Clamp for machining U-shaped workpiece

Abstract

The utility model provides a clamp for processing a U-shaped workpiece, which comprises a first clamping unit, a second clamping unit and a distance adjusting unit, and can press a wedge block and one end of a plywood along two horizontal directions through the first clamping unit; the other wedge block and the other end of the plywood are tightly pressed in the two horizontal directions through the second clamping unit, so that the relative positions of the two wedge blocks and the plywood can be well positioned, nailing and other machining operations are facilitated, the relative positions of the two wedge blocks and the plywood cannot deviate in the machining process, and the machining efficiency is improved. And the dimensional precision of a finished product is improved. Due to the fact that the clamp is further provided with the distance adjusting unit, the distance between the two clamping units can be adjusted, the clamp is suitable for manufacturing various U-shaped workpieces of different models, multiple sets of clamps do not need to be arranged, the equipment cost is saved, the clamps do not need to be switched during model changing production, only the distance between the two clamping units needs to be adjusted, operation is more convenient, and the production efficiency is improved. And the production efficiency is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of workpiece clamps, and in particular relates to a clamp for processing a U-shaped workpiece. Background Art

[0002] In liquefied natural gas (LNG) ships, a complex insulating box is used to form a silo for storing and keeping liquefied natural gas at a low temperature. The insulating box is roughly rectangular in shape, and the structure at one end is as follows: Figure 12 or Figure 13 As shown, there are two or three strip-shaped grooves 210, and one or two right-angled U-shaped U-shaped workpieces 220 are fixedly engaged. The structure of the U-shaped workpiece is as shown in FIG. Figure 14 As shown, the U-shaped workpiece is composed of two square columnar wedges 221 and a rectangular plate-shaped plywood 222. The U-shaped workpiece has a variety of different specifications, the main difference being the length of the plywood 222.

[0003] During the manufacturing of the U-shaped workpiece, glue is applied to the joints of the two wedges 221. The ends of the plywood 222 are then overlapped with the glued areas of the two wedges 221. Finally, nails are driven into the overlapped areas to form the U-shaped workpiece 220. To ensure the structural strength and thermal insulation performance of the warehouse, the dimensional accuracy of the U-shaped workpiece is highly required.

[0004] At present, in the processing of this U-shaped workpiece, relatively simple auxiliary tools are used to position the wedge and the plywood to a certain extent. For example, two wooden strips are used to press the two sides of the wedge, and another wooden strip is used to press one side of the plywood to make it perpendicular to the two wedges. Then, the two side edges of the two ends of the plywood are manually aligned with the two side edges of the wedge on the corresponding side and then nailed. It can be seen that the operation is very inconvenient. During the process, the relative position of the plywood and the wedge is easily offset, which causes the dimensional accuracy of the finished U-shaped workpiece to fail to meet the requirements. Utility Model Content

[0005] The present invention is designed to solve the above-mentioned problem and aims to provide a fixture capable of clamping and positioning two wedges and plywood, thereby making the processing of U-shaped workpieces more convenient and the finished product more precise. The present invention adopts the following technical solutions:

[0006] The utility model provides a clamp for processing a U-shaped workpiece, which is used to process two square column-shaped wedge blocks and a rectangular plate-shaped plywood into a U-shaped workpiece. The clamp has the following technical features: a first clamping unit, which is used to press one of the wedge blocks and one end of the plywood along two horizontal directions perpendicular to each other to fix their relative positions; a second clamping unit, which is used to press the other wedge block and the other end of the plywood along the two horizontal directions to fix their relative positions; and a spacing adjustment unit, which is used to adjust the spacing between the first clamping unit and the second clamping unit.

[0007] The U-shaped workpiece processing fixture provided by the present invention may also have such technical features, wherein the first clamping unit includes: a plurality of first fixed pressure heads, including a fixed pressure head for X-axis alignment and a first fixed pressure head for Y-axis alignment, which respectively have pressing surfaces perpendicular to the x-axis direction and the y-axis direction; a first wedge block movable pressing mechanism, including a plurality of first movable pressure heads, respectively corresponding to the plurality of first fixed pressure heads, for cooperating with them to press the wedge block; and a first plate pressing mechanism, including a first Y-axis plate movable pressure head, which has a pressing surface perpendicular to the y-axis direction and can be moved along the y-axis direction; the second clamping unit includes: a plurality of second fixed pressure heads, including a second Y-axis alignment fixed pressure head, which has a pressing surface perpendicular to the y-axis direction a pressing surface perpendicular to each other; a movable pressing mechanism for a second wedge block, comprising a plurality of second movable pressure heads, respectively corresponding to the plurality of second fixed pressure heads, for cooperating therewith to press the wedge block; and a pressing mechanism for a second plate, comprising a movable pressure head for an X-axis plate and a second movable pressure head for a Y-axis plate, which respectively have pressing surfaces perpendicular to the x-axis direction and the y-axis direction, and can be moved along the x-axis direction and the y-axis direction respectively, the movable pressure head for the X-axis plate is used to cooperate with the fixed pressure head for X-axis alignment to press the plywood along the x-axis direction, the movable pressure head for the first Y-axis plate and the second movable pressure head for the Y-axis plate are used to cooperate with the fixed pressure head for the first Y-axis alignment and the second fixed pressure head for Y-axis alignment to press the plywood along the y-axis direction.

[0008] The U-shaped workpiece processing fixture provided by the utility model can also have such technical features, wherein the first clamping unit also includes a first loading plate, the upper surface of which is a plane, and multiple first fixed pressure heads are fixed on the upper surface of the first loading plate, and multiple first movable pressure heads are located above the first loading plate, and a first wedge block placement portion is formed between the pressing surfaces of the multiple first fixed pressure heads, the pressing surfaces of the multiple first movable pressure heads, and the upper surface of the first loading plate for placing one of the wedge blocks, and the second clamping unit also includes a second loading plate, the upper surface of which is a plane, and multiple second fixed pressure heads are fixed on the upper surface of the first loading plate, and multiple second movable pressure heads are located above the second loading plate, and a second wedge block placement portion is formed between the pressing surfaces of the multiple second fixed pressure heads, the pressing surfaces of the multiple second movable pressure heads, and the upper surface of the second loading plate for placing another of the wedge blocks.

[0009] The U-shaped workpiece processing fixture provided by the utility model can also have such technical features, wherein the first clamping unit also includes a first plate support member, which is arranged on the side of the upper surface of the first loading plate close to the second clamping unit, and its upper surface is a plane; the second clamping unit also includes a second plate support member, which is arranged on the side of the upper surface of the second loading plate close to the first clamping unit, and its upper surface is a plane; a plywood placement portion is formed between the multiple pressing surfaces of the X-direction alignment fixed pressure head, the first Y-direction alignment fixed pressure head, the second Y-direction alignment fixed pressure head, the X-direction plate movable pressure head, the first Y-direction plate movable pressure head, and the second Y-direction plate movable pressure head, as well as the upper surface of the first plate support member and the upper surface of the second plate support member, for placing one of the plywood.

