CN114273848B

CN114273848B - Hydraulic cylinder outer tube cylinder centre gripping frock clamp

Info

Publication number: CN114273848B
Application number: CN202210200883.5A
Authority: CN
Inventors: 李雪梅
Original assignee: Xuzhou Naikedun Machinery Manufacture Co ltd
Current assignee: Xuzhou Haohe Intelligent Equipment Co ltd
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2022-05-13
Anticipated expiration: 2042-03-03
Also published as: CN114273848A

Abstract

The invention relates to the technical field of welding tool fixtures, and particularly provides a clamping tool fixture for a cylinder barrel of an outer pipe of a hydraulic cylinder, which comprises a workbench, a rotary fixture table assembled on the workbench, and a pipe orifice positioning fixture assembled on the workbench; the rotary fixture table comprises a rotary table mechanism assembled on the workbench, the rotary table mechanism comprises a rotary platform which is vertically and rotatably installed, a synchronous positioning fixture for axially aligning the cylinder barrel part and the flange plate is arranged on the rotary platform, and a pressing mechanism for pressing the cylinder barrel part and the flange plate is arranged on the upper end surface of the rotary platform; the tool clamp provided by the invention can be used as a hydraulic cylinder welding positioning clamp, can replace manual work to realize rapid automatic alignment of a welding part, and solves the problems of manual adjustment trouble and uncontrollable error and unreliable precision in the manual adjustment process.

Description

Hydraulic cylinder outer tube cylinder centre gripping frock clamp

Technical Field

The invention relates to the technical field of welding tool fixtures, and particularly provides a clamping tool fixture for a cylinder barrel of an outer pipe of a hydraulic cylinder.

Background

The hydraulic cylinder is also called as a hydraulic cylinder, and is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion or swinging motion; the hydraulic cylinder consists of a cylinder barrel, a cylinder cover, a piston rod, a sealing device, a buffering device and an exhaust device.

The outer pipe cylinder barrel of the hydraulic oil cylinder is a metal shell which is positioned on the outermost layer of the hydraulic oil cylinder and is of a pipe barrel structure, the structures of the outer pipe cylinder barrels of the hydraulic oil cylinder are different according to different structural designs, as shown in figure 11, the outer pipe cylinder barrel of the hydraulic oil cylinder is of a cylinder barrel structure which has the characteristics shown in the figure and is different only in diameter or length, the cylinder barrel body consists of a cylinder barrel part, a flange plate positioned at one end of the cylinder barrel part and two pipe orifices positioned on the side wall of the cylinder barrel part, the flange plate is used for fixedly installing the hydraulic oil cylinder, and the two pipe orifices are inlet and outlet connecting ports of two hydraulic pipes in the hydraulic oil cylinder in a hydraulic system; carry out the contour machining to the cylinder of this type of structure and add, ring flange and two mouths of pipe are the independent structure, need carry out the welding process shaping through the cylinder barrel portion of welded mode and drum structure, add at actual welding, accomplish through manual welding mostly, nevertheless have following drawback when passing through manual welding: 1. the hydraulic cylinder is a precise device and needs high assembly precision, so the welding precision needs to be considered during welding, especially the axial alignment of the flange and the cylinder barrel is needed for butt welding of the flange and the end of the cylinder barrel, the manual arrangement and adjustment is usually carried out during manual welding, but the manual adjustment precision is unreliable, the error is uncontrollable, and the flange and the cylinder barrel are not usually aligned and pressed during welding, so the deviation is easily caused during welding, and the welding thermal deformation of materials at the welding interface position cannot be inhibited.

2. When the nozzles are welded, the two nozzles are welded on the arc side wall of the cylinder barrel part, so that the welding positioning of the nozzles is troublesome, and the nozzles need to be manually adjusted one by one and aligned with the welding positions.

Disclosure of Invention

In order to solve the problems, the invention provides a clamping tool fixture for a cylinder barrel of an outer pipe of a hydraulic cylinder, which is used for solving the problems in the background art.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: a clamping tool fixture for a cylinder barrel of an outer pipe of a hydraulic oil cylinder comprises a workbench, a rotary fixture table assembled on the workbench and a pipe orifice positioning fixture assembled on the workbench; wherein: the rotary fixture table comprises a rotary table mechanism assembled on the workbench, the rotary table mechanism comprises a rotary platform vertically installed in a rotating mode, a synchronous positioning fixture used for axially aligning the cylinder barrel part and the flange plate is arranged on the rotary platform, and a pressing mechanism used for pressing the cylinder barrel part and the flange plate is arranged on the upper end face of the rotary platform.

The pipe orifice positioning fixture comprises two lifting seats which are vertically distributed and independently lift and install, wherein each lifting seat is vertically provided with a pre-storage box and a horizontal mounting alignment clamping cylinder on the upper end surface of the lifting seat, the pre-storage box is of a square cylindrical structure with an upper opening and a lower opening, the output direction of the alignment clamping cylinder is arranged along the rotation radial direction of the rotation platform, the alignment clamping cylinder and the pre-storage box are arranged relatively to the rotation center of the rotation platform from far to near, the output end of the alignment clamping cylinder is fixedly connected with a positioning inner supporting block, the positioning inner supporting block is of a rotation symmetrical structure, the central shaft of the positioning inner supporting block coincides with the output shaft of the alignment clamping cylinder, and a position avoiding gap for avoiding the positioning inner supporting block is arranged on two side surfaces facing the output direction of the alignment clamping cylinder on the pre-storage box, the avoiding gap is rectangular and is formed from the lower end of the pre-storage box, and the left side and the right side of the avoiding gap are flush with the inner side wall of the pre-storage box; the positioning inner supporting block sequentially comprises a section of circular table portion, a cylindrical portion, a second section of circular table portion and a cylindrical rod from left to right, the small circular bottom surface of the section of circular table portion is connected with the output end of the alignment clamping cylinder, the diameter of the small circular bottom surface of the section of circular table portion is at most equal to the diameter of the output end of the alignment clamping cylinder, two end surfaces of the cylindrical portion are respectively coplanar with the large circular bottom surface of the section of circular table portion and the large circular bottom surface of the second section of circular table portion, and the diameter of the cylindrical rod is equal to the diameter of the small circular bottom surface of the second section of circular table portion; when the extension amount of the output end of the alignment clamping cylinder is zero, the positioning inner supporting block is positioned between the alignment clamping cylinder and the pre-storage box.

