Flexible clamp for spot welding of body-in-white parts

Abstract

The utility model discloses a flexible clamp for spot welding of a body-in-white part. The flexible clamp comprises a clamp base, an end fixing and positioning unit, a middle supporting and adjusting unit and an XY adjustable stacking block. The clamp base comprises a hole bottom plate and a plurality of XY adjustable stacking blocks, the hole bottom plate is provided with a plurality of XY adjustable stacking blocks which are used for being adjusted in the XY direction and provided with scales at intervals, and the XY adjustable stacking blocks located at the two ends are provided with end fixing and positioning units used for fixing the ends of a flexible workpiece to be detected. The XY adjustable stacking block located in the middle is provided with a middle supporting and adjusting unit used for fixing and supporting the middle position of the flexible workpiece to be detected. According to the utility model, the aim of independently manufacturing a trial-manufacture clamp for a project sample piece is fulfilled, and the design and processing period of the formal clamp is not required to be compressed, so that the trial-manufacture efficiency and precision of the sample piece are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile manufacturing, and in particular relates to a flexible clamp used for spot welding of body-in-white parts. Background Art

[0002] At present, robot spot welding fixtures have been widely used in the field of body-in-white welding. However, every time a spot welding project starts, there will be a need for sample trial production. At this time, the project is at the beginning stage and the formal fixture has just begun to be designed. For this reason, samples will be spot welded by manual holding or the design and production cycle of the formal spot welding fixture will be compressed. Manual holding will result in insufficient sample accuracy, and compressing the design and production cycle of the formal fixture will cause the fixture to be modified later.

[0003] No patent documents related to this application were found through the search. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and propose a flexible fixture for spot welding of body-in-white parts, which is mainly used in the trial production stage of body-in-white parts. The fixture is highly flexible and adaptive. Compared with traditional fixtures, the flexible fixture can reduce the cost of fixture design, processing and replacement, and improve work efficiency.

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] A flexible fixture for spot welding of body-in-white parts, characterized in that it includes a fixture base, an end fixing and positioning unit, an intermediate support adjustment unit, an XY adjustable stacking block and an articulated arm three-dimensional coordinate measuring instrument; the fixture base includes a hole bottom plate and a plurality of XY adjustable stacking blocks, a plurality of XY adjustable stacking blocks with scales for adjustment in the XY direction are arranged at intervals on the hole bottom plate, the XY adjustable stacking blocks located at both ends are installed with end fixing and positioning units for fixing the ends of the flexible workpiece to be measured, the XY adjustable stacking block located in the middle is installed with an intermediate support adjustment unit for fixing and supporting the middle position of the flexible workpiece to be measured, the articulated arm three-dimensional coordinate measuring instrument is arranged on the fixture base, and the articulated arm three-dimensional coordinate measuring instrument is used to measure the spatial position data of the positioning reference surface of each point of the flexible workpiece to be measured.

[0007] Moreover, the XY adjustable stacking block includes an insertion plate, a connecting plate and a superimposed plate. A plug-in column adapted to the hole of the hole bottom plate is formed in the middle of the lower surface of the insertion plate, and a limiting protrusion is formed on the upper surface of the insertion plate. The connecting plate is installed on the insertion plate, and the superimposed plate is installed on the connecting plate. Two long mounting holes are correspondingly provided on one side of the insertion plate, the connecting plate and the superimposed plate for installing the damping base unit and the damping adjustment unit. The XY adjustable stacking block is also provided with a mounting hole for a three-coordinate measuring instrument of an articulated arm for fixed installation during measurement.

[0008] Moreover, the end fixed positioning unit and the intermediate support adjustment unit both include an L-shaped base, a damping adjustment mechanism, a positioning pin and a strong magnetic pressure block; a top column is installed on the L-shaped base through the damping adjustment mechanism, and an L-shaped customized support block is installed on the top of the top column through a positioning pin, and a strong magnetic pressure block is provided at the end of the L-shaped customized support block for clamping the flexible workpiece to be tested.

[0009] Moreover, the end fixing positioning unit also includes a horizontal plate, which is installed perpendicular to one side of the top column. An L-shaped custom support block is also installed on the horizontal plate, and a strong magnetic pressure block is also installed at the end of the L-shaped custom support block to achieve support clamping.

