Positioning and clamping fixture and positioning and clamping device

Abstract

The application discloses a positioning and clamping jig and a positioning and clamping device. The positioning and clamping jig comprises a supporting mechanism for supporting a workpiece and a clamping mechanism for clamping the workpiece supported on the supporting mechanism. The clamping mechanism comprises a first clamping unit capable of clamping the workpiece in a first direction and a first driving unit for driving the first clamping unit to clamp the workpiece. The first clamping unit comprises a first moving clamping part and a second moving clamping part symmetrically arranged on two opposite sides of the supporting mechanism in the first direction. The first driving unit comprises a first driving assembly and a second driving assembly for respectively driving the first moving clamping part and the second moving clamping part to move towards each other in the first direction to clamp the workpiece. The driving strokes of the first driving assembly and the second driving assembly are consistent. The positioning and clamping jig and the positioning and clamping device can improve the clamping positioning precision.

Description

Technical Field

[0001] This invention relates to the field of workpiece positioning and clamping technology, and particularly to a positioning and clamping fixture and a positioning and clamping device. Background Technology

[0002] In various machining processes, it is usually necessary to use positioning and clamping fixtures to fix the workpiece, keeping it stationary during machining to ensure machining accuracy and yield. Traditional positioning and clamping fixtures are typically designed with a contour stage or contour groove to support the workpiece. One side of the contour stage or contour groove is designed with a fixed clamping block that remains stationary, while the opposite side is designed with a movable clamping block that can move towards and reset towards the fixed clamping block. The clamping and releasing of the workpiece is achieved by the reciprocating movement of the movable clamping block. This type of positioning and clamping fixture is suitable for workpieces with uniform dimensions or workpieces with low precision requirements. However, in actual operation, even workpieces from the same batch may have different dimensions due to machining tolerances (e.g., different widths or lengths). As long as the tolerances are within the allowable range, they can be considered good products. For workpieces with such size differences, if a unilateral moving clamping method is used, the position of the machined part will change after the workpieces of different sizes are clamped and positioned. However, the machining area of ​​the workpiece machining equipment does not change with the machined part of the workpiece. This results in the machining area of ​​the machining equipment and the machined part of the workpiece being eccentric or misaligned, leading to a reduction in machining accuracy.

[0003] For example, in the welding process of a first strip (or block) workpiece and a second strip (or block) workpiece, the first welding areas at both ends of the first strip workpiece need to be welded to the two second welding areas of the second strip workpiece. Before welding, the first strip workpiece is fixed on a positioning clamping fixture, then the second strip workpiece is placed on top of the first strip workpiece and horizontally positioned on the positioning clamping fixture. Finally, welding equipment is used to weld the first welding areas at both ends of the first strip workpiece to the two second welding areas of the second strip workpiece. Since the width and length of each first strip workpiece may vary within an acceptable range, if a traditional single-sided approach positioning clamping tool is used, when the widths are different, the center line (e.g., the center line parallel to the length direction) of each first strip workpiece after being positioned and clamped may not be on the same line, resulting in a large misalignment when the first welding areas at both ends of the first strip workpiece are welded to the second strip workpiece. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a positioning clamping fixture and positioning clamping device with higher clamping and positioning accuracy.

[0005] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a positioning and clamping fixture, including a support mechanism for supporting a workpiece and a clamping mechanism for clamping the workpiece supported on the support mechanism. The clamping mechanism includes a first clamping unit capable of clamping the workpiece along a first direction and a first driving unit for driving the first clamping unit to clamp the workpiece. The first clamping unit includes a first movable clamping part and a second movable clamping part symmetrically arranged on two opposite sides of the support mechanism along the first direction. The first driving unit includes a first driving component and a second driving component for respectively driving the first movable clamping part and the second movable clamping part to move towards each other along the first direction to clamp the workpiece. The driving strokes of the first driving component and the second driving component are consistent.

[0006] Furthermore, the sides of the first and second movable clamping portions that are far apart from each other along the first direction are defined as symmetrically arranged first inclined surfaces, and the two first inclined surfaces are inclined along a second direction perpendicular to the first direction and in opposite or opposite directions; both the first and second driving components include a first pushing portion and a first driving portion for driving the first pushing portion to reciprocate along the first direction, and the sides of the two first pushing portions that are close to each other along the first direction are defined as symmetrically arranged second inclined surfaces that slide in cooperation with the first inclined surfaces; when the two first pushing portions move forward along the second direction, the two second inclined surfaces press against the first inclined surface to drive the first and second movable clamping portions to move towards each other, and when the two first pushing portions move in opposite directions along the second direction, the two first pushing portions release the pressing force on the first inclined surface so that the first and second movable clamping portions can move in opposite directions;

[0007] A first elastic member is provided between the first movable clamping part and the second movable clamping part. When the two second inclined surfaces press against the first inclined surface, the first movable clamping part and the second movable clamping part move towards each other and compress the first elastic member. When the two first pushing parts release the pressure on the first inclined surface, the first elastic member extends to reset the first movable clamping part and the second movable clamping part to move in opposite directions.

[0008] Furthermore, the first driving unit includes a first moving shaft capable of reciprocating along the second direction, and the first moving shaft is connected to the first pushing unit; when the first moving shaft moves forward along the second direction, the first moving shaft drives the first pushing unit connected to it to move forward to clamp the workpiece, and when the first moving shaft moves backward along the second direction, the first moving shaft drives the first pushing unit to move backward to release the workpiece;

[0009] The first driving unit further includes a first limiting part spaced apart from the first pushing unit along the second direction. The first limiting part is used to limit the reciprocating travel of the first pushing unit. The first limiting part includes a first limiting block and a second elastic member. The first limiting block has a first through hole through which the first moving shaft moves along the second direction. One end of the second elastic member abuts against the first limiting block and the other end abuts against the first pushing unit. When the first moving shaft moves forward along the second direction, it drives the first pushing unit to move away from the first limiting block to push the first moving clamping part and the second moving clamping part to move towards each other. The second elastic member extends after losing force. When the first moving shaft moves backward along the second direction, it drives the first pushing part to move closer to the first limiting block and compress the second elastic member. After the second elastic member is compressed, it restricts the first pushing part from continuing to move to prevent its second inclined surface from disengaging from the first inclined surface of the corresponding moving clamping part.

[0010] Furthermore, the support mechanism, the first drive assembly, and the second drive assembly are all mounted on a first assembly plate; the first assembly plate has a first assembly groove distributed along the second direction, and the support mechanism is mounted in the first assembly groove along the second direction; the first assembly plate also has a second assembly groove and a third assembly groove disposed on both sides of the first assembly groove along the first direction, a first boss is formed between the second assembly groove and the first assembly groove, and a second boss is formed between the third assembly groove and the first assembly groove; the first movable clamping part and the second movable clamping part are respectively placed on the first boss and the second boss and can move along the first direction; the first drive assembly and the second drive assembly are respectively disposed in the second assembly groove and the third assembly groove;

[0011] Both of the first driving parts are connected to the output shaft of a first power unit; the first mounting plate has a through groove at the position corresponding to the two first pushing parts, which passes through the first boss and the second boss in a first direction, and a first connecting part for connecting the two first pushing parts is movably disposed in the through groove.

[0012] Furthermore, the support mechanism has a clearance space that extends through the support mechanism along the first direction at the positions corresponding to the first and second movable clamping parts. The clearance space divides the support mechanism into two mutually spaced support platforms. The two ends or sides of the workpiece are respectively placed on the two support platforms, and the middle section of the workpiece is suspended above the clearance space. The first and second movable clamping parts are used to clamp the two opposite sides of the middle section of the workpiece.

[0013] Both support platforms have support portions for placing the two ends or sides of the workpiece thereon. Both support portions have a support plane and a supporting surface. The distance between the two supporting surfaces is greater than the dimension of the workpiece in the corresponding direction. The clamping mechanism further includes a second clamping unit capable of clamping the workpiece along a second direction and a second driving unit for driving the second clamping unit to clamp the workpiece. The second clamping unit is defined as a third movable clamping portion movably disposed at one of the support platforms. The second driving unit is used to drive the third movable clamping portion to move along the second direction toward the supporting surface of the other support platform to cooperate with it in clamping the workpiece.

