Chuck jaw, chuck, three-chuck laser pipe cutting machine and use method of three-chuck laser pipe cutting machine

Abstract

The invention belongs to the technical field of laser pipe cutting machines, and particularly relates to a chuck jaw, a chuck, a three-chuck laser pipe cutting machine and a use method of the three-chuck laser pipe cutting machine. The chuck jaw comprises a support and a roller arranged on the support, one or more prismatic surfaces are arranged on the outer surface of the roller, one or more piston rods capable of being in contact with the prismatic surfaces and an air cylinder for driving the piston rods are arranged in the support, and the upper end face of each piston rod is a V-shaped surface. The piston rods with the V-shaped surfaces and the rollers with the prismatic surfaces are arranged on the clamping jaws of the chuck, the rollers are locked through cooperation of the V-shaped surfaces and the prismatic surfaces when the piston rods are jacked up, rolling of the rollers is prevented, the rollers are converted into clamping plates, and therefore the clamping plates can be clamped by means of friction force of the rollers and pipes when the whole chuck moves. And two functions of clamping and fixing the pipe are realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser tube cutting machines, and in particular relates to a chuck jaw, a chuck, a three-chuck laser tube cutting machine and a use method thereof. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] The laser tube cutting machine is composed of multiple chucks arranged on the bed. The chucks clamp the tubes and rotate or move to cut the tubes with lasers. In order to meet the different cutting methods of the tubes and the transportation of the tubes after cutting, the chucks need to have different uses. Taking the three-chuck laser tube cutting machine as an example, the three-chuck laser tube cutting machine includes a rear chuck mechanism (C1 chuck), a middle chuck mechanism (C2 chuck) and a front chuck mechanism (C3 chuck). The C1 chuck is a barrel-type chuck used to clamp the tube. It pushes or pulls the tube while rotating and moves axially with the tube; the C2 chuck is a through-type chuck with a roller claw. It clamps the tube and guides the tube to move axially during cutting, and does not move with the tube; and the C3 chuck needs to realize the two functions of clamping and guiding the tube and clamping and fixing to meet different cutting scenarios.

[0004] In order to achieve the two functions of clamping and guiding and clamping and fixing the pipe, the jaws of the C3 chuck need to have two forms of switchable rollers and clamps. In the prior art, the jaws are manually switched or a double-sided chuck with rollers and clamps is set to meet the functional requirements. The manual switching of the jaws is cumbersome and affects the clamping accuracy of the chuck. After the replacement, the unloading action logic of the equipment needs to be switched, which affects the cutting efficiency. The double-sided chuck has a relatively complex structure, the chuck is thick and heavy as a whole, the dynamic performance is low, and the cost is high. Summary of the invention

[0005] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a chuck jaw, a chuck, a three-chuck laser pipe cutting machine and a method of using the same. The present invention provides an edge face on the roller and a piston rod with a V-shaped surface as a locking device. The V-shaped surface of the piston rod cooperates with the edge face to quickly lock the roller. The roller can be switched to a clamping plate to achieve a clamping function, so that the chuck has both the functions of clamping and guiding and clamping and fixing, further optimizing the working logic and working efficiency of the chuck.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In the first aspect, the present invention provides a chuck jaw, comprising a support and a roller arranged on the support, one or more edges are arranged on the outer surface of the roller, one or more piston rods that can contact the edges and a cylinder for driving the piston rod are arranged in the support, and the upper end surface of the piston rod is a V-shaped surface.

[0008] By lifting the piston rod, the V-shaped surface and the edge surface are locked to prevent the roller from rolling, and the roller is converted into a clamping plate. Then, when the chuck moves as a whole, the friction between the roller and the pipe is used to clamp the pipe to move. If the V-shaped surface and the edge surface are not set, the contact area between the upper end plane of the piston rod and the arc surface of the roller is small, and the roller can only be prevented from rolling by the friction of the contact surface, and it is difficult to achieve the locking of the roller through the mechanical structure; and when the mass of the pipe is too large, the friction between the piston rod and the roller contact surface is difficult to offset the friction between the pipe and the roller, so that the roller cannot be prevented from rolling due to factors such as pipe vibration, and the clamping function of the clamping plate cannot be achieved, causing the pipe to leave the work station.

[0009] Preferably, the support comprises a base and two roller support seats arranged on the base, and two ends of the roller are respectively slidably connected to the two roller support seats.

[0010] Further preferably, one or more bearings are arranged inside the roller support seat, and the two ends of the roller are slidably connected to the two roller support seats respectively through the bearings.