Preferably, the revolving platform mechanism further comprises a revolving support frame and a revolving driving motor; the rotary table is characterized in that the rotary support frame is fixedly installed at the bottom end of the table top of the working table, the rotary platform comprises a rotary drum with a closed bottom end and a circular table top fixed at the top end of the rotary drum, the rotary drum penetrates through the table top of the working table and is vertically and rotatably installed on the rotary support frame through a bearing, the rotary driving motor is fixedly installed on the rotary support frame through a motor fixing plate, a driving bevel gear is arranged on an output shaft of the rotary driving motor, and a bevel gear ring meshed with the driving bevel gear is fixedly installed on the rotary drum.

Preferably, the synchronous positioning fixture comprises an internal clamping driving cylinder, four connecting rods and four internal supporting clamping components, wherein the internal clamping driving cylinder, the four connecting rods and the four internal supporting clamping components are vertically and fixedly arranged on the bottom end face of the rotary drum; a square avoidance hole is formed in the center of the circular table top, sliding rails are correspondingly arranged on the circular table top at the four side line positions of the avoidance hole, the four sliding rails are uniformly distributed around the circumference of the central shaft of the circular table top, the guiding direction of the sliding rails is arranged along the radial direction of the circular table top, and four avoidance openings corresponding to the four sliding rails one by one are formed in the top end of the rotary drum; the four internal stay clamping components are installed in one-to-one sliding fit with the four sliding rails, one end of each connecting rod is hinged to the output end of the internal clamp driving cylinder, and the other end of each connecting rod is hinged to the four internal stay clamping components in one-to-one correspondence.

Preferably, the inner support clamping component comprises a vertical rod, a matching sliding block positioned on the side wall of the vertical rod, a roller frame positioned at the top end of the vertical rod and two inner support rollers vertically and rotatably mounted on the roller frame; the vertical rod is hinged to one end of the connecting rod, the matching sliding block is in sliding fit with the sliding rail, and the two inner supporting rollers are symmetrically arranged in the radial direction of the circular table top.

Preferably, the pipe orifice positioning fixture further comprises two lifting guide frames and two adjusting screw rods; the lifting guide frames comprise vertical guide rails fixedly arranged on the table top of the workbench and a top plate horizontally fixed at the top ends of the vertical guide rails, the two adjusting screw rods and the two lifting guide frames are arranged in a one-to-one correspondence manner, and the adjusting screw rods are vertically and rotatably arranged between the table top of the workbench and the top plate; the two lifting seats are slidably mounted on the two vertical guide rails, the lifting seats are in threaded connection with one of the adjusting lead screws and are penetrated by the other adjusting lead screw, and the two lifting seats are in threaded connection with different adjusting lead screws.

Preferably, hold-down mechanism includes two vertical fixed mounting and is in table surface border position and about the stand that table surface diameter symmetry set up, vertical downwardly extending's opening guide rail is seted up from the top on the stand, two correspond on the stand and install the lift cylinder, two vertical sliding fit installs the pressure and rise board between the opening guide rail, the pressure and rise board with two the output fixed connection of lift cylinder.

Preferably, a U-shaped notch is formed in the middle of the lifting pressure plate, the opening direction of the U-shaped notch faces the pipe orifice positioning fixture, a pipe orifice inner support mechanism is further assembled on the lifting pressure plate, the pipe orifice inner support mechanism comprises two lifting cylinders vertically and fixedly mounted on the bottom end surface of the lifting pressure plate, a bridging top plate is horizontally and fixedly mounted between the output ends of the two lifting cylinders, a vertically-guided adjusting guide rail is fixedly mounted on the bottom end surface of the bridging top plate, two sliding blocks are slidably and adjustably mounted on the adjusting guide rail, an inner support assembly is correspondingly arranged on each sliding block, an inner extension driving assembly is further arranged on the bridging top plate, and the adjusting guide rail is closer to the pipe orifice positioning fixture relative to the inner extension driving assembly; the inner supporting component comprises a guide rod which is horizontally arranged on the sliding block in a sliding manner, the axial direction of the guide rod points to the central shaft of the rotary drum and is opposite to the pipe orifice positioning fixture, an end head disc is arranged at the end part of the guide rod facing the pipe orifice positioning fixture, a return spring is sleeved on the guide rod, two ends of the return spring are respectively fixed on the sliding block and the end head disc, a plurality of elastic inner supporting claws are uniformly distributed on the end head disc around the circumference of the central shaft of the guide rod, and the front ends of the elastic inner supporting claws are bent towards the direction of the central shaft of the guide rod; the inward extending driving assembly comprises a driving cylinder fixedly mounted at the top end of the bridging top plate, a guide plate vertically fixed at the output end of the driving cylinder and two wedge blocks slidably and adjustably mounted on the guide plate; the two wedge blocks and the two inner support assemblies are arranged in one-to-one correspondence, and the wedge blocks push against the guide rods through the inclined surfaces of the wedge blocks to drive the guide rods to slide.

Preferably, a clamping convex strip which extends vertically downwards is arranged on the pre-storage box in the middle on the inner wall of the side plate facing the rotary platform.

