Welding device for part machining

Abstract

The utility model belongs to the technical field of welding, and particularly relates to a welding device for part machining, which comprises a workbench, a placing table is arranged above the workbench, the placing table is connected with a lifting part, a first moving part is arranged on one side of the placing table, the first moving part is connected with a second moving part, and the second moving part is connected with a third moving part. A welding gun is arranged on the third moving part; a fixed part is arranged above the workbench, the fixed part comprises a first fixed support and a rotating part arranged on the first fixed support, the rotating part is connected with a telescopic part, and the telescopic part, the rotating part, the lifting part, the first moving part, the second moving part and the third moving part are all connected with a control system; according to the welding device, through mutual cooperation of the moving part, the fixed part, the control system and other parts, the working intensity and the danger coefficient of manual operation are greatly reduced, adjustment can be conducted according to the shapes and the sizes of different parts, and then efficient and accurate welding of the parts is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of welding technology, and specifically relates to a welding device for processing parts. Background Technology

[0002] In modern industrial manufacturing, welding of components is one of the key processes for joining different materials or components, and it is widely used in many industries such as automobile manufacturing, aerospace, electronic equipment, and heavy machinery. Traditional welding methods, such as manual arc welding and gas shielded welding, while technically mature and widely applied, often suffer from low welding efficiency, large heat-affected zones, and difficulty in controlling weld quality when processing high-precision, complex components. Especially for thin-plate materials or assembly parts requiring high precision, traditional welding methods are prone to deformation, cracks, and residual stress, affecting the overall performance and reliability of the product.

[0003] However, during the welding process, many parts have double or complex shapes, requiring alignment of two or more sides for welding. In traditional welding operations, this usually requires manual flipping of the workpiece, which not only increases the complexity and time cost of the operation, but may also lead to inaccurate welding positions and a decline in welding quality. In addition, manual flipping increases the labor intensity of workers, reduces production efficiency, and may pose safety hazards. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a welding device for parts processing, which solves the problems of increased time cost, inaccurate welding position, reduced welding quality and low production efficiency caused by the need for manual flipping of existing welding devices.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A welding apparatus for processing parts is provided, including a worktable, a placement platform above the worktable, the placement platform being connected to a lifting unit, a first moving part being provided on one side of the placement platform, the first moving part being connected to a second moving part, the second moving part being connected to a third moving part, and a welding torch being provided on the third moving part; a fixing part being provided above the worktable, and the fixing part being provided on both sides of the placement platform; the fixing part includes a first fixed bracket and a rotating part provided on the first fixed bracket, the rotating part being connected to a telescopic part, and the telescopic part, the rotating part, the lifting part, the first moving part, the second moving part, and the third moving part are all connected to a control system.

[0007] The beneficial effects of adopting the above technical solution are as follows: This welding device, through the cooperation of its moving parts, fixed parts, and control system, not only greatly reduces the labor intensity and risk factor of manual operation, but also allows for adjustment according to the shape and size of different parts, thereby achieving efficient and precise welding of the parts. Specifically, the worktable provides a stable mounting base for other structural components, the placement platform is used to place the parts to be welded, and the placement platform is connected to the lifting part, enabling the parts to move up and down, facilitating the picking and placing of parts and aiding in their fixation. The fixed parts located on both sides of the placement platform, through the combined use of the rotating and telescopic parts, allow for adjustment of the position and angle of the parts, facilitating welding operations by the welding torch. Simultaneously, the first, second, and third moving parts together form a structural assembly that drives the welding torch, allowing adjustment of the welding position to accommodate parts of different shapes and sizes, effectively improving welding efficiency and quality.

[0008] Furthermore, the first moving part includes a first slide rail and a second slide rail, which are arranged in parallel. A first slider is provided on the first slide rail and the second slide rail. A second fixed base plate is provided on the upper end of the first slider. A second drive motor and a first reducer are provided on the second fixed base plate. The first reducer is connected to the second drive motor. The output end of the first reducer is connected to one end of a rotating shaft. A gear is provided at the other end of the rotating shaft. The gear meshes with a rack. The rack is located on the inner side of the first slide rail.

