Automatic steel pipe welding machine

Abstract

The utility model discloses an automatic steel pipe welding machine which comprises a material warehouse assembly, a clamping assembly, a feeding assembly and a welding device, the material warehouse assembly comprises two disc material warehouses which are oppositely and rotatably arranged on a machine table, and the clamping assembly comprises two clamp devices which are oppositely and movably arranged on the machine table. The two clamp devices are oppositely provided with two rotatable clamping head structures, the feeding assembly comprises a clamping mechanism arranged between the two disc material warehouses in a reciprocating motion mode, and the two clamping head structures conduct butt welding on the two clamped steel pipe workpieces through the welding device. The whole feeding, clamping and welding processes of the steel pipe welding machine are all automatically operated and controlled, all procedures are reliably coordinated and matched, the control precision is high, the feeding continuity and accuracy are guaranteed, the labor cost is reduced, the product welding quality is guaranteed, the production efficiency is improved, and the production cost is reduced. And the welding requirements of steel pipes with different pipe diameters can be met, and the large-batch production requirement of products is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding machine technical field, concretely relates to an automatic steel pipe welding machine. BACKGROUND

[0002] Steel pipe is a kind of tubular economic steel, according to use, it is divided into conveying pipeline, engineering structure, hot work equipment, petrochemical industry, machinery manufacturing, geological drilling, high pressure equipment steel pipe, and in the production process, for the convenience of production and transportation, it will be kept consistent in length according to the different specifications, so in actual use process, steel pipe is often welded to reach the appropriate application length. For this reason, steel pipe welding machine is usually used to weld steel pipe, and traditional steel pipe welding machine mainly relies on manual operation and simple tooling fixture, and this manual welding mode usually has problems such as low welding efficiency, unstable welding quality, poor connection of the whole welding operation and feeding process, slow work efficiency, greatly affects production, and is not suitable for mass production demand. SUMMARY

[0003] Therefore, the technical problem to be solved by the utility model lies in overcoming the problems that the manual welding mode of the steel pipe in the prior art causes poor connection of welding and feeding process, low welding efficiency, unstable welding quality and is not suitable for mass production demand.

[0004] To solve the above technical problems, the utility model provides an automatic steel pipe welding machine, which comprises:

[0005] A stockroom assembly comprises two disc stockrooms rotatably arranged on a machine table, and a plurality of steel pipe workpieces are loaded on the disc stockrooms;

[0006] A clamping assembly comprises two clamp devices movably arranged on the machine table and located between the two disc stockrooms, and the two clamp devices are oppositely provided with two rotatable chuck structures, and the two chuck structures are used to clamp two steel pipe workpieces to keep coaxial alignment or abutment;

[0007] A feeding assembly comprises a clamping mechanism reciprocally arranged between the two disc stockrooms, and the clamping mechanism is used to feed and load the steel pipe workpieces on the two disc stockrooms into the two chuck structures respectively;

[0008] A welding device is arranged between the two clamp devices and is used to butt weld the two steel pipe workpieces fastened on the two chuck structures.

[0009] As a preferred scheme, the disc stockroom comprises a plurality of positioning rods arranged at intervals in the circumferential direction on the side face thereof, and a plurality of steel pipe workpieces are sleeved on the positioning rods.

[0010] As a preferred scheme, the stockyard assembly comprises two stockyard motors rotatably connecting two disc stockyards, and the two disc stockyards are rotatably arranged at two ends of the machine table in the length direction of the machine table.

[0011] As a preferred scheme, the feeding assembly comprises a feeding slide rail extending and arranged above the two disc stockyards, and a slide block mechanism slidably arranged on the feeding slide rail, the slide block mechanism comprises at least one first movement slide block reciprocally moving along the feeding slide rail, and a second movement slide block slidably connected to the first movement slide block, a moving direction of the second movement slide block is perpendicular to a moving direction of the first movement slide block, and the clamping mechanism is arranged on the second movement slide block.

[0012] As a preferred scheme, the first movement slide block and the second movement slide block are correspondingly arranged in two, and the clamping mechanism comprises two mechanical clamping hands arranged on the two second movement slide blocks, and the two mechanical clamping hands clamp the steel pipe workpiece at the vertex positions of the two disc stockyards.