[0014] Furthermore, the direction in which the workpiece extends along the second direction is defined as the length direction of the workpiece, and the direction in which it extends along the first direction is defined as the width direction of the workpiece. The two ends of the workpiece along the length direction are respectively supported on the two support platforms. The workpiece has a wider wide section, two narrower narrow sections extending outward from the two ends of the wide section, a vertical section extending vertically upward from each narrow section, and a planar section extending horizontally outward from each vertical section. The support planes of the two support parts are respectively used to support the two planar sections, and the inner vertical surfaces of the two support planes form the abutting vertical surfaces. The distance between the two abutting vertical surfaces is greater than the distance between the two vertical sections.

[0015] Both of the support platforms also have a second limiting part formed inside the support portion for limiting the workpiece along the width direction of the workpiece; a gap space is formed between the second limiting part of one of the support platforms and the abutting surface of the support platform, and the third movable clamping part is movably disposed in the gap space along the second direction.

[0016] Two L-shaped notches are formed between the end face of the wide section and the side face of each of the narrow sections; the third movable clamping part includes two clamping blocks that conform to the two L-shaped notches and a connecting block connected between the two clamping blocks, the connecting block being located below the workpiece; the second driving unit includes a third driving assembly and a fourth driving assembly disposed on both sides of the support mechanism along the first direction, the third driving assembly and the fourth driving assembly each including a second pushing part and a second driving part, the two second pushing parts being respectively connected to both sides of the third movable clamping part along the first direction, the two second driving parts being used to simultaneously drive the two second pushing parts to reciprocate along the second direction; when the two second pushing parts move forward along the second direction, they cause the third movable clamping part to release the workpiece, when the two second driving parts move in the opposite direction along the second direction, they cause the third movable clamping part to move towards the other abutting surface to cooperate with it to clamp the workpiece.

[0017] Furthermore, the second driving unit includes a second moving shaft capable of reciprocating along a second direction, and the second moving shaft is connected to the second pushing unit; when the second moving shaft moves forward along the second direction, the second moving shaft drives the second pushing unit connected to it to move forward to release the workpiece, and when the second moving shaft moves backward along the second direction, the second moving shaft drives the second pushing unit to move backward to clamp the workpiece;

[0018] The second driving part further includes a third limiting part spaced apart from the second pushing part along the second direction. The third limiting part is used to limit the reciprocating stroke of the second pushing part. The third limiting part includes a second limiting block and a third elastic member. The second limiting block has a second through hole through which the second moving shaft moves along the second direction. One end of the third elastic member abuts against the second limiting block and the other end abuts against the second pushing part. When the second moving shaft moves forward along the second direction, it drives the second pushing part to move towards the second limiting block and compresses the third elastic member. When the second moving shaft moves backward along the second direction, the third elastic member extends to move the second pushing part towards another supporting surface. The second pushing part drives the third moving clamping part to move towards another supporting surface to clamp the workpiece.

[0019] Furthermore, the third drive assembly and the fourth drive assembly are mounted on a second assembly plate; the second assembly plate has a fourth assembly slot and a fifth assembly slot disposed on both sides of the support mechanism along the first direction, and the fourth assembly slot and the fifth assembly slot are distributed on the second assembly plate along the second direction. The second drive parts of the third drive assembly and the fourth drive assembly are respectively disposed in the fourth assembly slot and the fifth assembly slot; a third protrusion is formed between the fourth assembly slot and the fifth assembly slot, and a vertically penetrating first assembly cavity is formed on the third protrusion at the position corresponding to the two support platforms. The two support platforms are respectively inserted into the two first assembly cavities along the vertical direction. A vertically penetrating second assembly cavity is formed on the second assembly plate at the position corresponding to the first moving clamping part and the second moving clamping part. The second assembly cavity is connected to the clearance space, the fourth assembly slot and the fifth assembly slot along the first direction. Two third assembly cavities are formed on the third protrusion at the position corresponding to the two second pushing parts. The opposite ends of the two third assembly cavities along the first direction are connected to a corresponding first assembly cavity, and the ends that are far apart from each other are connected to the fourth assembly slot and the fifth assembly slot, respectively.

[0020] The workpiece is defined as a first strip workpiece, and the clamping mechanism is used to clamp the first strip workpiece along a first direction and a second direction. The upper surfaces of both ends of the first strip workpiece are welded to the lower surfaces of a second strip workpiece. The second strip workpiece has an overhanging portion that extends beyond the first strip workpiece along the first direction and / or the second direction. A first horizontal limiting portion for restricting the horizontal movement of the second strip workpiece is provided on the second assembly plate at a position corresponding to the overhanging portion.

[0021] Furthermore, the workpiece is defined as multiple groups, and the number of the support mechanism, the first clamping unit, and the second clamping unit is defined as a number greater than or equal to the number of workpiece groups. The first driving unit is used to drive the multiple groups of first clamping units to simultaneously clamp or release the corresponding workpieces along a first direction; the second driving unit is used to drive the multiple groups of second clamping units to clamp or release the corresponding workpieces along a second direction.

[0022] To solve the above-mentioned technical problems, the present invention provides a positioning and clamping device, including a clamping mechanism and a positioning and clamping fixture disposed on the clamping mechanism; the positioning and clamping fixture includes a support mechanism for supporting a workpiece and a clamping mechanism for clamping the workpiece supported on the support mechanism; the clamping mechanism includes a first clamping unit capable of clamping the workpiece along a first direction and a first driving unit for driving the first clamping unit to clamp the workpiece; the first clamping unit includes a first movable clamping part and a second movable clamping part symmetrically disposed on two opposite sides of the support mechanism along the first direction; the first driving unit includes a first driving component and a second driving component for respectively driving the first movable clamping part and the second movable clamping part to move towards each other along the first direction to clamp the workpiece; the driving stroke of the first driving component and the second driving component is the same; the clamping mechanism further includes a second clamping unit capable of clamping the workpiece along a second direction and a second driving unit for driving the second clamping unit to clamp the workpiece; the clamping mechanism is provided with a first power unit for connecting to the input end of the first driving unit and a second power unit for connecting to the input end of the second driving unit.

[0023] The positioning and clamping fixture and positioning and clamping device of the present invention have at least the following beneficial effects: (i) It changes the traditional clamping method and proposes a double-sided simultaneous clamping method, so that the center line of each workpiece can be aligned, thereby improving the clamping position accuracy; (ii) In addition to the double-sided clamping, there is also a single-sided abutment clamping method in the vertical direction, which ensures that each workpiece has the same single-sided reference while the center line is aligned, thereby further improving the clamping position accuracy; (iii) Each fixture can assemble multiple sets of workpieces at the same time, and can realize the function of simultaneously positioning and clamping multiple sets of workpieces, thereby increasing efficiency many times over; (iv) Multiple sets of first clamping units realize clamping and releasing through multiple sets of first pushing parts connected in series on the first moving shaft, and multiple sets of second clamping units realize clamping and releasing through multiple sets of second pushing parts connected in series on the second moving shaft, thereby realizing the function of clamping or releasing multiple sets of workpieces at the same time with one drive, thereby increasing efficiency many times over; (v) Even if the absolute size difference of multiple sets of workpieces on the same fixture is caused by machining tolerance, their center lines can still be aligned and their single-sided references can be consistent. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the first strip-shaped workpiece.

[0026] Figure 2 This is a schematic diagram of the structure of the second strip-shaped workpiece.

[0027] Figure 3 This is a clamping state diagram of one embodiment of the positioning and clamping fixture of the present invention.

[0028] Figure 4 This is a schematic diagram of one embodiment of the positioning and clamping fixture of the present invention.

[0029] Figure 5 This is an assembly diagram of the support mechanism, the first clamping unit, the first driving unit, and the first assembly plate in one embodiment of the positioning and clamping fixture of the present invention.

[0030] Figure 6 This is a schematic diagram of the assembly of a first assembly plate with a portion of a support mechanism, a portion of a first clamping unit, a portion of a third moving clamping part, and a portion of a first driving unit in one embodiment of the positioning and clamping fixture of the present invention. The first clamping unit, support mechanism, and third moving clamping part on the left side are hidden in the figure, as are the support mechanism and third moving clamping part in the middle.

