] Preferably, a receiving groove is provided at one end of the second positioning baffle plate close to the buffer seat, and the inner diameter of the receiving groove is larger than the inner diameters of the guide hole and the limiting groove;

[0021] A load-bearing slider is fixed to one end of the compensation spring away from the adjusting slider. The load-bearing slider is slidably sleeved on the second guide rod, and the load-bearing slider is movably embedded in the accommodating groove.

[0022] In summary, the technical effects and advantages of the utility model are:

[0023] 1. In the utility model, through improvement, when the shrinking machine is in the receiving position, the second buffer cylinder is in the extended position, the second positioning baffle is 5mm away from the shrinking die, the hair tube transmitted by the roller is blocked by the second positioning baffle, and the mandrel is inserted into the hair tube under the action of the pinch roller. At this time, the second positioning baffle is retreated by the impact force. When the pre-penetration is in place, the proximity switch sends a signal, and the second buffer cylinder pushes the second positioning baffle forward, and finally the hair tube and the mandrel are positioned 5mm away from the shrinking die, and the second buffer cylinder and the second positioning baffle return, and then the shrinking process is implemented;

[0024] Thereby, the rigidity of the buffer positioning baffle device of the necking machine is greatly increased, the structure is greatly simplified, and after the buffer force, the backward speed and the distance are controlled by the throttle valve, the buffer effect is obvious, so that the oil leakage of the hydraulic system is fundamentally solved, the guide rod 2 is protected, the effective operation rate of the buffer positioning baffle device of the necking machine is improved, and the maintenance cost of the equipment is reduced.

[0025] 2. In the utility model, through the setting of the compensation spring, the compensation spring provides a compensating support force when the positioning baffle plate 2 is subjected to force, thereby sharing a certain impact force for the buffer cylinder 2, thereby playing a certain protective role for the buffer cylinder 2, reducing the probability of damage to the buffer cylinder 2, thereby extending the service life of the buffer cylinder 2 to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 The existing buffer positioning baffle structure and hydraulic principle diagram;

[0028] Figure 2 The buffer positioning baffle structure and hydraulic principle diagram in this embodiment;

[0029] Figure 3 Schematic diagram of the three-dimensional structure in this embodiment;

[0030] Figure 4 It is a partial side sectional view of the positioning baffle in this embodiment.

[0031] In the figure: 1. Positioning baffle plate 2; 101. Guide hole; 102. Limiting groove; 103. Accommodating groove; 2. Guide rod 2; 201. Limiting block; 3. Buffer cylinder 2; 4. Throttle valve; 5. Reversing valve; 6. Compensation spring; 7. Adjusting slider; 8. Adjusting bolt; 9. Load-bearing slider;

[0032] 100. Oil cylinder; 200. A guide rod; 300. A positioning baffle; 400. A buffer cylinder. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Example: Reference Figure 2-4 A buffer positioning baffle device for a necking machine shown in the figure comprises a positioning baffle 2 1, four guide rods 2 2 are arranged through the positioning baffle 2 1, the front ends of the four guide rods 2 2 slide through the four corners of the positioning baffle 2 1 respectively, the other ends of the four guide rods 2 2 are fixed on a buffer seat (not shown in the figure, a fixed base commonly used in the prior art and suitable for this embodiment is adopted), and a limiting member is fixed on one end of the guide rod 2 2 away from the buffer seat to prevent the positioning baffle 2 1 from being separated from the guide rod 2 2;

[0035] A buffer cylinder 2 3 is fixed on the buffer seat. The size of the buffer cylinder 2 3 is Φ80 / Φ56mm and the stroke is 150mm. The piston rod end of the buffer cylinder 2 3 is fixed to the middle of the positioning baffle 2 1 close to the buffer seat.

[0036] The guide rod 2 is connected with an adjusting oil circuit and a return oil circuit, and a throttle valve 4 is installed in the middle of the adjusting oil circuit and the return oil circuit. One end of the adjusting oil circuit and the return oil circuit is adjusted and controlled by a reversing valve 5.

[0037] Based on the above structure, when the shrinking machine is in the receiving position, the buffer cylinder 23 is in the extended position, the positioning baffle 21 is 5mm away from the shrinking die, the wool tube transmitted by the roller is blocked by the positioning baffle 21, and the core rod is inserted into the wool tube under the action of the pinch roller. At this time, the positioning baffle 21 is retreated by the impact force (the retreat speed and distance are controlled by the throttle valve 4 that controls the return oil circuit). When the pre-penetration is in place, the proximity switch sends a signal, and the buffer cylinder 23 pushes the positioning baffle 21 forward, and finally the wool tube and the core rod are positioned 5mm away from the shrinking die, and the buffer cylinder 23 and the positioning baffle 21 return, and then the shrinking process is implemented;

[0038] Thereby, the rigidity of the buffer positioning baffle device of the shrinking machine is greatly increased, the structure is greatly simplified, and after the buffer force, the backward speed and the distance are controlled by the throttle valve 4, the buffer effect is obvious, so that the oil leakage of the hydraulic system is fundamentally solved, the guide rod 2 is protected, the effective operation rate of the buffer positioning baffle device of the shrinking machine is improved, and the maintenance cost of the equipment is reduced.

