CN206393070U

CN206393070U - A kind of fixture for laser welding

Info

Publication number: CN206393070U
Application number: CN201720015641.3U
Authority: CN
Inventors: 王逸麟; 蒋平; 曹龙超; 高忠梅
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2017-01-06
Filing date: 2017-01-06
Publication date: 2017-08-11
Anticipated expiration: 2027-01-06

Abstract

A kind of fixture for laser welding, belongs to weld jig, and the existing weld jig adaptability of solution is poor, clamps insecure problem.The utility model includes substrate, connecting rod, briquetting, ratchet, cam, handle and ratchet；Connecting rod can be around substrate rotating, and connecting rod one end is briquetting, and one end is connected by key and ratchet, and cam is placed on ratchet by its eccentric orfice, can be around pawl wheel；Ratchet is provided with the handle hole being connected with cam, ratchet upper end is connected with swing arm, ratchet lower end is by spring compression on ratchet, and to ensure handle, ratchet, cam set is fit around ratchet one-way motion.The utility model requirement on machining accuracy is low, low manufacture cost, workpiece is clamped using ratchet and pawl arrangement, it is reliable and stable, prior alignment jig is not needed, it will not be released because of workpiece deformation in process or workbench vibrations, convenient mounting and clamping, dismounting is flexible, suitable for the fast and reliable clamping of different-thickness plate, demand of the laser welding to fixture efficient stable disclosure satisfy that.

Description

A kind of fixture for laser welding

Technical field

The utility model belongs to weld jig, and in particular to a kind of fixture for laser welding, it is adaptable to which magnetic field assistant laser is welded Connect experiment porch.

Background technology

Laser welding is a kind of advanced welding procedure, is more and more applied in the industry, and externally-applied magnetic field is to swashing Photocoagulation quality has some improvement, and also turns into the focus of research., it is necessary to frequently regulation in laser welding experiment The parameters such as laser power, speed of welding, are welded with the workpiece to different-thickness；Meanwhile, in welding process, the heat of workpiece Deformation is larger, is easily caused fixture and releases or workpiece warpage, the problems such as welding seam misalignment.For above-mentioned operating mode, it is desirable to which fixture can be fitted The workpiece of different-thickness is answered, quick frequently dismounting, and reliable clamping is realized, the reaction produced by workpiece warpage can be resisted Power, suppresses the deformation of workpiece, meanwhile, the presence of auxiliary magnetic field requires that fixture can not disturb the distribution in magnetic field.

Weld jig on the market utilizes the dead point of multi-bar linkage mostly at present, by rotating handle to dead-centre position come real Now to the fixation of welded plates, but the structure dead-centre position of this mechanism is fixed, when welding different-thickness workpiece, it is necessary to adjust Section fixture contacts the clamping side pole length of bar with workpiece to adapt to the welding plate of different-thickness, cumbersome, it is impossible to meet fast and convenient Change the requirement of workpiece.And in welding process, exist because welding plate thermal deformation causes fixture rod member to rotate, turn over dead-centre position and Release, the risk of fixture failure.The use requirement of magnetic field assistant laser welding can not be met.

The easy assembling and disassembling device of different-thickness workpiece is adapted to for magnetic field assistant laser welding.

The content of the invention

The utility model proposes a kind of fixture for laser welding, the existing weld jig adaptability of solution is poor, and it is unreliable to clamp The problem of, it is adaptable to the fast and reliable clamping of different-thickness plate.

A kind of fixture for laser welding that the utility model is proposed, including substrate, connecting rod, briquetting, ratchet, cam, handle And ratchet；It is characterized in that：

The connecting rod is fixed on substrate centrally through revolute pair, and one end of connecting rod, which passes through rivet and rotated with briquetting, to be connected Connect, the other end of connecting rod is fixedly connected by key with ratchet, due to the limitation of key, with connecting rod relative motion can not occur for ratchet；

The cam has eccentric orfice, and the handle hole with radial communication eccentric orfice；The cam passes through its eccentric orfice It is placed on ratchet, cam can be around pawl wheel by axle of ratchet；

The handle is hollow cylinder, and its lower end has shoulder hole, and the outer surface of lower end has external screw thread, along handle upper end Mask is related to two sections of curved indentations of Central Symmetry distribution；

The ratchet is rod-like element, and its lower end is annular boss, and annular boss both sides are scabbled, so as to spine that can be with ratchet Odontoid is engaged；