[0009] The beneficial effects of adopting the above technical solution are as follows: the second drive motor and the first reducer are fixed on the second fixed base plate. The second drive motor drives the gear to rotate through the first reducer and the rotating shaft. The gear meshes with the rack, and the rack converts the rotational motion into linear motion, which drives the second moving part, the third moving part and the welding gun located on the second fixed base plate to move. The parallel arrangement of the first slide rail and the second slide rail can ensure the stability during movement and avoid deviation or shaking, thereby ensuring the accuracy of welding.

[0010] Furthermore, the second moving part includes a third slide rail and a fourth slide rail arranged in parallel. A second slider is provided on the third slide rail and the fourth slide rail. A first lead screw is provided between the third slide rail and the fourth slide rail. One end of the first lead screw is connected to a second reducer. The second reducer is connected to a third drive motor. The first lead screw, the third slide rail, and the fourth slide rail are all provided on a second fixed bracket. The second fixed bracket is connected to a second fixed base plate. A first ball nut is provided on the first lead screw. The first ball nut and the second slider are connected to the third fixed base plate. The third fixed base plate is connected to the third moving part.

[0011] The beneficial effects of adopting the above technical solution are as follows: the second moving part is fixed on the second fixed base plate by the second fixed bracket to realize the adjustment of the welding gun height. The third drive motor drives the first lead screw to rotate through the second reducer to realize the transmission of power and the adjustment of speed and torque. When the first lead screw rotates, the first ball nut moves linearly along the first lead screw, driving the third moving part fixed on the third fixed base plate to move. The third slide rail and the fourth slide rail can provide a stable moving track, ensuring the linearity and stability during the movement.

[0012] Furthermore, the third moving part includes a fifth slide rail and a sixth slide rail arranged in parallel. A third slider is provided on the fifth slide rail and the sixth slide rail. A second lead screw is provided between the fifth slide rail and the sixth slide rail. One end of the second lead screw is connected to a third reducer. The third reducer is connected to a fourth drive motor. The second lead screw, the fifth slide rail, and the sixth slide rail are all provided on a third fixed bracket. The third fixed bracket is connected to a third fixed base plate. A second ball nut is provided on the second lead screw. The second ball nut and the third slider are connected to a fourth fixed base plate. The fourth fixed base plate is connected to a welding torch.

[0013] The beneficial effects of adopting the above technical solution are as follows: the third moving part is connected to the second moving part through the third fixed bracket; the fourth drive motor can drive the second lead screw to rotate through the third reducer; when the second lead screw rotates, the second ball nut will move linearly along the second lead screw; the fifth slide rail and the sixth slide rail can ensure the stability and accuracy during the movement process, thereby ensuring the stability and reliability of the welding torch during the movement and welding process, and facilitating the adjustment of the welding torch position in the horizontal direction to adapt to parts of different shapes and sizes.

[0014] Furthermore, the telescopic part includes a first drive motor, a first telescopic rod, and a fixing plate. The fixing plate is connected to the first telescopic rod, and the first telescopic rod is connected to the output end of the first drive motor. The first drive motor is mounted on the first fixed base plate. The rotating part includes a rotating motor and a rotating rod connected to the rotating motor. The rotating rod is connected to the first fixed base plate.

[0015] The beneficial effects of adopting the above technical solution are as follows: Under the drive of the first drive motor, the first telescopic rod can move telescopically along the axis of the first telescopic rod, thereby realizing the position adjustment of the fixing plate to adapt to the fixing of parts of different sizes. After the parts are welded and fixed, the rotating rod can be driven by the rotary motor to rotate, thereby driving the telescopic part and the fixed parts to rotate, so as to realize the adjustment of the angle of the parts and the adjustment of the welding surface and welding angle of the parts.

[0016] Furthermore, the fixing plate is arc-shaped or rectangular, and a buffer pad is provided on the inner side of the fixing plate.

[0017] The beneficial effects of adopting the above technical solution are as follows: by setting the fixing plate to an arc shape, it can be adapted to the fixing of parts with curved or arc-shaped structures. The rectangular fixing plate can be used for parts with flat or straight edges to ensure the fixing stability of the parts during the welding process. The buffer pad can further ensure the fixing stability, avoid shaking or displacement during welding, and improve the accuracy and quality of welding.