[0039] Furthermore, the limiting member includes a limiting block 201, the diameter of the limiting block 201 is larger than the diameter of the guide rod 2 2 and is fixed to an end of the guide rod 2 2 away from the buffer seat;

[0040] The four corners of the positioning baffle plate 1 are provided with guide holes 101 for the guide rod 2 to move through, and the side of the positioning baffle plate 1 away from the buffer seat is provided with a limiting groove 102, the inner diameter of the limiting groove 102 is larger than the inner diameter of the guide hole 101 and is equal to the diameter of the limiting block 201;

[0041] By setting the limit block 201 and the limit groove 102, it can be ensured that the positioning baffle 21 is blocked by the limit block 201 when sliding to the end of the guide rod 22, thereby ensuring that the positioning baffle 21 will not be separated from the guide rod 22 during the resetting process.

[0042] Furthermore, a compensation spring 6 is provided on the movable sleeve of the guide rod 2, one end of the compensation spring 6 is movably abutted against one end of the positioning baffle 2 1 close to the buffer seat, and an adjustment member is installed on the other end of the compensation spring 6, and the adjustment member is used to adjust the telescopic length of the compensation spring 6;

[0043] By setting the compensation spring 6, the compensation spring 6 provides a compensating support force when the positioning baffle 21 is subjected to force, thereby sharing a certain impact force with the buffer cylinder 23, thereby playing a certain protective role on the buffer cylinder 23, reducing the probability of damage to the buffer cylinder 23, and thus extending the service life of the buffer cylinder 23 to a certain extent.

[0044] Further, the adjusting member includes an adjusting slider 7 and a fastener, the adjusting slider 7 is movably sleeved on the guide rod 2, one side of the adjusting slider 7 is fixed to an end of the compensation spring 6 away from the positioning baffle 2 1, and the fastener is used to fix the position of the adjusting slider 7 on the guide rod 2;

[0045] The fastener includes an adjusting bolt 8, one end of which is threadedly inserted through the adjusting slider 7 and abuts against the side wall of the guide rod 2;

[0046] An end of the positioning baffle plate 1 close to the buffer seat is provided with a receiving groove 103, and the inner diameter of the receiving groove 103 is larger than the inner diameters of the guide hole 101 and the limiting groove 102;

[0047] A load-bearing slider 9 is fixed to one end of the compensation spring 6 away from the adjusting slider 7 . The load-bearing slider 9 is slidably sleeved on the guide rod 2 2 , and the load-bearing slider 9 is movably embedded in the accommodating groove 103 .

[0048] When the positioning baffle plate 2 1 is subjected to impact force, the positioning baffle plate 2 1 slides backward along the guide rod 2 2, thereby driving the load-bearing slider 9 to squeeze the compensation spring 6, and the compensation spring 6 provides a buffer support force for the positioning baffle plate 2 1;

[0049] The staff can also make the adjusting slider 7 automatically slide on the guide rod 22 by unscrewing the adjusting bolt 8, and then fix the adjusting slider 7 on the guide rod 22 by screwing in the adjusting bolt 8, so as to change the telescopic length of the compensation spring 6, that is, the distance between the adjusting slider 7 and the load-bearing slider 9, so as to adjust the supporting force that the compensation spring 6 can provide to the positioning baffle 21, thereby providing different sizes of compensating supporting forces for the positioning baffle 21 according to actual needs, and protecting the buffer cylinder 23 to different degrees, thereby enhancing the flexibility of the compensation spring 6 in providing supporting force and enhancing its practicality.