[0031] Figure 7This is a schematic diagram of the assembly of the second assembly plate with a portion of the support mechanism, a portion of the first clamping unit, a portion of the third moving clamping part, and a portion of the second driving unit in one embodiment of the positioning and clamping fixture of the present invention. The first clamping unit, support mechanism, and third moving clamping part on the left side are hidden in the figure, as are the support mechanism and third moving clamping part in the middle.

[0032] Figure 8 This is a schematic diagram of the support mechanism in one embodiment of the positioning and clamping fixture of the present invention.

[0033] Figure 9 This is a clamping state diagram of the first driving unit and the first clamping unit in one embodiment of the positioning and clamping fixture of the present invention.

[0034] Figure 10 This is a clamping state diagram of the second driving unit and the second clamping unit in one embodiment of the positioning and clamping fixture of the present invention.

[0035] Figure 11 yes Figure 10 A magnified view of part B in the middle.

[0036] Figure 12 This is a schematic diagram of one embodiment of the positioning and clamping device of the present invention.

[0037] Figure 13 yes Figure 12 A schematic diagram of the clamping mechanism.

[0038] The meanings of the labels in the attached diagram are as follows:

[0039] First strip-shaped workpiece A1; wide section A101; narrow section A102; vertical section A103; flat section A104; L-shaped notch A105; second strip-shaped workpiece A2; material frame A3; limiting hole A31;

[0040] First assembly plate 100; first assembly slot 110; second assembly slot 120; third assembly slot 130; first boss 140; second boss 150; through slot 160;

[0041] Second assembly plate 200; fourth assembly slot 210; fifth assembly slot 220; third boss 230; first horizontal limiting part 231; first assembly cavity 232; second assembly cavity 233; third assembly cavity 234;

[0042] Support mechanism 300; clearance space 310; support platform 320; support plane 321; supporting facade 322; first limiting wall 323; second limiting wall 324; first limiting space 325; interval space 326; second limiting space 327; third limiting space 328; base 330;

[0043] First clamping unit 400; first movable clamping part 410; first inclined surface 411; second movable clamping part 420; first inclined surface 421; first elastic element 430;

[0044] First drive unit 500; first connecting part 50; first drive assembly 5a; first pushing part 50a; second inclined surface 501a; first moving shaft 51a; first stop head 511a; first limiting part 52a; first limiting block 521a; second elastic element 522a; first through hole 523a; insertion slot 524a; slide rail 53a; slider 54a; second drive assembly 5b; first pushing part 50b; second inclined surface 501b; first moving shaft 51b; first stop head 511b; first limiting part 52b; first limiting block 521b; second elastic element 522b; first through hole 523b; insertion slot 524b; slide rail 53b; slider 54b;

[0045] Third movable clamping part 600; clamping block 610; connecting block 620;

[0046] Second drive unit 700; third drive assembly 7a; second push part 70a; connecting part 701a; second moving shaft 71a; second stop head 711a; third limiting part 72a; second limiting block 721a; main body block 7211a; fixing block 7212a; third elastic element 722a; second through hole 723a; fourth drive assembly 7b; second push part 70b; connecting part 701b; second moving shaft 71b; second stop head 711b; third limiting part 72b; second limiting block 721b; main body block 7211b; fixing block 7212b; third elastic element 722b; second through hole 723b;

[0047] Clamping mechanism 800; base plate 810; clamping plate 820; second horizontal limiting part 821; first power unit 830; hinge seat 831; quick clamp 832; power shaft 833; connector 834; second connecting part 8341; second power unit 840; hinge seat 841; quick clamp 842; power shaft 843; connector 844; second connecting part 8441. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0051] Please see Figure 1 and Figure 2 This invention describes a positioning and clamping fixture using a first strip workpiece and a second strip workpiece as one embodiment. To more clearly and completely describe the positioning and clamping fixture of this invention, the structural shapes of the first strip workpiece A1 and the second strip workpiece A2 will be described first before describing the positioning and clamping fixture.

[0052] The widths of the first strip workpiece A1 and the second strip workpiece A2 extend along the first direction (the Y-axis direction in the figure). Therefore, the direction in which the first strip workpiece A1 and the second strip workpiece A2 extend along the first direction is defined as the width direction of the workpiece. The lengths of the first strip workpiece A1 and the second strip workpiece A2 extend along the second direction (the X-axis direction in the figure). Therefore, the direction in which the first strip workpiece A1 and the second strip workpiece A2 extend along the second direction is defined as the length direction of the workpiece. The first strip-shaped workpiece A1 has a wide surface segment A101, two narrow surface segments A102 extending outward from both ends of the wide surface segment A101, a vertical surface segment A103 extending vertically upward from each narrow surface segment A102, and a horizontal surface segment A104 extending horizontally outward from each vertical surface segment A103. The wide surface segment A101, narrow surface segment A102, vertical surface segment A103, and horizontal surface segment A104 all have the same center line on the horizontal projection plane. The widths of the narrow surface segment A102, vertical surface segment A103, and horizontal surface segment A104 are defined to be consistent and all smaller than the width of the wide surface segment A101. Furthermore, L-shaped notches A105 are formed between the two transverse sides (two sides along the width direction) of the narrow surface segment A102 and the corresponding end faces (two sides along the length direction) of the wide surface segment A101. The upper surfaces of the two planar segments A104 of the first strip workpiece A1 form two first welding areas, which are used for welding to the corresponding parts of the second strip workpiece A2.

[0053] The second strip workpiece A2 is sized to match the first strip workpiece A1. Two second welding areas are formed on the lower surface of the second strip workpiece A2 at positions corresponding to the two first welding areas. When welding the first strip workpiece A1 and the second strip workpiece A2, the first strip workpiece A1 is first fixed to the positioning clamping fixture of this embodiment. Then, the second strip workpiece A2 is placed on top of the first strip workpiece A1 and horizontally positioned on the positioning clamping fixture so that the first and second welding areas overlap. Finally, the first strip workpiece A1 and the second strip workpiece A2 are welded together using welding equipment. The second strip workpiece A2 can be formed by stamping a strip of material. After stamping, the strip forms a frame A3. The frame A3 and both ends of the second strip workpiece A2 can be connected using a pre-cut or breakpoint connection. That is, the second strip workpiece A2 does not completely detach from the frame A3 after being stamped, so that the frame A3 serves as the portion extending beyond the first strip workpiece A1 along the first direction and / or the second direction. This extended portion serves as the limiting portion of the second strip workpiece A2 and is horizontally limited on the positioning and clamping fixture. In a specific implementation, a strip can be stamped with several second strip workpieces A2 along the second direction, thereby forming several frames A3 and several second strip workpieces A2 placed in the frames A3 one-to-one. Each frame A3 serves as the corresponding extended portion, and at least two limiting holes A31 can be machined on the extended portion to serve as the limiting portion of the second strip workpiece A2.

[0054] In the illustrated embodiment, the positioning and clamping fixture is used to position and clamp the first strip-shaped workpiece A1 and to horizontally limit the second strip-shaped workpiece A2. Furthermore, the positioning and clamping fixture is used to clamp several first strip-shaped workpieces A1 and horizontally limit several second strip-shaped workpieces A2, such as the three first strip-shaped workpieces A1 and three second strip-shaped workpieces A2 shown in the figure. It should be understood that the positioning and clamping fixture is not limited to positioning and clamping the first strip-shaped workpiece A1 in the illustrated embodiment. This positioning and clamping fixture is suitable for various shapes of workpieces that require simultaneous clamping on both sides, consistent travel during clamping, and ensure that the centerline of each clamped workpiece is located on the same reference centerline. For example, workpieces that can be centered along the width or length direction, such as cuboid / cube-shaped workpieces, block-shaped workpieces, etc. Therefore, in the following description, the term "first strip-shaped workpiece A1" will be replaced with "workpiece".