[0018] Furthermore, the lifting unit includes a lifting cylinder, and the output end of the lifting cylinder is provided with a piston rod, which is connected to the placement platform.

[0019] The beneficial effects of adopting the above technical solution are as follows: the lifting unit, through the cooperation between the lifting cylinder and the piston rod, can accurately control the up and down movement of the placement platform, which is not conducive to the picking and placing of parts, and can also ensure that the parts reach the designated welding position, thereby improving the accuracy and quality of welding.

[0020] Furthermore, a guide rod is provided between the placement platform and the worktable. The guide rod is located inside the guide sleeve, which is located on the worktable.

[0021] The beneficial effects of adopting the above technical solution are as follows: the guide rod and guide sleeve can ensure the stability and accuracy of the placement platform during the lifting process, thereby ensuring the accuracy and quality of welding.

[0022] In summary, the welding device for parts processing provided by this utility model has the following advantages:

[0023] (1) The welding device achieves efficient and precise welding of parts through the cooperation of the moving part, the fixed part, the lifting part and the control system. It not only greatly reduces the labor intensity and risk factor of manual operation, but also can be adjusted according to the shape and size of different parts to achieve accurate and efficient welding of parts, which greatly improves welding efficiency and precision.

[0024] (2) The moving part includes a first moving part, a second moving part and a third moving part. The position of the welding gun can be adjusted in three directions through the first moving part, the second moving part and the third moving part. This not only helps to reduce welding errors and improve welding efficiency and quality, but also adapts to the welding needs of parts of different shapes and sizes, and has better practicality and economic benefits.

[0025] (3) The telescopic part includes a first drive motor, a first telescopic rod and a fixing plate. The first telescopic rod can move along its axis under the drive of the first drive motor, which allows the position of the fixing plate to be flexibly adjusted to meet the fixing requirements of parts of different sizes. By adjusting the length of the first telescopic rod, it can be ensured that the fixing plate fits tightly against the parts, providing stable support and fixing.

[0026] (4) The rotating part includes a rotary motor and a rotating rod connected to the rotary motor. Driven by the rotary motor, the rotating rod and the telescopic part and the fixed plate connected to it can rotate. This makes it easy to adjust the angle of the parts during the welding process. It can not only adapt to different welding requirements, but also avoid the problems of low efficiency and high risk caused by manual flipping.

[0027] (5) The lifting part includes a lifting cylinder. The output end of the lifting cylinder is equipped with a piston rod, which is connected to the placement platform. Driven by the lifting cylinder, the placement platform can move up and down, which facilitates the picking and placing and fixing of parts. At the same time, the lifting part can also ensure that the parts reach the designated welding position, which improves the accuracy and quality of welding. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a partial structural diagram of the first moving part in this utility model;

[0030] Figure 3 This is a partial structural diagram of the second and third moving parts in this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the fixing part and the lifting part in this utility model;

[0032] The components include: 1. Workbench; 2. Placement platform; 3. Lifting unit; 31. Lifting cylinder; 32. Piston rod; 33. Guide rod; 34. Guide sleeve; 4. First moving part; 41. First slide rail; 42. Second slide rail; 43. First slider; 44. Second fixed base plate; 45. Second drive motor; 46. First reducer; 47. Gear; 48. Rack; 5. Second moving part; 51. Third slide rail; 52. Fourth slide rail; 53. First lead screw; 54. Second reducer; 55. Third drive... 56. Second fixed bracket; 57. Second slider; 6. Third moving part; 61. Fifth slide rail; 62. Sixth slide rail; 63. Second lead screw; 64. Third reducer; 65. Fourth drive motor; 66. Fourth fixed base plate; 67. Third fixed bracket; 7. Welding torch; 8. Rotating part; 81. Rotating motor; 82. Rotating rod; 9. Telescopic part; 91. First drive motor; 92. First telescopic rod; 93. Fixed plate; 94. First fixed base plate; 10. First fixed bracket. Detailed Implementation