[0011] Preferably, a sealing gland is provided on the top of the cylinder, a lower air nozzle joint and an upper air nozzle joint are provided on the side of the cylinder, a groove is provided on the lower end surface of the piston rod, and a sealing ring is provided in the groove.

[0012] Preferably, when there are multiple piston rods, the multiple piston rods are connected by a piston rod connector, and axial movement limiting members are provided at both ends of the piston rod connector. The piston rod connector enables the multiple piston rods to rise and fall synchronously and prevents the piston rods from rotating, thereby ensuring a close fit between the V-shaped surface and the edge surface.

[0013] Preferably, the support is provided with a guide sleeve mounting hole for mounting the guide sleeve, which cooperates with a guide post mounted inside the chuck, and is driven by a main cylinder inside the chuck to make the chuck claw move linearly inside the chuck to clamp pipes of different sizes.

[0014] Preferably, the number of edges of the facet is greater than or equal to six, and the inner angles of the V-shaped facet and the facet are equal. When the inner angles of the facet and the V-shaped facet are different, locking can be achieved. When the inner angles are equal, the facet and the V-shaped facet can be completely fitted together, further preventing the roller from rolling.

[0015] In a second aspect, the present invention provides a chuck provided with four chuck jaws as described in the first aspect.

[0016] In a third aspect, the present invention provides a three-chuck pipe cutting machine, which comprises a C1 chuck, a C2 chuck, a C3 chuck and a cutting head, wherein the C2 chuck and / or the C3 chuck are the chucks as described in the second aspect.

[0017] In a fourth aspect, the present invention provides a method for using the three-chuck pipe cutting machine according to the third aspect, comprising at least one of the following steps:

[0018] S1. Set the C1 chuck, C2 chuck and C3 chuck to the left side of the cutting head. The pipe starts to be cut. The C1 chuck pushes and pulls the pipe axially for cutting. The C2 chuck and C3 chuck clamp and guide the pipe.

[0019] S2, setting the C1 chuck and the C2 chuck on the left side of the cutting head and the C3 chuck on the right side of the cutting head, the C3 chuck clamps and guides the pipe during the cutting process, and the C3 chuck moves axially out of the cut pipe after the cutting is completed;

[0020] S3, set the C1 chuck and the C2 chuck on the left side of the cutting head, and the C3 chuck on the right side of the cutting head; the C1 chuck pushes and pulls the pipe for laser cutting, and the pipe is not cut; during the cutting process, the C2 chuck clamps and guides the pipe on the left side of the cutting head, and the C3 chuck clamps and guides the pipe on the right side of the cutting head. When the pipe is cut, the C3 chuck moves out the cut pipe;

[0021] S4. Set the C1 chuck on the left side of the cutting head, and the C2 chuck and C3 chuck on the right side of the cutting head; during the cutting process, the C1 chuck pushes and pulls the pipe to cut, the C2 chuck clamps and guides the pipe, and the C3 chuck clamps and fixes the pipe for axial movement; after the tail material is cut off, the C2 chuck returns to the left side of the cutting head, and the C3 chuck clamps the pipe for unloading.

[0022] The beneficial effects achieved by one or more technical solutions of the present invention are as follows:

[0023] The present invention arranges a piston rod with a V-shaped surface and a roller with an angular surface on the chuck claws. When the piston rod is lifted, the V-shaped surface and the angular surface cooperate to lock the roller, preventing the roller from rolling and converting it into a clamping plate. Then, when the chuck moves as a whole, the friction between the roller and the pipe is relied upon to achieve the two functions of clamping and fixing the pipe.

[0024] The present invention further ensures the close cooperation between the piston rod and the roller through the sealing device and the connecting rod, thereby improving the clamping and tightening capability of the pipe.

[0025] The roller of the chuck jaw can roll freely relative to the tube to realize the guiding function of the tube, and can also clamp and fix the tube and move the tube axially, so that the chuck can be set at different positions of the laser tube cutting machine, enrich the unloading logic of the laser tube cutting machine, and improve the cutting efficiency of the laser tube cutting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 It is a structural schematic diagram of the chuck jaws in Example 1;

[0028] Figure 2 is a transverse half-section view of the chuck jaws in Example 1;

[0029] Figure 3 is a vertical cross-sectional view of the chuck jaws in Example 1;

[0030] Figure 4 is a schematic diagram of the structure of the roller in Example 1;

[0031] Figure 5 Schematic diagram of the structure of the piston rod in Example 1;

[0032] Figure 6 This is a schematic diagram of the first working condition of the three-chuck pipe cutting machine in Example 3;