Spring is cased with the ratchet, the upper end of ratchet is penetrated upwards by the lower port of handle, ratchet upper end is consolidated with swing arm Even；Spring upper end is contacted with the shoulder hole step surface of handle, and lower spring end is contacted with the annular boss step surface of ratchet, in pressure Contracting state；

The lower end of the handle is threadedly coupled with the handle hole of cam, and handle is fixed on cam, loaded in handle Ratchet can move up and down along handle axis, spring compression ratchet, it is engaged with ratchet, limit cam only in the counterclockwise direction Rotate；Acted on by spring, swing arm is pressed on the curved indentations of handle simultaneously.

Described fixture for laser welding, it is further characterized by：

The annular boss side of the ratchet is provided with spacer pin, and its lower end is convex during preventing that ratchet is lifted up by swing arm Platform is along ratchet axial-rotation；

Every section of curved indentations in the handle upper end face are constituted by two sections interconnected, and wherein first paragraph is spiral Inclined-plane, second segment is the plane vertical with handle axis, to enable swing arm temporarily to fix, so as to facilitate workpiece to dismantle.

In actual use, workpiece is placed under briquetting, by oliquely downward rotating handle counterclockwise, band moving cam is surrounded Ratchet is rotated counterclockwise, and in the presence of cam and substrate, connecting rod left end is lifted, and right-hand member constantly declines, and briquetting clamps workpiece, Due to the effect of ratchet, eccentric cam will not opposite direction rotate, therefore workpiece can only be compressed constantly, will not be released；In welding After end, only swing arm, band of the ratchet in swing arm need to be rotated along the spiral inclined-plane upward direction of handle upper end face curved indentations Dynamic lower motion upwards, ratchet lower end is no longer contacted with ratchet, and cam is free to rotate, and being rotated further handle, it is transferred to curved surface recessed The second segment plane of groove, swing arm can be fixed temporarily, can keep the vacant state of ratchet, can make pressure toward back rotation handle clockwise The upward lifting of block, removes workpiece.

Under normal station ratchet by spring compression on ratchet, it is quick in order to realize for preventing cam from rotating backward Dismantle workpiece, swing arm lifted directly up, can fast speed belt pawl depart from ratchet, cam can freely rotate around ratchet, clockwise Workpiece can be removed toward back rotation handle, so as to realize quick releasing function.

The utility model requirement on machining accuracy is low, low manufacture cost, and workpiece is clamped using ratchet and pawl arrangement, reliable steady It is fixed, it is not necessary to prior alignment jig, it will not be released because of workpiece deformation in process or workbench vibrations, convenient mounting and clamping is torn open Unload flexibly, it is adaptable to the fast and reliable clamping of different-thickness plate, disclosure satisfy that demand of the laser welding to fixture efficient stable.

Brief description of the drawings

Fig. 1 is general structure schematic diagram of the present utility model；

Fig. 2 is sectional view of the present utility model；

Fig. 3 (A) is ratchet portions partial sectional view；

Fig. 3 (B) is Fig. 3 (A) left view；

Fig. 3 (C) is Fig. 3 (A) and Fig. 3 (B) A-A sectional views；

Fig. 4 (A) is the schematic perspective view of handle；

Fig. 4 (B) is the top view of handle；

Fig. 4 (C) is Fig. 4 (B) B-B sectional views.

Embodiment

The utility model is further illustrated below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, the utility model includes substrate 1, connecting rod 4, briquetting 2, ratchet 9, cam 6, handle 8 and ratchet 12；

The connecting rod 4 centrally through revolute pair fix on substrate 1, one end of connecting rod 4 passes through 2 turns of rivet 3 and briquetting Dynamic connection, the other end of connecting rod 4 is fixedly connected by key 5 with ratchet 9, due to the limitation of key 5, and ratchet 9 can not occur with connecting rod 4 Relative motion；

As shown in Fig. 3 (A), Fig. 3 (B), the cam 6 has eccentric orfice 6A, and the hand with radial communication eccentric orfice 6A Delthyrium 6B；

The cam 6 is placed on ratchet 9 by its eccentric orfice 6A, and cam 6 is that axle can be around pawl wheel with ratchet 9；