[0010] The advantages and positive effects of the utility model are:

[0011] The utility model can perform adaptive and flexible adjustment of the fixture according to the shape, positioning surface and positioning hole of the body-in-white parts, so as to realize a set of tooling to meet the needs of batch trial production of multiple product samples. The application of the utility model achieves the goal of not having to make trial production fixtures for project samples separately, and no longer has to compress the design and processing cycle of the formal fixture, effectively improving the efficiency and accuracy of trial production of samples.

[0012] The working principle of the utility model is to use the fixture platform, XY adjustable stacking unit, damping adjustment mechanism and a small number of positioning pins to achieve matching with the shape of the workpiece; a small number of positioning pins, the structural design of the flexible fixture is the key to achieve matching between the flexible material and the workpiece shape; the structural design includes the shape, size, hole position and channel of the fixture. This flexible fixture is segmented and consists of multiple independently deformable intermediate support adjustment units, each of which can independently adjust the shape to adapt to different parts of the workpiece. The structural design fully considers the shape, size and special requirements of the workpiece to ensure that the fixture can stably clamp the workpiece under various conditions.

[0013] An important feature of the utility model is its adaptability, which can adapt to workpieces of different shapes without the need to redesign and process the fixture, greatly improving production efficiency; the adaptability of the flexible fixture is achieved through the adjustability of the damping adjustment unit and the supporting structural parts. Its plasticity enables the fixture to adapt to the shape of the workpiece, and the deformable structural design can be adjusted accordingly according to the shape of the workpiece. By changing the position of the adjustable element of the fixture, combined with replacing the elements or assemblies of the adjustment part, the installation requirements of different products can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of a flexible fixture for spot welding of body-in-white parts in the utility model;

[0015] Figure 2 yes Figure 1 Schematic diagram of the middle fixture base;

[0016] Figure 3 yes Figure 1 Schematic diagram of the XY adjustable stacking unit structure;

[0017] Fixture base 1; XY adjustable stacking block unit 2; damping adjustment mechanism 3; flexible workpiece to be measured 4; positioning pin 5; customized support block 6; strong magnetic pressure block 7; articulated arm three-dimensional coordinate measuring instrument 8. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and through specific embodiments. The following embodiments are merely descriptive and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0019] like Figure 1 As shown, different flexible workpieces to be tested 4 are positioned and clamped by the flexible fixture units composed of 1, 2, 3, 5, 6, 7, and 8. The fixture is adaptively and flexibly adjusted according to the shape, positioning surface, and positioning hole of the body-in-white parts, so that one set of tooling can meet the needs of batch trial production of multiple product samples.

[0020] A flexible fixture for spot welding of body-in-white parts, comprising a fixture base 1, an end fixing and positioning unit, an intermediate support adjustment unit 3, an XY adjustable stacking block 4 and an articulated arm three-dimensional coordinate measuring instrument 8; the fixture base comprises a hole bottom plate and a plurality of XY adjustable stacking blocks, a plurality of XY adjustable stacking blocks with scales for adjustment in the XY direction are arranged at intervals on the hole bottom plate, the XY adjustable stacking blocks at both ends are installed with end fixing and positioning units for fixing the ends of the flexible workpiece to be measured, the XY adjustable stacking blocks in the middle are installed with an intermediate support adjustment unit for fixing and supporting the middle position of the flexible workpiece to be measured, the articulated arm three-dimensional coordinate measuring instrument 8 is arranged on the fixture base, and the articulated arm three-dimensional coordinate measuring instrument is used to measure the spatial position data of the positioning reference surface of each point of the flexible workpiece to be measured;

[0021] The XY adjustable stacking block comprises an insert plate 2-3, a connecting plate 2-2 and a superimposed plate 2-1, a plug column adapted to the hole of the hole bottom plate is formed in the middle of the lower surface of the insert plate, and a limiting convex column is formed on the upper surface of the insert plate, the connecting plate is mounted on the insert plate, and the superimposed plate is mounted on the connecting plate, and two mounting long holes are correspondingly provided on one side of the insert plate, the connecting plate and the superimposed plate for mounting the damping base unit and the damping adjustment unit;

[0022] The damping adjustment unit is a prior art and will not be elaborated here.

[0023] The end fixing positioning unit and the middle support adjustment unit both include an L-shaped base, a damping adjustment mechanism, a positioning pin 5 and a strong magnetic pressure block 7; a top column is installed on the L-shaped base through the damping adjustment mechanism, and an L-shaped customized support block 6 is installed on the top of the top column through a positioning pin, and a strong magnetic pressure block is provided at the end of the L-shaped customized support block for clamping the flexible workpiece to be measured. The end fixing positioning unit also includes a horizontal plate, which is installed perpendicular to one side of the top column, and an L-shaped customized support block is also installed on the horizontal plate, and a strong magnetic pressure block is also installed at the end of the L-shaped customized support block to achieve support clamping.