[0033] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0034] like Figures 1-4 As shown, the welding device for parts processing provided by this utility model includes a workbench 1, a placement platform 2 above the workbench 1, the placement platform 2 being connected to a lifting part 3, a first moving part 4 being provided on one side of the placement platform 2, the first moving part 4 being connected to a second moving part 5, the second moving part 5 being connected to a third moving part 6, and a welding torch 7 being provided on the third moving part 6; a fixing part is provided above the workbench 1, and the fixing part is provided on both sides of the placement platform 2; the fixing part includes a first fixing bracket 10 and a rotating part 8 provided on the first fixing bracket 10, the rotating part 8 being connected to a telescopic part 9, and the telescopic part 9, the rotating part 8, the lifting part 3, the first moving part 4, the second moving part 5 and the third moving part 6 are all connected to a control system.

[0035] In use, the parts are first placed on the placement platform 2. The placement platform 2 moves up and down via the lifting part 3 to ensure that the parts reach the designated welding position during the welding process. The fixing parts on both sides of the placement platform 2, through the cooperation of the rotating part 8 and the telescopic part 9, adjust the position and angle of the parts to adapt to the fixing of parts of different sizes and welding requirements, ensuring the stability of the parts during the welding process. After the parts are fixed, the welding torch 7, through the cooperation of the first moving part 4, the second moving part 5 and the third moving part 6, can move and adjust the position of the welding torch 7 to adapt to different welding requirements, and can also adjust the welding trajectory and welding speed to achieve efficient and precise welding of parts, effectively improving welding efficiency and quality.

[0036] like Figure 1 and Figure 2As shown, the first moving part 4 includes a first slide rail 41 and a second slide rail 42, which are arranged in parallel. A first slider 43 is provided on the first slide rail 41 and the second slide rail 42. A second fixed base plate 44 is provided on the upper end of the first slider 43. A second drive motor 45 and a first reducer 46 are provided on the second fixed base plate 44. The first reducer 46 is connected to the second drive motor 45. The output end of the first reducer 46 is connected to one end of a rotating shaft. A gear 47 is provided at the other end of the rotating shaft. The gear 47 meshes with a rack 48. 48 is disposed on the inner side of the first slide rail 41; the second drive motor 45 and the first reducer 46 are fixed on the second fixed base plate 44. The second drive motor 45 drives the gear 47 to rotate through the first reducer 46 and the rotating shaft. The gear 47 meshes with the rack 48, and the rack 48 converts the rotational motion into linear motion, driving the second moving part 5, the third moving part 6 and the welding torch 7 located on the second fixed base plate 44 to move. The parallel arrangement of the first slide rail 41 and the second slide rail 42 can ensure the stability during movement and avoid deviation or shaking, thereby ensuring the accuracy of welding.

[0037] like Figure 1 and Figure 3 As shown, the second moving part 5 includes a third slide rail 51 and a fourth slide rail 52 arranged in parallel. A second slider 57 is provided on the third slide rail 51 and the fourth slide rail 52. A first lead screw 53 is provided between the third slide rail 51 and the fourth slide rail 52. One end of the first lead screw 53 is connected to a second reducer 54, and the second reducer 54 is connected to a third drive motor 55. The first lead screw 53, the third slide rail 51, and the fourth slide rail 52 are all provided on a second fixed bracket 56, which is connected to a second fixed base plate 44. A first ball nut is provided on the first lead screw 53. The first ball nut and the second slider 57 are connected to the third slide rail 51 and the fourth slide rail 52. The fixed base plate is connected to the third fixed base plate and the third moving part 6; the second moving part 5 is fixed to the second fixed base plate 44 by the second fixed bracket 56 to realize the adjustment of the height of the welding gun 7. The third drive motor 55 drives the first lead screw 53 to rotate through the second reducer 54 to realize the transmission of power and the adjustment of speed and torque. When the first lead screw 53 rotates, the first ball nut moves linearly along the first lead screw 53, driving the third moving part 6 fixed to the third fixed base plate to move. The third slide rail 51 and the fourth slide rail 52 can provide a stable moving track to ensure the linearity and stability during the movement.