[0010] The U-shaped workpiece processing fixture provided by the utility model may also have such technical features, wherein the first plate clamping mechanism also includes a first plate driving cylinder, and the first Y-direction plate movable pressure head is arranged on the end of the piston rod of the first plate driving cylinder, and the second plate clamping mechanism also includes a second plate driving cylinder and a third plate driving cylinder, the second Y-direction plate movable pressure head is arranged on the end of the piston rod of the second plate driving cylinder, and the X-direction plate movable pressure head is arranged on the end of the piston rod of the third plate driving cylinder.

[0011] The U-shaped workpiece processing fixture provided by the present invention may also have such technical features, which also includes: an electronic control unit, including a sensor assembly and a relay assembly, wherein the sensor assembly includes: a first wedge block detection sensor, fixed on the lower surface of the first loading plate, and its detection end is directed toward the first wedge block placement portion through the through hole on the first loading plate, for detecting whether there is a wedge block placed in the first wedge block placement portion; a second wedge block detection sensor, fixed on the lower surface of the second loading plate, and its detection end is directed toward the second wedge block placement portion through the through hole on the second loading plate, for detecting whether another wedge block is placed in the second wedge block placement portion; and a first plywood detection sensor and a second plywood detection sensor, respectively arranged on the mutually adjacent edge portions of the first loading plate and the second loading plate, and their detection ends are both directed toward the plywood placement portion, for detecting whether the plywood is placed in the plywood placement portion, and the relay assembly includes multiple relays, which are used to control at least the first plate driving cylinder, the second plate driving cylinder, and the third plate driving cylinder respectively.

[0012] The U-shaped workpiece processing fixture provided by the present invention may also have such technical features, wherein the driving cylinder for the first plate, the driving cylinder for the second plate, and the driving cylinder for the third plate have one end of the piston rod respectively covered with a sheet-shaped cylinder protection part, and the first fixed pressure head, the second fixed pressure head, the first movable pressure head, the second movable pressure head, the movable pressure head for the first Y-direction plate, the movable pressure head for the second Y-direction plate, the movable pressure head for the X-direction plate, and the cylinder protection part are all stainless steel parts.

[0013] The U-shaped workpiece processing fixture provided by the present invention may also have such technical features, wherein the first clamping unit has a first unit bottom plate, the second clamping unit has a second unit bottom plate, and the spacing adjustment unit includes: two movable guide rails, the first clamping unit and the second clamping unit are respectively slidably arranged on the two movable guide rails; two limiting guide rails are respectively arranged on the outside of the multiple movable guide rails; a spacing maintaining component, which is arranged between the first unit bottom plate and the second unit bottom plate, and is used to respectively abut therewith to maintain the spacing; two first unit locking components are arranged on one end of the two movable guide rails, and are used to cooperate with the spacing maintaining component to fix the position of the first clamping unit; and two second unit locking components are respectively movably arranged on the two limiting guide rails, and are used to fix the position of the first clamping unit by clamping the two sides of the first unit bottom plate.

[0014] The U-shaped workpiece processing fixture provided by the utility model may also have such technical features, wherein the first unit locking component includes a bracket plate arranged on one end of the guide rail and an adjusting bolt adjustably arranged on the bracket plate, the tail of the adjusting bolt faces one side of the first unit base plate, the second unit locking component includes a ball handle movably arranged on the limiting guide rail and a clamping plate connected to the ball handle, and the clamping plates of the two second unit locking components are used to cooperate in clamping the opposite sides of the second unit base plate.

[0015] The U-shaped workpiece processing fixture provided by the present invention may also have such technical features, which also includes: two nailing auxiliary units, respectively arranged next to the first clamping unit and the second clamping unit, for cooperating with a nail gun to nail the overlapping part of the wedge block and one end of the plywood clamped and fixed by the first clamping unit or the second clamping unit, wherein the nailing auxiliary unit includes: a flip driving cylinder; a flip arm, which is connected to the flip driving cylinder through a corresponding transmission assembly and can be flipped relative to the plywood placement part; and a nailing positioning auxiliary part, which is arranged on the outer end of the flip arm, and has one or more nailing positioning holes, for indicating the position to be nailed on the overlapping part.

[0016] Function and effect of utility model

[0017] According to the present invention, the fixture for processing U-shaped workpieces includes a first clamping unit, a second clamping unit, and a spacing adjustment unit. The first clamping unit can be used to press a wedge against one end of a plywood sheet in two horizontal directions, and the second clamping unit can be used to press another wedge against the other end of the plywood sheet in two horizontal directions. Therefore, the relative positions of the two wedges and a plywood sheet can be well positioned, thereby facilitating processing operations such as nailing. During the processing, their relative positions will not shift, which is also conducive to improving the dimensional accuracy of the finished U-shaped workpiece. Furthermore, since there is also a spacing adjustment unit that can adjust the spacing between the first clamping unit and the second clamping unit, plywood sheets of different lengths can be used for processing. In other words, the fixture is suitable for manufacturing a variety of different types of U-shaped workpieces. There is no need to equip multiple sets of fixtures for this purpose, which saves equipment costs. There is no need to switch fixtures when changing production models. Only the spacing between the two clamping units needs to be adjusted, which makes operation more convenient and production efficiency higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of a fixture for processing a U-shaped workpiece according to an embodiment of the present utility model;

[0019] Figure 2 is a three-dimensional diagram of the first clamping unit in an embodiment of the present utility model;

[0020] Figure 3 is a side view of the first clamping unit in an embodiment of the present utility model;

[0021] Figure 4 is a top view of the first clamping unit in an embodiment of the present utility model;

[0022] Figure 5 is a three-dimensional diagram of the X-direction wedge fixing the pressure head in this embodiment;

[0023] Figure 6 is a perspective view of the second clamping unit in an embodiment of the present utility model;

[0024] Figure 7 is a top view of the second clamping unit in an embodiment of the present utility model;

[0025] Figure 8 This is a perspective view of a movable pressure head for an X-direction plate in an embodiment of the present utility model;

[0026] Figure 9 This is a three-dimensional diagram of a nail positioning auxiliary member in an embodiment of the present utility model;

[0027] Figure 10 This is a three-dimensional diagram of the U-shaped workpiece processing fixture in use according to the embodiment of the present utility model;

[0028] Figure 11 This is a flow chart of processing a U-shaped workpiece using a U-shaped workpiece processing fixture and a nail gun in an embodiment of the present invention;

[0029] Figure 12 It is a structural diagram of one end of an insulating box in the prior art;

[0030] Figure 13 It is a structural schematic diagram of one end of another insulating box in the prior art;

[0031] Figure 14 It is a three-dimensional diagram of a U-shaped workpiece in the prior art.

