Friction stir welding equipment with positioning platform

Abstract

The present invention discloses a friction stir welding device with a positioning platform, comprising a main body support frame and a welding structure and a positioning platform arranged on the main body support frame, the positioning platform comprising a weld detection platform, two weld detection structures are symmetrically arranged on the weld detection platform, the data of each pressure sensor is numbered and transmitted to a remote control center through a communicator, at this time, the remote control center processes the weld between two welding bodies by controlling a grinding wheel, and transmits the processed weld area data to a motion control center, guides subsequent processing and welding processes according to a three-dimensional stereogram of the weld, realizes precise positioning and adjustment of the weld, thereby improving welding quality and ensuring the service life of a stirring needle, and transmits the processed weld area data to the motion control center, so that the weld flatness is improved, further improving the quality of the welding area and preventing the stirring needle from being damaged due to the unevenness of the weld.

Description

Technical Field

[0001] The present application relates to the field of high-precision positioning processing of stir friction welding equipment, and in particular to a stir friction welding equipment with a positioning platform. Background Art

[0002] The friction stir welding process is to insert a rotating stirring head along the workpiece between the contact surfaces during the friction stir welding process. The materials are plasticized by friction heat and welded together. This process is particularly suitable for joining non-ferrous metals with low melting points and mixed connections. Through friction stir welding, even difficult-to-weld materials or dissimilar materials such as aluminum, magnesium, copper, titanium or steel can be joined together. The friction stir welding process can be used in various industries, and its application areas include automobile manufacturing, aviation industry and electronics industry. Friction stir welding has the advantages of higher welding quality, no welding defects such as pores or cracks, the ability to join different materials, relatively low heat input, high weld strength and low welding deformation, and economical and efficient joining of complex 3D geometries, saving materials through workpiece optimization, and no need for consumables such as shielding gas and filler wire. At the same time, it is a green technology with low energy consumption and environmental protection, and no need for smoke exhaust or light shielding measures. However, due to the uneven welds between welding materials in the prior art, the unevenness is manifested in the horizontal non-parallelism of the welds or the inconsistent lengths in the vertical direction. On the one hand, it will cause a back weld nodule during welding, which is specifically manifested as the metal of the weld protruding outward. The reason is that the gap between the top of the stirring needle and the bottom of the weld is too small, or there is a large gap at the bottom of the weld during product assembly, resulting in the axial extrusion force of the stirring needle squeezing the metal at the bottom to protrude toward the bottom of the weld during welding, presenting a weld nodule shape. On the other hand, it also places high requirements on the welding motion trajectory of the stirring needle. If the stirring needle cannot move along the non-parallel and non-uniform weld, the welding quality will be reduced or the stirring needle will be damaged.

[0003] Therefore, researching a method that can solve the above problems, ensure good fit between the welded material and the tooling, ensure that the gap is as small as possible and evenly distributed along the welding direction, has become a technical problem that urgently needs to be solved in this field. Summary of the invention

[0004] To solve the above problems, the technical solution adopted by the present invention is:

[0005] A friction stir welding device with a positioning platform comprises a main body support frame, a welding structure and a positioning platform arranged on the main body support frame, the positioning platform comprises a weld detection platform, two weld detection structures are symmetrically arranged on the weld detection platform, each weld detection structure comprises an adjusting rod, a grinding wheel and a sensor unit fixedly arranged on the adjusting rod, the grinding wheel can be raised and lowered and arranged on the detection platform of the weld detection structure, each of the sensor units is provided with a plurality of pressure sensors in the direction facing the corresponding welding main body, and the plurality of pressure sensors are arranged perpendicular to the ground; a communication instrument is provided between the two weld detection structures, and the communication instrument transmits the pressure of each pressure sensor to the ground. The data are numbered and transmitted to the remote control center, which obtains the three-dimensional structure of the weld according to the data of each pressure sensor; the welding structure includes a motion control center and a six-axis welding manipulator consisting of a control arm, a main arm, a large arm, a combining arm, a small arm, and a welding arm, the welding head is arranged at the free end of the welding arm, and a locator is also arranged at the free end of the welding arm. The motion control center controls the welding head through the six-axis welding manipulator to perform stirring welding movement along the weld area given by the remote control center, and the locator feeds back the position of the welding head to the remote control center to verify the movement of the welding head; a stirring needle is arranged on the welding head.

