阅读说明：本技术 一种浮动式激光焊接模具及基于其的激光焊接设备 (Floating laser welding mould and laser welding equipment based on same ) 是由 王学新 于 2020-06-12 设计创作，主要内容包括：本发明公开了一种浮动式激光焊接模具及基于其的激光焊接设备,焊接模具包括底座,底座上浮动连接有外壳,外壳内设圆柱状的空腔,底座内部转动设有主轴,主轴上端伸入至外壳的空腔内且固定套装有下模,下模与外壳的空腔内侧壁之间通过第一轴承实现转动连接,下模上方设有上模,上模外侧壁与外壳的空腔内侧壁之间通过第二轴承实现转动连接；上模内部型腔形成上模型腔,下模顶部型腔形成下模型腔,上模与下模的之间的缝隙为焊接缝隙,外壳一侧还开有供激光穿过的激光光源穿孔,激光光源穿孔正好与焊接缝隙相对应。本发明相比现有技术具有以下优点：从根本上保证了上模和下模的同心度,从而保证了产品的焊接精度。(The invention discloses a floating type laser welding die and laser welding equipment based on the same, wherein the welding die comprises a base, a shell is connected on the base in a floating manner, a cylindrical cavity is arranged in the shell, a main shaft is rotatably arranged in the base, the upper end of the main shaft extends into the cavity of the shell, a lower die is fixedly sleeved on the main shaft, the lower die is rotatably connected with the inner side wall of the cavity of the shell through a first bearing, an upper die is arranged above the lower die, and the outer side wall of the upper die is rotatably connected with the inner side wall of the cavity of the shell through a; the inner cavity of the upper die forms an upper die cavity, the top cavity of the lower die forms a lower die cavity, a gap between the upper die and the lower die is a welding gap, one side of the shell is also provided with a laser source through hole for laser to pass through, and the laser source through hole just corresponds to the welding gap. Compared with the prior art, the invention has the following advantages: the concentricity of the upper die and the lower die is fundamentally ensured, so that the welding precision of the product is ensured.)

1. The utility model provides a floating laser welding mould, includes the base, its characterized in that: the base is movably connected with a shell, a cylindrical cavity is arranged in the shell, a vertically extending main shaft is rotatably arranged in the base, the upper end of the main shaft extends into the cavity of the shell, a lower die is fixedly sleeved outside the lower die, a first bearing is fixedly sleeved outside the lower die, the outer side wall of the lower die is rotatably connected with the inner side wall of the cavity of the shell through the first bearing, the first bearing can slide along the inner side wall of the cavity of the shell, an upper die is arranged above the lower die, a second bearing is fixedly sleeved outside the upper die, the outer side wall of the upper die is rotatably connected with the inner side wall of the cavity of the shell through the second bearing, and the axial movement of the second bearing on the inner side wall of the cavity of the shell;

the laser welding device is characterized in that an upper die cavity is formed in the inner die cavity of the upper die, a lower die cavity is formed in the top of the lower die, a welding die cavity for placing the whole workpiece is formed by the upper die cavity and the lower die cavity together, a welding gap is formed between the upper die and the lower die, a laser light source perforation for laser to penetrate is further formed in one side of the shell, and the laser light source perforation is just corresponding to the welding gap.

2. A floating laser welding die as recited in claim 1, wherein: the outer side of the shell is provided with a circle of annular groove at a position close to the bottom, a plurality of floating blocks are uniformly distributed in the annular groove along the circumferential direction, the floating blocks are fixedly connected with the shell, a floating groove which is communicated up and down is formed in the middle of each floating block, a lower limiting step which protrudes inwards is arranged at the bottom of each floating groove, the fixing piece penetrates through the floating grooves from top to bottom and then is fixed on the base, an upper limiting step which protrudes outwards is arranged at the top of the fixing piece, floating gaps are reserved between the outer side wall of the upper limiting step and the inner side wall of the floating groove and between the bottom wall of the upper limiting step and the top wall of the lower limiting step, and the upper limiting step and the lower limiting step of the fixing piece are.