[0032] Reference numerals:

[0033] U-shaped workpiece processing fixture 100; first clamping unit 10; mounting frame 11; column 111; mounting plate

[0034] 112; clearance hole 112a; sensor hole 112b; limiting notch 112c; fixed pressing mechanism 12; X-axis wedge fixed pressure head 121; pressing surface 121a; X-axis alignment fixed pressure head 122; Y-axis alignment fixed pressure head 123; wedge movable pressing mechanism 13; guide rail 131; slide member 132; slide drive cylinder 133; X-axis wedge movable pressure head 134; mounting plate drive cylinder 135; mounting plate 136; Y-axis wedge movable pressure head 137; pressure head limiter 138; slide limiter 139; plate support 14; unit bottom plate 15; first plate pressing mechanism 1 6; first plate driving cylinder 161; Y-direction plate movable pressure head 162; cylinder protection member 163; second clamping unit 20; carrier 21; fixed pressing mechanism 22; X-direction wedge fixed pressure head 221; Y-direction alignment fixed pressure head 223; wedge movable pressing mechanism 23; guide rail 131; slide member 132; slide driving cylinder 133; X-direction wedge movable pressure head 134; mounting plate driving cylinder 135; mounting plate 136; Y-direction wedge movable pressure head 137; pressure head limiter 138; slide limiter 139; plate support member 24; unit bottom plate 25; second plate pressing mechanism 26; first Second plate driving cylinder 261; Y-plate movable ram 262; cylinder protection member 263; third plate driving cylinder 264; X-plate movable ram 265; ram body 2651; ram extension 2652; pressing surface 265a; cylinder protection member 266; first wedge placement portion 71; second wedge placement portion 72; plywood placement portion 73; spacing adjustment unit 40; guide assembly 41; moving guide rail 411; position limiting assembly 42; position limiting guide rail 421; spacing maintaining member 422; first unit locking member 423; second unit locking member 424; moving driving assembly 43 ; Lead screw 431; Moving handle 433; Nailing auxiliary unit 50; Flip drive cylinder 51; Transmission assembly 52; Adapter 521; Rotating shaft 522; Flip bracket 523; Flip limiter 524 Flip arm 53; Nailing positioning auxiliary part 54; Nailing positioning hole 541; Electronic control unit 60; Sensor assembly 61; First wedge block detection sensor 611; First plywood detection sensor 612; Second wedge block detection sensor 613; Second plywood detection sensor 614; Relay assembly 62; Insulation box 200; Groove 210; U-shaped workpiece 220; Wedge block 221; Plywood 222. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the following is a detailed description of the U-shaped workpiece processing fixture of the present invention in conjunction with the embodiments and drawings.

[0036] <Example>

[0037] This embodiment provides a U-shaped workpiece processing fixture, which is used to cooperate with a processing tool to process two wedge blocks 221 and a plywood 222 into a U-shaped workpiece 220 with an overall right-angled U shape. The wedge blocks and the plywood are both made of wood.

[0038] In this embodiment, the nominal width of the end face of the insulation box 200 ranges from 480 mm to 980 mm. The U-shaped workpiece 220 comes in various sizes corresponding to the dimensions of the insulation box end face, each size varying. The nominal length of the U-shaped workpiece 220 ranges from 449 mm to 949 mm. The wedge 221 used to form the U-shaped workpiece 200 ranges from 202 mm to 211 mm in length, 37 mm in width, and 21 mm in thickness. The plywood 222 ranges from 499 mm to 949 mm in length, 75 mm in width, and 9 mm in thickness.

[0039] It can be seen that the overall lengths of different types of U-shaped workpieces 220 vary greatly, that is, the lengths of the plywood 222 used therein vary greatly. The fixture of this embodiment is used to process various types of U-shaped workpieces.

[0040] Figure 1 It is a three-dimensional view of the fixture for processing a U-shaped workpiece in this embodiment.

[0041] like Figure 1 As shown, a U-shaped workpiece processing fixture 100 (hereinafter referred to as fixture 100 ) includes a base 30 , a first clamping unit 10 , a second clamping unit 20 , a spacing adjustment unit 40 , two nailing auxiliary units 50 and an electric control unit 60 .

[0042] The base 30 includes a base plate 31 with multiple through holes and four pull rings 32 arranged at its four corners. The through holes on the base plate 31 include multiple mounting holes and one or more positioning holes 311. The positioning holes 311 are used to cooperate with the corresponding pinning mechanism so that the base 30 and the workpiece thereon can be positioned to the specified position corresponding to the nail gun.

[0043] The first clamping unit 10 and the second clamping unit 20 are respectively used to clamp and position two wedge blocks 221 , and are also used to cooperate with each other to clamp and position a plywood 222 .

[0044] Figure 2 is a three-dimensional diagram of the first clamping unit in this embodiment, Figure 3 is a side view of the first clamping unit in this embodiment, Figure 4 3 is a top view of the first clamping unit in this embodiment.

[0045] like Figures 2 to 4As shown, the first clamping unit 10 includes a unit base plate 15 , a mounting frame 11 , a fixed pressing mechanism 12 , a movable pressing mechanism for wedges 13 , a plate support 14 , and a first plate pressing mechanism 16 .

[0046] The unit bottom plate 15 is a rectangular flat plate.

[0047] The mounting frame 11 includes multiple columns 111 and a mounting plate 112. The columns 111 are mounted parallel to each other between the unit base plate 15 and the mounting plate 112. At least the top surface of the mounting plate 112 is flat, with a central opening 112a with a rounded rectangular cross-section. A smaller sensor hole 112b with a circular cross-section is located to one side of the opening 112a. A square retaining notch 112c is located along one side of the width of the first mounting plate 112.

[0048] The fixed pressing mechanism 12 has multiple fixed pressing blocks, and the wedge block movable pressing mechanism 13 has multiple movable pressing blocks. These fixed pressing blocks cooperate with the corresponding movable pressing blocks to clamp and position a wedge block 221 along two mutually perpendicular horizontal directions (x-axis and y-axis directions in the figure).

[0049] The fixed pressing mechanism 12 includes an X-direction wedge fixed pressure head 121, an X-direction alignment fixed pressure head 122 and a Y-direction alignment fixed pressure head 123 arranged in an L shape, each pressure head is fixed to the mounting plate 112 via a corresponding connecting plate.

[0050] Figure 5 It is a three-dimensional diagram of the X-direction wedge fixing the pressure head in this embodiment.