[0033] Figure 7 This is a schematic diagram of the second working condition of the three-chuck pipe cutting machine in Example 3;

[0034] Figure 8 Schematic diagram of the third working state of the three-chuck pipe cutting machine in Example 3;

[0035] Fig. 9 Schematic diagram of the fourth working state of the three-chuck pipe cutting machine in Example 3;

[0036] In the figure: 101 is a base, 102 is a roller support seat, 103 is a roller, 104 is a piston rod, 105 is a piston rod connector, 106 is a lower air nozzle joint, 107 is an upper air nozzle joint, 108 is a sealing cover, 1011 is a cylinder, 1012 is a guide sleeve mounting hole, 1021 is a bearing, 1031 is a prism, 1041 is a V-shaped surface, 1 is a C1 chuck, 2 is a C2 chuck, 3 is a C3 chuck, 4 is a cutting machine, and 5 is a pipe. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to more clearly understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in combination with specific embodiments and comparative examples.

[0038] Example 1

[0039] like Figure 1 , Figure 2 and Figure 3As shown, the chuck jaws include a support consisting of a base 101 and two roller support seats 102 and a roller 103 arranged on the support. Two piston rods 104 connected by a piston rod connector 105 and two cylinders 1011 for driving the piston rods are arranged on the base 101. A lower air nozzle joint 106 and an upper air nozzle joint 107 are provided on the side of the cylinder 1011. The upper part of the cylinder 1011 is pressed by a sealing gland 108 and sealed with an O-ring. The pressing is limited by a hole retaining ring. A lip seal is arranged in the lower groove of the piston rod 104 to divide the upper and lower cavities of the cylinder 1011. Two guide sleeve mounting holes 1012 are provided on the base 101. Two bearings 1021 are arranged in each roller support seat 102, and the two ends of the roller 103 are respectively slidably connected to the roller support seat 102 through the bearings 1021. As shown Figure 4 As shown, the roller 103 is provided with two prisms 1031, and the prisms 1031 are hexagonal. Figure 5 As shown, the upper end surface of the piston rod 104 is a V-shaped surface 1041, and the inner angle of the V-shaped surface 1041 is set to 60 degrees. Driven by the cylinder 1011, the piston rod 104 contacts the edge surface 1031 of the roller 103 through the V-shaped surface 1041.

[0040] When the lower air nozzle joint 106 is ventilated, the lower cavity of the cylinder 1011 is ventilated, the piston rod 104 is lifted up, the V-shaped surface 1041 is pressed against the edge surface 1031, and the rotation of the roller 103 is prevented, so that the chuck claw plays a clamping and fixing role. When the upper air nozzle joint 107 is ventilated, the upper cavity of the cylinder 1011 is ventilated, the piston rod 104 descends, and the roller 103 resumes rotation, realizing the guiding and clamping function of the chuck claw.

[0041] Example 2

[0042] The chuck is provided with four chuck jaws of the second embodiment, and the chuck jaws are arranged in parallel in groups of two.

[0043] Example 3

[0044] The three-chuck pipe cutting machine comprises a C1 chuck 1, a C2 chuck 2, a C3 chuck 3 and a cutting head 4, wherein the C3 chuck is the chuck described in Example 2. The use method of the three-chuck pipe cutting machine can be divided into the following four working conditions:

[0045] The first condition is Figure 6 As shown, the C1 chuck 1, C2 chuck 2 and C3 chuck 3 are all arranged on the left side of the cutting head 4, and the pipe 5 starts to be cut, the C1 chuck 1 axially pushes and pulls the pipe to cut, and the C2 chuck 2 and C3 chuck 3 clamp and guide the pipe;

[0046] The second condition is Figure 7As shown, the C1 chuck 1 and the C2 chuck 2 are arranged on the left side of the cutting head 4 and the C3 chuck 3 is arranged on the right side of the cutting head 4. During the cutting process, the C3 chuck 3 clamps and guides the pipe 5. After the cutting is completed, the C3 chuck 3 axially moves out of the cut pipe 5.