3. A floating laser welding die as recited in claim 2, wherein: the fixing piece is a fixing bolt, the bottom of the fixing bolt is screwed into the threaded hole of the base to achieve fixed connection, and the head of the fixing bolt serves as an upper limiting step.

4. A floating laser welding die as recited in claim 3, wherein: the fixing bolt is fixedly sleeved with a protective sleeve outside the part above the base, the shape of the protective sleeve is matched with that of the fixing bolt, and a floating gap is reserved between the protective sleeve and the floating groove.

5. A floating laser welding die as recited in claim 1, wherein: the floating block is provided with adjusting bolts on two sides of the floating groove respectively, the bottoms of the two adjusting bolts are screwed into threaded holes of the floating block, the tops of the two adjusting bolts are abutted against the top wall of the annular groove tightly, and the bottom of the floating block is abutted against the bottom wall of the annular groove tightly, so that the fixed connection between the floating block and the shell is realized.

6. A floating laser welding die as recited in claim 1, wherein: the limiting mechanism is arranged as follows: and a bearing limiting step for limiting the bottom of the second bearing is arranged on the inner side wall of the cavity of the shell, and a bearing pressing plate for pressing the top of the second bearing is arranged at the top of the shell.

7. A floating laser welding die as recited in claim 1, wherein: and a first upper limiting ring for limiting the top of the first bearing and a first lower limiting ring for limiting the bottom of the first bearing are arranged on the outer side of the lower die.

8. A floating laser welding die as recited in claim 1, wherein: and a second lower limiting ring for limiting the bottom of the second bearing and a second upper limiting ring for limiting the top of the second bearing are arranged on the outer side of the upper die.

9. A floating laser welding die as recited in claim 1, wherein: the shell one side still is equipped with the argon protection and supplies the mouth, the inner of argon protection supplies the mouth to stretch into in the shell cavity, the external argon gas source of trachea is passed through to argon protection supplies the mouth outer end.

10. The utility model provides a laser welding equipment, includes the frame, from last assembly, the welding mould and the lower assembly of pushing up that down has set gradually in the frame, its characterized in that: the welding die is a floating laser welding die as claimed in any one of claims 1 to 9, the base is fixed on a frame, and the main shaft extends downwards from the bottom of the base and is connected with a top rod at the top of a lower top assembly;

a laser welding device is also arranged on one side of the welding die on the rack, and a laser source welding head of the laser welding device is over against a laser source perforation of the floating type laser welding die;

the machine frame is also provided with a driving mechanism for driving the main shaft to rotate;

the pressure head through the upper pressure assembly pushes down the workpiece located in the welding cavity, the upper part and the lower part of the workpiece are in close contact and the bottom of the workpiece is abutted against the bottom of the lower die cavity, the pressure head of the upper pressure assembly continues to push down, the workpiece and the lower die are driven to synchronously move downwards, a joint between the upper part and the lower part of the workpiece is exposed, the main shaft is driven to rotate through the driving mechanism, the main shaft rotates to drive the lower die and the workpiece to rotate together, the laser welding device is started, a laser beam sent by the laser source welding head penetrates into a welding gap between the upper die and the lower die from a laser source perforation of the shell, the workpiece is matched to rotate, and therefore laser welding is carried out on one circle of the workpiece.

Technical Field

The invention relates to welding equipment, in particular to a floating type laser welding die and laser welding equipment based on the same.

Background

In the production and manufacturing process of products such as vacuum cups, vacuum kettles and the like, the welding of metal sheet materials is a difficult point. In the existing laser welding equipment, an upper die and a lower die of a welding die are respectively and independently installed on a rack, the upper die and the lower die are respectively and independently installed on the rack through a series of components by taking the rack as a reference, and various errors such as design gap errors, machining errors, installation errors and the like are accumulated among the components, so that the position deviation between the upper die and the lower die is large, the upper die and the lower die are not concentric, and finally the upper part and the lower part of a welding product are dislocated to form defective products. Especially for sheet metal materials, the welding precision requirement is high, and the existing laser welding equipment cannot meet the product precision requirement.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a floating type laser welding die and laser welding equipment based on the same, so that the concentricity of an upper die and a lower die is ensured, and the welding precision of a product is ensured.