[0051] like Figure 5 As shown, the X-axis wedge fixed pressure head 121 is generally in the shape of a rectangular block and has a pressing surface 121a, which is a plane perpendicular to the x-axis direction. The pressure head also has multiple through holes, one end of which is located on the pressing surface 121a. Some of the through holes are countersunk holes 121b used to fit screws to fix the pressure head to the corresponding connecting plate, and other through holes are used to reduce the weight of the pressure head. The height of the pressing surface 121a (the height in the z-axis direction in the figure) is at least greater than half the height (thickness) of the wedge block 221, and is preferably 70% to 95% of the height of the wedge block.

[0052] The pressing surface of the X-axis fixed ram 122 is perpendicular to the x-axis and coplanar with the pressing surface of the X-axis wedge fixed ram 121. The pressing surface of the Y-axis fixed ram 123 is perpendicular to the y-axis, with one end of the two rams positioned adjacent to each other in an L-shaped arrangement. The height of these two pressing surfaces is at least half the combined thickness of the stacked wedge 221 and plywood 222, preferably 70% to 95% of this total thickness.

[0053] The structures of the other pressing heads mentioned below are also basically the same as the X-direction wedge fixed pressing head 121, and the only difference is the overall length and / or height of the pressing head and the direction of the pressing surface. In this embodiment, the material of the pressing head is stainless steel.

[0054] The movable pressing mechanism 13 for the wedge block includes a plurality of movable pressing heads for cooperating with the plurality of fixed pressing heads of the fixed pressing mechanism 12 to press the wedge block 221 in the x-axis direction and the y-axis direction, thereby clamping and positioning the wedge block.

[0055] The movable clamping mechanism 13 for the wedge block includes two guide rails 131, a slide component 132, a slide drive cylinder 133, two X-direction wedge block movable pressure heads 134, a mounting plate drive cylinder 135, a mounting plate 136, a Y-direction wedge block movable pressure head 137, a pressure head limiter 138, and a slide limiter 139.

[0056] Two guide rails 131 are disposed parallel to each other on the unit base plate 15, extending in the x-axis direction. The slide assembly 132 is generally I-shaped and slidably disposed on the two guide rails 131. The upper end of the slide assembly 132 passes through the clearance hole 112a in the carrier plate 112 and is located above the carrier plate 112. The piston rod end of the slide drive cylinder 133 is connected to one side of the slide assembly 132 via an adapter, driving the slide assembly 132 along the guide rails 131.

[0057] The slide limiter 139 is in a right-angled Z shape and is fixed on the unit base plate 15 . It is used to abut against one side of the slide component 132 when the slide component 132 slides to a corresponding position along the guide rail 131 , thereby limiting the sliding stroke of the slide component 132 .

[0058] Two X-direction wedge movable rams 134 are mounted on one side of the upper end of the slide assembly 132 and are located above the mounting plate 112. The pressing surfaces of the two X-direction wedge movable rams 134 are coplanar and perpendicular to the x-axis. These two pressing surfaces are arranged to face the pressing surfaces of the X-direction wedge fixed ram 121 and the X-direction alignment fixed ram 122 in the x-direction, thereby cooperating to clamp the wedge 221 in the x-direction.

[0059] Mounting plate drive cylinder 135 is fixed to one side edge of the lower surface of carrier plate 112, with one end of its piston rod facing outward and capable of extension and contraction along the y-axis. Mounting plate 136 is in an inverted T-shape, with its lower portion fixed to the piston rod end of mounting plate drive cylinder 135. Its surface is perpendicular to the y-axis, and its upper end is positioned above carrier plate 112.

[0060] The movable pressure head 137 of the Y-direction wedge block is fixed to the upper end of the mounting plate 136 and is located above the loading plate 112. Its pressing surface is perpendicular to the y-axis direction, and the pressing surface and the pressing surface of the fixed pressure head 123 for Y-direction alignment are arranged opposite to each other in the y-axis direction, so that they can cooperate to clamp the wedge block 221 in the y-axis direction.

[0061] The ram stopper 138 is a rectangular parallelepiped, fixed to the center of the mounting plate 136 and mounted on the same surface of the mounting plate 136 as the Y-direction wedge movable ram 137. Its position corresponds to the limiting notch 112c on the mounting plate 112. When the piston rod of the mounting plate drive cylinder 135 is retracted, the ram stopper 138 engages with the bottom edge of the limiting notch 112c, thereby limiting the travel of the Y-direction wedge movable ram 137.

[0062] A long strip of first wedge placement portion 71 is formed between the pressing surfaces of the X-axis wedge fixed pressure head 121, the X-axis alignment fixed pressure head 122, the Y-axis alignment fixed pressure head 123, the two X-axis wedge movable pressure heads 134, the Y-axis wedge movable pressure head 137 and the upper surface of the loading plate 112, for placing a wedge 221.

[0063] The board support 14 is used to support the middle portion of the plywood 222. It is generally rectangular in shape, with its upper surface being a flat surface perpendicular to the z-axis. The height of the board support 14 is substantially equal to the height (thickness) of the wedge 221. Its length is along the y-axis. The board support 14 is positioned on the upper surface of the mounting plate 112, on the side closest to the second clamping unit 20.

[0064] The first plate pressing mechanism 16 includes a first plate driving cylinder 161 , a Y-plate movable pressing head 162 , and a cylinder protector 163 .

[0065] The first plate driving cylinder 161 is provided on the upper surface of the slide member 132 and is located above the mounting plate 112. One end of the first plate driving cylinder 161 is directed toward the Y-alignment fixed pressure head 123, and the first plate driving cylinder 161 is extendable along the Y-axis direction.

[0066] The movable pressing head 162 for the Y-direction plate is fixed to the end of the piston rod of the first plate driving cylinder 161 through a corresponding mounting plate, and its pressing surface is perpendicular to the y-axis direction.

[0067] The cylinder protection member 163 is a metal sheet member generally in a "U" shape as a whole. The middle part thereof is fixed on the mounting plate of the movable punch 162 for the Y-direction plate, and generally covers one end of the first plate driving cylinder 161 having a piston rod. There is a square notch in the middle part. The cylinder protection member 163 plays a role in protecting the movable parts of the cylinder, preventing them from sticking to the piston rod and affecting its expansion and contraction. The structures of the following multiple cylinder protection members are basically the same as that of the cylinder protection member 163. In this embodiment, the cylinder protection members are all made of stainless steel.

[0068] Figure 6 is a perspective view of the second clamping unit in this embodiment, Figure 7 is a top view of the second clamping unit in this embodiment.

[0069] As Figure 6 and Figure 7 shown, the second clamping unit 20 includes a unit bottom plate 25, a placement rack 21, a fixed pressing mechanism 22, a movable pressing mechanism 23 for the wedge block, a plate support member 24, and a second plate pressing mechanism 26.

[0070] Among them, the structures of the unit bottom plate 25, the placement rack 21, the plate support member 24, and the movable pressing mechanism 23 for the wedge block are basically the same as the corresponding structures in the first clamping unit 10. The placement rack 21 also includes a placement plate 211, which will not be elaborated here.

