WO2021119958A1 - 一种用于焊接工件的定位治具 - Google Patents

一种用于焊接工件的定位治具 Download PDF

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Publication number
WO2021119958A1
WO2021119958A1 PCT/CN2019/125772 CN2019125772W WO2021119958A1 WO 2021119958 A1 WO2021119958 A1 WO 2021119958A1 CN 2019125772 W CN2019125772 W CN 2019125772W WO 2021119958 A1 WO2021119958 A1 WO 2021119958A1
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Prior art keywords
positioning
fixedly connected
fixed base
pressing
welding workpieces
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PCT/CN2019/125772
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English (en)
French (fr)
Inventor
龚激
曹海斌
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Suzhou Thinkrisen & Beal Solutions Precision Machinery Co Ltd
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Suzhou Thinkrisen & Beal Solutions Precision Machinery Co Ltd
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Priority to PCT/CN2019/125772 priority Critical patent/WO2021119958A1/zh
Priority to CN201980003134.XA priority patent/CN111183000A/zh
Publication of WO2021119958A1 publication Critical patent/WO2021119958A1/zh
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
    • B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • B23K37/0435—Clamps
    • B23K37/0443—Jigs

Definitions

  • the invention relates to the technical field of jigs. More specifically, the present invention relates to a positioning jig for welding workpieces.
  • the purpose of the present invention is to provide a positioning jig for welding workpieces, which has a simple structure, is convenient for assembly, replacement and maintenance of parts, and is easy to operate. Positioning and fixing, pressing and fixing by pressing components, high degree of automation, greatly improving work efficiency, reducing production costs, and can clamp multiple workpieces at the same time, further improving work efficiency, and has a broad market application value .
  • a positioning jig for welding workpieces which includes: a fixed base; and a positioning component and a pressing component provided at the top of the fixed base;
  • the positioning assembly includes: a movable first positioning device arranged at one end of the fixed base; at least one set of second positioning devices fixedly connected to the middle of the fixed base; and another set of the fixed base At least one set of third positioning devices at one end;
  • the pressing assembly includes: a rotary pressing device arranged at one end of the fixed base; a first pressing device arranged in the middle of the fixed base; and a second pressing device arranged beside the rotating pressing device Device.
  • the first positioning device includes: a first driving cylinder;
  • a bearing plate fixedly connected to the power output end of the first driving cylinder
  • At least one positioning member fixedly connected to the top end of the carrying board
  • At least two positioning parts protrude upward from the top end of the positioning member.
  • a limit device is provided on the left and right sides of the carrying plate.
  • the second positioning device includes: a fixing seat
  • a first fixing member fixedly connected to the top end of the fixing seat
  • a first positioning pin fixedly connected to the surface of the first fixing member.
  • the third positioning device includes: a second driving cylinder, which is fixedly connected to the bottom end of the fixed base through a cylinder fixing seat;
  • a connecting plate fixedly connected to the power output end of the second driving cylinder
  • Second fixing members respectively fixedly connected to both ends of the connecting plate
  • a second positioning pin fixedly connected to the top end of the second fixing member
  • the third positioning device is arranged obliquely along the horizontal direction.
  • the rotary pressing device includes: a jacking rotary cylinder;
  • At least one adapter block fixedly connected to the power output end of the jacking rotary cylinder;
  • a first pressure head fixedly connected to the bottom end of the adapter block.
  • the first pressing device includes: a first driving device, which is fixedly connected to a side end of the fixed base through a first fixing seat;
  • a first rotating member fixedly connected to the power output end of the first driving device
  • Second indenters respectively fixedly connected to the two ends of the fixed beam
  • the second pressing device includes: a second driving device
  • a second rotating member fixedly connected to the power output end of the second driving device
  • An intermediate connecting piece fixedly connected to one end of the second rotating piece
  • a third positioning pin and a third indenter fixedly connected to one end of the intermediate connector.
  • the two adjacent second positioning devices and the two third positioning devices are mirrored.
  • the present invention includes at least the following beneficial effects: the present invention provides a positioning jig for welding workpieces, which has a simple structure, facilitates the assembly, replacement and maintenance of parts and components, and is easy to operate.
  • the tightening components are compressed and fixed, and the degree of automation is high, which greatly improves work efficiency and reduces production costs.
  • multiple workpieces can be clamped, which further improves work efficiency and has broad market application value.
  • Figure 1 is a schematic structural diagram of a positioning jig in an embodiment of the present invention.
  • Figure 2 is a top view of a positioning jig in an embodiment of the present invention.
  • Figure 3 is a schematic structural diagram of a positioning component in an embodiment of the present invention.
  • Fig. 4 is a schematic diagram of the structure of the pressing assembly in an embodiment of the present invention.
  • connection corresponds to the size from top to bottom
  • width corresponds to the size from left to right
  • depth corresponds to the size from front to back.