The invention is realized by the following technical scheme:

a floating type laser welding die comprises a base, wherein a shell is connected to the base in a floating mode, a cylindrical cavity is formed in the shell, a vertically extending main shaft is rotatably arranged in the base, the upper end of the main shaft extends into the cavity of the shell, a lower die is fixedly sleeved with a lower die, a first bearing is fixedly sleeved outside the lower die, the outer side wall of the lower die is rotatably connected with the inner side wall of the cavity of the shell through the first bearing, the first bearing can slide along the inner side wall of the cavity of the shell, an upper die is arranged above the lower die, a second bearing is fixedly sleeved outside the upper die, the outer side wall of the upper die is rotatably connected with the inner side wall of the cavity of the shell through the second bearing, and the axial movement of the second bearing on the inner side wall of;

the laser welding device is characterized in that an upper die cavity is formed in the inner die cavity of the upper die, a lower die cavity is formed in the top of the lower die, a welding die cavity for placing the whole workpiece is formed by the upper die cavity and the lower die cavity together, a welding gap is formed between the upper die and the lower die, a laser light source perforation for laser to penetrate is further formed in one side of the shell, and the laser light source perforation is just corresponding to the welding gap.

Furthermore, a circle of annular groove is formed in the outer side of the shell at a position close to the bottom, a plurality of floating blocks are uniformly distributed in the annular groove along the circumferential direction, the floating blocks are fixedly connected with the shell, a floating groove which is communicated up and down is formed in the middle of each floating block, a lower limiting step which protrudes inwards is arranged at the bottom of each floating groove, the fixing piece penetrates through the floating grooves from top to bottom and then is fixed on the base, an upper limiting step which protrudes outwards is arranged at the top of the fixing piece, floating gaps are reserved between the outer side wall of the upper limiting step and the inner side wall of the floating groove and between the bottom wall of the upper limiting step and the top wall of the lower limiting step, and the upper limiting step of the fixing piece is matched with the lower limiting step to.

Furthermore, the fixing piece is a fixing bolt, the bottom of the fixing bolt is screwed into a threaded hole of the base to realize fixed connection, and the head of the fixing bolt is used as an upper limiting step.

Furthermore, a protective sleeve is fixedly sleeved outside the part of the fixing bolt above the base, the shape of the protective sleeve is matched with that of the fixing bolt, and a floating gap is reserved between the protective sleeve and the floating groove.

Furthermore, the two sides of the floating block, which are positioned in the floating groove, are respectively provided with an adjusting bolt, the bottoms of the two adjusting bolts are screwed into the threaded holes of the floating block, the tops of the two adjusting bolts are abutted against the top wall of the annular groove, and the bottom of the floating block is abutted against the bottom wall of the annular groove, so that the fixed connection between the floating block and the shell is realized.

Further, stop gear sets up to: and a bearing limiting step for limiting the bottom of the second bearing is arranged on the inner side wall of the cavity of the shell, and a bearing pressing plate for pressing the top of the second bearing is arranged at the top of the shell.

Furthermore, the lower die outer side is provided with a first upper limit ring for limiting the top of the first bearing and a first lower limit ring for limiting the bottom of the first bearing.

Furthermore, a second lower limiting ring for limiting the bottom of the second bearing and a second upper limiting ring for limiting the top of the second bearing are arranged on the outer side of the upper die.

Further, shell one side still is equipped with the argon protection and supplies the air cock, the inner of argon protection supplies the air cock stretches into in the shell cavity, the external argon gas source of trachea is passed through to argon protection supplies the air cock outer end.