[0047] The third condition is Figure 8 As shown, the C1 chuck 1 and the C2 chuck 2 are arranged on the left side of the cutting head 4, and the C3 chuck 4 is arranged on the right side of the cutting head 3; the C1 chuck 1 pushes and pulls the tube 5 for laser cutting, and the tube 5 is not cut off; during the cutting process, the C2 chuck 2 clamps and guides the tube on the left side of the cutting head 4, and the C3 chuck 3 clamps and guides the tube on the right side of the cutting head, and when the tube 5 is cut off, the claws of the C3 chuck 3 are transformed into clamps to clamp and remove the cut tube 5;

[0048] The fourth working condition is Fig. 9 As shown, the C1 chuck 1 is arranged on the left side of the cutting head 4, and the C2 chuck 2 and the C3 chuck 3 are arranged on the right side of the cutting head 4; during the cutting process, the C1 chuck 1 pushes and pulls the pipe 5 for cutting, the C2 chuck 2 clamps and guides the pipe, and the claws of the C3 chuck 3 turn into a clamp to clamp and fix the pipe 5 for axial movement; after the tail material is cut off, the C2 chuck 2 returns to the left side of the cutting head, and the C3 chuck 3 clamps the pipe for cutting.

[0049] Example 4

[0050] The chuck jaws include a support consisting of a base 101 and two roller support seats 102 and a roller 103 arranged on the support. The base 101 is provided with three piston rods 104 connected by a piston rod connector 105 and three cylinders 1011 for driving the piston rods. The side of the cylinder 1011 is provided with a lower air nozzle joint 106 and an upper air nozzle joint 107. The upper part of the cylinder 1011 is pressed by a sealing gland 108, which is sealed by an O-ring, and the pressing is limited by a hole retaining ring. A lip seal is arranged in the lower groove of the piston rod 104 to divide the upper and lower cavities of the cylinder 1011. Two guide sleeve mounting holes 1012 are provided on the base 101. A bearing 1021 is arranged in each roller support seat 102, and the two ends of the roller 103 are respectively connected to the roller support seat 102 through the bearings 1021. The roller 103 is provided with three prisms 1031, and the prisms 1031 are octagonal. The upper end surface of the piston rod 104 is a V-shaped surface 1041, and the inner angle of the V-shaped surface 1041 is set to 45 degrees. The piston rod 104 contacts the prism 1031 of the roller 103 through the V-shaped surface 1041 under the drive of the cylinder 1011.

[0051] Example 5

[0052] The chuck jaws include a support consisting of a base 101 and two roller support seats 102 and a roller 103 arranged on the support. The base 101 is provided with four piston rods 104 connected by a piston rod connector 105 and four cylinders 1011 for driving the piston rods. The side of the cylinder 1011 is provided with a lower air nozzle joint 106 and an upper air nozzle joint 107. The upper part of the cylinder 1011 is pressed by a sealing gland 108, which is sealed by an O-ring, and the pressing is limited by a hole retaining ring. A lip seal is arranged in the lower groove of the piston rod 104 to divide the upper and lower cavities of the cylinder 1011. Two guide sleeve mounting holes 1012 are provided on the base 101. Three bearings 1021 are arranged in each roller support seat 102, and the two ends of the roller 103 are respectively connected to the roller support seat 102 through the bearings 1021. The roller 103 is provided with four prisms 1031, and the prisms 1031 are 10 prisms. The upper end surface of the piston rod 104 is a V-shaped surface 1041, and the inner angle of the V-shaped surface 1041 is set to 36 degrees. The piston rod 104 contacts the prism 1031 of the roller 103 through the V-shaped surface 1041 under the drive of the cylinder 1011.

[0053] Example 6

[0054] The chuck jaws include a support and a roller 103 disposed on the support, and a piston rod 104 and a cylinder 1011 for driving the piston rod are disposed on the support. An edge surface 1031 is disposed on the roller 103. The upper end surface of the piston rod 104 is a V-shaped surface 1041. The piston rod 104 contacts the edge surface 1031 of the roller 103 through the V-shaped surface 1041 under the drive of the cylinder 1011.

[0055] Example 7

[0056] The chuck jaws include a support and a roller 103 disposed on the support, and two piston rods 104 and two cylinders 1011 for driving the piston rods are disposed on the support. Two edge surfaces 1031 are disposed on the roller 103. The upper end surface of the piston rod 104 is a V-shaped surface 1041. The piston rod 104 contacts the edge surface 1031 of the roller 103 through the V-shaped surface 1041 under the drive of the cylinder 1011.

[0057] Example 8

[0058] The chuck jaws include a support consisting of a base 101 and two roller support seats 102, a roller 103 arranged on the support, two piston rods 104 on the base 101, and two cylinders 1011 for driving the piston rods. Two bearings 1021 are arranged in each roller support seat 102, and the two ends of the roller 103 are respectively connected to the roller support seat 102 in a sliding manner through the bearings 1021. Two prisms 1031 are arranged on the roller 103. The upper end surface of the piston rod 104 is a V-shaped surface 1041. The piston rod 104 contacts the prism 1031 of the roller 103 through the V-shaped surface 1041 under the drive of the cylinder 1011.