[0071] The fixed pressing mechanism 22 includes two X-direction wedge block fixed punches 221 and one Y-direction alignment fixed punch 223, and their structures are basically the same as the corresponding structures in the first clamping unit 10. The pressing surfaces of the two X-direction wedge block fixed punches 221 are coplanar. That is, compared with the fixed pressing mechanism 12, the fixed pressing mechanism 22 does not have an X-direction alignment fixed punch, and at the corresponding position, there is an X-direction wedge block fixed punch 221 with a lower height.

[0072] The movable pressing mechanism 23 for the wedge block also includes a guide rail 231, a slide table component 232, a slide table driving cylinder 233, two X-direction wedge block movable punches 234, a mounting plate driving cylinder 235, a mounting plate 236, a Y-direction wedge block movable punch 237, a punch limiting member 238, and a slide table limiting member 139.

[0073] A long second wedge block placement portion 72 is formed between the pressing surfaces of the two X-direction wedge block fixed punches 221, the Y-direction alignment fixed punch 223, the two X-direction wedge block movable punches 234, the Y-direction wedge block movable punch 237 and the upper surface of the placement plate 212 for placing another wedge block 221.

[0074] The second plate pressing mechanism 26 includes a second plate driving cylinder 261 , a Y-plate movable ram 262 , a cylinder protector 263 , a third plate driving cylinder 264 , an X-plate movable ram 265 , and a cylinder protector 266 .

[0075] The second plate driving cylinder 261 is disposed on the upper surface of the mounting plate 212 and on a side close to the first clamping unit 10 , and its piston rod is extendable and retractable along the y-axis direction.

[0076] The Y-plate movable ram 262 is fixed to the piston rod end of the second plate drive cylinder 261 via a corresponding mounting plate, with its contact surface perpendicular to the y-axis. Furthermore, when the piston rods of the first and second plate drive cylinders 161 and 261 are fully retracted or fully extended, the contact surfaces of the Y-plate movable ram 162 and 262 are coplanar.

[0077] The cylinder protection member 263 covers one end of the piston rod of the second plate driving cylinder 261 to protect its movable parts.

[0078] The third plate driving cylinder 264 is arranged on the upper surface of the slide part 232 of the second clamping unit 20, and is close to the side where the fixed pressure head 223 for Y-direction alignment is provided. It has one end of the piston rod facing the first clamping unit 10, and the piston rod can be extended and retracted along the x-axis direction.

[0079] The movable pressing head 265 for the X-direction plate is fixed to the piston rod end of the third plate driving cylinder 264 through the corresponding mounting plate, and is used to cooperate with the fixed pressing head 122 for X-direction alignment to clamp and position the plywood 222 in the x-axis direction.

[0080] Figure 8 It is a perspective view of the movable pressing head for the X-direction plate in this embodiment.

[0081] like Figure 8 As shown, the movable ram 265 for the X-direction plate is generally elongated, with a stepped cross-section along its length. It comprises a roughly rectangular ram body 2651 and a ram extension 2652 extending from one side of the ram body 2651. The ram extension 2652 is also roughly rectangular, with its height (on the z-axis) being much smaller than that of the ram body 2651. The outer end surface of the ram extension 2652 in the direction of extension serves as a pressing surface 265a. The pressing surface 265a is disposed opposite the pressing surface of the fixed ram 122 for X-direction alignment along the x-axis. The pressing surface 265a is a slender strip that matches the longitudinal end surface of the plywood 222, and its height is at least half the height (thickness) of the plywood 222.

[0082] The cylinder protection member 266 covers one end of the piston rod of the third plate driving cylinder 264 to protect its moving parts.

[0083] A long strip of plywood placement portion 73 is formed between the multiple pressing surfaces of the fixed pressure head 122 for X-direction alignment, the fixed pressure head 123 for Y-direction alignment, the fixed pressure head 223 for Y-direction alignment, the movable pressure head 265 for X-direction plate, the movable pressure head 162 for Y-direction plate, and the movable pressure head 262 for Y-direction plate, and between the two upper surfaces of the plate support 14 and the plate support 15, for placing a plywood 222.

[0084] The spacing adjustment unit 40 is used to allow the first clamping unit 10 and the second clamping unit 20 to move laterally in the x-axis direction, adjusting the spacing between them, so that the clamp 100 can be used to clamp and position plywood 222 of different lengths. The spacing adjustment unit 40 includes a guide assembly 41, a limit assembly 42, and a movement drive assembly 43.

[0085] The guide assembly 41 includes two movable guide rails 411 and a plurality of sliders.

[0086] The two moving guide rails 411 are provided on the base plate 31 in parallel with each other, and their extending direction is the x-axis direction.

[0087] The plurality of sliders are movably engaged on the two moving guide rails 411 , and the unit bottom plate 15 and the unit bottom plate 25 are fixed on the plurality of sliders, so that the first clamping unit 10 and the second clamping unit 20 can move along the moving guide rails 411 .

[0088] The limiting assembly 42 includes two limiting guide rails 421 , a pair of spacing maintaining components 422 , a pair of first unit locking components 423 , and a pair of second unit locking components 424 .

[0089] The two position-limiting guide rails 421 are disposed on the base plate 31 in parallel with each other and are respectively located outside the two movement guide rails 411 , and their extending directions are also the x-axis direction.

[0090] A pair of spacing maintaining components 422 are respectively arranged on the outside of the two moving guide rails 411 and close to the guide rails. The spacing maintaining components 422 are generally in an I-shape.

[0091] A pair of first unit locking components 423 are respectively disposed at one end of the two movable guide rails 411. The first unit locking components 423 comprise an end plate that snaps onto one end of the movable guide rail 411, and an adjustment bolt and nut disposed on the end plate. The first clamping unit 10 is positioned between the spacing maintaining component 422 and the first unit locking components 423. Rotating the adjustment bolts forces the outer ends of the adjustment bolts into contact with the unit base plate 15, thereby securing the first clamping unit 10 in conjunction with the spacing maintaining component 422.

[0092] A pair of second unit locking components 424 are movably mounted on the two position-limiting guide rails 421. The second unit locking components 424 include an adjustable ball handle and a clamping plate mounted on the handle. The upper end of the clamping plate is positioned above the position-limiting guide rails 421, and the surface direction of the clamping plate is perpendicular to the y-axis. The second clamping unit 20 is moved to one side of the unit base plate 25 so as to abut against the spacing maintaining component 422. The pair of second unit locking components 424 are then moved to both sides of the unit base plate 25, and the ball handle is rotated so that the pair of clamping plates clamp the unit base plate 25. This secures the second clamping unit 20, and allows the second clamping unit 20 to be secured at multiple positions at different distances from the first clamping unit 10.