[0055] Please see Figure 3 , Figure 4 and Figure 5The positioning and clamping fixture includes a first assembly plate 100, a second assembly plate 200 mounted on the first assembly plate 100, a support mechanism 300 for supporting a workpiece mounted on the first assembly plate 100 and passing through the second assembly plate 200 in a vertical direction (Z-axis direction in the figure), and a clamping mechanism for clamping the workpiece supported on the support mechanism 300. The clamping mechanism includes a first clamping unit 400 capable of clamping the workpiece in a first direction and a first driving unit 500 for driving the first clamping unit 400 to clamp the workpiece. The first clamping unit 400 includes a first movable clamping part 410 and a second movable clamping part 420 symmetrically arranged on two opposite sides of the support mechanism 300 in a first direction. The first driving unit 500 includes a first driving component 5a and a second driving component 5b for respectively driving the first movable clamping part 410 and the second movable clamping part 420 to move towards each other in a first direction to clamp the workpiece. The driving strokes of the first driving component 5a and the second driving component 5b are the same. In the illustrated embodiment, the clamping mechanism further includes a second clamping unit capable of clamping the workpiece along a second direction and a second driving unit 700 for driving the second clamping unit to clamp the workpiece. The second clamping unit is defined as a third movable clamping portion 600 movably disposed on one side (e.g., the right side in the figure) of the support mechanism 300 along the second direction. The second driving unit 700 includes a third driving component 7a and a fourth driving component 7b. The fourth driving component 7b of the third driving component 7a is connected to both sides of the third movable clamping portion 600 along a first direction, for driving the third movable clamping portion 600 to move closer to the other opposite side of the support mechanism 300 along the second direction to cooperate in clamping the workpiece. The number of the support mechanism 300, the first clamping unit 400, and the second clamping unit is greater than or equal to the number of workpieces, preferably corresponding one-to-one with the workpieces. Continuing with the example of three sets of workpieces, the supporting mechanism 300, the first clamping unit 400, and the second clamping unit are all defined as three sets. The three sets of supporting mechanisms 300 support the three sets of workpieces in a one-to-one correspondence. The three sets of first clamping units 400 clamp the three sets of workpieces in a one-to-one correspondence along the first direction. The three sets of second clamping units clamp the three sets of workpieces in a one-to-one correspondence along the second direction. The first driving unit 500 is used to drive the plurality of sets of first clamping units 400 to simultaneously clamp or release the corresponding workpieces along the first direction; the second driving unit 700 is used to drive the plurality of sets of second clamping units to clamp or release the corresponding workpieces along the second direction.It should be understood that the first assembly plate 100 and the second assembly plate 200 serve only as carriers for assembling or loading the support mechanism 300 and the clamping mechanism in this embodiment. In other embodiments, the assembly or loading form of the support mechanism 300 and the clamping mechanism is not limited to the first assembly plate 100 and the second assembly plate 200. For example, the support mechanism 300 and / or the clamping mechanism can be directly supported on a platform, welding equipment, or processing equipment, etc. Or, the support mechanism 300 can be directly used as an independent load-bearing body, eliminating the need for a loading platform or equipment. In summary, the loading forms of the support mechanism 300 and the clamping mechanism are diverse and can be reduced or modified according to the needs of different embodiments, which will not be elaborated here.

[0056] Please see Figure 6 In the illustrated embodiment, the first assembly plate 100 has a first assembly groove 110, a second assembly groove 120, and a third assembly groove 130 spaced apart along the first direction. On the horizontal projection plane, the centerline of the first assembly groove 110 along the second direction coincides with the centerline of the first assembly plate 100. The first assembly groove 110 is used to accommodate three sets of support mechanisms 300 spaced apart along the second direction. The second assembly groove 120 and the third assembly groove 130 are located on the outer sides of the first assembly groove 110, i.e., the second assembly groove 120 and the third assembly groove 130 are arranged along the first direction on the outer sides of the first assembly groove 110. A first boss 140 is formed between the second assembly groove 120 and the first assembly groove 110, and a second boss 150 is formed between the third assembly groove 130 and the first assembly groove 110. The first assembly plate 100 is provided with a through groove 160 that passes through the first boss 140 and the second boss 150 along a first direction at the position corresponding to each first movable clamping part 410 and the second movable clamping part 420. The bottom of the through groove 160 is lower than the bottom of the first assembly groove 110. When the support mechanism 300 is assembled in the first assembly groove 110, the support mechanism 300 spans over the through groove 160 along a second direction, and a gap is formed between the bottom of the support mechanism 300 and the bottom of the through groove 160 (not shown in the figure).

[0057] Please see Figure 7In the illustrated embodiment, the second assembly plate 200 has a fourth assembly groove 210 and a fifth assembly groove 220 disposed on both sides of the support mechanism 300 along the first direction. Both the fourth assembly groove 210 and the fifth assembly groove 220 are distributed along the second direction on the second assembly plate 200. A third boss 230 is formed between the fourth assembly groove 210 and the fifth assembly groove 220. A first horizontal limiting part 231 for restricting the horizontal movement of the second strip workpiece A2 is provided on the third boss 230 at a position corresponding to the extended portion of the second strip workpiece A2. The first horizontal limiting part 231 can be defined as a limiting post or a limiting block. Vertically penetrating first assembly cavities 232 are formed on the third boss 230 at positions corresponding to the two support platforms. The two support platforms are respectively inserted into the two first assembly cavities 232 along the vertical direction and exposed on the second assembly plate 200. A vertically penetrating second assembly cavity 233 is formed on the second assembly plate 200 at a position corresponding to the first movable clamping part 410 and the second movable clamping part 420. The second assembly cavity 233 communicates with the first assembly cavity 232, the fourth assembly groove 210, the fifth assembly groove 220, and the clearance space of the support mechanism 300 described below along a first direction. On the horizontal projection plane, the first assembly cavity 232 and the second assembly cavity 233 are intersected in a "+" shape. Two third assembly cavities 234 are formed on the third boss 230 at a position corresponding to one of the first assembly cavities 232 (e.g., the one on the right). The two third assembly cavities 234 have opposite ends along the first direction that communicate with a corresponding first assembly cavity 232, and opposite ends that communicate with the fourth assembly groove 210 and the fifth assembly groove 220, respectively.

[0058] The support mechanism 300 is disposed in the first assembly groove 110 and extends upward from the first assembly cavity 232 through the second assembly plate 200. A clearance space 310 is formed on the support mechanism 300 at positions corresponding to the first movable clamping part 410 and the second movable clamping part 420, extending through the support mechanism 300 along the first direction. The clearance space 310 divides the support mechanism 300 into two mutually spaced support platforms 320. In the illustrated embodiment, both ends of the workpiece are respectively placed on the two support platforms 320, and the middle section of the workpiece is suspended above the clearance space 310. It should be understood that in other embodiments, the two sides of the workpiece may also be placed on the two support platforms 320 as needed.

[0059] Please see Figure 8The lower ends of the two support platforms 320 are connected as a whole by a base 330 to improve the integrity, consistency, and stability of the support mechanism 300 and improve assembly efficiency. Each of the lower end faces of the two support platforms 320 is provided with an assembly hole, and a self-resetting spring is provided in the assembly hole. The lower end of the self-resetting spring is connected to the bottom of the first assembly groove. Preferably, the bottom of the first assembly groove 110 is provided with a groove for assembling the self-resetting spring, and the lower end of the self-resetting spring is disposed in the groove.

[0060] Each of the two support platforms 320 has a support portion for placing the two ends or sides of the workpiece thereon. Each support portion has a support plane 321 and a supporting surface 322. The distance between the two supporting surfaces 322 is greater than the dimension of the workpiece in the corresponding direction. In the illustrated embodiment, adapted to the first strip workpiece A1, the two support planes 321 respectively support the two planar segments A104 of the first strip workpiece A1, and the two supporting surfaces 322 respectively abut against the vertical segment A103 of the first strip workpiece A1. Therefore, the support plane 321 of the support portion is located outside the supporting surface 322, and the inner surface of each support plane 321 forms the supporting surface 322. The distance between the two supporting surfaces 322 is greater than the distance between the two vertical segments A103.

[0061] Each of the two support platforms 320 also has a second limiting portion formed inside the support portion for limiting the workpiece along the width direction of the workpiece. Both second limiting portions can be defined as a first limiting wall 323 and a second limiting wall 324 disposed on both sides of the first strip workpiece A1 along a first direction. The first limiting wall 323 and the second limiting wall 324 of one of the second limiting portions (e.g., the one on the right in the figure) have a first limiting space 325 between them that is adapted to the wide section A101 of the first strip workpiece A1. The first limiting space 325 is used to coarsely limit one end of the wide section A101 (e.g., the right end in the figure). A gap space 326 is formed between one of the second limiting portions and the abutting surface 322 of the support platform 320. The aforementioned third movable clamping portion 600 is movably disposed in the gap space 326 along the second direction. Another second limiting part (e.g., a second limiting part on the left in the figure) has a second limiting space 327 adapted to the wide section A101 and a third limiting space 328 adapted to the narrow section A102 between the first limiting wall 323 and the second limiting wall 324. The second limiting space 327 and the third limiting space 328 are respectively used to coarsely limit the wide section A101 and the narrow section A102 at the other end (e.g., the left end in the figure) of the first strip workpiece A1.