Preferably, the bottom end of the adjusting screw rod is provided with a hand wheel.

The technical scheme has the following advantages or beneficial effects: 1. the invention provides a clamping tool fixture for a cylinder barrel of an outer pipe of a hydraulic cylinder, which can replace manual adjustment in the welding process of a flange plate and a cylinder barrel part through a synchronous positioning fixture, can quickly realize axial automatic overlapping alignment of the flange plate and the cylinder barrel part, and ensures the welding precision and quality; the pressing mechanism can be used for pressing the flange plate after the flange plate and the cylinder barrel part are axially aligned, so that the flange plate and the cylinder barrel part can form the same rotating whole to realize integral rotation, meanwhile, the welding contact position keeps close contact through pressing, the insufficient welding is avoided, and the thermal deformation of the welding position in the welding process can be effectively inhibited; the arranged rotary table mechanism can drive the flange plate and the cylinder barrel part to synchronously rotate along with the flange plate and the cylinder barrel part, so that the rotary welding can be conveniently completed by matching with the conventional automatic welding device; the welding, alignment and clamping of the pipe orifices can be carried out on the hydraulic cylinder barrels with different length sizes through the arranged pipe orifice positioning clamp, the trouble of manual one-by-one alignment is avoided, and batch and continuous clamping and positioning operation can be realized by matching with a welding process; in conclusion, the tool clamp provided by the invention can be used as a welding positioning clamp of a hydraulic cylinder barrel, can replace manual work to realize rapid automatic alignment of a welding part, and solves the problems of trouble of manual adjustment and uncontrollable error and unreliable precision in the manual adjustment process.

2. The invention provides a clamping tool fixture for a cylinder barrel of an outer pipe of a hydraulic cylinder, wherein in a synchronous positioning fixture, an inner support roller is adopted as a direct contact component in an inner support clamping component, on one hand, the axial alignment of a flange plate and an inner support of a cylinder barrel part is not influenced, and meanwhile, the auxiliary inner support rolling can be realized when the integral rotation and alignment adjustment of the cylinder barrel part and the flange plate is carried out, so that the adjustment resistance is reduced.

3. The invention provides a clamping tool fixture for a cylinder barrel of an outer pipe of a hydraulic oil cylinder, in a pipe orifice positioning fixture, although the outline structural design of a positioning inner supporting block is simple, the pipe orifice can be pushed, positioned and clamped, the positioning inner supporting block cannot be interfered by movement in the process of reciprocating through an avoiding notch, and pipe orifice pieces can be pushed and blanked one by one.

Drawings

The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The drawings, in which like numerals refer to like parts throughout the several views and which are not necessarily drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic perspective view of a clamping fixture for a cylinder barrel of an outer pipe of a hydraulic cylinder provided by the invention at a viewing angle.

Fig. 2 is a schematic perspective view of a clamping fixture for a cylinder barrel of an outer pipe of a hydraulic cylinder at another viewing angle.

FIG. 3 is a front view of a clamping fixture for a cylinder barrel of an outer pipe of a hydraulic cylinder provided by the invention.

FIG. 4 is a side view of a clamping tooling fixture for a cylinder barrel of an outer pipe of a hydraulic cylinder provided by the invention.

Fig. 5 is a partially enlarged schematic view at a in fig. 2.

Fig. 6 is a schematic perspective view of the assembly structure of the lifting seat, the alignment clamping cylinder and the positioning inner supporting block.

Fig. 7 is a schematic perspective view of an assembly structure of the rotary platform and the synchronous positioning fixture.

FIG. 8 is a schematic diagram of a half-section structure of an assembly structure of the rotary platform and the synchronous positioning fixture.

Fig. 9 is a schematic perspective view of the nozzle inner support mechanism assembled on the pressure rising and reducing plate.

Fig. 10 is a structural schematic diagram of the assembly of the inner support component and the sliding block.

Fig. 11 is a schematic view of the product structure of the cylinder tube of the hydraulic cylinder.

In the figure: 1. a work table; 2. a rotary jig table; 21. a turntable mechanism; 211. a rotating support frame; 212. a rotary drive motor; 2121. a drive bevel gear; 213. a rotating platform; 2131. a rotating drum; 2132. a circular table top; 2133. a bevel gear ring; 2134. an avoiding opening; 2135. avoiding holes; 2136. a slide rail; 22. synchronously positioning the clamp; 221. an internal clamp driving cylinder; 222. a connecting rod; 223. an inner support clamping member; 2231. a vertical rod; 2232. matching with the sliding block; 2233. a roller frame; 2234. an inner support roller; 23. a hold-down mechanism; 231. a column; 2311. an open guide rail; 232. a lifting cylinder; 233. a voltage rising and falling plate; 2331. a U-shaped notch; 24. a pipe orifice inner supporting mechanism; 241. a lifting cylinder; 242. a bridging top plate; 243. adjusting the guide rail; 244. a slider; 245. an inner support assembly; 2451. a guide bar; 2452. a head plate; 2453. a return spring; 2454. an elastic inner supporting claw; 246. an inwardly extending drive assembly; 2461. a driving cylinder; 2462. a guide plate; 2463. wedge blocks; 3. a pipe orifice positioning clamp; 31. a lifting guide frame; 311. a vertical guide rail; 312. a top plate; 32. adjusting the lead screw; 321. a hand wheel; 33. a lifting seat; 34. pre-storing the box; 341. clamping convex strips; 342. avoiding gaps; 35. aligning and clamping the air cylinder; 36. positioning the inner supporting block; 361. a segment of a circular table portion; 362. a cylindrical portion; 363. a two-section circular table part; 364. a cylindrical rod; 4. a hydraulic cylinder barrel; 41. a cylinder barrel portion; 42. a flange plate; 43. a nozzle.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for the purpose of providing those skilled in the art with a more complete, accurate and thorough understanding of the concept and technical solution of the present invention, and to facilitate the implementation thereof, but not to limit the present invention.