[0093] The moving drive assembly 43 includes a lead screw 431 , a connecting block, and a moving handle 433 .

[0094] A lead screw 431 is disposed between the two movable guide rails 411, extending in the same direction as the guide rails. A connecting block is mounted on the lead screw 431, and the unit base plate 15 of the first clamping unit 10 is fixed to the connecting block. A movable handle 433 is disposed at one end of the lead screw 431 and is used to rotate the lead screw 431, thereby moving the first clamping unit 10 along the x-axis. Alternatively, the lead screw 431 may be driven by a motor or the like, rather than the movable handle 433.

[0095] The nailing auxiliary unit 50 includes a flip driving cylinder 51 , a transmission assembly 52 , a flip arm 53 , and a nailing positioning auxiliary component 54 .

[0096] The flip drive cylinder 51 is set on the unit base plate 14 or the unit base plate 15, and is located next to the side of the carrier where the fixed pressure head for Y-direction alignment is provided. The cylinder is set vertically, and one end of the piston rod is facing upward and the piston rod can be extended and retracted along the z-axis direction.

[0097] The transmission assembly 52 includes an adapter 521, a rotating shaft 522, a bearing, a flip bracket 523, and a flip limiter 524. The adapter 521 is Y-shaped, and the rotating shaft 522 is mounted on both ends of the upper part of the adapter 521 through a pair of bearings. The axial direction of the rotating shaft 522 is the x-axis direction. The nailing flip bracket 523 is provided on the unit bottom plate and is closer to the carrier relative to the flip drive cylinder 41. The upper end of the flip bracket 523 is a flip support rod, which is a short round rod, and its axial direction is also the x-axis direction. The flip limiter 424 is provided on the flip bracket 423 and is relatively closer to the carrier. Its upper end has a square groove for abutting against the flip arm 32 to limit its flip angle.

[0098] The flip arm 53 is T-shaped as a whole, with the lower end of the T connected to the rotating shaft 522. The upper crossbar of the T is relatively short and has multiple mounting holes. The middle part of the flip arm 53 rests on the flip support rod of the flip bracket 423, using it as a fulcrum for rotation.

[0099] One end of the nail positioning auxiliary part 54 is fixed on the upper horizontal bar of the T-shape of the flip arm 43, and is used to nail and position the overlapping position of a wedge block 221 clamped and fixed by the clamping unit and one end of the plywood 222, so as to facilitate nailing using a nail gun.

[0100] Figure 9 It is a three-dimensional view of the nail positioning auxiliary component in this embodiment.

[0101] like Figure 9 As shown, the nail positioning aid 54 is a rectangular plate with a missing corner. It is provided with multiple nail positioning holes 541 for assisting in locating the multiple nailing positions in the overlapped position. The nail positioning holes 541 are through-holes with a rounded rectangular cross-section. In this embodiment, two nail positioning holes 541 are provided, arranged roughly along a diagonal line of the nail positioning aid 54.

[0102] The electronic control unit 60 includes a sensor assembly 61 and a relay assembly 62 .

[0103] Sensor assemblies 61 are installed in the first clamping unit 10 and the second clamping unit 20 to detect the placement of wedges and plywood, thereby enabling automated control. Sensor assembly 61 includes a first wedge detection sensor 611, a first plywood detection sensor 612, a second wedge detection sensor 613, and a second plywood detection sensor 614. In this embodiment, these sensors are all photoelectric sensors.

[0104] The first wedge block detection sensor 611 is fixed roughly vertically on the lower surface of the loading plate 112 by a bracket, and its detection end is set in the sensor hole 112b, and the detection end is facing the first wedge block placement part 71 above, which is used to detect whether a wedge block 221 is placed in the first wedge block placement part 71.

[0105] The first plywood detection sensor 612 is fixed roughly horizontally on the upper surface of the loading plate 112 by a roughly P-shaped bracket, and is located on the side close to the second clamping unit 20. Its detection end is facing the pressing surface of the movable pressure head 162 for the Y-axis plate (that is, toward the middle of the plywood placement portion 73), and is used to detect whether a plywood 222 is placed in the plywood placement portion 73.

[0106] The second wedge detection sensor 613 is also installed in the second clamping unit 20 to detect whether the wedge 221 is placed in the second wedge placement portion 72 .

[0107] The second plywood detection sensor 614 is also installed in the second clamping unit 20 and is used to detect whether a plywood 222 is placed in the plywood placement portion 73. In this embodiment, it is determined that a plywood 222 is placed in the plywood placement portion 73 only when both the first plywood detection sensor 612 and the second plywood detection sensor 614 detect corresponding signals.

[0108] The relay assembly 62 includes a plurality of relays, each of which is used to control the plurality of cylinders.

[0109] Figure 10 It is a three-dimensional diagram of the use state of the clamp for processing a U-shaped workpiece in this embodiment.

[0110] like Figure 10 As shown, during use, the first clamping unit 10 is used to clamp and position one wedge block 221 and one end of the plywood 222, while the second clamping unit 20 is used to clamp and position the other wedge block 221 and the other end of the plywood 222. The clamp 100 can then be positioned below a corresponding nail gun through the positioning hole 311 on the base plate 31. The nail gun can then be operated to drive a nail into the overlapping position of the clamped wedge block 221 and one end of the plywood 222. During nailing, the nozzle of the nail gun is roughly aligned with the nail positioning hole 541 on the nail positioning auxiliary member 54.

[0111] Furthermore, the spacing distance between the first clamping unit 10 and the second clamping unit 20 can be adjusted by the spacing adjustment unit 40 , so that the fixture 100 can be suitable for processing U-shaped workpieces of different sizes.

[0112] In an alternative solution, the stacked wedges and plywood may be fixed by other methods known in the art. Therefore, the clamp 100 may optionally not have the nailing auxiliary unit 50 or may have a processing auxiliary unit corresponding to other fixing tools.

[0113] Figure 11 This is a flow chart of processing a U-shaped workpiece using a U-shaped workpiece processing fixture and a nail gun in this embodiment.

[0114] like Figure 11 As shown, the process of using the fixture 100 and the nail gun to form the U-shaped workpiece 220 includes the following steps:

[0115] In step S1 , according to the size of the U-shaped workpiece to be processed, the distance between the first clamping unit 10 and the second clamping unit 20 is adjusted to a distance corresponding to the size of the workpiece by the distance adjustment unit 40 .

[0116] Among them, first tighten a pair of adjustment bolts (second unit locking parts 424) to fix the position of the second clamping unit 20, and then move the first clamping unit 10 by moving the handle 433 until it is moved to the position of the corresponding spacing, and then fix the position of the first clamping unit 10 by a pair of first unit locking parts 423 (ball head handle and clamping plate).