[0062] Please continue reading. Figure 6 The first movable clamping part 410 and the second movable clamping part 420 are respectively disposed on the lateral sides of the clearance space 310 and pass through the second assembly cavity 233 to be exposed on the second assembly plate 200, for clamping the two opposite sides of the middle section of the workpiece along the first direction. Both the first movable clamping part 410 and the second movable clamping part 420 can be defined as a movable clamping block. The first movable clamping block and the second movable clamping block are disposed above the through groove 160 and respectively placed on the first boss 140 and the second boss 150 and are movable along the first direction. The first movable clamping block and the second movable clamping block can be defined as having the same structure and being mirror-shaped. The sides of the first movable clamping block and the second movable clamping block that are far apart from each other along the first direction are defined as symmetrically arranged first inclined surfaces 411 and 421. The two first inclined surfaces 411 and 421 are inclined in opposite or opposite directions along a direction perpendicular to the first direction. The direction perpendicular to the first direction is defined as the second direction described above. That is, the first inclined surfaces 411 and 421 are inclined along the second direction and in opposite directions. For example, in the figure, the first inclined surfaces 411 and 421 are inclined to the right and in opposite directions, so that the two first inclined surfaces 411 and 421 form an octagon. A first elastic element 430 is provided between the opposite sides of the first and second moving clamps along the first direction. The first elastic element 430 can be defined as a self-resetting spring (coil spring), and the two ends of the self-resetting spring abut against the first and second moving clamps respectively. When the first and second moving clamps move towards each other, the first elastic element 430 is compressed; when the first and second moving clamps release the compressive force on the first elastic element 430, the first elastic element 430 extends to reset the first and second moving clamps by moving in opposite directions.

[0063] Please see Figure 9The first driving component 5a and the second driving component 5b are respectively disposed in the second assembly slot 120 and the third assembly slot 130. The structures of the first driving component 5a and the second driving component 5b can be defined as identical and mirror-image. Both the first driving component 5a and the second driving component 5b include first pushing parts 50a and 50b and a first driving part for driving the first pushing parts 50a and 50b to reciprocate along a first direction. The first pushing parts 50a of the first driving component 5a and the first pushing parts 50b of the second driving component 5b are arranged in groups, with the number of groups corresponding one-to-one with the number of workpieces. In the illustrated embodiment, the number of workpieces is limited to three groups, therefore the first pushing parts 50a and 50b are configured in three groups (six). Each set of two first pushing parts 50a and 50b are connected as one unit by a first connecting part 50. The first connecting part 50 is movably disposed in the through groove 160 and passes through the bottom of the support mechanism 300, that is, through the gap formed between the support mechanism 300 and the through groove 160. In each set of two first pushing parts 50a and 50b, the side of the two first pushing parts 50a and 50b that are close to each other along the first direction is defined as a second inclined surface 501a and 501b that is symmetrically arranged and slides with the first inclined surfaces 411 and 421. When the two first inclined surfaces 411 and 421 are in the shape of an octagon, the two second inclined surfaces 501a and 501b are in the shape of an inverted octagon. When the two first pushing parts 50a and 50b move in the second direction (from left to right in the figure), the two second inclined surfaces 501a and 501b press against the first inclined surfaces 411 and 421 to drive the first moving clamping part 410 and the second moving clamping part 420 to move towards each other. When the two first pushing parts 50a and 50b move in the second direction in the opposite direction (from right to left in the figure), the two first pushing parts 50a and 50b release the pressing force on the first inclined surfaces 411 and 421 so that the first moving clamping part 410 and the second moving clamping part 420 can move and reset in opposite directions.

[0064] The first driving unit includes first moving shafts 51a and 51b disposed within corresponding second mounting slots 120 or third mounting slots 130 and capable of reciprocating along the second direction, and first limiting parts 52a and 52b spaced apart from the first pushing parts 50a and 50b along the second direction. A plurality of the first pushing parts 50a and 50b are connected in series along the first moving shafts 51a and 51b along the second direction. The input ends of the first moving shafts 51a and 51b of the first driving assembly 5a and the second driving assembly 5b are both connected to a first power unit, so that they move simultaneously and in the same direction under the drive of the first power unit. The first power unit can be an electric, pneumatic, hydraulic, or manual power unit. In a specific example, slide rails 53a and 53b distributed along the second direction are fixedly installed in both the second assembly groove 120 and the third assembly groove 130. Each slide rail 53a and 53b has a slider 54a and 54b slidably mounted on it, corresponding one-to-one with the number of first pushing parts 50a and 50b on the corresponding side. The first pushing parts 50a and 50b are correspondingly mounted on the sliders 54a and 54b. First moving shafts 51a and 51b pass through the first pushing parts 50a and 50b, and first stoppers 511a and 511b are provided on the first moving shafts 51a and 51b located outside one side of the first pushing parts 50a and 50b. When the first moving shafts 51a and 51b move forward along the second direction, they drive the first pushing parts 50a and 50b to move forward to clamp the workpiece. When the first moving shafts 51a and 51b move backward along the second direction, they drive the first blocking heads 511a and 511b to move backward. The first blocking heads 511a and 511b cause the first pushing parts 50a and 50b to move backward. The first elastic member 430 between the first moving clamping part 410 and the second moving clamping part 420 extends after losing force, so as to push the two moving clamping parts to move in opposite directions, thereby causing the two moving clamping parts to release the workpiece.

[0065] The number of the first limiting parts 52a and 52b corresponds one-to-one with the number of the first pushing parts 50a and 50b on the corresponding side, and is used to limit the reciprocating travel of the first pushing parts 50a and 50b. The first limiting parts 52a and 52b are disposed on the side of the first pushing parts 50a and 50b away from the first stop heads 511a and 511b and have a predetermined distance from the first pushing parts 50a and 50b. The first limiting portions 52a and 52b include first limiting blocks 521a and 521b fixed in the corresponding second assembly groove 120 or third assembly groove 130, and second elastic members 522a and 522b. The first limiting blocks 521a and 521b have first through holes 523a and 523b through which the first moving shafts 51a and 51b move along the second direction. One end of the second elastic members 522a and 522b abuts against the first limiting blocks 521a and 521b, and the other end abuts against the first pushing portions 50a and 50b. In the illustrated embodiment, to facilitate the assembly of the first moving shafts 51a and 51b and the first limiting blocks 521a and 521b, the first through holes 523a and 523b may be defined to also penetrate the upper surface of the first limiting blocks 521a and 521b in a vertical direction. The first limiting blocks 521a and 521b have insertion slots 524a and 524b on one side facing the first pushing parts 50a and 50b, into which the second elastic members 522a and 522b are inserted. The second elastic members 522a and 522b are defined as self-resetting springs. The self-resetting springs are arranged around the first moving shafts 51a and 51b, and one end of the self-resetting spring is inserted into the insertion slots 524a and 524b, while the other end abuts against the first pushing parts 50a and 50b. When the first moving shafts 51a and 51b move forward along the second direction, they drive the first pushing parts 50a and 50b to move away from the first limiting blocks 521a and 521b, thereby pushing the first moving clamping part 410 and the second moving clamping part 420 to move towards each other. The second elastic members 522a and 522b extend after losing force (compression force). When the first moving shafts 51a and 51b move in the opposite direction along the second direction, they drive the first pushing parts 50a and 50b to approach the first limiting blocks 521a and 521b and compress the second elastic members 522a and 522b. After the second elastic members 522a and 522b are compressed, they restrict the first pushing parts 50a and 50b from continuing to move, preventing their second inclined surfaces 501a and 501b from disengaging from the first inclined surfaces 411 and 421 of the corresponding moving clamping parts.