[0013] As a preferred scheme, the clamping head structure is a rotary clamping chuck rotatably arranged at one end of the clamping device.

[0014] As a preferred scheme, the clamping device is movably arranged on the machine table through a first slide rail structure, the first slide rail structure comprises a first guide slide rail extending and arranged on the machine table in the length direction of the machine table, and a first guide slide block arranged at the bottom of the clamping device, and the first guide slide rail is arranged in the same direction as the feeding slide rail.

[0015] As a preferred scheme, the welding device comprises a welding gun and a multi-directional adjusting assembly, and the welding gun is multi-directionally adjusted and displaced between the two clamping devices through the multi-directional adjusting assembly.

[0016] As a preferred scheme, the multi-directional adjusting assembly comprises a vertical slide table and a horizontal slide table arranged in a cross shape on the machine table, and an adjusting support slidably connected to the horizontal slide table, the vertical slide table and the horizontal slide table are located at one side of the two clamping head structures, and the adjusting support is arranged with the welding gun at one end extending towards the side close to the two clamping head structures.

[0017] As a preferred scheme, the machine table is arranged with a slide table support connected to the vertical slide table, and the multi-directional adjusting assembly further comprises a second guide slide rail extending and arranged on the machine table in the width direction of the machine table, and a second guide slide block arranged at the bottom of the slide table support and slidably matched with the second guide slide rail, and the second guide slide rail extends through between the two clamping devices.

[0018] Compared with the prior art, the technical scheme of the utility model has the following advantages:

[0019] 1. The automatic steel pipe welding machine provided by the utility model, in the intermittent rotation process of the two disc stockyards, the steel pipe workpieces are respectively clamped from the two disc stockyards by the clamping mechanism, and are respectively conveyed and loaded into the chuck structures of the two clamp devices, the two steel pipe workpieces are clamped and kept axially aligned by the two chuck structures, then the two clamp devices drive the relative movement of the two chuck structures, the ends of the two steel pipe workpieces that need to be welded are matched and contacted, finally the butt welding process of the two steel pipe workpieces is carried out by the welding device, the two chuck structures drive the synchronous rotation of the two steel pipe workpieces to complete the welding process, the steel pipe welding position can be welded for one week, the welding is uniform, the steel pipe welding machine adopting the technical scheme realizes the automatic feeding process of the steel pipe workpieces through the cooperation between the two disc stockyards and the feeding assembly, realizes the calibration and positioning of the welding positions of the two steel pipe workpieces through the two clamp devices, ensures the positioning accuracy of the butt welding openings of the two steel pipe workpieces, the feeding, clamping and welding processes are all realized automatically, the coordination between the processes is reliable, the control precision is high, the continuity and accuracy of feeding are ensured, the stability and reliability of steel pipe welding are improved, the labor cost is reduced, the product welding quality is ensured and the production efficiency is improved, the steel pipe welding requirements of different pipe diameters can be met, and the steel pipe welding machine is suitable for large-batch production requirements.

[0020] 2. The automatic steel pipe welding machine provided by the utility model, the disc stockyard comprises a plurality of positioning rods which are arranged on the side face in the circumferential direction at intervals, so that a plurality of steel pipe workpieces are sleeved on the positioning rods when being fed, and the plurality of steel pipe workpieces are sequentially sent to the positions that can be grabbed by the clamping mechanism when the disc stockyard rotates, reliable connection between the disc stockyard and the feeding assembly is realized, so that the steel pipe workpieces on the disc stockyard are sequentially conveyed to the clamp devices by the clamping mechanism to realize positioning and clamping and then welding, and the continuity and accuracy of feeding are ensured.

[0021] 3. The automatic steel pipe welding machine provided by the utility model, the feeding assembly comprises a feeding slide rail, a first movement sliding block, a second movement sliding block and a mechanical gripper, the mechanical gripper moves in the horizontal direction between the two disc stockyards along the feeding slide rail through the first movement sliding block, and when the mechanical gripper moves above the disc stockyard, the mechanical gripper moves in the vertical direction relative to the first movement sliding block through the second movement sliding block, so that the mechanical gripper takes out the steel pipe workpieces on the disc stockyard and conveys the steel pipe workpieces to the chuck structure, the mechanical gripper realizes the whole feeding process of the steel pipe workpieces through the sliding cooperation of the first movement sliding block and the first movement sliding block, so that the feeding distance between the disc stockyard and the chuck structure is well adapted, the cooperation is reliable, the operation is accurate and stable, and the work efficiency is improved.