As shown in figure 1, the clamping tool fixture for the outer pipe and the cylinder barrel of the hydraulic oil cylinder comprises a workbench 1, a rotary fixture table 2 assembled on the workbench 1 and a pipe orifice positioning fixture 3 assembled on the workbench 1.

As shown in fig. 1, 3 and 11, the rotary jig table 2 includes a rotary table mechanism 21 mounted on the table 1, the rotary table mechanism 21 includes a rotary platform 213 vertically rotatably mounted, a synchronous positioning jig 22 for axially aligning the cylinder tube 41 and the flange 42 is provided on the rotary platform 213, and a pressing mechanism 23 for pressing the cylinder tube 41 and the flange 42 is provided on an upper end surface of the rotary platform 213.

As shown in fig. 4, 7 and 8, the turntable mechanism 21 further includes a rotation support frame 211 and a rotation driving motor 212; the rotary supporting frame 211 is welded at the bottom end of the table top of the workbench 1, the rotary platform 213 comprises a rotary drum 2131 with a closed bottom end and a circular table 2132 welded at the top end of the rotary drum 2131, the rotary drum 2131 penetrates through the table top of the workbench 1 and is vertically and rotatably installed on the rotary supporting frame 211 through a bearing, the rotary driving motor 212 is fixedly installed on the rotary supporting frame 211 through a motor fixing plate, a driving bevel gear 2121 is arranged on an output shaft of the rotary driving motor 212, and a bevel gear ring 2133 meshed with the driving bevel gear 2121 is fixedly installed on the rotary drum 2131.

The rotary table mechanism 21 can drive the synchronous positioning fixture 22 and the pressing mechanism 23 to synchronously rotate along with the rotary platform 213, and the synchronous positioning fixture 22 and the pressing mechanism 23 are both assembled on the rotary platform 213, so that the synchronous positioning fixture 22 and the pressing mechanism 23 form a same rotary integral structure with the rotary platform 213, and the rotary drive motor 212 is started to drive the drive bevel gear 2121 to rotate, so that the drive bevel gear 2121 drives the rotary platform 213 to rotate on the rotary support frame 211 through the drive bevel gear ring 2133, and the rotary integral structure is rotated.

As shown in fig. 7 and 8, the synchronous positioning jig 22 includes a clamping driving cylinder 221, four connecting rods 222 and four inner support clamping parts 223 vertically and fixedly mounted in the bottom end face of the drum 2131 by screws; a square avoidance hole 2135 is formed in the center of the round table surface 2132, sliding rails 2136 are correspondingly arranged on the round table surface 2132 at four sideline positions of the avoidance hole 2135, the four sliding rails 2136 are uniformly distributed around the circumference of a central shaft of the round table surface 2132, the guiding direction of the sliding rails 2136 is arranged along the radial direction of the round table surface 2132, and four avoidance openings 2134 which correspond to the four sliding rails 2136 one to one are formed in the top end of the rotary drum 2131; the four inner support clamping components 223 and the four sliding rails 2136 are installed in a one-to-one corresponding sliding fit manner, one ends of the four connecting rods 222 are hinged with the output end of the inner clamp driving cylinder 221, and the other ends of the four connecting rods 222 are hinged with the four inner support clamping components 223 in a one-to-one corresponding manner; the inner supporting clamping component 223 comprises a vertical rod 2231, a matching slide block 2232 arranged on the side wall of the vertical rod 2231, a roller frame 2233 arranged at the top end of the vertical rod 2231 and two inner supporting rollers 2234 vertically and rotatably arranged on the roller frame 2233; the vertical rod 2231 is hinged with one end of the connecting rod 222, the matching slide block 2232 is in sliding fit with the slide rail 2136, and the two internal support rollers 2234 are arranged symmetrically in the radial direction of the round table surface 2132.

The synchronous positioning fixture 22 is used for automatically aligning and positioning the flange 42 and the cylinder barrel portion 41 in the axial direction, and it should be noted that the automatic synchronous positioning can be realized on the premise that the inner diameter of the flange 42 is equal to the inner diameter of the cylinder barrel portion 41; specifically, when the axial automatic alignment positioning is performed, the flange 42 is placed on the circular table surface 2132, so that the four inner support clamping components 223 are positioned in the circular holes of the flange 42, then the end to be welded of the cylinder barrel part 41 is vertically placed downwards on the end surface of the flange 42, similarly, the four inner support clamping components 223 are positioned in the barrel cavity of the cylinder barrel part 41, then the inner clamp driving cylinder 221 is started to enable the output end of the inner clamp driving cylinder to extend upwards, so that the four inner support clamping components 223 are correspondingly pushed to slide along the slide rail 2136 in a one-to-one manner towards the direction away from the center of the circular table surface 2132 through the four connecting rods 222, then the four groups of inner support rollers 2234 synchronously realize the inner support clamping contact between the inner wall of the flange 42 and the inner wall of the cylinder barrel part 41, and accordingly the flange 42 and the cylinder barrel part 41 are forced to achieve the axial automatic alignment positioning in the synchronous inner support clamping state; the synchronous positioning fixture 22 can replace manual work to automatically complete the axial alignment and positioning of the flange 42 and the cylinder barrel part 41, and can stably maintain the axial alignment state in the welding process, thereby avoiding the deviation of welding.