[0117] Step S2 , respectively place the two wedge blocks 221 coated with glue at the positions to be overlapped into the first wedge block placement portion 71 of the first clamping unit 10 and the second wedge block placement portion 72 of the second clamping unit 20 , and then place the plywood 222 into the plywood placement portion 73 .

[0118] Before step S1, the flip arm 53 and multiple movable pressure heads are in the reset state, and the distance between the corresponding movable pressure heads and the fixed pressure heads is slightly larger than the corresponding size of the wedge block or the plywood. Preferably, the distance between the corresponding movable pressure heads and the fixed pressure heads is 3 mm larger than the corresponding size of the wedge block or the plywood.

[0119] In step S3, the sensor assembly 61 detects the two wedge blocks 221 and the plywood 222. Under the control of the corresponding relays, the wedge block movable pressing mechanism 13 and the wedge block movable pressing mechanism 23 respectively drive their multiple movable pressure heads to move toward the corresponding fixed pressure heads, clamping and fixing the two wedge blocks 221 along two horizontal directions; the first plate pressing mechanism 16 and the second plate pressing mechanism 26 respectively drive their multiple movable pressure heads to move toward the corresponding fixed pressure heads, clamping and fixing the plywood 222 along two horizontal directions.

[0120] In step S3 , the movable pressure heads may be pressed in sequence according to a predetermined order, or several movable pressure heads may be pressed simultaneously.

[0121] In step S4 , the flip drive cylinder 51 drives the flip arm 53 to flip toward the workpiece, so that the nail positioning auxiliary member 54 is pressed on the overlapping position of the wedge block 221 and one end of the plywood 222 .

[0122] In step S5 , a nail gun and the nailing positioning holes 541 on the nailing positioning auxiliary member 54 are used to nail the overlapping position of the wedge block 221 and one end of the plywood 222 to fix the two together to form a U-shaped workpiece 220 .

[0123] In step S6, the flipping drive cylinder 41 drives the flipping arm 43 to flip and open in the opposite direction, and the movable pressing mechanism 13 for the wedge block, the movable pressing mechanism 23 for the wedge block, the pressing mechanism 16 for the first plate, and the pressing mechanism 26 for the second plate respectively drive their movable pressure heads to move in the direction away from the corresponding fixed pressure heads, thereby opening the clamp 100, and then the processed U-shaped workpiece 220 can be taken out.

[0124] Functions and Effects of the Embodiments

[0125] The U-shaped workpiece processing fixture provided in this embodiment includes a first clamping unit, a second clamping unit, and a spacing adjustment unit. The first clamping unit can be used to press a wedge against one end of a plywood sheet in two horizontal directions, and the second clamping unit can be used to press another wedge against the other end of the plywood sheet in two horizontal directions. This allows for good positioning of the two wedges relative to the plywood sheet, facilitating processing operations such as nailing. During processing, their relative positions will not shift, which also helps improve the dimensional accuracy of the finished U-shaped workpiece. Furthermore, since the spacing adjustment unit is provided to adjust the spacing between the first clamping unit and the second clamping unit, plywood sheets of different lengths can be used for processing. This means that the fixture is suitable for manufacturing a variety of different types of U-shaped workpieces, eliminating the need for multiple sets of fixtures, saving equipment costs. There is no need to switch fixtures when changing production models; only the spacing between the two clamping units needs to be adjusted, making operation more convenient and increasing production efficiency.

[0126] In the embodiment, each clamping unit has multiple fixed pressure heads and multiple movable pressure heads, which can cooperate with each other to effectively press the wedge block and one end of the plywood. The fixed pressure heads also include a fixed pressure head for X-direction alignment and a fixed pressure head for Y-direction alignment. At the same time, the two sides of the wedge block can be aligned with the corresponding two sides of one end of the plywood.

[0127] Furthermore, the two clamping units are respectively provided with board supports at positions close to each other. Therefore, after placing a very long plywood, the middle part of the plywood can be supported by the two board supports to prevent the middle part from sagging due to gravity and affecting the processing accuracy of the two ends, which is conducive to further improving the accuracy of the finished product.

[0128] Furthermore, the height of the ram is at least half the height of the corresponding workpiece end face (or the total thickness of the stacked wedges and plywood). This allows the corresponding workpiece end face to be firmly pressed, preventing uneven force on the workpiece end face or even dislodgement due to a ram height that is too small. At the same time, the height of the ram is also less than the height of the corresponding workpiece end face or the aforementioned total thickness. Thus, after the ram and the corresponding workpiece end face are aligned with their center lines in the height direction, the upper and lower ends of the ram do not exceed the ends of the workpiece. This prevents interference with other components during movement, especially for movable rams.

[0129] Furthermore, the movable pressing mechanism for the wedge blocks in the two clamping units adopts a structural design with a high degree of coupling, so that the overall size of each clamping unit can be kept relatively small.

[0130] Furthermore, the spacing adjustment unit includes a moving guide rail, a limiting guide rail, a first unit locking component and a second unit locking component, so that the spacing between the two clamping units can be conveniently adjusted by sliding. After adjustment, the corresponding locking components can be used to lock the positions of the two to avoid positional displacement during processing and ensure the accuracy of the finished product.

[0131] Furthermore, detection sensors and relay components are respectively provided in the two clamping units, thereby enabling automatic control of the clamping and positioning of the workpiece.

[0132] Furthermore, nailing auxiliary units are respectively provided next to the two clamping units, which can flip the nailing positioning auxiliary parts with nailing positioning holes to the top of the clamping units by flipping. Therefore, it can play an auxiliary role when using a nail gun for nailing, and conveniently locate the position where nails should be placed on the overlapping part of the wedge block and one end of the plywood, making the nailing operation more efficient.

[0133] The above embodiments are merely examples of specific implementation methods of the present invention, and the present invention is not limited to the scope of the description of the above embodiments. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A U-shaped workpiece processing fixture, used to process two square column-shaped wedges and rectangular plate-shaped plywood into a U-shaped workpiece, characterized in that: include: A first clamping unit is used to press one of the wedges and one end of the plywood in two mutually perpendicular horizontal directions to fix their relative positions; a second clamping unit, for pressing the other wedge and the other end of the plywood together along the two horizontal directions to fix their relative positions; and The spacing adjustment unit is used to adjust the spacing between the first clamping unit and the second clamping unit.