[0006] Furthermore, the sensor unit is positioned and fixed on the adjustment rod through an upper nut and a lower nut, and the positions of the upper nut and the lower nut can be adjusted.

[0007] Furthermore, the positioning platform also includes two symmetrically arranged welding body fixing mechanisms, each of which includes a supporting platform with a rectangular structure and clamps fixedly arranged on four corners of the top plane of the supporting platform.

[0008] Furthermore, each of the support platforms includes a front facade and a rear facade, the clamps protrude from the front facade or the rear facade of the support platform, and pillars that can be raised and lowered in the vertical direction are provided at positions corresponding to each of the clamps inside the support platform. The welding body is supported by the four pillars and positioned by the four clamps on the top plane of the support platform. A spacing adjustment mechanism is also provided between the front facade and the rear facade of the support platform, and the length of the welding body is positioned and clamped through the front facade and the rear facade of the support platform.

[0009] Furthermore, the clip on each of the front facades or rear facades is fixedly arranged on the front facade or rear facade via a width adjustment mechanism.

[0010] Furthermore, enclosures are arranged around the periphery of the main support frame, and the enclosures include seven enclosure units consisting of support rods and fences. Several of the enclosure units are interconnected by the same support rod to form a quadrilateral enclosure space that is closed on three sides and open on one side.

[0011] Furthermore, it also includes a control console arranged on a side of the positioning platform away from the welding structure, and the control console is provided with a remote control center and a plurality of emergency brake buttons.

[0012] Furthermore, a plurality of positioning plates are arranged on the main support frame, and the weld detection platform includes a sliding platform, a supporting structure and a detection platform in sequence from bottom to top in the vertical direction, the detection platform is fixed on the supporting structure, the supporting structure is fixed on the sliding platform, and the weld detection platform is slidably arranged on the plurality of positioning plates through the sliding platform.

[0013] Furthermore, the positioning platform also includes an auxiliary clamping mechanism, and the auxiliary clamping mechanism is symmetrically provided with a plurality of positioning platforms that are detachably fixedly arranged on the plurality of positioning plates.

[0014] Furthermore, the auxiliary clamping mechanism includes an auxiliary support, two positioning holes are symmetrically arranged on the fixed platform of the auxiliary support, a lifting motor is fixedly arranged between the two positioning holes, a lifting platform is fixedly connected to the output shaft of the lifting motor, lifting guide rods are fixedly arranged on both sides of the lifting platform, the two lifting guide rods are respectively slidably arranged through the two positioning holes, and the lifting platform moves in a vertical direction relative to the fixed platform of the auxiliary support, so as to clamp and fix the welding body placed between the lifting platform and the fixed platform.

[0015] Beneficial effects:

[0016] The friction stir welding equipment with a positioning platform of the present invention numbers the data of each pressure sensor respectively and transmits it to a remote control center through a communicator. The remote control center draws a three-dimensional stereogram of the weld between the two welding bodies based on the data of each pressure sensor for subsequent processing and welding reference. At this time, the remote control center controls the grinding wheel to process the weld between the two welding bodies, and transmits the processed weld area data to the motion control center. The subsequent processing and welding process are guided according to the three-dimensional stereogram of the weld, and precise positioning and adjustment of the weld is achieved, thereby improving the welding quality and ensuring the service life of the stirring needle. The grinding wheel is controlled by the remote control center to process the weld between the two welding bodies, and the processed weld area data is transmitted to the motion control center, so that the weld flatness is improved, the quality of the welding area is further improved, and the stirring needle is prevented from being damaged due to the unevenness of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of a friction stir welding device with a positioning platform;

[0019] Figure 2 This is a partial enlarged view of the welding structure;

[0020] Figure 3 This is a partial enlarged view of the positioning platform;

[0021] Figure 4 This is a partial enlarged view of the weld inspection platform;

[0022] Figure 5 A partial enlargement of the friction stir welding equipment with a positioning platform Figure 1 ;

[0023] Figure 6 A partial enlargement of the friction stir welding equipment with a positioning platform Figure 2 ;

[0024] Figure 7 This is a partial enlarged view of the flatness testing table;

[0025] Figure 8 This is a partial enlarged view of the auxiliary clamping mechanism. DETAILED DESCRIPTION