As shown in fig. 1, the pressing mechanism 23 includes two upright posts 231 vertically welded at the edge of the circular table 2132 and symmetrically arranged with respect to the diameter of the circular table 2132, an opening guide rail 2311 vertically extending downward is provided on the upright post 231 from the top end, the two upright posts 231 are correspondingly provided with the lifting cylinder 232, the lifting plate 233 is vertically installed between the two opening guide rails 2311 in a sliding fit manner, and the lifting plate 233 is fixedly connected with the output ends of the two lifting cylinders 232.

After the synchronous positioning fixture 22 completes the axial alignment positioning, the pressing mechanism 23 may be started to press the top of the cylinder barrel 41, specifically, the two lifting cylinders 232 are started synchronously to drive the lifting and dropping plates 233 to stably drop along the two opening guide rails 2311, so that the lifting and dropping plates 233 are pressed on the top end of the cylinder barrel 41; the pressing mechanism 23 is provided to press the top end of the cylinder tube 41 to clamp the cylinder tube 41 and the flange 42 between the circular table 2132 and the lifting pressing plate 233, so that the flange 42 and the cylinder tube 41 can rotate synchronously with the rotary platform 213 as a whole under the driving of the rotary table mechanism 21, and the welding contact position between the cylinder tube 41 and the flange 42 can be kept in close contact by pressing, so that false welding is avoided, and thermal deformation of the welding position in the welding process can be effectively inhibited.

The rotary fixture table 2 in the tool fixture provided by the invention can be matched with a welding robot to realize automatic welding, and particularly, during welding, the rotary table mechanism 21 drives the flange plate 42 and the cylinder barrel part 41 to synchronously rotate at a constant speed, so that the welding positions of the flange plate and the cylinder barrel part can be subjected to rotary welding.

As shown in fig. 2, 4, 5 and 6, the pipe orifice positioning fixture 3 includes two vertically distributed lifting seats 33 installed independently, the upper end surface of each lifting seat 33 is vertically installed with a pre-storage tank 34 and a horizontally installed alignment clamping cylinder 35, the pre-storage tank 34 is a square cylinder structure with an open upper end and a lower end, the output direction of the alignment clamping cylinder 35 is arranged along the rotation diameter direction of the rotation platform 213, the alignment clamping cylinder 35 and the pre-storage tank 34 are distributed from far to near relative to the rotation center of the rotation platform 213, the output end of the alignment clamping cylinder 35 is connected with a positioning inner supporting block 36 through a screw thread, the positioning inner supporting block 36 is a rotation symmetrical structure, the central axis of the positioning inner supporting block 36 coincides with the output axis of the alignment clamping cylinder 35, two side surfaces of the pre-storage tank 34 facing the output direction of the alignment clamping cylinder 35 are provided with clearance gaps 342 for avoiding the positioning inner supporting block 36, the avoiding gap 342 is rectangular and is formed from the lower end of the pre-storage box 34, the left side and the right side of the avoiding gap 342 are flush with the inner side wall of the pre-storage box 34, so that interference caused when the pipe orifice piece passes through the avoiding gap 342 is avoided, and it needs to be noted that the height of the avoiding gap 342 is between one time and two times of the diameter of the pipe orifice piece; a clamping convex strip 341 extending vertically downwards is arranged on the middle of the inner wall of the side plate facing the rotary platform 213 on the pre-storage box 34, the positioning inner supporting block 36 is sequentially provided with a section of circular table portion 361, a cylindrical portion 362, a section of circular table portion 363 and a cylindrical rod 364 from left to right, the small circular bottom surface of the section of circular table portion 361 is connected with the output end of the alignment clamping cylinder 35, the diameter of the small circular bottom surface of the section of circular table portion 361 is equal to the diameter of the output end of the alignment clamping cylinder 35, two end surfaces of the cylindrical portion 362 are respectively flush with the large circular bottom surface of the section of circular table portion 361 and the large circular bottom surface of the section of circular table portion 363, and the diameter of the cylindrical rod 364 is equal to the diameter of the small circular bottom surface of the section of circular table portion 363; when the elongation of the output end of the alignment clamping cylinder 35 is zero, the positioning inner support block 36 is located between the alignment clamping cylinder 35 and the pre-storage box 34. The pipe orifice positioning fixture 3 further comprises two lifting guide frames 31 and two adjusting screw rods 32; the lifting guide frame 31 comprises a vertical guide rail 311 welded on the table top of the workbench 1 and a top plate 312 horizontally welded on the top end of the vertical guide rail 311, two adjusting screw rods 32 are installed in one-to-one correspondence with the two lifting guide frames 31, the adjusting screw rods 32 are vertically and rotatably installed between the table top of the workbench 1 and the top plate 312, and the bottom ends of the adjusting screw rods 32 are provided with hand wheels 321; two lift seats 33 slidable mounting are on two vertical guide rails 311, lift seat 33 and one of them regulation lead screw 32 threaded connection, and are run through by another regulation lead screw 32, two lift seats 33 and the regulation lead screw 32 threaded connection of difference.

The pipe orifice positioning fixture 3 is used for welding and positioning two pipe orifice pieces and the cylinder barrel part 41 during welding, in the pipe orifice positioning fixture 3, the pre-storage box 34 is installed to correspond to the size of a pipe orifice 43 in a cylinder barrel to be welded, namely, a plurality of pipe orifice pieces can be pre-placed in the pre-storage box 34, so that the batch and continuous positioning welding operation is convenient to realize, the left and right width of the pre-storage box 34 is slightly larger than the diameter of the pipe orifice piece to be welded, the front and back width of the pre-storage box 34 is slightly larger than the length of the pipe orifice piece to be welded, in addition, the welding part of the pipe orifice piece and the cylinder barrel 41 is in a meshing shape, so the welding port of the pipe orifice piece needs to be pre-machined with an arc-shaped groove, and the pipe orifice piece pre-placed in the pre-storage box 34 during actual welding is always in a way that the groove end faces the cylinder barrel part 41, so that a clamping convex strip 341 is arranged as an anti-reverse structure, so that a plurality of pipe orifice pieces can be placed in the pre-storage box 34 only by being stacked and placed according to the groove end alignment clamping convex strips 341; for different sizes of pipe fittings, pre-existing tanks 34 of corresponding size can be exchanged, as can corresponding positioning inner spacers 36, if necessary.