  • the present invention provides a positioning jig for welding workpieces, which includes: a fixed base 11; and a positioning component 12 and a pressure set on the top of the fixed base 11 Tight component 13;
  • the positioning assembly 12 includes: a movable first positioning device 121 arranged at one end of the fixed base 11; at least one set of second positioning devices 122 fixed to the middle of the fixed base 11; and At least one set of third positioning devices 123 on the other end of the fixed base 11;
  • the pressing assembly 13 includes: a rotary pressing device 131 arranged at one end of the fixed base 11; a first pressing device 132 arranged at the middle of the fixed base 11; and a side of the rotating pressing device 131 The second pressing device 133 on the side.
  • the first positioning device 121 includes: a first driving cylinder 1211;
  • a bearing plate 1212 fixedly connected to the power output end of the first driving cylinder 1211;
  • At least one positioning member 1213 fixed to the top end of the carrying plate 1212;
  • At least two positioning portions 1213a protrude upward from the top end of the positioning member 1213.
  • the positioning members 1213 are different from each other to adapt to clamping different workpieces, and have versatility.
  • the positioning member is fixed to the top end of the fixed base 11.
  • a limiting device 1214 is provided on the left and right sides of the carrying plate 1212.
  • the limiting device 1214 on the left side of the carrying plate 1212 is fixedly connected to the bottom end of the fixed base 11, and the limiting device 1214 on the right side of the carrying plate 1212 is fixedly connected to the Fix the top of the base 11
  • the first positioning device 121 locates and fixes the front end of the workpiece through a positioning portion 1213a located at the top of the positioning member 1213, and the first driving cylinder 1211 drives the positioning member 1213 to reciprocate left and right in the horizontal direction to facilitate passage Different positioning parts 1213 clamp and fix different workpieces, while the positioning device 1214 performs position limitation to prevent the first driving cylinder 1211 from exceeding the stroke.
  • the second positioning device 122 includes: a fixing base 1221; a first fixing member 1222 fixed to the top of the fixing base 1221; and a first positioning pin 1223 fixed to the surface of the first fixing member 1222.
  • the second positioning device 122 uses the first positioning pin 1223 to position and fix the middle of the workpiece.
  • the third positioning device 123 includes: a second driving cylinder 1231; which is fixedly connected to the bottom end of the fixed base 11 through a cylinder fixing seat 1235;
  • a connecting plate 1232 fixedly connected to the power output end of the second driving cylinder 1231;
  • the second fixing members 1233 respectively fixedly connected to the two ends of the connecting plate 1232;
  • a second positioning pin 1234 fixed to the top end of the second fixing member 1233;
  • the third positioning device 123 is arranged obliquely along the horizontal direction.
  • the second driving cylinder 1231 drives the connecting plate 1232 to be lifted upward, and at the same time drives the second positioning pin 1234 to be lifted upward, and the second positioning pin 1234 locates and fixes the rear end of the workpiece.
  • the rotary pressing device 131 includes: a jacking rotary cylinder 1311; at least one adapter block 1312 fixedly connected to the power output end of the jacking rotary cylinder 1311; and fixedly connected to the adapter block The first indenter 1313 at the bottom of 1312.
  • the jacking and rotating cylinder 131 drives the first indenter 133 to reciprocate up and down in the vertical direction, so that the first indenter 1313 can press and fix the front end of the workpiece and prevent the workpiece from moving during processing.
  • the first pressing device 132 includes: a first driving device 1321, which is fixedly connected to the side end of the fixed base 11 through a first fixing seat 1326;
  • a first rotating member 1322 fixedly connected to the power output end of the first driving device 1321;
  • Second indenters 1324 fixed to the two ends of the fixed beam 1323 respectively;
  • the first driving device 1321 can drive the second indenter 1324 to rotate in a vertical direction, so that the second indenter 1324 can cooperate with the support base 1325 to compress and fix or loosen the workpiece. operating.
  • the second pressing device 133 includes: a second driving device 1331;
  • a second rotating member 1332 fixedly connected to the power output end of the second driving device 1331;
  • An intermediate connecting piece 1333 fixedly connected to one end of the second rotating piece 1332;
  • the third positioning pin 1334 and the third pressing head 1335 fixedly connected to one end of the intermediate connecting piece 1333.
  • the second driving device 1331 is fixed to the top end of the fixed base 11 through a second fixing base 1336.
  • the second driving device 1331 drives the third positioning pin 1334 and the third indenter 1335 to rotate in the vertical direction, the third positioning pin 1334 can position and fix the workpiece, and the third indenter 1335 can The workpiece is compressed and fixed to facilitate subsequent processing of the workpiece.
  • the two adjacent second positioning devices 122 and the two third positioning devices 123 are mirrored.
  • the present invention provides a positioning jig for welding workpieces, which has a simple structure, is convenient for assembly, replacement and maintenance of parts and components, and is easy to operate.
  • the positioning and fixing are performed by the positioning assembly, and the clamping assembly is used for positioning and fixing. It is compacted and fixed and has a high degree of automation, which greatly improves work efficiency and reduces production costs. At the same time, multiple workpieces can be clamped, which further improves work efficiency and has broad market application value.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)