[0026] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0027] like Figure 1-8The present embodiment provides a friction stir welding device with a positioning platform, comprising a main body support frame 1 and a welding structure 2 and a positioning platform 3 arranged on the main body support frame 1, wherein the positioning platform 3 comprises a weld detection platform 6, wherein two weld detection structures 601 are symmetrically arranged on the weld detection platform 6, wherein each weld detection structure 601 comprises an adjusting rod 602, a grinding wheel 609 and a sensor unit 603 fixedly arranged on the adjusting rod 602, wherein the grinding wheel 609 can be raised and lowered and arranged on a detection platform 605 of the weld detection structure 601, wherein each sensor unit 603 is provided with a plurality of pressure sensors 604 in a direction toward a corresponding welding main body 3014, wherein the plurality of pressure sensors 604 are arranged perpendicular to the ground direction; a communicator 608 is provided between the two weld detection structures 601, wherein the communicator 608 divides the data of each pressure sensor 604 into The pressure sensors 604 are individually numbered and transmitted to the remote control center 501, which obtains the three-dimensional structure of the weld according to the data of each pressure sensor 604; the welding structure 2 includes a motion control center 201 and a six-axis welding manipulator 2011 composed of a control arm 202, a main arm 203, a large arm 204, a combining arm 205, a small arm 206, and a welding arm 207, a welding head 208 is arranged at the free end of the welding arm 207, and a locator 209 is also arranged at the free end of the welding arm 207. The motion control center 201 controls the welding head 208 through the six-axis welding manipulator to perform stirring welding movement along the weld area given by the remote control center 501, and the locator 209 feeds back the position of the welding head 208 to the remote control center 501 to check the movement of the welding head 208; a stirring needle 2081 is arranged on the welding head 208.

[0028] Furthermore, the sensor unit 603 is positioned and fixed on the adjustment rod 602 by an upper nut 606 and a lower nut 607 , and the length and the height position in the vertical direction of the sensor unit 603 can be adjusted by adjusting the positions of the upper nut 606 and the lower nut 607 .

[0029] Since the welds between the welding materials in the prior art are uneven, that is, the welds are not parallel in the horizontal direction or the lengths are inconsistent in the vertical direction, not only defects in the welding process are caused, resulting in reduced welding quality, but also the uneven welds will damage the stirring needle when the stirring needle moves horizontally. In the friction stir welding device with a positioning platform in this embodiment, the data of each pressure sensor 604 is numbered and transmitted to the remote control center 501 through the communicator 608. The remote control center 501 draws a three-dimensional stereogram of the weld between the two welding bodies 3014 according to the data of each pressure sensor 604 for subsequent processing and welding reference. At this time, the remote control center 501 processes the weld between the two welding bodies 3014 by controlling the grinding wheel 609, and transmits the processed weld area data to the motion control center 201. The movement of the welding head 208 is controlled by the six-axis welding manipulator. At this time, the stirring needle 2081 performs stirring welding movement along the specified weld area, which can improve the quality of the welding area and prevent the stirring needle from being damaged due to the unevenness of the weld.

[0030] Furthermore, the positioning platform 3 also includes two symmetrically arranged welding body fixing mechanisms 301, each of which includes a supporting platform 3011 of a rectangular parallelepiped structure and clamps 3012 fixedly arranged at the four corners of the top plane of the supporting platform 3011; each of the supporting platforms 3011 includes a front facade 30111 and a rear facade 30112, the clamps 3012 protrude from the front facade 30111 or the rear facade 30112 of the supporting platform 3011, and a support that can be lifted and lowered in the vertical direction is arranged at a position corresponding to each of the clamps 3012 inside the supporting platform 3011 Column 3013, the welding body 3014 is supported by the four pillars 3013 and positioned by the four clamps 3012 on the top plane of the supporting platform 3011, and a spacing adjustment mechanism is also provided between the front facade 30111 and the rear facade 30112 of the supporting platform 3011, and the length of the welding body 3014 is positioned and clamped by the front facade 30111 and the rear facade 30112 of the supporting platform 3011; the clamps 3012 on each of the front facade 30111 or the rear facade 30112 are fixedly set on the front facade 30111 or the rear facade 30112 through a width adjustment mechanism 3015.

[0031] Therefore, the friction stir welding equipment with a positioning platform in this embodiment can realize positioning and clamping of welding bodies of different lengths and widths, generally between two alloy plates, by adjusting the distance between the front facade 30111 and the rear facade 30112 of the supporting platform 3011, and the distance between the clamps 3012 on each of the front facade 30111 or the rear facade 30112.