A laser welding device comprises a rack, wherein an upper pressing assembly, a welding die and a lower jacking assembly are sequentially arranged on the rack from top to bottom, the welding die is the floating type laser welding die, a base is fixed on the rack, and a main shaft extends downwards from the bottom of the base and is connected with a jacking rod at the top of the lower jacking assembly;

a laser welding device is also arranged on one side of the welding die on the rack, and a laser source welding head of the laser welding device is over against a laser source perforation of the floating type laser welding die;

the machine frame is also provided with a driving mechanism for driving the main shaft to rotate;

the pressure head through the upper pressure assembly pushes down the workpiece located in the welding cavity, the upper part and the lower part of the workpiece are in close contact and the bottom of the workpiece is abutted against the bottom of the lower die cavity, the pressure head of the upper pressure assembly continues to push down, the workpiece and the lower die are driven to synchronously move downwards, a joint between the upper part and the lower part of the workpiece is exposed, the main shaft is driven to rotate through the driving mechanism, the main shaft rotates to drive the lower die and the workpiece to rotate together, the laser welding device is started, a laser beam sent by the laser source welding head penetrates into a welding gap between the upper die and the lower die from a laser source perforation of the shell, the workpiece is matched to rotate, and therefore laser welding is carried out on one circle of the workpiece.

Compared with the prior art, the invention has the following advantages:

1. according to the floating type laser welding die and the laser welding equipment based on the same, the upper die and the lower die of the welding die are respectively arranged in the inner cavity of the same shell through the bearings, and the shell is connected with the base in a floating mode, so that even if the main shaft deflects, the lower die arranged on the main shaft can deflect along with the main shaft, the lower die can drive the shell and the upper die in the shell to synchronously deflect, the concentricity of the upper die and the lower die is fundamentally ensured, the concentricity of the upper portion and the lower portion of a welding product is ensured, the welding precision and the welding quality of the product are ensured, and the qualification rate of the product is greatly improved.

2. According to the floating type laser welding die, the floating gap between the floating block fixed on the shell and the fixing piece fixed on the base is adopted, the floating connection between the shell and the base is realized, the floatability of the shell is ensured, and the upper and lower floating positions are limited by the matching of the upper limiting step and the lower limiting step.

Drawings

FIG. 1 is a perspective view of the inventive die.

Figure 2 is a perspective half-sectional view of the inventive die.

Fig. 3 is a front sectional view of the die of the present invention.

Fig. 4 is an enlarged view of fig. 3 at a.

Fig. 5 is an exploded view of the floating structure portion of the inventive die.

Fig. 6 is a front view of the laser welding apparatus of the present invention.

Fig. 7 is a side view of the laser welding apparatus of the present invention.

Fig. 8 is a schematic view of the structure of the cup of the present invention before welding.

Fig. 9 is a schematic view of the welded cup of the present invention.

Reference numbers in the figures: the device comprises a base, a shell, a spindle, a main shaft, a lower die, a first bearing, a first upper limit ring, a first lower limit ring, a 7 first lower limit ring, an upper die, a 9 second bearing, a bearing limit step, a 11 bearing pressing plate, a second lower limit ring, a 13 second upper limit ring, a 14 upper die cavity, a 15 lower die cavity, a 16 laser source through hole, a 17 annular groove, an 18 floating block, a 19 floating groove, a 20 adjusting bolt, a 21 fixing part, a 22 lower limit step, a 23 upper limit step, a 24 floating gap, a 25 protective sleeve, a 26 machine frame, a 27 upper pressure cylinder, a 28 pressure head, a 29 lower top cylinder, a 30 ejector rod, a 31 driving motor, a 32 driving belt wheel, a 33 driven belt wheel, a 34 cup body, a 35 cup bottom, a 36 cup body, a 37 welding die and a 38 argon protection.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