Abstract

一种用于焊接工件的定位治具，包括：固定底座（11）；以及设于所述固定底座（11）顶端的定位组件（12）及压紧组件（13）；其中，所述定位组件（12）包括：设于所述固定底座（11）一端的可活动的第一定位装置（121）；固接于所述固定底座（11）中部的至少一组的第二定位装置（122）；以及设于所述固定底座（11）另一端的至少一组的第三定位装置（123）；所述压紧组件（13）包括：设于所述固定底座（11）一端的旋转压紧装置（131）；设于所述固定底座（11）中部的第一压紧装置（132）；以及设于所述旋转压紧装置（131）旁侧的第二压紧装置（133）。通过定位组件（12）进行定位固定，通过压紧组件（13）进行压紧固定，自动化程度高，大大提高了工作效率，降低了生产成本，且同时可对多个工件进行装夹，进一步提高了工作效率。

Description

一种用于焊接工件的定位治具 技术领域
本发明涉及治具技术领域。更具体地说，本发明涉及一种用于焊接工件的定位治具。
背景技术
现存的治具的固定方式大都产用螺钉进行固定，在加工不同产品需配备各自适用的治具，每进行不同产品的加工时就需更换一次治具，这就浪费了大量的人力和时间去更换治具，而且根据不同的治具在固定板上需要开设相应的螺纹孔，使得工序更加繁琐，降低了自动化程度，同时现有的治具单次只能装夹单个工件，效率低下。有鉴于此，实有必要开发一种用于焊接工件的定位治具解决上述问题。
发明内容
针对现有技术中存在的不足之处，本发明的目的是提供一种用于焊接工件的定位治具，其结构简单，便于零部件的组装、更换及维修，且易于操作，通过定位组件进行定位固定，通过压紧组件进行压紧固定，自动化程度高，大大提高了工作效率，降低了生产成本，且同时可对多个工件进行装夹，进一步提高了工作效率，具有广阔的市场应用价值。
为了实现根据本发明的这些目的和其它优点，提供了一种用于焊接工件的定位治具，包括：固定底座；以及设于所述固定底座顶端的定位组件及压紧组件；
其中，所述定位组件包括：设于所述固定底座一端的可活动的第一定位装置；固接于所述固定底座中部的至少一组的第二定位装置；以及设于所述固定底座另一端的至少一组的第三定位装置；
所述压紧组件包括：设于所述固定底座一端的旋转压紧装置；设于所述 固定底座中部的第一压紧装置；以及设于所述旋转压紧装置旁侧的第二压紧装置。
优选的是，所述第一定位装置包括：第一驱动气缸；
与所述第一驱动气缸的动力输出端相固接的承载板；以及
固接于所述承载板顶端至少一个的定位件；
其中，所述定位件的顶端向上凸起延伸有至少2个的定位部。
优选的是，所述承载板的左右两侧均设有限位装置。
优选的是，所述第二定位装置包括：固定座；
固接于所述固定座顶端的第一固定件；以及
固接于所述第一固定件表面的第一定位销。
优选的是，所述第三定位装置包括：第二驱动气缸；其通过气缸固定座固接于所述固定底座的底端；
与所述第二驱动气缸的动力输出端相固接的连接板；
分别固接于所述连接板两端的第二固定件；以及
固接于所述第二固定件顶端的第二定位销；
其中，所述第三定位装置延水平方向倾斜设置。
优选的是，所述旋转压紧装置包括：顶升旋转气缸；
与所述顶升旋转气缸的动力输出端相固接的至少一个的转接块；以及
固接于所述转接块底端的第一压头。
优选的是，所述第一压紧装置包括：第一驱动装置，其通过第一固定座固接于所述固定底座的侧端；
与所述第一驱动装置的动力输出端相固接的第一转动件；
与所述第一转动件相固接的固定横梁；
