Welding fixture and robot positioner

Abstract

The utility model relates to the technical field of welding fixtures, and discloses a welding fixture and a robot positioner, the welding fixture comprises a middle part with a strip-shaped structure, and a small end part and a large end part which are arranged at the two ends of the middle part; the small end part comprises a mounting plate; the large end part comprises a clamping plate; the centers of the mounting plate and the clamping plate are aligned with the axis of the middle part; a pressing plate base is installed on the upper end face of the clamping plate, and a connecting piece is installed on the top face of the pressing plate base. A plurality of positioning clamping pieces are mounted on the other end faces, except the upper end face, of the clamping plate, and a jacking piece is mounted on at least one positioning clamping piece; the device further comprises a special-shaped pressing plate. At least two workpiece pressing points with a first interval are formed on the special-shaped pressing plate, and a kidney-shaped groove matched with the connecting piece is formed in the special-shaped pressing plate. According to the scheme, the clamp is simple in structure, stable in clamping and particularly suitable for the clamping application scene of workpieces with outer flanges and inner thin-wall type box structures, the clamping mode of the workpieces of the type is completely changed, no pressing force is applied to the thin walls, and the hidden danger of deformation of thin-wall box bodies during workpiece clamping is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding fixture technical field, concretely relates to a welding fixture and robot positioner. BACKGROUND

[0002] In the current industrial manufacturing field, especially in the machining process of outer flange inner thin-walled box structure workpiece, the traditional fixture system exposes a series of limitations.

[0003] The traditional fixture mainly relies on manual overturning and positioning, and usually needs to be fixed to the workpiece through at least four bolts. This operation mode is not only inefficient, but also completely relies on manpower, which makes the whole process time-consuming and laborious, and increases the operation complexity. More importantly, the positioning mode of using bolts directly on the thin-walled box is prone to cause workpiece deformation, because the local pressure applied by the bolt exceeds the range that the thin-walled structure can bear, thereby affecting the quality of the final product. In addition, the existing fixture design fails to effectively integrate with the robot positioner, limiting the application potential of the automated production line and failing to meet the increasing demand of modern manufacturing industry for efficiency, precision and automation. SUMMARY

[0004] The utility model intends to provide a welding fixture and robot positioner, which satisfies the rapid clamping of thin-walled box structure and realizes the welding position requirement, has simple fixture structure, convenient operation, stable clamping and accurate positioning, and avoids the deformation of the box in the clamping application scene of outer flange inner thin-walled box structure workpiece.

[0005] The utility model provides a basic scheme: a welding fixture, comprising a middle part, a small end part and a large end part installed at both ends of the middle part, the middle part has a strip structure, the small end part comprises an installation plate, the large end part comprises a clamping plate, the center of the installation plate and the clamping plate is aligned with the axis of the middle part,

[0006] A pressing plate base is installed in the middle of the upper end face of the clamping plate, the top surface of the pressing plate base is provided with a connecting piece, a plurality of positioning clamps are installed on the end faces of the clamping plate except the upper end face, and at least one positioning clamp is provided with a jacking piece,

[0007] Further comprising a special-shaped pressing plate, the special-shaped pressing plate is provided with at least two workpiece pressing points with a first spacing, and a waist-shaped groove adapted to the connecting piece is formed in the special-shaped pressing plate.

[0008] The utility model is based on a welding fixture, and further provides a robot positioner, the robot positioner is provided with the welding fixture, and the small end part of the welding fixture is connected and installed with the robot positioner.

[0009] The working principle and advantages of the utility model lie in that

[0010] The clamping mode of the box structure workpiece with outer flange and inner thin wall is completely changed from the existing mode of directly clamping the thin wall plate of the box to the mode of clamping the flanges at two ends, and there is no pressure on the thin wall, and the deformation risk of the thin wall box during clamping of the workpiece is avoided.