2. The U-shaped workpiece processing fixture according to claim 1, Its characteristics are: Wherein, the first clamping unit includes: A plurality of first fixed pressure heads, including an X-direction alignment fixed pressure head and a first Y-direction alignment fixed pressure head, each having a pressing surface perpendicular to the x-axis direction and the y-axis direction; A movable pressing mechanism for the first wedge block, comprising a plurality of first movable pressing heads, respectively corresponding to the plurality of first fixed pressing heads, for cooperating with the first movable pressing heads to press the wedge block; and The first plate pressing mechanism includes a first Y-direction plate movable pressing head having a pressing surface perpendicular to the Y-axis direction and movable along the Y-axis direction. The second clamping unit includes: a plurality of second fixed pressure heads, including a second Y-alignment fixed pressure head having a pressing surface perpendicular to the Y-axis direction; A movable pressing mechanism for the second wedge block, comprising a plurality of second movable pressing heads, respectively corresponding to the plurality of second fixed pressing heads, for cooperating therewith to press the wedge block; and The second plate pressing mechanism includes a movable pressure head for the X-axis plate and a second movable pressure head for the Y-axis plate, which respectively have pressing surfaces perpendicular to the x-axis direction and the y-axis direction, and can move along the x-axis direction and the y-axis direction respectively. The movable pressure head for the X-axis plate is used to cooperate with the fixed pressure head for X-axis alignment to press the plywood along the x-axis direction, and the first movable pressure head for the Y-axis plate and the second movable pressure head for the Y-axis plate are used to cooperate with the first fixed pressure head for Y-axis alignment and the second fixed pressure head for Y-axis alignment to press the plywood along the y-axis direction.

3. The U-shaped workpiece processing fixture according to claim 2, characterized in that: in, The first clamping unit further includes a first loading plate, the upper surface of which is a plane. The plurality of first fixed pressure heads are all fixed on the upper surface of the first loading plate, and the plurality of first movable pressure heads are all located above the first loading plate. A first wedge placement portion is formed between the pressing surfaces of the plurality of first fixed pressing heads, the pressing surfaces of the plurality of first movable pressing heads, and the upper surface of the first mounting plate, for placing one of the wedges. The second clamping unit further includes a second loading plate, the upper surface of which is a plane. The plurality of second fixed pressure heads are all fixed on the upper surface of the first loading plate, and the plurality of second movable pressure heads are all located above the second loading plate. A second wedge placement portion is formed between the pressing surfaces of the plurality of second fixed pressing heads, the pressing surfaces of the plurality of second movable pressing heads, and the upper surface of the second mounting plate for placing another wedge.

4. The U-shaped workpiece processing fixture according to claim 3, characterized in that: in, The first clamping unit further includes a first plate support member, which is arranged on a side of the upper surface of the first loading plate close to the second clamping unit, and the upper surface of the first plate support member is a plane. The second clamping unit further includes a second plate support member, which is arranged on a side of the upper surface of the second loading plate close to the first clamping unit, and the upper surface of the second plate support member is a plane. A plywood placement portion is formed between multiple pressing surfaces of the fixed pressure head for X-direction alignment, the first fixed pressure head for Y-direction alignment, the second fixed pressure head for Y-direction alignment, the movable pressure head for the X-direction plate, the first movable pressure head for the Y-direction plate, the second movable pressure head for the Y-direction plate, and the upper surface of the first plate support member and the upper surface of the second plate support member, for placing one of the plywood.

5. The U-shaped workpiece processing fixture according to claim 4, characterized in that: in, The first plate pressing mechanism further includes a first plate driving cylinder, and the first Y-direction plate movable pressing head is provided on the end of the piston rod of the first plate driving cylinder. The second plate clamping mechanism also includes a second plate driving cylinder and a third plate driving cylinder. The second Y-direction plate movable pressure head is arranged on the end of the piston rod of the second plate driving cylinder, and the X-direction plate movable pressure head is arranged on the end of the piston rod of the third plate driving cylinder.

6. The U-shaped workpiece processing fixture according to claim 5, characterized in that: Also includes: Electronic control unit, including sensor components and relay components, Wherein, the sensor assembly includes: a first wedge block detection sensor fixed on the lower surface of the first loading plate, with a detection end thereof passing through a through hole in the first loading plate toward the first wedge block placement portion, for detecting whether a wedge block is placed in the first wedge block placement portion; a second wedge block detection sensor fixed on the lower surface of the second loading plate, with its detection end directed toward the second wedge block placement portion through a through hole in the second loading plate, for detecting whether another wedge block is placed in the second wedge block placement portion; and The first plywood detection sensor and the second plywood detection sensor are respectively arranged on the edges of the first loading plate and the second loading plate close to each other, with their detection ends facing the plywood placement portion, for detecting whether the plywood is placed in the plywood placement portion. The relay assembly includes a plurality of relays, which are respectively used to control at least the first plate driving cylinder, the second plate driving cylinder, and the third plate driving cylinder.

7. The U-shaped workpiece processing fixture according to claim 5, characterized in that: in, The first plate driving cylinder, the second plate driving cylinder, and the third plate driving cylinder have piston rods whose ends are respectively covered with sheet-shaped cylinder protection members. The first fixed ram, the second fixed ram, the first movable ram, the second movable ram, the first Y-plate movable ram, the second Y-plate movable ram, the X-plate movable ram, and the cylinder protection member are all made of stainless steel.

8. The U-shaped workpiece processing fixture according to claim 5, characterized in that: in, The first clamping unit has a first unit bottom plate, The second clamping unit has a second unit bottom plate, The spacing adjustment unit includes: Two movable guide rails, the first clamping unit and the second clamping unit are slidably disposed on the two movable guide rails respectively; Two position-limiting guide rails are respectively arranged on the outer sides of the plurality of movement guide rails; a spacing maintaining component, disposed between the first unit bottom plate and the second unit bottom plate, and configured to abut against the first unit bottom plate and the second unit bottom plate to maintain the spacing; Two first unit locking components, provided on one end of the two movable guide rails, for cooperating with the spacing maintaining components to fix the position of the first clamping unit; and The two second unit locking components are movably arranged on the two position-limiting guide rails, and are used to fix the position of the first clamping unit by clamping both sides of the first unit bottom plate.

9. The U-shaped workpiece processing fixture according to claim 8, characterized in that: in, The first unit locking component includes a bracket plate provided on one end of the guide rail and an adjusting bolt adjustably provided on the bracket plate, wherein the tail of the adjusting bolt faces one side of the first unit bottom plate. The second unit locking component includes a ball handle movably arranged on the limiting guide rail and a clamping plate connected to the ball handle. The clamping plates of the two second unit locking components are used to cooperate and clamp the opposite sides of the second unit base plate.

10. The U-shaped workpiece processing fixture according to claim 4, characterized in that: Also includes: Two nailing auxiliary units are respectively arranged beside the first clamping unit and the second clamping unit, and are used to cooperate with the nail gun to nail the overlapping part of the wedge block and one end of the plywood clamped and fixed by the first clamping unit or the second clamping unit. Wherein, the nailing auxiliary unit includes: a flip driving cylinder; a turning arm connected to the turning drive cylinder via a corresponding transmission assembly and capable of turning relative to the plywood placement portion; and The nail positioning auxiliary piece is arranged on the outer end of the flip arm and has one or more nail positioning holes for indicating the position to be nailed on the overlapping part.

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