分别固接于所述固定横梁两端的第二压头；以及
与所述第二压头相匹配的支撑座。
优选的是，所述第二压紧装置包括：第二驱动装置；
与所述第二驱动装置的动力输出端相固接的第二转动件；
与所述第二转动件一端相固接的中间连接件；以及
固接于所述中间连接件一端的第三定位销及第三压头。
优选的是，相邻的两所述第二定位装置及两所述第三定位装置均镜像设置。
本发明至少包括以下有益效果：本发明提供了一种用于焊接工件的定位治具，其结构简单，便于零部件的组装、更换及维修，且易于操作，通过定位组件进行定位固定，通过压紧组件进行压紧固定，自动化程度高，大大提高了工作效率，降低了生产成本，且同时可对多个工件进行装夹，进一步提高了工作效率，具有广阔的市场应用价值。
本发明的其它优点、目标和特征将部分通过下面的说明体现，部分还将通过对本发明的研究和实践而为本领域的技术人员所理解。
附图说明
图1为本发明的一个实施例中定位治具的结构示意图；
图2为本发明的一个实施例中定位治具的俯视图；
图3为本发明的一个实施例中定位组件的结构示意图；
图4为本发明的一个实施例中压紧组件的结构示意图。
具体实施方式
下面结合附图对本发明做进一步的详细说明，本发明的前述和其它目的、特征、方面和优点将变得更加明显，以令本领域技术人员参照说明书文字能够据以实施。在附图中，为清晰起见，可对形状和尺寸进行放大，并将在所有图中使用相同的附图标记来指示相同或相似的部件。在下列描述中，诸如中心、厚度、高度、长度、前部、背部、后部、左边、右边、顶部、底部、上部、下部等用词为基于附图所示的方位或位置关系。特别地，“高度”相当于从顶部到底部的尺寸，“宽度”相当于从左边到右边的尺寸，“深度”相当于从前到后的尺寸。这些相对术语是为了说明方便起见并且通常并不旨在需要具体取向。涉及附接、联接等的术语(例如，“连接”和“附接”)是指这些结构通过中间结构彼此直接或间接固定或附接的关系、以及可动或刚性附接的关系，除非以其他方式明确地说明。
作为本发明一实施例，参考图1～4，本发明提供了一种用于焊接工件的定位治具，其包括：固定底座11；以及设于所述固定底座11顶端的定位组件12及压紧组件13；
其中，所述定位组件12包括：设于所述固定底座11一端的可活动的第一定位装置121；固接于所述固定底座11中部的至少一组的第二定位装置122；以及设于所述固定底座11另一端的至少一组的第三定位装置123；
所述压紧组件13包括：设于所述固定底座11一端的旋转压紧装置131；设于所述固定底座11中部的第一压紧装置132；以及设于所述旋转压紧装置131旁侧的第二压紧装置133。
进一步，所述第一定位装置121包括：第一驱动气缸1211；
与所述第一驱动气缸1211的动力输出端相固接的承载板1212；以及
固接于所述承载板1212顶端至少一个的定位件1213；
其中，所述定位件1213的顶端向上凸起延伸有至少2个的定位部1213a。
在优选的实施方式中，所述定位件1213各不相同，以适应装夹不同的工件，具有通用性。
在另一实施例中，所述定位件固接于所述固定底座11顶端。
进一步，所述承载板1212的左右两侧均设有限位装置1214。
在优选的实施方式中，位于所述承载板1212左侧的限位装置1214固接于所述固定底座11的底端，位于所述承载板1212右侧的限位装置1214固接于所述固定底座11的顶端
所述第一定位装置121通过位于所述定位件1213顶端的定位部1213a对工件的前端进行定位固定，所述第一驱动气缸1211驱动所述定位件1213延水平方向左右往复滑动，以便于通过不同的定位件1213装夹固定不同的工件，同时定位装置1214进行限位，防止所述第一驱动气缸1211超出行程。