[0011] The fixture structure designed in the scheme can be quickly and conveniently installed on the robot positioner through the small end part, and can be linked with the robot control after clamping the workpiece, so that the automatic operation of the workpiece during welding of the workpiece is facilitated. The large end part is provided with a special-shaped pressing plate, a pressing plate base and a connecting piece, and constitutes a quick pressing structure. The two workpiece pressing points formed by the special design of the special-shaped pressing plate can simultaneously press the two regions of the flange surface of the workpiece, so that the clamping stability is ensured, and the flange surface is acted on instead of the thin wall box, so that the deformation risk caused by direct clamping of the thin wall box of the workpiece is avoided. During use, the connecting piece only needs to be loosened and tightened, the position adjustment of the pressing plate is realized through the waist-shaped groove, and the loading and unloading operation can be completed by moving the pressing plate forward and backward, so that the work load is greatly reduced. The large end part is provided with a plurality of positioning clamping pieces and jacking pieces, the size and position of which are matched with the workpiece, so that the size consistency of the box structure workpiece after falling into the fixture is ensured, and the deflection is avoided, so that the robot program correction rate is reduced, the robot welding point searching and guiding time is reduced, and the work efficiency is improved. The weight reduction holes are designed on each component to reduce the torque load of the positioner.

[0012] The welding fixture has the advantages of simple structure, convenient operation, stable clamping, accurate positioning, easy low-cost production and suitability for popularization and use, and is especially suitable for clamping application scenarios of the box structure workpiece with outer flange and inner thin wall. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The utility model discloses a kind of welding fixture structures provided by the utility model embodiment Figure 1 ;

[0014] Figure 2 The utility model discloses a kind of welding fixture structures provided by the utility model embodiment Figure 2 ;

[0015] Figure 3 It is a front view of a kind of welding fixture provided by the utility model embodiment;

[0016] Figure 4 It is a right view of a kind of welding fixture provided by the utility model embodiment;

[0017] Figure 5 It is a structure schematic view of robot positioner provided by the utility model embodiment;

[0018] The markings in the attached drawings of the instruction manual include: center 1, clamping plate 2, pressure plate base 21, connector 22, positioning clip 23, clamping part 24, irregular pressure plate 25, workpiece pressing point 251, waist-shaped groove 252, mounting plate 3, fixing part 4, weight reduction hole 5, robot positioner 6, workpiece 7. Detailed Implementation

[0019] The following detailed explanation illustrates the specific implementation methods:

[0020] The basic implementation examples are as follows: Figure 1 As shown: A welding fixture includes a middle part 1, and small ends and large ends installed at both ends of the middle part 1.

[0021] The middle section 1 has a strip-shaped structure. In this embodiment, the strip-shaped structure of the middle section 1 is a cuboid structure with a length of 1000-3000mm, a width of 600-740mm, and a height of 600-780mm. This size is reasonable for use as a clamping arm, offering advantages in work efficiency, detection accuracy, and ease of operation. Several fixing members 4 are installed at the end of the middle section 1 connected to the large end face. These fixing members 4 are evenly distributed at the connection between the middle section 1 and the large end face. In this embodiment, one fixing member 4 is installed on each of the four faces of the cuboid structure of the middle section 1. The fixing member 4 has a triangular plate-like structure, and during installation, it connects the middle section 1 and the large end face through two right-angled sides, improving installation stability.

[0022] The large end includes a clamping plate 2, the area of ​​which is adapted to the size of the workpiece 7 being clamped. In this embodiment, the clamping plate 2 has a length of 600-780mm and a width of 600-740mm, and its area is adapted to the required size of the workpiece being clamped; for example Figure 2 and Figure 3 As shown, a pressure plate base 21 is installed at the middle part 1 of the upper end face 1 of the clamping plate 2. The top surface of the pressure plate base 21 is flush with the upper end face of the clamping plate 2. A connector 22 is installed on the top surface of the pressure plate base 21. In this embodiment, the connector 22 is a bolt. The top surface of the pressure plate base 21 has mounting holes adapted to the bolt. Several positioning clips 23 are installed on the other end faces of the clamping plate 2, excluding the upper end face. The other end faces include the lower end face opposite to the upper end face and the left and right end faces. The number of positioning clips 23 installed on the left and right end faces is greater than the number of positioning clips 23 installed on the lower end face. In this embodiment, three positioning clips 23 are installed on the left and right end faces and two positioning clips 23 are installed on the lower end face. The positioning clips 23 have an L-shaped structure, which facilitates installation and improves stability during positioning. At least one positioning clip 23 is equipped with a clamping member 24. In this embodiment, a clamping member 24 is installed on the positioning clip 23 located in the center of the right end face. The clamping member 24 is a clamping screw.