Referring to fig. 1 to 7, the floating laser welding mould that this embodiment provided, this welding mould 37 includes base 1, it is connected with shell 2 to float on the base 1, establish cylindric cavity in the shell 2, base 1 is inside to be rotated and to be provided with a vertical extension's main shaft 3, 3 upper ends of main shaft stretch into in the cavity of shell 2 and fix the cover through the screw and be equipped with lower mould 4, 4 outer fixed sleeves of lower mould are equipped with first bearing 5, realize rotating through first bearing 5 between 4 lateral walls of lower mould and the cavity inside wall of shell 2 and be connected, first bearing 5 can slide along the cavity inside wall of shell 2, the 4 outside of lower mould is equipped with carries out spacing first upper limit ring 6 to 5 tops of first bearing, and carry out spacing first spacing lower limit ring 7 to 5 bottoms of first bearing. In order to facilitate the installation of the first bearing 5, the lower die 4 is designed to be composed of an upper half part and a lower half part, the first upper limit ring 6 and the upper half part of the lower die 4 are integrally formed, the first lower limit ring 7 and the lower half part of the lower die 4 are integrally formed, and the upper half part and the lower half part are fixedly connected together through screws.

4 tops of lower mould are equipped with mould 8, go up 8 outer fixed sleeves of mould and are equipped with second bearing 9, go up and realize rotating through second bearing 9 between 8 lateral walls of mould and the cavity inside wall of shell 2 and be connected, carry on spacingly to the axial float of second bearing 9 on the cavity inside wall of shell 2 through stop gear, stop gear specifically sets up to: be equipped with on the cavity inside wall of shell 2 and carry out spacing bearing spacing step 10 to second bearing 9 bottom, 2 tops of shell are equipped with the bearing clamp plate 11 that compresses tightly 9 tops of second bearing, and bearing clamp plate 11 passes through screw and 2 fixed connection of shell. Go up the mould 8 outside and be equipped with and carry out spacing second lower spacing ring 12 to second bearing 9 bottom and go up spacing ring 13 to the second that carries out spacing second at second bearing 9 top, wherein the second is lower spacing ring 12 and last mould 8 integrated into one piece, and second is last spacing ring 13 through screw and last mould 8 fixed connection.

An upper die cavity 14 is formed in a cavity inside the upper die 8, a lower die cavity 15 is formed in a cavity at the top of the lower die 4, a welding cavity for placing the whole workpiece is formed by the upper die cavity 14 and the lower die cavity 15 together, a welding gap is formed between the upper die 8 and the lower die 4, a laser source through hole 16 for laser to pass through is formed in one side of the shell 2, and the laser source through hole 16 just corresponds to the welding gap.

Specifically, the floating structure between the housing 2 and the base 1 is: the outer side of the shell 2 is provided with a ring of annular grooves 17 at a position close to the bottom, a plurality of floating blocks 18 are uniformly distributed in the annular grooves 17 along the circumferential direction, the floating blocks 18 are respectively provided with adjusting bolts 20 at two sides of a floating groove 19, the bottoms of the two adjusting bolts 20 are screwed into threaded holes of the floating blocks 18, the tops of the two adjusting bolts 20 are abutted against the top wall of the annular grooves 17, and the bottoms of the floating blocks 18 are abutted against the bottom wall of the annular grooves 17, so that the fixed connection between the floating blocks 18 and the shell 2 is realized. The middle part of the floating block 18 is provided with a floating groove 19 which is through up and down, the bottom of the floating groove 19 is provided with a lower limiting step 22 which protrudes inwards, the fixing part 21 penetrates through the floating groove 19 from top to bottom and then is fixed on the base 1, the top of the fixing part 21 is provided with an upper limiting step 23 which protrudes outwards, a floating gap 24 is reserved between the outer side wall of the upper limiting step 23 and the inner side wall of the floating groove 19 and between the bottom wall of the upper limiting step 23 and the top wall of the lower limiting step 22, and the upper limiting step 23 and the lower limiting step 22 of the fixing part 21 are matched to limit the upper limiting position of the floating block 18.

In this embodiment, the fixing member 21 is a fixing bolt, the bottom of the fixing bolt is screwed into the threaded hole of the base 1 to realize fixed connection, and the head of the fixing bolt is used as the upper limiting step 23. The fixed bolt is fixedly sleeved with a protective sleeve 25 at the position above the base 1, the shape of the protective sleeve 25 is matched with that of the fixed bolt, and a floating gap 24 is reserved between the protective sleeve 25 and the floating groove 19. The provision of the protective sleeve 25 provides for accurate positioning and effective reduction of friction between the anchor stud and the slider 18.