As shown in Fig. 4 (A), Fig. 4 (B), Fig. 4 (C), the handle 8 is hollow cylinder, and its lower end has shoulder hole 8A, under The outer surface at end has external screw thread 8B, has two sections of curved indentations 8C being distributed on Central Symmetry along the upper surface of handle 8；

As shown in Fig. 3 (A), Fig. 3 (B), the ratchet 12 is rod-like element, and its lower end is annular boss 12A, annular boss 12A both sides are scabbled, to be engaged with the ratchet shape of ratchet 9；

Spring 11 is cased with the ratchet 12, the upper end of ratchet 12 is penetrated upwards by the lower port of handle 8, the upper end of ratchet 12 It is connected with swing arm 7；The upper end of spring 11 is contacted with the shoulder hole 8A step surfaces of handle 8, the lower end of spring 11 and the convex annular of ratchet 12 Platform 12A step surfaces are contacted, in compressive state；

The lower end of the handle 8 is threadedly coupled with the handle hole 6B of cam 6, handle 8 is fixed on cam 6, loaded on hand Ratchet 12 in handle 8, can move up and down along handle axis, and spring 11 compresses ratchet 12, it is engaged with ratchet 9, limit cam 6 Rotate only in the counterclockwise direction；By the effect of spring 11, swing arm 7 is pressed on the curved indentations 8C of handle 8 simultaneously.

As shown in Fig. 3 (C), the annular boss 12A sides of the ratchet 12 can be provided with spacer pin 10, to prevent ratchet 12 its lower end boss 12A when being lifted up by swing arm 7 are along the axial-rotation of ratchet 12；

As shown in Fig. 4 (A), every section of curved indentations 8C of the upper surface of handle 8 is constituted by two sections interconnected, wherein First paragraph is spiral inclined-plane, and second segment is the plane vertical with handle axis, to enable swing arm 7 temporarily to fix, from And facilitate workpiece to dismantle.

Claims

1. a kind of fixture for laser welding, including substrate (1), connecting rod (4), briquetting (2), ratchet (9), cam (6), handle (8) and Ratchet (12)；It is characterized in that：

The connecting rod (4) is fixed on substrate (1) centrally through revolute pair, and one end of connecting rod (4) passes through rivet (3) and briquetting (2) connection is rotated, the other end of connecting rod (4) is fixedly connected by key (5) with ratchet (9), due to the limitation of key (5), ratchet (9) Can not occur relative motion with connecting rod (4)；

The cam (6) has eccentric orfice (6A), and the handle hole (6B) with radial communication eccentric orfice (6A)；The cam (6) it is placed on by its eccentric orfice (6A) on ratchet (9), cam (6) is that axle can be around pawl wheel with ratchet (9)；

The handle (8) is hollow cylinder, and its lower end has shoulder hole (8A), and the outer surface of lower end has external screw thread (8B), edge Handle (8) upper surface has two sections of curved indentations (8C) being distributed on Central Symmetry；

The ratchet (12) is rod-like element, and its lower end is annular boss (12A), and annular boss (12A) both sides are scabbled, so as to energy It is engaged with the ratchet shape of ratchet (9)；

Spring (11) is cased with the ratchet (12), the upper end of ratchet (12) is penetrated upwards by the lower port of handle (8), ratchet (12) upper end is connected with swing arm (7)；Spring (11) upper end is contacted with shoulder hole (8A) step surface of handle (8), under spring (11) End is contacted with annular boss (12A) step surface of ratchet (12), in compressive state；

The lower end of the handle (8) is threadedly coupled with the handle hole (6B) of cam (6), and handle (8) is fixed on cam (6), It can be moved up and down loaded on the ratchet (12) in handle (8) along handle axis, spring (11) compresses ratchet (12), makes itself and ratchet (9) engage, limit cam (6) and rotate only in the counterclockwise direction；By the effect of spring (11), swing arm (7) is pressed in simultaneously On the curved indentations (8C) of handle (8).

2. fixture for laser welding as claimed in claim 1, it is characterised in that：

The annular boss (12A) of the ratchet (12) sideways be provided with spacer pin (10), to prevent ratchet (12) by swing arm (7) to Its lower end boss (12A) is along ratchet (12) axial-rotation during upper lifting；

Every section of curved indentations (8C) of handle (8) upper surface are constituted by two sections interconnected, and wherein first paragraph is spiral Rising ramp, second segment is the plane vertical with handle axis, to make swing arm (7) temporarily to fix, so as to facilitate workpiece Dismounting.