Novel three-roller core holding device of perforating machine

Abstract

The utility model relates to a novel three-roller core holding device of a puncher. The novel three-roller core holding device comprises a rack, the three swing rods are hinged to the machine frame; the holding rollers are arranged at the ends, close to one another, of the three swing rods and used for clamping the core rod; the adjusting assembly is arranged between the holding rollers and the swing rod and used for adjusting the relative positions of the holding rollers and the swing rod so as to adjust the centrality of the three holding rollers. According to the novel three-roller holding core device of the perforating machine, the relative positions of the holding rollers and the swing rod can be adjusted through the adjusting assembly during assembly, the eccentric error of a three-roller holding core is eliminated, and therefore the problems that the eccentricity rate of a penetrated finished tubular billet is increased, and the rate of finished products is reduced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal pipe processing machinery, in particular to a novel three-roller core-holding device for a punching machine. Background Art

[0002] The punching machine is one of the important equipment in the production of seamless steel pipes. This process is to pierce and roll the solid tube into a hollow rough tube through the punching machine, which is the first process of metal deformation. Among them, the three-roller core holding is one of the most important parts of the punching machine. In the working process of the punching machine, it plays the role of the core holding rod and the rough tube limiter, which plays a vital role in the quality of the seamless steel pipe produced by the punching machine.

[0003] Existing three-roller core-holding devices, such as the one mentioned in 201210052053.9 and the two mentioned in 201210052053.9, all have theoretical errors. Coupled with accidental errors in mechanical manufacturing, the center of the existing rollers often deviates from the rolling center by 0.5mm-2mm, resulting in an increase in the eccentricity of the finished rough pipe and a decrease in the yield. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a novel three-roller core-holding device for a punching machine, which solves the problem of the centrality deviation of the existing three-roller core-holding device, which causes the eccentricity of the punched finished rough tube to increase and the yield to decrease.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] The embodiment of the utility model provides a novel three-roller core-holding device for a punching machine.

[0009] The utility model provides a novel three-roller core holding device for a punching machine, comprising:

[0010] frame;

[0011] Three swing arms, the three swing arms are hinged on the frame;

[0012] The holding roller is arranged at one end of the three swing rods close to each other and is used to clamp the mandrel;

[0013] The adjusting component is arranged between the holding roller and the swing rod, and is used to adjust the relative position of the holding roller and the swing rod to adjust the center degree of the three holding rollers.

[0014] Optionally, the regulating component comprises:

[0015] Eccentric shaft, the eccentric shaft is rotatably mounted on the swing rod, and the holding roller is coaxially rotatably mounted on the eccentric shaft;

[0016] The fixing assembly is arranged between the swing rod and the eccentric shaft, and is used to fix the eccentric shaft and the swing rod relatively.

[0017] Optionally, the fixing assembly includes:

[0018] A fixed cover, the fixed cover is fixedly installed on the swing rod;

[0019] The fixing bolt is arranged between the fixing cover and the eccentric shaft, and is used to relatively fix the fixing cover and the eccentric shaft.

[0020] Optionally, it also includes:

[0021] The driving assembly is connected with the swing rod and is used for driving the three holding rollers to move toward each other through the swing rod.

[0022] Optionally, the drive assembly includes:

[0023] Motion distributor, the motion distributor is hinged on the frame, and one end of the three swing arms away from the holding roller is connected to the motion distributor;

[0024] A hydraulic cylinder, the output end of the hydraulic cylinder is rotatably connected to the motion distributor, and is used to drive the motion distributor to rotate.

[0025] Optionally, the drive assembly further includes:

[0026] Two connecting rods, the two connecting rods are rotatably mounted at two ends of the motion distributor, and one end of the connecting rod away from the motion distributor is rotatably connected to the swing rod;

[0027] Another rocker is fixedly connected to the motion distributor.

[0028] Optionally, the drive assembly further includes:

[0029] A hydraulic cylinder joint, the hydraulic cylinder joint is rotationally connected to the motion distributor;

[0030] A fastening screw is arranged on the end surfaces of the hydraulic cylinder joint and the hydraulic cylinder close to each other;

[0031] The opening adjustment screw is arranged between the two fastening screws and is used to adjust the relative position of the hydraulic cylinder joint and the hydraulic cylinder.

[0032] Optionally, the hydraulic cylinder is a double-stroke hydraulic cylinder.