[0032] Specifically, enclosures 4 are arranged around the periphery of the main support frame 1, and the enclosures 4 include seven enclosure units 403 composed of support rods 401 and fences 402. Several enclosure units 403 are interconnected by the same support rod 401 to form a quadrilateral enclosure space with three sides closed and one side open.

[0033] In this embodiment, the positioning platform 3 further includes a flatness detection platform 302 slidably disposed on the welding body fixing mechanism 301, and two telescopic slide rails 30113 are further disposed between the front elevation 30111 and the rear elevation 30112 of the support platform 3011. The flatness detection platform 302 includes a slide 3021, a support 3022, and a table 3023. The slide 3021 is slidably disposed on the telescopic slide 30113, and two slides 3021 are disposed on each of the telescopic slides 30113. The support 3022 is fixed on each of the slides 3021, and the table 3023 is fixed on the four supports 3022 on the two telescopic slides 30113. Preferably, the slide 3021, the support 3022, and the table 3023 are all detachably disposed on the positioning platform 3, and the slide 3021 and the structure fixed thereon need to be removed during processing.

[0034] Specifically, the welding body 3014 is located between the plane of the table top 3023 and the support 3022, and does not contact the plane of the table top 3023 and the support 3022. Distance sensors 3024 are provided at corresponding positions below the table top 3023 and above the plane of the support 3022. The local thickness of the welding body 3014 is measured by the corresponding distance sensors 3024. The overall flatness of the welding body 3014 can be measured by sliding the flatness detection table 302 along the length direction of the welding body 3014, and the flatness information is uploaded to the remote control center 501.

[0035] Furthermore, the friction stir welding equipment also includes a control console 5 arranged on a side of the positioning platform 3 away from the welding structure 2 , and a remote control center 501 and a plurality of emergency brake buttons 502 are arranged on the control console 5 .

[0036] In this embodiment, a plurality of positioning plates 101 are arranged on the main support frame 1, and the weld detection platform 6 includes a sliding platform 6011, a support structure 6012 and a detection platform 605 in sequence from bottom to top in the vertical direction, the detection platform 605 is fixed on the support structure 6012, and the support structure 6012 is fixed on the sliding platform 6011, and the weld detection platform 6 is slidably arranged on the plurality of positioning plates 101 through the sliding platform 6011, and the three-dimensional structure of the weld is detected in the length direction of the weld through the sliding of the weld detection platform 6.

[0037] Specifically, the positioning platform 3 further includes an auxiliary clamping mechanism 303 , and the auxiliary clamping mechanism 303 is symmetrically provided in plurality and is detachably fixedly disposed on the positioning platforms 1011 on the plurality of positioning plates 101 .

[0038] Further, the auxiliary clamping mechanism 303 includes an auxiliary support 3031, and two positioning holes 3032 are symmetrically arranged on the fixed platform 3036 of the auxiliary support 3031. A lifting motor 3033 is fixedly arranged between the two positioning holes 3032. A lifting platform 3034 is fixedly connected to the output shaft of the lifting motor 3033. Lifting guide rods 3035 are fixedly arranged on both sides of the lifting platform 3034. The two lifting guide rods 3035 are respectively slidably arranged through the two positioning holes 3032. The lifting platform 3034 moves in the vertical direction relative to the fixed platform 3036 of the auxiliary support 3031, and can clamp and fix the welding body 3014 placed between the lifting platform 3034 and the fixed platform 3036. The auxiliary clamping mechanism 303 is arranged to ensure the positioning of the welding body 3014 when it is too large.