[0022] 4. The utility model provides an automatic steel pipe welding machine, according and chuck structure is composed of chuck pivot and chuck chuck, can reliably clamp the steel pipe workpiece of feeding over through chuck chuck, prevent the loosening condition of steel pipe workpiece in the welding process, guarantee the coaxial degree of two steel pipe workpieces through the clamping positioning of two steel pipe workpieces, ensure the accuracy of welding position, so as to carry out the welding operation subsequently.

[0023] 5. The utility model provides an automatic steel pipe welding machine, and the cooperation of vertical sliding table and horizontal sliding table can carry out up and down and left and right displacement adjustment between two clamp devices, and the cooperation of second guide sliding rail and second guide sliding block can adjust the position along the width direction of machine table, namely realizes the front and back displacement adjustment of welding torch between two clamp devices, and this structure sets up, and the welding torch carries out multidirectional displacement adjustment between two clamp devices through multidirectional adjustment assembly, so this can be well adjusted to the welding position of two steel pipe workpieces, so can better satisfy the welding torch for the steel pipe welding use of different pipe diameter, length, and the adaptation range is wide, and the adjustment is convenient to use. DRAWINGS

[0024] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or the prior art description will be briefly introduced below.

[0025] Figure 1 It is the three-dimensional structure schematic diagram of the automatic steel pipe welding machine of the utility model,

[0026] Figure 2 It is the front view of the automatic steel pipe welding machine of the utility model,

[0027] Figure 3 It is the side view of the automatic steel pipe welding machine of the utility model,

[0028] Figure 4 It is the auxiliary view of the automatic steel pipe welding machine of the utility model.

[0029] Explanations of the drawings: 1, disc warehouse;11, positioning rod;12, warehouse motor;2, clamp device;21, chuck structure;22, first guide sliding rail;23, first guide sliding block;3, clamp mechanism;4, feeding sliding rail;5, first movement sliding block;6, second movement sliding block;7, welding device;71, welding torch;72, vertical sliding table;73, horizontal sliding table;74, adjustment support;75, sliding table support;76, second guide sliding rail;77, second guide sliding block;8, machine table. Specific embodiment

[0030] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0031] In the description of this utility model, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0033] Example

[0034] The following is a detailed description of this embodiment with reference to the accompanying drawings:

[0035] This embodiment provides, as follows: Figures 1-4 An automated steel pipe welding machine is shown, comprising:

[0036] The material storage assembly includes two disc material storage boxes 1 that are rotatably mounted on the machine base 8, and the disc material storage boxes 1 are loaded with a number of steel pipe workpieces.

[0037] The clamping assembly includes two clamping devices 2 that are relatively movable on the machine base 8 and located between two disc hoppers 1. The two clamping devices 2 are provided with two rotatable chuck structures 21 that are arranged opposite to each other. The two chuck structures 21 are used to clamp two steel pipe workpieces to keep them coaxially aligned or abutting each other.

[0038] The feeding assembly includes a clamping mechanism 3 that is reciprocating between two disc hoppers 1. The clamping mechanism 3 is used to feed the steel pipe workpieces on the two disc hoppers 1 into the two clamping structures 21 respectively. The two clamping devices 2 move relative to each other after the two clamping structures 21 clamp the steel pipe workpieces respectively, so that the two clamping structures 21 drive the two steel pipe workpieces to engage and contact (A in the figure represents the steel pipe workpiece).

[0039] Welding device 7, set between two clamping devices 2, is used to butt weld two steel pipe workpieces fastened to two clamping structures 21.