[0023] Further comprising a special-shaped pressing plate 25; the special-shaped pressing plate 25 is formed with at least two workpiece pressing points 251 with a first spacing, the first spacing is matched with the spacing of the positioning point of the outer flange of the workpiece; the special-shaped pressing plate 25 is provided with a waist-shaped groove 252 matched with the connecting piece 22; the long axis extension line of the waist-shaped groove 252 is located on the vertical plane where the axis of the middle part 1 is located, and is parallel to the axis of the middle part 1.

[0024] The small end part comprises a mounting plate 3; the axes of the center alignment of the mounting plate 3 and the clamping plate 2 of the middle part 1, that is, the mounting plate 3 and the clamping plate 2 are respectively symmetrically mounted at both ends of the middle part 1, so as to realize the balance of the whole clamp; the area of the mounting plate 3 is smaller than that of the clamping plate 2, in the embodiment, the length of the mounting plate 3 is 380mm, and the width is 360mm, the size of the mounting plate 3 is matched with the size of the connecting part of the robot positioner 6, so as to ensure the clamping and mounting of the workpiece.

[0025] As shown in Figure 2 , Figure 3 and Figure 4 , at least one lightening hole 5 is formed on the middle part 1, the small end part, the large end part and the special-shaped pressing plate 25. In the embodiment, a plurality of lightening holes 5 are formed on each surface of the middle part 1 along the axis direction; the clamping plate 2 of the large end part is provided with a first lightening hole in the center, a plurality of second lightening holes are formed around the first lightening hole, the radius of the first lightening hole is greater than that of the second lightening hole; the mounting plate 3 of the small end part is provided with a lightening hole 5 in the center; the special-shaped pressing plate 25 is symmetrically provided with two lightening holes 5 on both sides of the waist-shaped groove 252. The local position and size of all lightening holes consider the stress factors of each component, so as to ensure that the weight reduction does not affect the stress of each component.

[0026] As shown in Figure 5 , the scheme further provides a robot positioner 6 provided with the welding clamp, in the embodiment, two welding clamps are mounted on the robot positioner 6, and a workpiece clamping space is formed between the two welding clamps; the clamped workpiece 7 is a box structure with an outer flange and an inner thin wall, the box structure is square, both ends are provided with flanges with a thickness of about 30mm, and the main body of the box is a thin wall plate with a thickness of about 3mm.

[0027] Specifically in use, each component is installed according to the above design to form the welding fixture of the present solution, the welding fixture is connected and installed with the robot positioner 6 through the small end part, linkage control of the fixture and the robot is realized, the positions of the two welding fixtures are adjusted through the robot control system, so that the clamping workpiece space formed between the two welding fixtures is adapted to the size of the workpiece 7; the waist-shaped groove 252 of the special-shaped pressing plate 25 and the bolt limit the movement of the pressing plate, the movement direction is close to the small end part, and the workpiece 7 is given way; the workpiece 7 is hoisted from the upper part of the fixture into the clamping workpiece space formed between the two welding fixtures, the bottom of the workpiece 7 contacts the positioning clamping piece 23 on the lower end surface of the clamping plate 2, at this time, all the positioning clamping pieces 23 realize clamping and limiting of the left and right parts and the lower part of the workpiece 7; in the direction away from the small end surface, the special-shaped pressing plate 25 is moved, the two regions of the flange surface of the workpiece 7 can be pressed at the same time, the lock bolt is tightened, the special-shaped pressing plate 25 is fixed, and the upper positioning of the workpiece 7 is realized; the jacking screw is tightened, and the vertical positioning of the box structure is performed; at this time, the precise positioning and stable clamping of the workpiece 7 are realized through the positioning clamping pieces 23, the special-shaped pressing plate 25 and the jacking piece 24.