After the tooling fixture provided by the invention finishes the alignment welding of the flange 42 and the cylinder barrel part 41 in advance, the alignment of the two pipe orifices 43 can be executed subsequently, the positions of the two pipe orifices 43 of the hydraulic cylinder barrels 4 with different lengths are different, so when the welding alignment is carried out on the cylinder barrel with specific length size, the height positions of the two positioning inner support blocks 36 need to be adjusted, specifically, after the welding of the flange 42 and the cylinder barrel part 41 is finished, the inner support of the synchronous positioning fixture 22 is kept clamped, but the pressing mechanism 23 is released, so that the integral structure formed by welding the flange 42 and the cylinder barrel 41 can rotate around the four groups of inner support rollers 2234, two pipe orifice holes pre-processed on the cylinder barrel part 41 are opposite to the two positioning inner support blocks 36 through rotation, then, the two hand wheels 321 are respectively rotated, so that the lifting seat 33 is driven to slide up and down along the vertical guide rail 311 through adjusting the screw 32, therefore, the height positions of the two positioning inner supporting blocks 36 are adjusted, the two positioning inner supporting blocks 36 are aligned to the two pipe orifice holes in the cylinder barrel part 41 one by one, and the welding positions of the two pipe orifices 43 of the hydraulic cylinder barrel 4 with the same size structure are determined, so that only one-time adjustment is needed to be completed in advance when the pipe orifices 43 of the hydraulic cylinder barrel 4 with the same size structure are welded and positioned, and only the cylinder barrel part 41 needs to be rotated to be in a correct position when the pipe orifices 43 of the hydraulic cylinder barrel 4 with the same size structure are welded and aligned each time; after the height adjustment is completed, a plurality of nozzle pieces can be stored in advance in the two pre-storage boxes 34 for continuous welding positioning processing.

When the pipe orifice is aligned, the alignment clamping cylinder 35 is started to drive the positioning inner supporting block 36 to move towards the direction of the pre-storage box 34, then the cylindrical rod 364 firstly enters the pipe hole of one pipe orifice positioned at the lowest part, the slope end of the pipe orifice continues to be in contact with the upper end face of the lifting seat 33 along with the continuous forward movement, the other end of the pipe orifice is in contact with the two-section circular platform part 363 and is slightly inclined and lifted, then the pipe orifice is pushed to start to move towards the direction close to the cylinder barrel part 41 through the contact of the two-section circular platform part 363, after the slope end is separated from being in contact with the lifting seat 33, the lower end of the pipe orifice loses support, therefore, under the inclined unbalanced state, the other end of the pipe orifice slides down along the two-section circular platform part 363, so that the pipe orifice slides down to the cylindrical rod to be in an axial horizontal state, and then the positioning inner supporting block 36 continues to move forwards along with the maintenance of the state 364, until the bevel end contacts with the side wall of the cylinder barrel part 41, the bevel end automatically adjusts and is occluded on the side wall of the cylinder barrel part 41 along with the continuous forward movement of the positioning inner supporting block 36, the two-section circular table part 363 is clamped at the other end of the pipe orifice piece, so that the welding position of the pipe orifice 43 and the cylinder barrel part 41 is tightly attached and the automatic alignment of the pipe orifice 43 and the pipe orifice hole is kept, then the pipe orifice 43 is welded under the state, after the welding is completed, the positioning inner supporting block 36 is drawn out from the welded pipe orifice piece, after the positioning inner supporting block 36 passes through the clearance notch 342, the pipe orifice piece in the pre-storage box 34 automatically falls, wherein the pipe orifice piece positioned at the lowest position falls on an output rod of the alignment clamping cylinder 35, and in the process that the positioning inner supporting block 36 is drawn out and retreated and passes through the clearance notch 342 again, the pipe orifice piece positioned at the lowest position moves up and down in the pre-storage box 34 along the outer edge contour of the positioning inner supporting block 36 and finally falls on the lifting seat 33, in the process, the circular table part at one end plays a role in guiding the pipe orifice piece one by one, the cylindrical part 362 is a transition section, the profile design of the positioning inner supporting block 36 ensures that the forward and backward movement is not interfered by the pipe orifice piece, and the automatic one-by-one blanking of a plurality of pipe orifice pieces in the pre-storage box 34 can be realized. In addition, in the process of pushing the beveled end of the pipe orifice element and the side wall of the cylinder barrel part 41 to automatically adjust and engage through the positioning inner support block 36, in order to avoid triggering the cylinder barrel part 41 to cause deviation of the pipe orifice hole, the pressing mechanism 23 can be started again to press after the rotation and alignment of the cylinder barrel part 41 are completed, so that the accuracy of welding and alignment of the pipe orifice 43 is improved.