[0040] The above embodiment is the core technical solution of the present embodiment. During intermittent rotation of the two disc material libraries 1, the clamping mechanisms 3 clamp steel pipe workpieces from the two disc material libraries 1 respectively and convey and load them into the chuck structures 21 of the two clamp devices 2. The two chuck structures 21 clamp and hold the two steel pipe workpieces in axial alignment. Then the two clamp devices 2 drive the two chuck structures 21 to move relatively, so that the ends of the two steel pipe workpieces that need to be welded are in contact. Finally, the two steel pipe workpieces are butt welded by the welding device 7. The two chuck structures 21 drive the two steel pipe workpieces to rotate synchronously to complete the welding process, which can better weld the steel pipe for one turn, ensuring uniform welding. The steel pipe welding machine using the technical solution can realize automatic feeding of the steel pipe workpieces through cooperation between the two disc material libraries 1 and the feeding assembly, and can realize calibration and positioning of the welding positions of the two steel pipe workpieces through the two clamp devices 2, so as to ensure the positioning accuracy of the butt welding of the two steel pipe workpieces. The feeding, clamping and welding processes are all automatically controlled, the coordination between the processes is reliable, the control accuracy is high, the continuity and accuracy of feeding are ensured, the stability and reliability of steel pipe welding are improved, the labor cost is reduced, the product welding quality is ensured, the production efficiency is improved, the steel pipe welding requirements of different pipe diameters can be met, and the product can be mass produced.

[0041] The specific setting mode of the material library assembly will be described in detail below. Figures 1-3 The specific setting mode of the material library assembly will be described in detail below.

[0042] The material library assembly comprises two material library motors 12 that rotate two disc material libraries 1. The two disc material libraries 1 are rotatably arranged at the two ends of the length direction of the machine table 8 by the two material library motors 12. The disc material library 1 rotates intermittently under the drive of the material library motor 12. The disc material library 1 comprises a plurality of positioning rods 11 arranged at the side surface in the circumferential direction. A plurality of steel pipe workpieces are sleeved on the positioning rods 11. This structure allows a plurality of steel pipe workpieces to be sleeved on the positioning rods 11 during feeding. When the disc material library 1 rotates, the steel pipe workpieces are sequentially sent to a position that can be grabbed by the clamping mechanism 3, thereby realizing reliable connection between the disc material library 1 and the feeding assembly. Then the steel pipe workpieces on the disc material library 1 are sequentially conveyed to the clamp device 2 by the clamping mechanism 3 for positioning and clamping before welding, thereby ensuring the continuity and accuracy of feeding.

[0043] The specific setting mode of the material library assembly will be described in detail below. Figures 1-3 The specific setting mode of the material library assembly will be described in detail below.

[0044] The feeding assembly comprises a feeding slide rail 4 extending above the two disc storages 1, and a sliding block mechanism slidingly arranged on the feeding slide rail 4, the sliding block mechanism comprises at least one first moving sliding block 5 reciprocating along the feeding slide rail 4, and a second moving sliding block 6 slidingly connected to the first moving sliding block 5, the moving direction of the second moving sliding block 6 is perpendicular to the moving direction of the first moving sliding block 5, the clamping mechanism 3 is arranged on the second moving sliding block 6, the feeding slide rail 4 is arranged in a length direction of the machine table 8 and has a certain length, the first moving sliding block 5 has an L-shaped structure and is provided with a slide rail slidingly connecting the second moving sliding block 6, the first moving sliding block 5 and the second moving sliding block 6 are respectively driven by a cylinder to move, and further preferably, two first moving sliding blocks and two second moving sliding blocks are respectively arranged, the clamping mechanism 3 comprises two mechanical clamping hands arranged on the two second moving sliding blocks, the two mechanical clamping hands respectively clamp the steel pipe workpieces at the top positions of the two disc storages 1, and the two mechanical clamping hands respectively convey the steel pipe workpieces on the two disc storages 1 to the two chuck structures 21. As can be seen from the above structure, the mechanical clamping hands are horizontally displaced between the two disc storages 1 along the feeding slide rail 4 through the first moving sliding block 5, and when the mechanical clamping hands move above the disc storages 1, the mechanical clamping hands are vertically displaced relative to the first moving sliding block 5 through the second moving sliding block 6, so as to achieve the purpose of clamping the steel pipe workpieces from the disc storages 1 for feeding. The mechanical clamping hands realize the whole feeding process of the steel pipe workpieces through the sliding cooperation of the first moving sliding block 5 and the first moving sliding block 5, so as to well adapt to the feeding distance between the disc storages 1 and the chuck structures 21, and the cooperation is reliable, the operation is accurate and stable, and the work efficiency is improved.