[0050] Working principle of the utility model: in daily use, when the shrinking machine is in the receiving position, the buffer cylinder 23 is in the extended position, the positioning baffle 21 is 5mm away from the shrinking die, the hair tube transmitted by the roller is blocked by the positioning baffle 21, and the core rod is inserted into the hair tube under the action of the pinch roller. At this time, the positioning baffle 21 is retreated by the impact force, and the retreat speed and distance are controlled by the throttle valve 4 controlling the return oil circuit. When the pre-penetration is in place, the proximity switch sends a signal, and the buffer cylinder 23 pushes the positioning baffle 21 forward, and finally the hair tube and the core rod are positioned 5mm away from the shrinking die, and the buffer cylinder 23 and the positioning baffle 21 return, and then the shrinking process is implemented;

[0051] As a result, the rigidity of the buffer positioning baffle device of the necking machine is greatly increased, the structure is greatly simplified, and after the buffer force, the backward speed and the distance are controlled by the throttle valve 4, the buffer effect is obvious, so that the oil leakage of the hydraulic system is completely solved, the guide rod 2 is protected, the effective operation rate of the buffer positioning baffle device of the necking machine is improved, and the maintenance cost of the equipment is reduced;

[0052] At the same time, when the positioning baffle plate 2 1 is subjected to impact force, the positioning baffle plate 2 1 slides backward along the guide rod 2 2, thereby driving the load-bearing slider 9 to squeeze the compensation spring 6, and the compensation spring 6 provides a buffer support force for the positioning baffle plate 2 1;

[0053] The staff can also make the adjusting slider 7 automatically slide on the guide rod 22 by unscrewing the adjusting bolt 8, and then fix the adjusting slider 7 on the guide rod 22 by screwing in the adjusting bolt 8, so as to change the telescopic length of the compensation spring 6, that is, the distance between the adjusting slider 7 and the load-bearing slider 9, so as to adjust the supporting force that the compensation spring 6 can provide to the positioning baffle 21, thereby providing different sizes of compensating supporting forces for the positioning baffle 21 according to actual needs, and protecting the buffer cylinder 23 to different degrees, thereby enhancing the flexibility of the compensation spring 6 in providing supporting force and enhancing its practicality.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A buffer positioning baffle device for a necking machine, comprising a positioning baffle 2 (1), characterized in that: Four guide rods (2) are provided on the positioning baffle plate (1), and the front ends of the four guide rods (2) respectively slide through the four corners of the positioning baffle plate (1), and the other ends of the four guide rods (2) are fixed on the buffer seat, and a stopper is fixed on one end of the guide rod (2) away from the buffer seat to prevent the positioning baffle plate (1) and the guide rod (2) from being separated; A second buffer cylinder (3) is fixed on the buffer seat, and the piston rod end of the second buffer cylinder (3) is fixed to the middle part of the second positioning baffle (1) close to the buffer seat; The guide rod 2 (2) is connected with an adjusting oil circuit and a return oil circuit, and a throttle valve (4) is installed in the middle of the adjusting oil circuit and the return oil circuit. One end of the adjusting oil circuit and the return oil circuit is adjusted and controlled by a reversing valve (5).

2. A buffer positioning baffle device for a necking machine according to claim 1, characterized in that: The limiting member comprises a limiting block (201), the diameter of the limiting block (201) being larger than the diameter of the second guide rod (2) and being fixed to an end of the second guide rod (2) away from the buffer seat; The four corners of the second positioning baffle plate (1) are provided with guide holes (101) for the second guide rod (2) to movably pass through, and the side of the second positioning baffle plate (1) away from the buffer seat is provided with a limiting groove (102), the inner diameter of the limiting groove (102) is larger than the inner diameter of the guide hole (101) and is equal to the diameter of the limiting block (201).

3. The buffer positioning baffle device of the necking machine according to claim 1, characterized in that: A compensating spring (6) is movably sleeved on the second guide rod (2), one end of the compensating spring (6) movably abuts against one end of the second positioning baffle (1) close to the buffer seat, and an adjusting member is installed on the other end of the compensating spring (6), and the adjusting member is used to adjust the telescopic length of the compensating spring (6).

4. A buffer positioning baffle device for a necking machine according to claim 3, characterized in that: The adjusting member comprises an adjusting slider (7) and a fastener. The adjusting slider (7) is movably sleeved on the second guide rod (2). One side of the adjusting slider (7) is fixed to an end of the compensation spring (6) away from the second positioning baffle (1). The fastener is used to fix the position of the adjusting slider (7) on the second guide rod (2).

5. A buffer positioning baffle device for a necking machine according to claim 4, characterized in that: The fastener comprises an adjusting bolt (8), one end of which is threadedly inserted through the adjusting slider (7) and abuts against the side walls of the two (2) peripheral edges of the guide rod.

6. A buffer positioning baffle device for a necking machine according to claim 5, characterized in that: The second positioning baffle (1) is provided with a receiving groove (103) at one end close to the buffer seat, and the inner diameter of the receiving groove (103) is larger than the inner diameters of the guide hole (101) and the limiting groove (102); A load-bearing slider (9) is fixed to one end of the compensation spring (6) away from the adjusting slider (7); the load-bearing slider (9) is slidably sleeved on the second guide rod (2); and the load-bearing slider (9) is movably embedded in the accommodating groove (103).

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