进一步，所述第二定位装置122包括：固定座1221；固接于所述固定座1221顶端的第一固定件1222；以及固接于所述第一固定件1222表面的第一定位销1223。
所述第二定位装置122通过所述第一定位销1223对所述工件的中部进行定位固定。
进一步，所述第三定位装置123包括：第二驱动气缸1231；其通过气缸固定座1235固接于所述固定底座11的底端；
与所述第二驱动气缸1231的动力输出端相固接的连接板1232；
分别固接于所述连接板1232两端的第二固定件1233；以及
固接于所述第二固定件1233顶端的第二定位销1234；
其中，所述第三定位装置123延水平方向倾斜设置。
所述第二驱动气缸1231驱动所述连接板1232向上顶升，同时带动所述第二定位销1234向上顶升，所述第二定位销1234对工件的后端进行定位固定。
进一步，所述旋转压紧装置131包括：顶升旋转气缸1311；与所述顶升旋转气缸1311的动力输出端相固接的至少一个的转接块1312；以及固接于所述转接块1312底端的第一压头1313。
所述顶升旋转气缸131驱动所述第一压头133延竖直方向上下往复活动，以便于所述第一压头1313对工件的前端进行压紧固定，防止工件加工时活动。
进一步，所述第一压紧装置132包括：第一驱动装置1321，其通过第一固定座1326固接于所述固定底座11的侧端；
与所述第一驱动装置1321的动力输出端相固接的第一转动件1322；
与所述第一转动件1322相固接的固定横梁1323；
分别固接于所述固定横梁1323两端的第二压头1324；以及
与所述第二压头1324相匹配的支撑座1325。
所述第一驱动装置1321可驱动所述第二压头1324延竖直方向转动，以便于所述第二压头1324与所述支撑座1325相配合，对工件进行压紧固定或者松开的操作。
进一步，所述第二压紧装置133包括：第二驱动装置1331；
与所述第二驱动装置1331的动力输出端相固接的第二转动件1332；
与所述第二转动件1332一端相固接的中间连接件1333；以及
固接于所述中间连接件1333一端的第三定位销1334及第三压头1335。
在优选的实施方式中，所述第二驱动装置1331其通过第二固定座1336 固接于所述固定底座11的顶端。
所述第二驱动装置1331驱动所述第三定位销1334及第三压头1335延竖直方向转动，所述第三定位销1334可对工件进行定位固定，所述第三压头1335可对工件进行压紧固定，便于工件的后续加工。
进一步，相邻的两所述第二定位装置122及两所述第三定位装置123均镜像设置。
综上所述，本发明提供了一种用于焊接工件的定位治具，其结构简单，便于零部件的组装、更换及维修，且易于操作，通过定位组件进行定位固定，通过压紧组件进行压紧固定，自动化程度高，大大提高了工作效率，降低了生产成本，且同时可对多个工件进行装夹，进一步提高了工作效率，具有广阔的市场应用价值。
这里说明的设备数量和处理规模是用来简化本发明的说明的。对本发明的应用、修改和变化对本领域的技术人员来说是显而易见的。
尽管本发明的实施方案已公开如上，但其并不仅仅限于说明书和实施方式中所列运用。它完全可以被适用于各种适合本发明的领域。对于熟悉本领域的人员而言，可容易地实现另外的修改。因此在不背离权利要求及等同范围所限定的一般概念下，本发明并不限于特定的细节和这里示出与描述的图例。