2 one side of shell still is equipped with argon protection air feed mouth 38, and argon protection air feed mouth 38 the inner stretches into in the 2 cavities of shell, and the external argon gas source of trachea is passed through to argon protection air feed mouth 38 outer end, lets in argon gas through argon protection air feed mouth 38 to 2 inside cavities of shell, makes in the 2 inside inclosed cavities of shell, and the argon gas can carry out 360 all-round protections to the welding work piece, effectively prevents the oxidation of work piece welding position to welding quality has been improved.

The embodiment also provides a laser welding device, which comprises a machine frame 26, wherein an upper pressing assembly, a welding die 37 and a lower ejection assembly are sequentially arranged on the machine frame 26 from top to bottom.

The upper pressing assembly comprises an upper pressing cylinder 27 mounted on the frame 26, a piston rod of the upper pressing cylinder 27 extends downwards and is connected with a pressing head 28, and the pressing head 28 and the piston rod of the upper pressing cylinder 27 are rotatably connected through a bearing.

The welding die 37 is a floating laser welding die 37 as above, the base 1 is fixed on the frame 26, and the main shaft 3 extends downwards from the bottom of the base 1 and is connected with the ejector rod 30 at the top of the lower ejection assembly.

The lower top assembly is arranged on a lower top cylinder 29 on the frame 26, a piston rod of the lower top cylinder 29 extends upwards and is rotatably connected with a top rod 30 through a bearing, and the top end of the top rod 30 is in threaded connection with the bottom end of the main shaft 3.

A laser welding device (not shown) is provided on the frame 26 on the side of the welding die 37, and a laser source welding head of the laser welding device faces the laser source through hole 16 of the floating type laser welding die 37.

The frame 26 is also provided with a driving mechanism for driving the main shaft 3 to rotate; the driving mechanism comprises a driving motor 31, a driving pulley 32, a driven pulley 33 and a conveyor belt for connecting the driving pulley 32 and the driven pulley 33, the driving pulley 32 is installed on an output shaft of the driving motor 31, the driven pulley 33 is fixed with the spindle 3, and the spindle 3 is driven to rotate through the driving motor 31.

The operation of this embodiment will be described below by taking the welding of the cup 36 as an example:

referring to fig. 8 and 9, the cup body 36 is composed of a cup body 34 and a cup bottom 35 which are butted up and down.

When the cup bottom mould works, the cup bottom 35 is firstly placed in the lower mould cavity 15, then the cup body 34 is placed in the upper mould cavity 14, and at the moment, the cup body 34 is vertically butted with the cup bottom 35 to finish the workpiece loading. Then the pressing assembly moves upwards, the pressing head 28 moves downwards, the cup body 34 is pressed downwards, the cup body 34 and the cup bottom 35 are abutted against the lower die 4, the pressing head 28 of the pressing assembly continues to press downwards, the cup body 34, the cup bottom 35 and the lower die 4 are driven to synchronously move downwards for a certain distance, and therefore the joint between the two parts of the cup body 34 and the cup bottom 35 is exposed, and subsequent laser welding is facilitated. Then, argon gas is introduced into the cavity of the shell 2 through the argon gas protection gas supply nozzle 38, the main shaft 3 is driven to rotate through the driving mechanism, the main shaft 3 rotates to drive the lower die 4 and the workpiece to rotate together, the laser welding device is started, a laser beam emitted by a laser source welding head penetrates into a welding gap between the upper die 8 and the lower die 4 from a laser source perforation 16 of the shell 2, and the rotation of the workpiece is matched, so that the laser welding is carried out on one circle of the workpiece. After welding, the laser welding device is closed, the driving mechanism is closed, the main shaft 3 stops rotating, the upper pressure assembly returns, the lower ejection assembly acts, and the ejector rod 30 ejects a workpiece, so that the complete welding process of one workpiece is completed.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.