[0024] The utility model can perform adaptive and flexible adjustment of the fixture according to the shape, positioning surface and positioning hole of the body-in-white parts, so as to realize a set of tooling to meet the needs of batch trial production of multiple product samples. The application of the utility model achieves the goal of not having to make trial production fixtures for project samples separately, and no longer has to compress the design and processing cycle of the formal fixture, effectively improving the efficiency and accuracy of trial production of samples.

[0025] The working principle of the utility model is to use the fixture platform, XY adjustable stacking unit, damping adjustment mechanism and a small number of positioning pins to achieve matching with the shape of the workpiece; a small number of positioning pins, the structural design of the flexible fixture is the key to achieve matching between the flexible material and the workpiece shape; the structural design includes the shape, size, hole position and channel of the fixture. This flexible fixture is segmented and consists of multiple independently deformable intermediate support adjustment units, each of which can independently adjust the shape to adapt to different parts of the workpiece. The structural design fully considers the shape, size and special requirements of the workpiece to ensure that the fixture can stably clamp the workpiece under various conditions.

[0026] The utility model determines the positions of various positioning units of the flexible fixture pre-set on the flexible fixture based on the shape of the body-in-white part (positioning surface, positioning hole, SPR information) through data collected from the part model and combined with data support provided by an articulated arm three-coordinate measuring instrument.

[0027] The above shows and describes the basic principles, main features and advantages of this patent. Although the embodiments and drawings of the present utility model are disclosed for illustrative purposes, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present utility model and the appended claims. Therefore, the scope of the present utility model is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A flexible fixture for spot welding of body-in-white parts, characterized in that: It includes a fixture base, an end fixing positioning unit, an intermediate support adjustment unit, an XY adjustable stacking block and an articulated arm three-dimensional coordinate measuring instrument; the fixture base includes a hole bottom plate and a plurality of XY adjustable stacking blocks, and a plurality of XY adjustable stacking blocks with scales for adjustment in the XY direction are arranged at intervals on the hole bottom plate, the XY adjustable stacking blocks located at both ends are installed with end fixing positioning units for fixing the ends of the flexible workpiece to be measured, and the XY adjustable stacking block located in the middle is installed with an intermediate support adjustment unit for fixing and supporting the middle position of the flexible workpiece to be measured, and the articulated arm three-dimensional coordinate measuring instrument is arranged on the fixture base, and the articulated arm three-dimensional coordinate measuring instrument is used to measure the spatial position data of the positioning reference surface of each point of the flexible workpiece to be measured.

2. The flexible fixture for spot welding of body-in-white parts according to claim 1 is characterized in that: The XY adjustable stacking block includes an insertion plate, a connecting plate and a superimposed plate. A plug-in column adapted to the hole of the hole bottom plate is formed in the middle of the lower surface of the insertion plate, and a limiting convex column is formed on the upper surface of the insertion plate. The connecting plate is mounted on the insertion plate, and the superimposed plate is mounted on the connecting plate. Two long mounting holes are correspondingly provided on one side of the insertion plate, the connecting plate and the superimposed plate for mounting the damping base unit and the damping adjustment unit. The XY adjustable stacking block is also provided with a mounting hole for a three-coordinate measuring instrument of an articulated arm for fixed installation during measurement.

3. The flexible fixture for spot welding of body-in-white parts according to claim 1 is characterized in that: The end fixed positioning unit and the intermediate support adjustment unit both include an L-shaped base, a damping adjustment mechanism, a positioning pin and a strong magnetic pressure block; a top column is installed on the L-shaped base through the damping adjustment mechanism, and an L-shaped customized support block is installed on the top of the top column through a positioning pin, and a strong magnetic pressure block is provided at the end of the L-shaped customized support block for clamping the flexible workpiece to be tested.

4. The flexible fixture for spot welding of body-in-white parts according to claim 3 is characterized in that: The end fixing and positioning unit also includes a horizontal plate, which is installed perpendicular to one side of the top column. An L-shaped custom support block is also installed on the horizontal plate, and a strong magnetic pressure block is also installed on the end of the L-shaped custom support block to achieve support clamping.

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