As shown in the figure 1 of the drawings, as shown in fig. 9 and 10, a U-shaped notch 2331 is formed in the middle of the lifting pressure plate 233, an opening direction of the U-shaped notch 2331 faces the pipe orifice positioning fixture, the U-shaped notch 2331 is used for avoiding a movement of the lifting structure in the pipe orifice inner support mechanism 24, the lifting pressure plate 233 is further equipped with the pipe orifice inner support mechanism 24, the pipe orifice inner support mechanism 24 comprises two lifting cylinders 241 vertically and fixedly mounted on a bottom end face of the lifting pressure plate 233 through bolts, a bridging top plate 242 is horizontally welded between output ends of the two lifting cylinders 241, a vertically-guided adjusting guide rail 243 is fixedly mounted on the bottom end face of the bridging top plate 242, two sliders 244 are slidably and adjustably mounted on the adjusting guide rail 243, an inner support assembly 245 is correspondingly arranged on each slider 244, an inner extension driving assembly 246 is further arranged on the bridging top plate 242, and the adjusting guide rail 243 is closer to the pipe orifice positioning fixture than the inner extension driving assembly 246; the inner supporting component 245 comprises a guide rod 2451 horizontally arranged on the sliding block 244 in a sliding mode, the axial direction of the guide rod 2451 points to the central shaft of the rotary drum and faces the pipe orifice positioning clamp, an end head disc 2452 is arranged at the end part, facing the pipe orifice positioning clamp, of the guide rod 2451, a return spring 2453 is sleeved on the guide rod 2451, two ends of the return spring 2453 are respectively fixed on the sliding block 244 and the end head disc 2452, six elastic inner supporting claws 2454 are uniformly distributed on the end head disc 2452 around the circumference of the central shaft of the guide rod 2451, and the front ends of the elastic inner supporting claws 2454 bend towards the central shaft direction of the guide rod 2451; the inward extending driving assembly 246 comprises a driving cylinder 2461 fixedly mounted at the top end of the bridging top plate 242 through bolts, a guide plate 2462 vertically fixed at the output end of the driving cylinder 2461 and two wedges 2463 slidably and adjustably mounted on the guide plate 2462; two wedges 2463 are arranged corresponding to the two inner support assemblies 245 one by one, and the wedges 2463 contact the guide rods 2451 through the inclined surfaces thereof to drive the guide rods 2451 to slide. In the nozzle inner support mechanism 24, the slide block 244 is slidable up and down along the adjustment guide 243 and locked and fixed by bolts, and similarly, the wedge 2463 is slidable up and down along the guide plate 2462 and locked and fixed by bolts.

After the two pipe orifice pieces are pushed and positioned by the pipe orifice positioning fixture, the pipe orifice pieces can be internally supported by the pipe orifice internal supporting mechanism 24, so that stable welding is convenient to perform during welding, and the welding quality of the pipe orifice pieces is improved; of course, before the hydraulic cylinder barrel 4 with different sizes and structures is processed, the pipe orifice support mechanism 24 needs to be correspondingly adjusted according to the specific distribution positions of the two pipe orifice pieces on the hydraulic cylinder barrel 4, specifically, under the condition that the lifting strokes of the two lifting cylinders 241 are kept unchanged, that is, the two lifting cylinders 241 drive the two inner support assemblies 245 to descend to the lowest position, which is taken as a reference, the two sliding blocks 244 are respectively loosened to enable the two inner support assemblies 245 to slide along the adjusting guide rail 243, and the two inner support assemblies 245 can be aligned to the positions of the two pipe orifice holes on the cylinder barrel part 41 after the sliding adjustment, and then the two sliding blocks 244 are sequentially locked to fix, and then the two wedge blocks 2463 are correspondingly adjusted in a sliding manner, so that the two wedge blocks 2463 complete corresponding position adjustment along with the two inner support assemblies 245.

Before formal welding of the two pipe orifice pieces, on one hand, the two inner support assemblies 245 are lowered into the inner cavity of the cylinder barrel part 41 along with the synchronous starting of the two lifting cylinders 241, then the driving cylinder 2461 is started to drive the guide plate 2462 to descend, the two wedges 2463 are lowered along with the guide plate 2462 synchronously, then the two wedges 2463 correspondingly drive the two inner support assemblies 245, so that the guide rod 2451 is abutted through the inclined surface of the wedge 2463, the guide rod 2451 passively slides forwards along the sliding block 244, the six inner support claws are aligned with the inner support claws to penetrate through the pipe orifice holes in the cylinder barrel part 2441 and then enter the inner cavity of the pipe orifice pieces, and the pipe orifice pieces are uniformly and internally supported under the elastic force of the elastic inner support claws 2454, so that stable welding is facilitated.

Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described in detail herein. Such variations do not affect the essence of the present invention and are not described herein.

The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; it will be understood by those skilled in the art that various changes and modifications may be made, or equivalents may be modified, without departing from the spirit of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. The utility model provides a hydraulic cylinder outer tube cylinder centre gripping frock clamp which characterized in that: comprises a workbench (1), a rotary clamp table (2) assembled on the workbench (1) and a pipe orifice positioning clamp (3) assembled on the workbench (1); wherein:

the rotary clamp table (2) comprises a rotary table mechanism (21) assembled on the workbench (1), the rotary table mechanism (21) comprises a rotary platform (213) vertically and rotatably installed, a synchronous positioning clamp (22) for axially aligning a cylinder barrel part and a flange plate is arranged on the rotary platform (213), and a pressing mechanism (23) for pressing the cylinder barrel part and the flange plate is arranged on the upper end surface of the rotary platform (213); the rotary platform (213) comprises a rotary drum (2131) with a closed bottom end and a round table top (2132) fixed at the top end of the rotary drum (2131);