[0033] (III) Beneficial effects

[0034] The beneficial effect of the utility model is that a new three-roller core-holding device for a punching machine of the utility model comprises a frame, a rocker arm, a holding roller and an adjusting component. The relative position of the holding roller and the rocker arm can be adjusted by the adjusting component during assembly to eliminate the eccentricity error of the three-roller core-holding, thereby solving the problem of increased eccentricity of the finished rough tube and decreased yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the main structure of a new three-roller core-holding device for a punching machine according to the utility model;

[0036] Figure 2 It is a side view structural diagram of a new type of three-roller core-holding device of a punching machine according to the utility model;

[0037] Figure 3 It is a schematic diagram of the main structure of the adjustment assembly of a new three-roller core-holding device of a punching machine according to the utility model;

[0038] Figure 4 It is a schematic diagram of a novel three-roller core-holding device of a punching machine according to the utility model.

[0039] [Description of Reference Numerals]

[0040] 100-frame, 200-swing rod, 300-holding roller, 400-adjustment component, 500-drive component;

[0041] 410-eccentric shaft, 420-fixed assembly;

[0042] 510-motion distributor, 520-hydraulic cylinder, 530-connecting rod, 540-hydraulic cylinder joint, 550-opening adjustment screw, 560 fastening screw;

[0043] 421-fixing cover, 422-fixing bolts. DETAILED DESCRIPTION

[0044] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0045] like Figures 1 to 4As shown, according to the embodiment of the present application, a new three-roller core holding device for a punching machine is proposed, including: a frame 100; three rocker arms 200, the three rocker arms 200 are hinged on the frame 100; a holding roller 300, the holding roller 300 is arranged at one end of the three rocker arms 200 close to each other, and is used to clamp the core rod; an adjustment component 400, the adjustment component 400 is arranged between the holding roller 300 and the rocker arm 200, and is used to adjust the relative position of the holding roller 300 and the rocker arm 200, so as to adjust the center degree of the three holding rollers 300.

[0046] In this technical solution, the embodiment of the present application proposes a novel three-roller core holding device for a punching machine, comprising a frame 100, a swing rod 200, a holding roller 300 and an adjustment assembly 400, wherein there are three swing rods 200, and the holding roller 300 is installed on the swing rod 200 through the adjustment assembly 400. At the same time, the three swing rods 200 are hingedly installed on the frame 100, and the holding roller 300 is rotatably installed at one end of the swing rod 200 close to each other. For example, the three holding rollers 300 are arranged in a triangle, and the three holding rollers 300 are used to clamp the core rod, and the relative position of the holding roller 300 and the swing rod 200 is adjusted by the adjustment assembly 400;

[0047] When assembling the three-roller core-embracing machine, first fix the standard mandrel at the center of the three-roller core-embracing machine, first adjust and fix the relative positions of one or two groups of the holding rollers 300 and the rocker rods 200 through the adjusting assembly 400, then move the three holding rollers 300 towards each other through the driving assembly 500 until one or two groups of the holding rollers 300 fit tightly against the mandrel, then adjust the remaining holding rollers 300 through the adjusting assembly 400 so that their positions are fixed relative to the corresponding rocker rod positions, so that the three holding rollers 300 fit tightly against the mandrel at the same time, and the eccentricity error of the three-roller core-embracing machine can be completely eliminated at this time.

[0048] When steel pipes of different specifications need to be threaded, the corresponding mandrel specifications change. At this time, it is only necessary to repeat the above process to eliminate the concentricity deviation of the three rollers corresponding to the mandrels of different specifications.

[0049] like Figures 2 to 4 As shown, in some examples, the adjustment assembly 400 includes: an eccentric shaft 410, the eccentric shaft 410 is rotatably mounted on the rocker arm 200, and the holding roller 200 is coaxially rotatably mounted on the eccentric shaft 410; and a fixing assembly 420, the fixing assembly 420 is disposed between the rocker arm 200 and the eccentric shaft 410, and is used to relatively fix the eccentric shaft 410 and the rocker arm 200.

[0050] In this technical solution, the adjustment component 400 includes an eccentric shaft 410 and a fixing component 420, wherein the eccentric shaft 410 is rotatably mounted on the rocker arm 200, and the holding roller 300 is rotatably mounted on the eccentric shaft 410. When the eccentric shaft 410 rotates eccentrically relative to the rocker arm 200, the holding roller 300 rotates eccentrically relative to the rocker arm 200 together with the eccentric shaft 410, thereby realizing the adjustment of the position of the holding roller 300 relative to the rocker arm 200. When adjusted to a suitable position, the eccentric shaft 410 and the rocker arm 200 are fixed by the fixing component 420, so that the eccentric shaft 410 and the rocker arm 200 are relatively fixed. When the eccentric shaft 410 and the rocker arm 200 are relatively fixed, it can be ensured that the relative position of the holding roller 300 and the rocker arm 200 is also fixed.