[0028] The welding fixture and the robot positioner provided by the embodiment completely change the clamping mode of the box structure workpiece with an outer flange and an inner thin wall, change the existing mode of directly clamping the thin wall plate of the box to the mode of clamping the flanges at two ends, and there is no pressure on the thin wall, so that the deformation risk of the thin wall box during clamping of the workpiece is avoided.

[0029] The fixture structure designed in the present solution can be quickly and conveniently installed on the robot positioner through the small end part, linkage control with the robot can be realized after clamping the workpiece, and automatic operation of the workpiece during welding of the workpiece is facilitated. The upper part of the large end part of the fixture is designed with a special-shaped pressing plate, a pressing plate base and a connecting piece, forming a quick pressing structure, the two workpiece pressing points of the special-shaped pressing plate are specially designed, the two regions of the flange surface of the workpiece can be pressed at the same time, the stable clamping is ensured, and the deformation risk caused by directly clamping the thin wall box of the workpiece is avoided, during use, only the connecting piece needs to be loosened and tightened, the position is adjusted in a sliding mode through the waist-shaped groove, and the loading and unloading operations can be completed by moving the pressing plate forward and backward, so that the work load is greatly reduced; the large end part is designed with a plurality of positioning clamping pieces and jacking pieces, the size and position are adapted to the workpiece, the size of the box structure workpiece is consistent after falling into the fixture, and deviation is not caused, so that the robot program correction rate is reduced, the robot welding seeking guide time is reduced, and the work efficiency is improved. The weight reduction holes are designed on each component to reduce the torque load of the positioner.

[0030] The welding fixture has the advantages of simple structure, convenient operation, stable clamping, precise positioning, easy low-cost production and suitability for popularization and use, and is especially suitable for clamping application scenarios of the box structure workpiece with an outer flange and an inner thin wall.

[0031] The above-mentioned is only the embodiment of the present application, and the common knowledge of the specific structure and characteristics in the scheme is not described in detail, the ordinary skilled in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field, and has the ability to apply the conventional experimental means before the date, the ordinary skilled in the art can improve and implement the present scheme under the inspiration given in the present application, and some typical known structures or known methods should not become an obstacle for the ordinary skilled in the art to implement the present application. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application.

Claims

1. A welding fixture, characterized by, The middle part has a strip structure; the small end part includes a mounting plate; the large end part includes a clamping plate; the center of the mounting plate and the clamping plate is aligned with the axis of the middle part; The upper end surface of the clamping plate is provided with a pressing plate base, wherein the top surface of the pressing plate base is provided with a connecting piece; the other end surfaces of the clamping plate are provided with a plurality of positioning clamps, and at least one positioning clamp is provided with a jacking piece; The special-shaped pressing plate is provided with at least two workpiece pressing points with a first spacing; the special-shaped pressing plate is provided with a waist-shaped groove matched with the connecting piece.

2. A welding fixture according to claim 1, wherein The strip structure of the middle part is a cuboid structure.

3. A welding fixture according to claim 1, wherein The middle part is provided with a plurality of fixing pieces at one end connected with the large end part.

4. A welding fixture according to claim 3, wherein The plurality of fixing pieces are uniformly distributed at the connection between the middle part and the large end part.

5. The welding fixture of claim 1, wherein, The top surface of the pressing plate base is flush with the upper end surface of the clamping plate.

6. A welding fixture according to claim 1, wherein The positioning clamp has an L-shaped structure.

7. The welding fixture of claim 1, wherein, The area of the mounting plate is smaller than that of the clamping plate.

8. The welding fixture of claim 1, wherein, At least one weight-reducing hole is formed on the middle part, the small end part, the large end part and the special-shaped pressing plate.

9. The welding fixture of claim 1, wherein, The long axis extension line of the waist-shaped groove is located on the vertical plane where the middle part axis is located and is parallel to the middle part axis.

10. A robotic positioner characterized by, A welding fixture is installed, and any one of claims 1-9 is installed through the small end part and the robot positioner.

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