[0038] like Figure 1 and Figure 3As shown, the third moving part 6 includes a fifth slide rail 61 and a sixth slide rail 62 arranged in parallel. A third slider is provided on the fifth slide rail 61 and the sixth slide rail 62. A second lead screw 63 is provided between the fifth slide rail 61 and the sixth slide rail 62. One end of the second lead screw 63 is connected to a third reducer 64. The third reducer 64 is connected to a fourth drive motor 65. The second lead screw 63, the fifth slide rail 61 and the sixth slide rail 62 are all provided on a third fixed bracket 67. The third fixed bracket 67 is connected to a third fixed base plate. A second ball nut is provided on the second lead screw 63. The second ball nut and the third slider are connected to a fourth fixed base plate 66. The fourth fixed base plate 66 is connected to the welding torch 7. The third moving part 6 is connected to the second moving part 5 via the third fixed bracket 67. The fourth drive motor 65 can drive the second lead screw 63 to rotate via the third reducer 64. When the second lead screw 63 rotates, the second ball nut will move linearly along the second lead screw 63. The fifth slide rail 61 and the sixth slide rail 62 can ensure the stability and accuracy during the movement process, thereby ensuring the stability and reliability of the welding torch 7 during the movement and welding process, and facilitating the adjustment of the horizontal position of the welding torch 7 to adapt to parts of different shapes and sizes.

[0039] like Figure 1 and Figure 4 As shown, the telescopic part 9 includes a first drive motor 91, a first telescopic rod 92, and a fixing plate 93. The fixing plate 93 is connected to the first telescopic rod 92, and the first telescopic rod 92 is connected to the output end of the first drive motor 91. The first drive motor 91 is mounted on the first fixed base plate 94. The rotating part 8 includes a rotary motor 81 and a rotating rod 82 connected to the rotary motor 81. The rotating rod 82 is connected to the first fixed base plate 94. Under the drive of the first drive motor 91, the first telescopic rod 92 can extend and retract along the axial direction of the first telescopic rod 92, thereby adjusting the position of the fixing plate 93 to accommodate the fixing of parts of different sizes. After the parts are welded and fixed, the rotary motor 81 can drive the rotating rod 82 to rotate, thereby rotating the telescopic part 9 and the fixed parts to adjust the angle of the parts, achieving adjustment of the welding surface and welding angle of the parts. In addition,

[0040] The fixing plate 93 is arc-shaped or rectangular, and a buffer pad is provided on the inner side of the fixing plate 93. By setting the fixing plate 93 to arc shape, it can be adapted to the fixing of parts with curved or arc-shaped structures. The rectangular fixing plate 93 can be used for parts with flat or straight edges to ensure the fixing stability of the parts during the welding process. The buffer pad is made of high temperature resistant rubber material, which can further ensure the fixing stability, avoid shaking or displacement during welding, and improve the accuracy and quality of welding.

[0041] like Figure 1 and Figure 4As shown, the lifting unit 3 includes a lifting cylinder 31, and a piston rod 32 is provided at the output end of the lifting cylinder 31. The piston rod 32 is connected to the placement platform 2. Through the cooperation between the lifting cylinder 31 and the piston rod 32, the lifting unit 3 can precisely control the up and down movement of the placement platform 2, which not only facilitates the picking and placing of parts, but also ensures that the parts reach the designated welding position, thereby improving the accuracy and quality of welding. Furthermore, a guide rod 33 is provided between the placement platform 2 and the worktable 1. The guide rod 33 is set inside a guide sleeve, which is set on the worktable 1. The guide rod 33 and the guide sleeve can ensure the stability and accuracy of the placement platform 2 during the lifting process, thereby ensuring the accuracy and quality of welding.

[0042] In summary, the welding device for parts processing provided by this utility model achieves efficient and precise welding of parts through the cooperation of various parts such as the moving part, the fixed part, the lifting part 3 and the control system. It not only greatly reduces the labor intensity and risk factor of manual operation, but also can be adjusted according to the shape and size of different parts to achieve accurate and efficient welding of parts, thus greatly improving welding efficiency and precision.