[0051] like Figures 1 to 4 As shown, in some examples, the fixing assembly 420 includes: a fixing cover 421, which is fixedly mounted on the rocker arm 200; and a fixing bolt 422, which is disposed between the fixing cover 421 and the eccentric shaft 410, for fixing the fixing cover 421 and the eccentric shaft 410 relative to each other.

[0052] In this technical solution, the fixing assembly 420 includes a fixing cover 421 and a fixing bolt 422, wherein the fixing cover 421 is fixedly installed on the rocker arm 200. When the eccentric shaft 410 is rotated and adjusted relative to the rocker arm 200, the eccentric shaft 410 is fixed by the fixing bolt 422. For example, when the eccentric shaft 410 and the fixing cover 421 are relatively fixed, the fixing bolt 422 is threadedly penetrated through the fixing cover 421 and is threadedly connected to the eccentric shaft 410. At this time, under the action of the fixing bolt 422, the eccentric shaft 422 and the fixing cover 421 can be relatively fixed.

[0053] like Figure 1 , Figure 3 and Figure 4 As shown, in some examples, the novel three-roller core-holding device of the punching machine further includes: a driving assembly 500, wherein the driving assembly 400 is connected to the swing rod 200, and is used to drive the three above-mentioned holding rollers 300 to move toward each other through the swing rod 200.

[0054] In this technical solution, the novel three-roller core-holding device of the punching machine also includes a driving assembly 500 connected to the rocker arm 200. The driving assembly 500 can drive the three holding rollers 300 to move toward or away from each other, thereby controlling the size of the gap between the three holding rollers 300, so that core rods of different models and diameters can be placed, thereby improving its practicality.

[0055] like Figure 1 , Figure 3 and Figure 4As shown, in some examples, the driving assembly 500 includes: a motion distributor 510, the motion distributor 510 is hinged on the frame 100, and one end of the three rocker arms 200 away from the holding roller 300 is connected to the motion distributor 510; a hydraulic cylinder 520, the output end of the hydraulic cylinder 520 is rotatably connected to the motion distributor 510, and is used to drive the motion distributor 510 to rotate.

[0056] The motion distributor 510 is a bending motion distributor; the hydraulic cylinder 520 is a double-stroke hydraulic cylinder;

[0057] like Figure 1 , Figure 3 and Figure 4 As shown, in some examples, the driving assembly 500 further includes: two connecting rods 530, the two connecting rods 530 are rotatably mounted at both ends of the motion distributor 510, one end of the connecting rod 530 away from the motion distributor 510 is rotatably connected to the rocker arm 200; and the other rocker arm 200 is fixedly connected to the motion distributor 510.

[0058] Exemplarily, two connecting rods 530 connected to the swing rods 200 are rotatably mounted at two ends of the motion distributor 510 , and another swing rod 200 is fixedly connected to the bend of the motion distributor 510 .

[0059] like Figures 1 to 4 As shown, in some examples, the driving assembly 500 further includes: a hydraulic cylinder joint 540, which is rotatably connected to the motion distributor 510; a fastening screw 560, which is arranged on the end surfaces of the hydraulic cylinder joint 540 and the hydraulic cylinder 520 that are close to each other; and an opening adjustment screw 550, which is arranged between the two fastening screws 560 and is used to adjust the relative position of the hydraulic cylinder joint 540 and the hydraulic cylinder 520.

[0060] In some examples, the three holding rollers 300 are arranged in a triangle.

[0061] Among them, the frame 100 is used to play a supporting role and provide a fulcrum for each movement. The holding roller 300 is installed at the output end of the three rocker arms 200. The holding roller 300 is equipped with a bearing inside, and the bearing is installed on the eccentric shaft 410. The eccentric shaft 410 has an eccentricity of 2.5 mm at both ends. A fixing cover 421 is installed on one side of the eccentric shaft 410. After the eccentric position of the eccentric shaft 410 is adjusted, holes are drilled on the eccentric shaft 410 and the fixing cover 421, and fixing bolts 422 are installed.

[0062] like Figure 4As shown, two swing arms 200 and a motion distributor 510 form two sets of parallelogram structures. The cylinder rod of the hydraulic cylinder 520 is hinged to one of the output ends of the motion distributor 510, and the hydraulic cylinder 520 drives the motion distributor 510 to rotate. The hydraulic cylinder 520 is installed on the frame 100. The opening adjustment screw 550 is installed on the cylinder rod of the hydraulic cylinder 520, dividing the hydraulic cylinder rod into two parts. There are fastening screws 560 at both ends of the opening adjustment screw 550. One end of the opening adjustment screw 550 is a left-handed thread, and the other end is a right-handed thread. Correspondingly, the fastening screws 560 at both ends are left-handed threads and right-handed threads.