Claims (9)

  1. 一种用于焊接工件的定位治具，其特征在于，包括：固定底座(11)；以及设于所述固定底座(11)顶端的定位组件(12)及压紧组件(13)；
    其中，所述定位组件(12)包括：设于所述固定底座(11)一端的可活动的第一定位装置(121)；固接于所述固定底座(11)中部的至少一组的第二定位装置(122)；以及设于所述固定底座(11)另一端的至少一组的第三定位装置(123)；
    所述压紧组件(13)包括：设于所述固定底座(11)一端的旋转压紧装置(131)；设于所述固定底座(11)中部的第一压紧装置(132)；以及设于所述旋转压紧装置(131)旁侧的第二压紧装置(133)。
  2. 如权利要求1所述的用于焊接工件的定位治具，其特征在于，所述第一定位装置(121)包括：第一驱动气缸(1211)；
    与所述第一驱动气缸(1211)的动力输出端相固接的承载板(1212)；以及
    固接于所述承载板(1212)顶端至少一个的定位件(1213)；
    其中，所述定位件(1213)的顶端向上凸起延伸有至少2个的定位部(1213a)。
  3. 如权利要求2所述的用于焊接工件的定位治具，其特征在于，所述承载板(1212)的左右两侧均设有限位装置(1214)。
  4. 如权利要求1所述的用于焊接工件的定位治具，其特征在于，所述第二定位装置(122)包括：固定座(1221)；
    固接于所述固定座(1221)顶端的第一固定件(1222)；以及
    固接于所述第一固定件(1222)表面的第一定位销(1223)。
  5. 如权利要求1所述的用于焊接工件的定位治具，其特征在于，所述第三定位装置(123)包括：第二驱动气缸(1231)；其通过气缸固定座(1235)固接于所述固定底座(11)的底端；
    与所述第二驱动气缸(1231)的动力输出端相固接的连接板(1232)；
    分别固接于所述连接板(1232)两端的第二固定件(1233)；以及
    固接于所述第二固定件(1233)顶端的第二定位销(1234)；
    其中，所述第三定位装置(123)延水平方向倾斜设置。
  6. 如权利要求1所述的用于焊接工件的定位治具，其特征在于，所述旋转压紧装置(131)包括：顶升旋转气缸(1311)；
    与所述顶升旋转气缸(1311)的动力输出端相固接的至少一个的转接块(1312)；以及
    固接于所述转接块(1312)底端的第一压头(1313)。
  7. 如权利要求1所述的用于焊接工件的定位治具，其特征在于，所述第一压紧装置(132)包括：第一驱动装置(1321)，其通过第一固定座(1326)固接于所述固定底座(11)的侧端；
    与所述第一驱动装置(1321)的动力输出端相固接的第一转动件(1322)；
    与所述第一转动件(1322)相固接的固定横梁(1323)；
    分别固接于所述固定横梁(1323)两端的第二压头(1324)；以及
    与所述第二压头(1324)相匹配的支撑座(1325)。
  8. 如权利要求1所述的用于焊接工件的定位治具，其特征在于，所述第二压紧装置(133)包括：第二驱动装置(1331)；
    与所述第二驱动装置(1331)的动力输出端相固接的第二转动件(1332)；
    与所述第二转动件(1332)一端相固接的中间连接件(1333)；以及
    固接于所述中间连接件(1333)一端的第三定位销(1334)及第三压头(1335)。
  9. 如权利要求1所述的用于焊接工件的定位治具，其特征在于，相邻的两所述第二定位装置(122)及两所述第三定位装置(123)均镜像设置。
PCT/CN2019/125772 2019-12-16 2019-12-16 一种用于焊接工件的定位治具 Ceased WO2021119958A1 (zh)

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