[0045] The specific arrangement of the clamping assembly will be described in detail below. Figures 1-4 The specific arrangement of the clamping assembly will be described in detail below.

[0046] The clamp device 2 is movably arranged on the machine table 8 through the first slide rail structure, the first slide rail structure comprises a first guide slide rail 22 extending along the length direction of the machine table 8 and arranged on the machine table 8, and a first guide sliding block 23 arranged at the bottom of the clamp device 2, the first guide slide rail 22 is arranged in the same direction as the feeding slide rail 4, and the two clamp devices 2 are relatively moved on the machine table 8 through the first slide rail structure, so that the two chuck structures 21 drive the two steel pipe workpieces to approach each other for welding operation, or after the welding is completed, the two chuck structures 21 drive the two steel pipe workpieces to move away from each other, then the chuck structures 21 are loosened, and the steel pipe products after welding can be taken out from the chuck structures 21. The discharging mode of the welding machine can adopt a discharging mechanical hand to move and place the welded steel pipe products into a discharging box.

[0047] As a preferred embodiment, the chuck structure 21 is a rotary chucking chuck rotatably arranged at one end of the clamp device 2, which comprises a rotatably arranged chuck shaft and a chucking chuck arranged on the chuck shaft, which can be in the form of a hydraulic chuck or an elastic chuck. With this arrangement, the chucking chuck can reliably clamp the steel pipe workpiece fed to prevent loosening of the steel pipe workpiece during welding, and the clamping and positioning of the two steel pipe workpieces can ensure the coaxiality of the two steel pipe workpieces during welding, ensuring the accuracy of the welding position and thus ensuring the welding quality of the product.

[0048] The specific arrangement of the welding device will be described in detail below. Figures 1-4 The specific arrangement of the welding device will be described in detail below.

[0049] The welding device 7 comprises a welding torch 71 and a multi-directional adjusting assembly. The welding torch 71 is adjusted in multi-directional displacement between the two clamp devices 2 through the multi-directional adjusting assembly, which can better meet the welding requirements of steel pipes of different diameters and lengths.

[0050] As a specific structure, the multi-directional adjusting assembly comprises a vertical sliding table 72 and a horizontal sliding table 73 arranged in a cross shape on a machine table 8, and an adjusting bracket 74 slidably connected to the horizontal sliding table 73. The vertical sliding table 72 and the horizontal sliding table 73 are located on one side of the two chuck structures 21, and the adjusting bracket 74 extends to one end near the two chuck structures 21, and the welding torch 71 is arranged on the end. The machine table 8 is provided with a sliding table bracket 75 connected to the vertical sliding table 72. The multi-directional adjusting assembly further comprises a second guide sliding rail 76 arranged on the machine table 8 in the width direction of the machine table, and a second guide sliding block 77 arranged at the bottom of the sliding table bracket 75 and slidably connected to the second guide sliding rail 76. The second guide sliding rail 76 extends through between the two clamp devices 2. The second guide sliding rail 76 and the second guide sliding block 77 are connected to form a second sliding rail structure that slides with the sliding table bracket 75. The sliding table bracket 75 is driven by a pneumatic cylinder to realize displacement through the second sliding rail structure. With this arrangement, the welding torch 71 can be adjusted in up-down and left-right displacement between the two clamp devices 2 through the cooperation of the vertical sliding table 72 and the horizontal sliding table 73, and the position can be adjusted in the width direction of the machine table through the cooperation of the second guide sliding rail 76 and the second guide sliding block 77, i.e. the welding torch 71 can be adjusted in front-back displacement between the two clamp devices 2. With this arrangement, the welding torch 71 can be adjusted to the welding position of the two steel pipe workpieces, which can better meet the welding requirements of the welding torch for steel pipes of different diameters and lengths, and has a wide range of application and is easy to adjust and use.