[0063] The working process of this device is as follows:

[0064] When assembling the three-roller core, fix the standard mandrel at the center of the three-roller core, first fix an eccentric shaft 410 and its corresponding fixed cover 421 with fixing bolts 422, hydraulically drive the hydraulic cylinder 520 to extend its cylinder rod until the fixed holding roller 300 of the three-roller core contacts the surface of the mandrel, then rotate the other eccentric shafts 410 to make the holding roller 300 contact the surface of the mandrel, then drill holes and fix the fixing bolts 422, at which point the eccentricity error of the three-roller core is completely eliminated.

[0065] When it is necessary to thread pipes of different specifications, the specifications of the mandrel change. At this time, you only need to repeat the above process to eliminate the concentricity deviation of the three rollers corresponding to the mandrels of different specifications.

[0066] When the three-roller core-holding works normally, when the hydraulic cylinder 520 is fully retracted, the three-roller core-holding opening is the smallest, and it is in the top rod holding position. When the hydraulic cylinder 520 extends the cylinder rod and completes the first stroke, the three-roller core-holding opening becomes larger, and it is in the rough pipe holding position; when the hydraulic cylinder 520 is fully extended, that is, when both strokes are completed, the three-roller core-holding opening is the largest, and the transportation mechanism transports the perforated seamless steel pipe away.

[0067] When different seamless steel pipes require different small openings, loosen the fastening screw 560, turn the opening adjustment screw 550, the rod length of the hydraulic cylinder 520 changes, and the corresponding three-roller core-holding small opening changes, then tighten the fastening screw 560 to complete the adjustment.

[0068] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0071] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0072] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A new three-roller core holding device for a punching machine, characterized in that: include: frame; Three swing arms, the three swing arms are hinged on the frame; A holding roller, which is arranged at one end of the three swing rods close to each other and is used to clamp the mandrel; An adjusting component is disposed between the holding roller and the swing rod, and is used for adjusting the relative position of the holding roller and the swing rod to adjust the center degrees of the three holding rollers.

2. The novel three-roller core-holding device for a punching machine as claimed in claim 1 is characterized in that: The adjustment component comprises: An eccentric shaft, wherein the eccentric shaft is rotatably mounted on the swing rod, and the holding roller is coaxially rotatably mounted on the eccentric shaft; A fixing assembly is disposed between the swing rod and the eccentric shaft, and is used to relatively fix the eccentric shaft and the swing rod.

3. The novel three-roller core-holding device for a punching machine as claimed in claim 2 is characterized in that: The fixing assembly comprises: A fixed cover, the fixed cover is fixedly mounted on the swing rod; A fixing bolt is disposed between the fixing cover and the eccentric shaft, and is used to relatively fix the fixing cover and the eccentric shaft.

4. The novel three-roller core-holding device for a punching machine as claimed in claim 1 is characterized in that: Also includes: A driving assembly is connected to the rocker bar and is used to drive the three holding rollers to move toward each other through the rocker bar.

5. The novel three-roller core-holding device for a punching machine as claimed in claim 4 is characterized in that: The drive assembly comprises: A motion distributor, the motion distributor is hinged on the frame, and one end of the three swing arms away from the holding roller is connected to the motion distributor; A hydraulic cylinder, wherein the output end of the hydraulic cylinder is rotatably connected to the motion distributor, and is used to drive the motion distributor to rotate.

6. The novel three-roller core-holding device for a punching machine as claimed in claim 5, characterized in that: The drive assembly also includes: Two connecting rods, the two connecting rods are rotatably mounted on two ends of the motion distributor, and one end of the connecting rod away from the motion distributor is rotatably connected to the swing rod; The other swing rod is fixedly connected to the motion distributor.

7. The novel three-roller core-holding device for a punching machine as claimed in claim 5 is characterized in that: The drive assembly also includes: A hydraulic cylinder joint, the hydraulic cylinder joint being rotatably connected to the motion distributor; A fastening screw is arranged on the end surfaces of the hydraulic cylinder joint and the hydraulic cylinder that are close to each other; An opening adjustment screw is arranged between the two fastening screws and is used for adjusting the relative position of the hydraulic cylinder joint and the hydraulic cylinder.

8. The novel three-roller core-holding device for a punching machine as claimed in claim 5, characterized in that: The hydraulic cylinder is a double-stroke hydraulic cylinder.

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