[0059] Example 9

[0060] The chuck jaws include a support and a roller 103 arranged on the support. Two piston rods 104 and two cylinders 1011 for driving the piston rods are arranged on the support. The side of the cylinder 1011 is provided with a lower air nozzle joint 106 and an upper air nozzle joint 107. The upper part of the cylinder 1011 is pressed by a sealing gland 108, which is sealed by an O-ring, and the pressing is limited by a hole retaining ring. Two prisms 1031 are arranged on the roller 103. The upper end surface of the piston rod 104 is a V-shaped surface 1041. The piston rod 104 contacts the prism 1031 of the roller 103 through the V-shaped surface 1041 under the drive of the cylinder 1011.

[0061] Example 10

[0062] The chuck jaws include a support and a roller 103 disposed on the support, and the support is provided with two piston rods 104 connected by a piston rod connector 105 and two cylinders 1011 for driving the piston rods. Two prisms 1031 are provided on the roller 103. The upper end surface of the piston rod 104 is a V-shaped surface 1041. The piston rod 104 contacts the prism 1031 of the roller 103 through the V-shaped surface 1041 under the drive of the cylinder 1011.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A chuck jaw, It is characterized in that It includes a support and a roller arranged on the support, wherein one or more edges are arranged on the outer surface of the roller, and one or more piston rods that can contact the edges and a cylinder for driving the piston rod are arranged in the support, and the upper end surface of the piston rod is a V-shaped surface.

2. The chuck jaw according to claim 1, It is characterized in that The support comprises a base and two roller support seats arranged on the base, and the two ends of the roller are respectively slidably connected to the two roller support seats.

3. The chuck jaw according to claim 2, It is characterized in that One or more bearings are arranged inside the roller support seat, and the two ends of the roller are slidably connected to the two roller support seats through the bearings.

4. The chuck jaw according to claim 1, It is characterized in that A sealing gland is arranged on the top of the cylinder, a lower air nozzle joint and an upper air nozzle joint are arranged on the side of the cylinder, a groove is arranged on the lower end surface of the piston rod, and a sealing ring is arranged in the groove.

5. The chuck jaw according to claim 1, It is characterized in that When there are multiple piston rods, the multiple piston rods are connected by a piston rod connecting piece, and axial movement limiting pieces are provided at both ends of the piston rod connecting piece.

6. The chuck jaw according to claim 1, It is characterized in that A guide sleeve mounting hole is provided on the support.

7. The chuck jaw according to claim 1, It is characterized in that The number of edges of the edge face is greater than or equal to six, and the inner angle of the V-shaped face is equal to the inner angle of the edge face.

8. A chuck, It is characterized in that Four chuck jaws according to any one of claims 1 to 8 are provided.

9. A three-chuck pipe cutting machine, It is characterized in that The three-chuck pipe cutting machine comprises a C1 chuck, a C2 chuck, a C3 chuck and a cutting head, and the C2 chuck and / or the C3 chuck are the chucks as described in claim 8.

10. A method for using the three-chuck pipe cutting machine as claimed in claim 9, It is characterized in that At least one of the following steps is included: S1. Set the C1 chuck, C2 chuck and C3 chuck to the left side of the cutting head. The pipe starts to be cut. The C1 chuck pushes and pulls the pipe axially for cutting. The C2 chuck and C3 chuck clamp and guide the pipe. S2, setting the C1 chuck and the C2 chuck on the left side of the cutting head and the C3 chuck on the right side of the cutting head, the C3 chuck clamps and guides the pipe during the cutting process, and the C3 chuck moves axially out of the cut pipe after the cutting is completed; S3, set the C1 chuck and the C2 chuck on the left side of the cutting head, and the C3 chuck on the right side of the cutting head; the C1 chuck pushes and pulls the pipe for laser cutting, and the pipe is not cut; during the cutting process, the C2 chuck clamps and guides the pipe on the left side of the cutting head, and the C3 chuck clamps and guides the pipe on the right side of the cutting head. When the pipe is cut, the C3 chuck moves out the cut pipe; S4. Set the C1 chuck on the left side of the cutting head, and the C2 chuck and C3 chuck on the right side of the cutting head; during the cutting process, the C1 chuck pushes and pulls the pipe to cut, the C2 chuck clamps and guides the pipe, and the C3 chuck clamps and fixes the pipe for axial movement; after the tail material is cut off, the C2 chuck returns to the left side of the cutting head, and the C3 chuck clamps the pipe for unloading.

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