[0051] Obviously, the above embodiments are only examples for clearly illustrating the present application and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be enumerated. The changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An automated steel pipe welding machine characterized by, The utility model relates to a kind of steel pipe welding machine, including: A stock component, including two disc stock (1) of opposite rotation setting on machine table (8), the disc stock (1) is loaded with several steel pipe workpieces; Clamping assembly, including two clamp devices (2) of opposite movement setting on machine table (8) and being located between two disc stock (1), two clamp devices (2) are oppositely provided with rotatable two chuck structures (21), and two chuck structures (21) are used to clamp two steel pipe workpieces and keep coaxial alignment or abutment; Feeding assembly, including reciprocating motion clamping mechanism (3) setting between two disc stock (1), and the clamping mechanism (3) is used to respectively transport and load two disc stock (1) on steel pipe workpiece into two chuck structures (21); Welding device (7) is arranged between two clamp devices (2) for butt welding of two steel pipe workpieces fastened on two chuck structures (21).

2. The automated steel tube welder of claim 1, wherein: The disc stock (1) includes a plurality of positioning rods (11) arranged at intervals in the circumferential direction on the side thereof, and a plurality of steel pipe workpieces are sleeved on the plurality of positioning rods (11).

3. The automated steel tube welder of claim 2, wherein: The stock component includes two stock motors (12) for rotatingly connecting the two disc stock (1), and the two disc stock (1) are respectively rotatably arranged at the two ends of the length direction of the machine table (8) by the two stock motors (12).

4. The automated steel tube welder of claim 1, wherein: The feeding assembly includes a feeding slide rail (4) extending above the two disc stock (1), and a sliding block mechanism slidingly arranged on the feeding slide rail (4), the sliding block mechanism includes at least one first moving sliding block (5) reciprocating along the feeding slide rail (4), and a second moving sliding block (6) slidingly connected to the first moving sliding block (5), the moving direction of the second moving sliding block (6) is perpendicular to the moving direction of the first moving sliding block (5), and the clamping mechanism (3) is arranged on the second moving sliding block (6).

5. The automated steel tube welder of claim 4, wherein: The first moving sliding block and the second moving sliding block are respectively provided with two, and the clamping mechanism (3) includes two mechanical clamping hands arranged on the two second moving sliding blocks, and the two mechanical clamping hands respectively clamp the steel pipe workpieces at the vertex positions of the two disc stock (1).

6. The automated steel tube welder of claim 1, wherein: The chuck structure (21) is a rotary clamping chuck rotatably arranged at one end of the clamp device (2).

7. The automated steel tube welder of claim 6, wherein: The clamp device (2) is movably arranged on the machine table (8) through a first slide rail structure, the first slide rail structure includes a first guide slide rail (22) extending along the length direction of the machine table (8) and arranged on the machine table (8), and a first guide sliding block (23) arranged at the bottom of the clamp device (2), and the first guide slide rail (22) is arranged in the same direction with the feeding slide rail (4).

8. The automated steel tube welder of claim 1, wherein: The welding device (7) includes a welding gun (71) and a multi-directional adjusting assembly, and the welding gun (71) is multi-directionally displaced and adjusted between the two clamp devices (2) through the multi-directional adjusting assembly.

9. The automated steel tube welder of claim 8, wherein: The multi-directional adjusting assembly comprises a vertical sliding table (72) and a horizontal sliding table (73) arranged in cross connection on a machine table (8), and an adjusting support (74) slidingly connected to the horizontal sliding table (73), the vertical sliding table (72) and the horizontal sliding table (73) are located on one side of the two chuck structures (21), and the adjusting support (74) is provided with the welding torch (71) on an end extending towards the side close to the two chuck structures (21).

10. The automated steel tube welder of claim 9, wherein: The machine table (8) is provided with a sliding table support (75) connected to the vertical sliding table (72), and the multi-directional adjusting assembly further comprises a second guide sliding rail (76) arranged on the machine table (8) and extending in the width direction of the machine table (8), and a second guide sliding block (77) arranged at the bottom of the sliding table support (75) and slidingly matched with the second guide sliding rail (76), and the second guide sliding rail (76) extends through between the two chuck devices (2).

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