[0066] Please see Figure 10 and Figure 11The third movable clamping part 600 is movably disposed at the interval space 326 along the second direction. It includes two clamping blocks 610 that are conformed to the two L-shaped notches A105 and a connecting block 620 connected between the two clamping blocks 610. The connecting block 620 is located below the workpiece to avoid the workpiece.

[0067] The third drive assembly 7a and the fourth drive assembly 7b are respectively disposed on the second assembly plate 200 and located on both sides of the support mechanism 300 along the first direction. The structures of the third drive assembly 7a and the fourth drive assembly 7b can be defined to be identical and mirror-image arranged, each including second pushing parts 70a and 70b and a second drive part for driving the second pushing parts 70a and 70b to reciprocate along the second direction. The second pushing parts 70a of the third drive assembly 7a and the second pushing parts 70b of the fourth drive assembly 7b are arranged in groups, and the number of groups corresponds one-to-one with the number of workpieces. In the embodiment shown, the number of workpieces is limited to three groups, so the second pushing parts 70a and 70b are configured in three groups (six). The two second pushing parts 70a and 70b of each group are respectively connected to the two sides of the third moving clamping part 600 along the first direction. For example, the two second pushing parts 70a and 70b are respectively connected to the two sides of the connecting block 620. The two second driving parts of each group are movably disposed in the corresponding third assembly cavity 234 and have connecting parts 701a and 701b extending into the corresponding fourth assembly groove 210 or fifth assembly groove 220 along the first direction. The connecting parts 701a and 701b are connected to the second driving parts. Two second driving parts are respectively disposed in the fourth assembly groove 210 and the fifth assembly groove 220, for simultaneously driving the two second pushing parts 70a and 70b to reciprocate along the second direction; when the two second pushing parts 70a and 70b move forward along the second direction, they drive the third moving clamping part 600 to release the workpiece; when the two second driving parts move in the opposite direction along the second direction, they drive the third moving clamping part 600 to move towards the other abutting surface 322 to cooperate with it to clamp the workpiece.

[0068] Each of the second driving units includes a second moving shaft 71a, 71b disposed in a corresponding fourth assembly slot 210 or fifth assembly slot 220 and capable of reciprocating along a second direction. A plurality of second pushing units 70a, 70b are connected in series along the second direction to the second moving shaft 71a, 71b. In the illustrated embodiment, the connecting portions 701a, 701b of the second pushing units 70a, 70b are sleeved on the second moving shaft 71a, 71b. When the second moving shaft 71a, 71b moves forward along the second direction, the second moving shaft 71a, 71b drives the connected second pushing units 70a, 70b to move forward to release the workpiece. When the second moving shaft 71a, 71b moves backward along the second direction, the second moving shaft 71a, 71b drives the second pushing units 70a, 70b to move backward to clamp the workpiece. The input ends of the second moving shafts 71a and 71b of the third drive assembly 7a and the fourth drive assembly 7b are both connected to a second power unit, so that they move simultaneously and in the same direction under the drive of the second power unit. The second power unit can be an electric, pneumatic, hydraulic, or manual power unit. The second moving shafts 71a and 71b and the second pushing parts 70a and 70b can be slidably disposed in the corresponding fourth assembly slot 210 or fifth assembly slot 220 in the same or similar manner as the first moving shafts 51a and 51b and the first pushing parts 50a and 50b. Each second drive unit also includes third limiting parts 72a and 72b that are spaced apart from the connecting portions 701a and 701b of the second pushing parts 70a and 70b along the second direction. In the illustrated embodiment, the third limiting portions 72a and 72b are considered as slides, fixed in the corresponding fourth assembly groove 210 or fifth assembly groove 220, allowing the first moving shafts 51a and 51b to movably pass through the third limiting portions 72a and 72b in the second direction to achieve reciprocating movement of the second moving shafts 71a and 71b in the second direction. A second stop 711a and 711b are provided on the second moving shafts 71a and 71b, located on the side of the second pushing portions 70a and 70b (connecting portions 701a and 701b) away from the third limiting portions 72a and 72b.

[0069] The number of the third limiting portions 72a and 72b corresponds one-to-one with the number of the second pushing portions 70a and 70b on the corresponding sides. They are disposed on the second assembly plate 200 along the second direction and located on the side of the corresponding second pushing portions 70a and 70b away from the second stop heads 711a and 711b. The third limiting portions 72a and 72b are used to limit the reciprocating travel of the second pushing portions 70a and 70b and serve as slide blocks for the reciprocating movement of the second moving shafts 71a and 71b. The third limiting portions 72a and 72b include second limiting blocks 721a and 721b and third elastic members 722a and 722b. The second limiting blocks 721a and 721b can be fixed in the corresponding fourth assembly groove 210 or fifth assembly groove 220. In the illustrated embodiment, each of the second limiting blocks 721a and 721b includes a main body block 7211a and 7211b disposed in the corresponding fourth assembly groove 210 or fifth assembly groove 220, and a fixing block 7212a and 7212b disposed on the side of the main body block 7211a and 7211b facing the third boss 230. The third boss 230 is provided with a limiting groove 235 for limiting the fixing blocks 7212a and 7212b at the position corresponding to the fixing blocks 7212a and 7212b (see Figure 7 The fixing blocks 7212a and 7212b extend into and are fixed in the limiting groove 235 along the first direction to limit the second limiting blocks 721a and 721b and prevent the second limiting blocks 721a and 721b from moving along the second direction.

[0070] The second limiting blocks 721a and 721b have second through holes 723a and 723b through which the second moving shafts 71a and 71b move along the second direction. The third elastic members 722a and 722b are defined as self-resetting springs. The self-resetting springs are sleeved on the second moving shafts 71a and 71b, and one end of the self-resetting springs abuts against the second limiting blocks 721a and 721b, and the other end abuts against the second pushing parts 70a and 70b. When the second moving shafts 71a and 71b move forward along the second direction, they drive the second stop heads 711a and 711b to move forward. The second stop heads 711a and 711b cause the second pushing parts 70a and 70b to move toward the second limiting blocks 721a and 721b and compress the third elastic members 722a and 722b. When the second moving shafts 71a and 71b move in the opposite direction along the second direction, the third elastic members 722a and 722b extend to cause the second pushing parts 70a and 70b to move toward the other abutting surface 322. The second pushing parts 70a and 70b drive the third moving clamping part 600 to move toward the other abutting surface 322 to clamp the workpiece.

[0071] Please see Figure 12 and Figure 13 This is a schematic diagram of one embodiment of the positioning and clamping device of the present invention. The positioning and clamping device of the present invention includes a clamping mechanism 800 and a positioning and clamping fixture disposed on the clamping mechanism 800. The clamping mechanism 800 includes a base plate 810, a clamping plate 820 disposed on the base plate 810, and a first power unit 830 and a second power unit 840 disposed on both sides of the clamping plate 820 along a second direction. The clamping plate 820 is provided with a second horizontal limiting part 821 for horizontally limiting the positioning and clamping device. The second horizontal limiting part 821 may be limited to include at least two limiting posts or limiting blocks. The positioning and clamping fixture is limited on the clamping plate 820 by the second horizontal limiting part 821. The first power unit 830 and the second power unit 840 are symmetrically disposed on both sides of the positioning and clamping fixture with the center of the positioning and clamping fixture as the symmetrical point. The first power unit 830 is connected to the input end of the first drive unit 500, for example, to one end of the two first moving shafts 51a and 51b. The second power unit 840 is connected to the input end of the second drive unit 700, for example, to one end of the two second moving shafts 71a and 71b.