Claims

1. A welding apparatus for processing of parts, characterized by: The utility model provides a welding robot, including workbench (1), the workbench (1) top is provided with the placing table (2), the placing table (2) is connected with the lifting portion (3), one side of placing table (2) is provided with first mobile part (4), first mobile part (4) is connected with second mobile part (5), second mobile part (5) is connected with third mobile part (6), third mobile part (6) is provided with welding torch (7) on, the workbench (1) top is provided with fixed part, the fixed part is arranged in the both sides of placing table (2), the fixed part includes first fixed support (10) and the rotary portion (8) of first fixed support (10) is provided with, rotary portion (8) is connected with telescopic portion (9), telescopic portion (9), rotary portion (8), lifting portion (3), first mobile part (4), second mobile part (5) and third mobile part (6) are connected with control system.

2. The welding apparatus for machining of parts according to claim 1, characterized in that: The first mobile part (4) includes first slide rail (41) and second slide rail (42), first slide rail (41) and second slide rail (42) are arranged in parallel, first slide rail (41) and second slide rail (42) are provided with first sliding block (43), the upper end of first sliding block (43) is provided with second fixed base plate (44), second fixed base plate (44) is provided with second drive motor (45) and first speed reducer (46), first speed reducer (46) is connected with second drive motor (45), the output end of first speed reducer (46) is connected with one end of rotary shaft, the other end of rotary shaft is provided with gear (47), gear (47) is engagedly connected with rack (48), rack (48) is arranged on the inner side of first slide rail (41).

3. The welding apparatus for machining of parts as claimed in claim 1, wherein: The second mobile part (5) includes third slide rail (51) and fourth slide rail (52) arranged in parallel, the third slide rail (51) and the fourth slide rail (52) are provided with the second sliding block (57), and the first screw rod (53) is arranged between the third slide rail (51) and the fourth slide rail (52). One end of the first screw rod (53) is connected with the second speed reducer (54), the second speed reducer (54) is connected with the third drive motor (55); the first screw rod (53), the third slide rail (51) and the fourth slide rail (52) are arranged on the second fixed support (56), and the second fixed support (56) is connected with the second fixed base plate (44); the first screw rod (53) is provided with a first ball nut, and the first ball nut and the second sliding block (57) are connected with the third fixed base plate, and the third fixed base plate is connected with the third mobile part (6).

4. The welding apparatus for machining of parts according to claim 3, characterized in that: The third moving part (6) comprises a fifth sliding rail (61) and a sixth sliding rail (62) arranged in parallel, a third sliding block is arranged on the fifth sliding rail (61) and the sixth sliding rail (62), a second lead screw (63) is arranged between the fifth sliding rail (61) and the sixth sliding rail (62), one end of the second lead screw (63) is connected with a third speed reducer (64), the third speed reducer (64) is connected with a fourth driving motor (65), the second lead screw (63), the fifth sliding rail (61) and the sixth sliding rail (62) are arranged on a third fixed support (67), the third fixed support (67) is connected with a third fixed base plate, a second ball nut is arranged on the second lead screw (63), the second ball nut and the third sliding block are connected with a fourth fixed base plate (66), the fourth fixed base plate (66) is connected with the welding gun (7).

5. The welding apparatus for processing of parts according to claim 1, characterized in that: The telescopic part (9) comprises a first driving motor (91), a first telescopic rod (92) and a fixed plate (93), the fixed plate (93) is connected with the first telescopic rod (92), the first telescopic rod (92) is connected with an output end of the first driving motor (91), and the first driving motor (91) is arranged on a first fixed base plate (94); the rotating part (8) comprises a rotating motor (81) and a rotating rod (82) connected with the rotating motor (81), and the rotating rod (82) is connected with the first fixed base plate (94).

6. The welding apparatus for machining of parts according to claim 5, characterized in that: The fixed plate (93) is in a circular arc shape or a rectangular shape, and a buffer pad is arranged on the inner side surface of the fixed plate (93).

7. The welding apparatus for processing of parts according to claim 1, characterized in that: The lifting part (3) comprises a lifting cylinder (31), and a piston rod (32) is arranged on an output end of the lifting cylinder (31), and the piston rod (32) is connected with the placing table (2).

8. The welding apparatus for machining of parts according to claim 7, characterized in that: A guide rod (33) is arranged between the placing table (2) and the workbench (1), the guide rod (33) is arranged in a guide sleeve, and the guide sleeve is arranged on the workbench (1).

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