[0039] In view of the fact that the welds between two welding bodies in the prior art are not parallel in the horizontal direction or have inconsistent lengths in the vertical direction, the stir friction welding equipment with a positioning platform in this embodiment, by setting a weld detection platform on the positioning platform that can move along the length direction of the weld, draws a three-dimensional stereogram of the weld between the two welding bodies according to the data of each pressure sensor on the weld detection platform, guides subsequent processing and welding process, and realizes precise positioning and adjustment of the weld, thereby improving the welding quality and ensuring the service life of the stirring needle, and controls the grinding wheel to process the weld between the two welding bodies through a remote control center, and transmits the processed weld area data to the motion control center, so as to improve the flatness of the weld, further improve the quality of the welding area and prevent the stirring needle from being damaged due to the unevenness of the weld.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A friction stir welding device with a positioning platform, comprising a main body support frame and a welding structure and a positioning platform arranged on the main body support frame, characterized in that: The positioning platform includes a weld detection platform, on which two weld detection structures are symmetrically arranged, each of which includes an adjusting rod, a grinding wheel and a sensor unit fixedly arranged on the adjusting rod, the grinding wheel can be raised and lowered on the detection platform of the weld detection structure, and each of the sensor units is provided with a plurality of pressure sensors in the direction toward the corresponding welding body, and the plurality of pressure sensors are arranged perpendicular to the ground; a communicator is provided between the two weld detection structures, and the communicator numbers the data of each pressure sensor and transmits it to a remote control center, and the remote control The center obtains the three-dimensional structure of the weld according to the data of each pressure sensor; the welding structure includes a motion control center and a six-axis welding manipulator composed of a control arm, a main arm, a large arm, a combining arm, a small arm, and a welding arm. The welding head is arranged at the free end of the welding arm, and a locator is also arranged at the free end of the welding arm. The motion control center controls the welding head through the six-axis welding manipulator to perform stirring welding movement along the weld area given by the remote control center, and the locator feeds back the position of the welding head to the remote control center to verify the movement of the welding head; a stirring needle is arranged on the welding head.

2. The friction stir welding device with a positioning platform according to claim 1, characterized in that: The sensing unit is positioned and fixed on the adjusting rod through an upper nut and a lower nut, and the positions of the upper nut and the lower nut can be adjusted.

3. The friction stir welding device with a positioning platform according to claim 1, characterized in that: The positioning platform also includes two symmetrically arranged welding body fixing mechanisms, each of which includes a supporting platform with a rectangular parallelepiped structure and clamps fixedly arranged at four corners of the top plane of the supporting platform.

4. The friction stir welding device with a positioning platform according to claim 3, characterized in that: Each of the support platforms includes a front facade and a rear facade, the clamps protrude from the front facade or the rear facade of the support platform, a pillar that can be raised and lowered in the vertical direction is provided at a position corresponding to each of the clamps inside the support platform, the welding body is supported by four pillars and positioned by four clamps on the top plane of the support platform, and a spacing adjustment mechanism is also provided between the front facade and the rear facade of the support platform, so that the length of the welding body is positioned and clamped through the front facade and the rear facade of the support platform.

5. The friction stir welding device with a positioning platform according to claim 4, characterized in that: The clips on each of the front facades or rear facades are fixedly arranged on the front facades or rear facades through a width adjustment mechanism.

6. The friction stir welding device with a positioning platform according to claim 1, characterized in that: A panel is also arranged around the periphery of the main support frame, and the panel includes seven panel units composed of support rods and a fence. Several of the panel units are interconnected by the same support rod to form a quadrilateral panel space with three sides closed and one side open.

7. The friction stir welding device with a positioning platform according to claim 1, characterized in that: It also includes a control console arranged on a side of the positioning platform away from the welding structure, and the control console is provided with a remote control center and a plurality of emergency brake buttons.

8. The friction stir welding device with a positioning platform according to claim 1, characterized in that: A plurality of positioning plates are arranged on the main support frame, and the weld detection platform includes a sliding seat platform, a supporting structure and a detection platform in sequence from bottom to top in the vertical direction, the detection platform is fixed on the supporting structure, the supporting structure is fixed on the sliding seat platform, and the weld detection platform is slidably arranged on the plurality of positioning plates through the sliding seat platform.

9. The friction stir welding device with a positioning platform according to claim 8, characterized in that: The positioning platform also includes an auxiliary clamping mechanism, which is symmetrically provided with a plurality of positioning platforms that are respectively and detachably fixedly arranged on a plurality of positioning plates.

10. The friction stir welding device with a positioning platform according to claim 9, characterized in that: The auxiliary clamping mechanism includes an auxiliary support, two positioning holes are symmetrically arranged on the fixed platform of the auxiliary support, a lifting motor is fixedly arranged between the two positioning holes, a lifting platform is fixedly connected to the output shaft of the lifting motor, lifting guide rods are fixedly arranged on both sides of the lifting platform, and the two lifting guide rods are respectively slidably arranged through the two positioning holes. The lifting platform moves in a vertical direction relative to the fixed platform of the auxiliary support, and the welding body placed between the lifting platform and the fixed platform can be clamped and fixed.

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