[0072] The first power unit 830 and the second power unit 840 have the same or similar structure or function. In the illustrated embodiment, the first power unit 830 and the second power unit 840 are configured as manual power units. Each of them includes hinge seats 831 and 841 disposed on the base plate 810, quick clamps 832 and 842 disposed on the hinge seats 831 and 841 and capable of being flipped or reset to the opposite power unit, power shafts 833 and 843 passing through the hinge seats 831 and 841 along the second direction and hinged at one end to the quick clamps 832 and 842, and connecting members 834 and 844 connected to the other end of the power shafts 833 and 843. The connecting members 834 and 844 have second connecting portions 8341 and 8441 that are connected to the corresponding two first moving shafts 51a and 51b or two second moving shafts 71a and 71b. When the two quick clamps 832 and 842 flip in opposite directions, the quick clamps 832 and 842 of the first power unit 830 drive the corresponding connecting parts 834 and 844 to push the first moving shafts 51a and 51b in the opposite direction along the second direction, so that the first moving clamping part 410 and the second moving clamp release the workpiece; the quick clamps 832 and 842 of the second power unit 840 drive the corresponding connecting parts 834 and 844 to push the second moving shafts 71a and 71b in the forward direction along the second direction, so that the third moving clamping part 600 releases the workpiece. When the two quick clamps 832 and 842 flip in opposite directions, the quick clamps 832 and 842 of the first power unit 830 drive the corresponding connecting parts 834 and 844 to pull the first moving shafts 51a and 51b in the forward direction along the second direction, so that the first moving clamping part 410 and the second moving clamping part 420 clamp the workpiece; the quick clamps 832 and 842 of the second power unit 840 drive the corresponding connecting parts 834 and 844 to pull the second moving shafts 71a and 71b in the reverse direction along the second direction, so that the third moving clamping part 600 clamps the workpiece.

[0073] The working principle of the positioning clamping fixture and positioning clamping device according to the embodiments of the present invention is as follows:

[0074] (I) Placing the first strip workpiece A1: Place the three first strip workpieces A1 one by one on the three support mechanisms 300. The following description uses one of the first strip workpieces A1 as an example: Use the abutting surface 322 of one of the support platforms 320 of the support mechanism 300 (e.g., the left support platform 320 in the figure) as the reference surface in the second direction. Place the planar segments A104 at both ends of the first strip workpiece A1 on the support planes 321 of the two support platforms 320. At this time, the vertical segments A103 at both ends of the first strip workpiece A1 are located inside the two abutting surfaces 322, and the center line of the first strip workpiece A1 in the second direction is not aligned with the clamping center of the first moving clamping part 410 and the second moving clamping part 420.

[0075] (II) Simultaneously clamping the first clamping unit 400 and the second clamping unit to clamp the first strip workpiece A1: (1) Flipping the quick clamps 832 and 842 of the first power unit 830 away from the second power unit 840, the quick clamps 832 and 842 of the first power unit 830 drive the corresponding connecting parts 834 and 844 to pull the two first moving shafts 51a and 51b in the positive direction of the second direction, the two first moving shafts 51a and 51b cause the two first pushing parts 50a and 50b of each group to move in the positive direction of the second direction, the two first... The second inclined surfaces 501a and 501b of the pushing parts 50a and 50b press against the first inclined surfaces 411 and 421 of the first movable clamping part 410 and the second movable clamping part 420 along the first direction. As a result, the first movable clamping part 410 and the second movable clamping part 420 move towards each other along the first direction and press against the first elastic member 430, thereby achieving clamping of the workpiece. Since the two first movable clamping parts 410 are symmetrically arranged on both sides of the support mechanism 300 with the central axis along the second direction as the axis of symmetry, and... Since the two first driving units have the same structure and are driven by the first power device at the same time, the opposing movement strokes of the first moving clamping part 410 and the second moving clamping part 420 are consistent, so that the center line of each workpiece along the second direction can be kept on the same center line (coinciding with the clamping center), so that several workpieces can be aligned, ensuring the positional accuracy of the workpiece along the first direction; (2) make the quick clamps 832 and 842 of the second power unit 840 flip away from the first power unit 830, and the second power unit 840 The quick clamps 832 and 842 drive the corresponding connecting parts 834 and 844 to pull the two second moving shafts 71a and 71b in the opposite direction along the second direction. The two second moving shafts 71a and 71b cause the two second pushing parts 70a and 70b of each group to move in the opposite direction along the second direction. The two second pushing parts 70a and 70b drive the third moving clamping part 600 to move along the second direction toward the reference elevation of the left support platform 320. The two clamping blocks 610 of the third moving clamping part 600 push the first strip workpiece A1 against the reference elevation. In this way, each workpiece can be centered in the lateral direction and use the same reference elevation as a single-sided reference in the longitudinal direction, providing the same reference elevation for workpieces of different lengths, further improving the clamping position accuracy.

[0076] (iii) The second strip workpiece A2 is placed on the first strip workpiece A1 and horizontally positioned at the first horizontal positioning part.

[0077] (iv) After the workpiece welding is completed, release the workpiece and, referring to step (ii), perform a reverse reset operation to release the workpiece from the first clamping unit 400 and the second clamping unit.

[0078] The positioning and clamping fixture and positioning and clamping device of the present invention have at least the following beneficial effects: (i) It changes the traditional clamping method and proposes a double-sided simultaneous clamping method, so that the center line of each workpiece can be aligned, thereby improving the clamping position accuracy; (ii) In addition to the double-sided clamping, there is also a single-sided abutment clamping method in the vertical direction, which ensures that each workpiece has the same single-sided reference while the center line is aligned, thereby further improving the clamping position accuracy; (iii) Each fixture can assemble multiple sets of workpieces at the same time, and can realize the function of simultaneously positioning and clamping multiple sets of workpieces, thereby increasing efficiency many times over; (iv) Multiple sets of first clamping units realize clamping and releasing through multiple sets of first pushing parts connected in series on the first moving shaft, and multiple sets of second clamping units realize clamping and releasing through multiple sets of second pushing parts connected in series on the second moving shaft, thereby realizing the function of clamping or releasing multiple sets of workpieces at the same time with one drive, thereby increasing efficiency many times over; (v) Even if the absolute size difference of multiple sets of workpieces on the same fixture is caused by machining tolerance, their center lines can still be aligned (coincident) and their single-sided references can be consistent.

[0079] The above embodiments merely illustrate preferred implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention should be determined by the appended claims.

Claims

1. A positioning and clamping fixture, comprising a support mechanism for supporting a workpiece and a clamping mechanism for clamping the workpiece supported on the support mechanism, characterized in that: The clamping mechanism includes a first clamping unit capable of clamping the workpiece along a first direction and a first driving unit for driving the first clamping unit to clamp the workpiece. The first clamping unit includes a first movable clamping part and a second movable clamping part symmetrically arranged on two opposite sides of the support mechanism along the first direction. The first driving unit includes a first driving component and a second driving component for driving the first movable clamping part and the second movable clamping part to move towards each other along the first direction to clamp the workpiece. The driving stroke of the first driving component and the second driving component is the same. The support mechanism has a clearance space that runs through the support mechanism along the first direction at the positions corresponding to the first and second movable clamping parts. The clearance space divides the support mechanism into two mutually spaced support platforms. The two ends or sides of the workpiece are respectively placed on the two support platforms, and the middle section of the workpiece is suspended above the clearance space. The first movable clamping part and the second movable clamping part are respectively arranged on opposite sides of the clearance space. The first movable clamping part and the second movable clamping part are used to clamp the two opposite sides of the middle section of the workpiece.

2. The positioning and clamping fixture as described in claim 1, characterized in that: The first and second movable clamping portions are defined as symmetrically arranged first inclined surfaces on their sides that are far apart from each other along a first direction. The two first inclined surfaces are inclined along a second direction that is perpendicular to the first direction and in opposite or opposite directions. The first and second driving components each include a first pushing portion and a first driving portion for driving the first pushing portion to reciprocate along the first direction. The two first pushing portions are defined as symmetrically arranged second inclined surfaces that slide in cooperation with the first inclined surfaces on their sides that are close to each other along the first direction. When the two first pushing portions move forward along the second direction, the two second inclined surfaces press against the first inclined surface to drive the first and second movable clamping portions to move towards each other. When the two first pushing portions move in opposite directions along the second direction, the two first pushing portions release the pressing force on the first inclined surface so that the first and second movable clamping portions can move in opposite directions. A first elastic member is provided between the first movable clamping part and the second movable clamping part. When the two second inclined surfaces press against the first inclined surface, the first movable clamping part and the second movable clamping part move towards each other and compress the first elastic member. When the two first pushing parts release the pressure on the first inclined surface, the first elastic member extends to reset the first movable clamping part and the second movable clamping part to move in opposite directions.

3. The positioning and clamping fixture as described in claim 2, characterized in that: The first driving unit includes a first moving shaft capable of reciprocating along the second direction, and the first moving shaft is connected to the first pushing unit; when the first moving shaft moves forward along the second direction, the first moving shaft drives the first pushing unit connected to it to move forward to clamp the workpiece; when the first moving shaft moves backward along the second direction, the first moving shaft drives the first pushing unit to move backward to release the workpiece. The first driving unit further includes a first limiting part spaced apart from the first pushing unit along the second direction. The first limiting part is used to limit the reciprocating travel of the first pushing unit. The first limiting part includes a first limiting block and a second elastic member. The first limiting block has a first through hole through which the first moving shaft moves along the second direction. One end of the second elastic member abuts against the first limiting block and the other end abuts against the first pushing unit. When the first moving shaft moves forward along the second direction, it drives the first pushing unit to move away from the first limiting block to push the first moving clamping part and the second moving clamping part to move towards each other. The second elastic member extends after losing force. When the first moving shaft moves backward along the second direction, it drives the first pushing part to move closer to the first limiting block and compress the second elastic member. After the second elastic member is compressed, it restricts the first pushing part from continuing to move to prevent its second inclined surface from disengaging from the first inclined surface of the corresponding moving clamping part.

4. The positioning and clamping fixture as described in claim 2, characterized in that: The supporting mechanism, the first driving component, and the second driving component are all mounted on a first mounting plate. The first mounting plate has a first mounting groove distributed along the second direction, and the supporting mechanism is mounted in the first mounting groove along the second direction. The first mounting plate also has a second mounting groove and a third mounting groove disposed on both sides of the first mounting groove along the first direction. A first boss is formed between the second mounting groove and the first mounting groove, and a second boss is formed between the third mounting groove and the first mounting groove. The first movable clamping part and the second movable clamping part are respectively placed on the first boss and the second boss and can move along the first direction. The first driving component and the second driving component are respectively disposed in the second mounting groove and the third mounting groove. Both of the first driving parts are connected to the output shaft of a first power unit; the first mounting plate has a through groove at the position corresponding to the two first pushing parts, which passes through the first boss and the second boss in a first direction, and a first connecting part for connecting the two first pushing parts is movably disposed in the through groove.

5. The positioning and clamping fixture as described in claim 1, characterized in that: Both support platforms have support portions for placing the two ends or sides of the workpiece thereon. Both support portions have a support plane and a supporting surface. The distance between the two supporting surfaces is greater than the dimension of the workpiece in the corresponding direction. The clamping mechanism further includes a second clamping unit capable of clamping the workpiece along a second direction and a second driving unit for driving the second clamping unit to clamp the workpiece. The second clamping unit is defined as a third movable clamping portion movably disposed at one of the support platforms. The second driving unit is used to drive the third movable clamping portion to move along the second direction toward the supporting surface of the other support platform to cooperate with it in clamping the workpiece.

6. The positioning and clamping fixture as described in claim 5, characterized in that: The direction in which the workpiece extends along the second direction is defined as the length direction of the workpiece, and the direction in which it extends along the first direction is defined as the width direction of the workpiece. The two ends of the workpiece along the length direction are respectively supported on the two support platforms. The workpiece has a wide surface segment, two narrow surface segments extending outward from the two ends of the wide surface segment, a vertical surface segment extending vertically upward from each narrow surface segment, and a planar segment extending horizontally outward from each vertical surface segment. The support planes of the two support parts are respectively used to support the two planar segments, and the inner vertical surfaces of the two support planes form the abutting vertical surfaces. The distance between the two abutting vertical surfaces is greater than the distance between the two vertical surface segments. Both of the support platforms also have a second limiting part formed inside the support portion for limiting the workpiece along the width direction of the workpiece; a gap space is formed between the second limiting part of one of the support platforms and the abutting surface of the support platform, and the third movable clamping part is movably disposed in the gap space along the second direction. Two L-shaped notches are formed between the end face of the wide section and the side face of each of the narrow sections; the third movable clamping part includes two clamping blocks that conform to the two L-shaped notches and a connecting block connected between the two clamping blocks, the connecting block being located below the workpiece; the second driving unit includes a third driving assembly and a fourth driving assembly disposed on both sides of the support mechanism along the first direction, the third driving assembly and the fourth driving assembly each including a second pushing part and a second driving part, the two second pushing parts being respectively connected to both sides of the third movable clamping part along the first direction, the two second driving parts being used to simultaneously drive the two second pushing parts to reciprocate along the second direction; when the two second pushing parts move forward along the second direction, they cause the third movable clamping part to release the workpiece, when the two second driving parts move in the opposite direction along the second direction, they cause the third movable clamping part to move towards the other abutting surface to cooperate with it to clamp the workpiece.

7. The positioning and clamping fixture as described in claim 6, characterized in that: The second drive unit includes a second moving shaft capable of reciprocating along a second direction, and the second moving shaft is connected to the second push unit; when the second moving shaft moves forward along the second direction, the second moving shaft drives the second push unit connected to it to move forward to release the workpiece; when the second moving shaft moves backward along the second direction, the second moving shaft drives the second push unit to move backward to clamp the workpiece. The second driving part further includes a third limiting part spaced apart from the second pushing part along the second direction. The third limiting part is used to limit the reciprocating stroke of the second pushing part. The third limiting part includes a second limiting block and a third elastic member. The second limiting block has a second through hole through which the second moving shaft moves along the second direction. One end of the third elastic member abuts against the second limiting block and the other end abuts against the second pushing part. When the second moving shaft moves forward along the second direction, it drives the second pushing part to move towards the second limiting block and compresses the third elastic member. When the second moving shaft moves backward along the second direction, the third elastic member extends to move the second pushing part towards another supporting surface. The second pushing part drives the third moving clamping part to move towards another supporting surface to clamp the workpiece.

8. The positioning and clamping fixture as described in claim 7, characterized in that: The third drive assembly and the fourth drive assembly are assembled on a second assembly plate. The second assembly plate has a fourth assembly slot and a fifth assembly slot disposed on both sides of the support mechanism along the first direction. The fourth assembly slot and the fifth assembly slot are distributed on the second assembly plate along the second direction. The second drive parts of the third drive assembly and the fourth drive assembly are respectively disposed in the fourth assembly slot and the fifth assembly slot. A third protrusion is formed between the fourth assembly slot and the fifth assembly slot. A vertically penetrating first assembly cavity is formed on the third protrusion at the position corresponding to the two support platforms. The two support platforms are respectively inserted into the two first assembly cavities along the vertical direction. A vertically penetrating second assembly cavity is formed on the second assembly plate at the position corresponding to the first moving clamping part and the second moving clamping part. The second assembly cavity is connected to the clearance space, the fourth assembly slot and the fifth assembly slot along the first direction. Two third assembly cavities are formed on the third protrusion at the position corresponding to the two second pushing parts. The opposite ends of the two third assembly cavities along the first direction are connected to a corresponding first assembly cavity, and the ends that are far apart from each other are connected to the fourth assembly slot and the fifth assembly slot, respectively. The workpiece is defined as a first strip workpiece, and the clamping mechanism is used to clamp the first strip workpiece along a first direction and a second direction. The upper surfaces of both ends of the first strip workpiece are welded to the lower surfaces of a second strip workpiece. The second strip workpiece has an overhanging portion that extends beyond the first strip workpiece along the first direction and / or the second direction. A first horizontal limiting portion for restricting the horizontal movement of the second strip workpiece is provided on the second assembly plate at a position corresponding to the overhanging portion.

9. The positioning and clamping fixture as described in any one of claims 5 to 8, characterized in that: The workpiece is defined as multiple groups, and the support mechanism, the first clamping unit and the second clamping unit are each defined as a number greater than or equal to the number of workpiece groups. The first driving unit is used to drive the corresponding first clamping unit to simultaneously clamp or release the corresponding workpiece along the first direction; the second driving unit is used to drive several groups of second clamping units to clamp or release the corresponding workpiece along the second direction.

10. A positioning and clamping device, characterized in that: The device includes a clamping mechanism and a positioning clamping fixture as described in any one of claims 1 to 9 disposed on the clamping mechanism; the clamping mechanism is provided with a first power unit for connecting to the input end of a first drive unit of the positioning clamping fixture; the clamping mechanism is further provided with a second power unit for connecting to the input end of a second drive unit of the positioning clamping fixture.

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