mouth of pipe positioning fixture (3) include two vertical distributions and independently go up and down to install lift seat (33) that sets up, every equal vertical installation has on the up end of lift seat (33) and has counterpoint die clamping cylinder (35) with horizontal installation, it is upper and lower end open-ended square tubular structure to prestore case (34), counterpoint die clamping cylinder (35) output direction is followed rotary diameter direction setting of rotary platform (213), just counterpoint die clamping cylinder (35) with it is relative to prestore case (34) the centre of revolution of rotary platform (213) is by far to nearly distribution setting, counterpoint die clamping cylinder's (35) output fixedly connected with location interior kicking block (36), location interior kicking block (36) are gyration symmetrical structure, just the center pin of location interior kicking block (36) with the coincidence of counterpoint die clamping cylinder (35) output shaft, two side surfaces of the pre-storage box (34) facing the output direction of the alignment clamping cylinder (35) are provided with avoidance notches (342) used for avoiding the positioning inner supporting blocks (36), the avoidance notches (342) are rectangular and are formed in the lower end of the pre-storage box (34), and the left side and the right side of each avoidance notch (342) are flush with the inner side wall of the pre-storage box (34); the positioning inner supporting block (36) is sequentially provided with a section of circular table portion (361), a cylindrical portion (362), a section of circular table portion (363) and a cylindrical rod (364) from left to right, the small circular bottom surface of the section of circular table portion (361) is connected with the output end of the alignment clamping cylinder (35), the diameter of the small circular bottom surface of the section of circular table portion (361) is at most equal to the diameter of the output end of the alignment clamping cylinder (35), two end surfaces of the cylindrical portion (362) are respectively coplanar with the large circular bottom surface of the section of circular table portion (361) and the large circular bottom surface of the section of circular table portion (363), and the diameter of the cylindrical rod (364) is equal to the diameter of the small circular bottom surface of the section of circular table portion (363); when the elongation of the output end of the alignment clamping cylinder (35) is zero, the positioning inner supporting block (36) is positioned between the alignment clamping cylinder (35) and the pre-storage box (34);

the pipe orifice positioning clamp (3) further comprises two lifting guide frames (31) and two adjusting screw rods (32); the lifting guide frames (31) comprise vertical guide rails (311) fixedly installed on the table top of the workbench (1) and top plates (312) horizontally fixed at the top ends of the vertical guide rails (311), the two adjusting screw rods (32) and the two lifting guide frames (31) are installed in a one-to-one correspondence mode, and the adjusting screw rods (32) are vertically and rotatably installed between the table top of the workbench (1) and the top plates (312); the two lifting seats (33) are slidably mounted on the two vertical guide rails (311), the lifting seat (33) is in threaded connection with one of the adjusting screw rods (32) and is penetrated by the other adjusting screw rod (32), and the two lifting seats (33) are in threaded connection with different adjusting screw rods (32);

the pressing mechanism (23) comprises two upright columns (231) which are vertically and fixedly installed at the edge position of the circular table top (2132) and symmetrically arranged relative to the diameter of the circular table top (2132), an opening guide rail (2311) which vertically and downwardly extends is arranged on each upright column (231) from the top end, lifting cylinders (232) are correspondingly installed on the two upright columns (231), a lifting pressure plate (233) is installed between the two opening guide rails (2311) in a vertically sliding fit mode, and the lifting pressure plate (233) is fixedly connected with the output ends of the two lifting cylinders (232);

a U-shaped notch (2331) is formed in the middle of the pressure rising and reducing plate (233), an opening direction of the U-shaped notch (2331) faces the pipe orifice positioning fixture (3), a pipe orifice inner supporting mechanism (24) is further assembled on the pressure rising and reducing plate (233), the pipe orifice inner supporting mechanism (24) comprises two lifting cylinders (241) vertically and fixedly installed on the bottom end face of the pressure rising and reducing plate, a bridging top plate (242) is horizontally and fixedly installed between output ends of the two lifting cylinders (241), a vertically-guided adjusting guide rail (243) is fixedly installed on the bottom end face of the bridging top plate (242), two sliding blocks (244) are installed on the adjusting guide rail (243) in a sliding and adjusting mode, an inner supporting assembly (245) is correspondingly arranged on each sliding block (244), an inner extending driving assembly (246) is further arranged on the bridging top plate (242), and the adjusting guide rail (243) is closer to the pipe orifice positioning fixture (3) relative to the inner extending driving assembly (246); the inner supporting assembly (245) comprises a guide rod (2451) which is horizontally and slidably arranged on the sliding block (244), the axial direction of the guide rod (2451) points to the central axis of the rotary drum and is opposite to the pipe orifice positioning clamp (3), an end head disc (2452) is arranged at the end part, facing the pipe orifice positioning clamp, of the guide rod (2451), a return spring (2453) is sleeved on the guide rod (2451), two ends of the return spring (2453) are respectively fixed on the sliding block (244) and the end head disc (2452), a plurality of elastic inner supporting claws (2454) are uniformly distributed on the end head disc (2452) around the central axis of the guide rod (2451), and the front ends of the elastic inner supporting claws (2454) bend towards the central axis direction of the guide rod (2451); the inward extending driving assembly (246) comprises a driving cylinder (2461) fixedly arranged at the top end of the bridging top plate (242), a guide plate (2462) vertically fixed at the output end of the driving cylinder (2461) and two wedge blocks (2463) slidably and adjustably arranged on the guide plate (2462); the two wedges (2463) and the two inner support assemblies (245) are arranged in a one-to-one correspondence mode, and the guide rod (2451) is driven to slide by the wedges (2463) which are in top contact with the guide rod (2451) through inclined planes of the wedges.

2. The hydraulic cylinder outer tube cylinder clamping tool clamp as claimed in claim 1, and is characterized in that: the rotary table mechanism (21) further comprises a rotary supporting frame (211) and a rotary driving motor (212); the rotary table is characterized in that the rotary support frame (211) is fixedly installed at the bottom end of the table top of the workbench (1), the rotary drum (2131) penetrates through the table top of the workbench (1) and is vertically and rotatably installed on the rotary support frame (211) through a bearing, the rotary driving motor (212) is fixedly installed on the rotary support frame (211) through a motor fixing plate, a driving bevel gear (2121) is arranged on an output shaft of the rotary driving motor (212), and a bevel gear ring (2133) meshed with the driving bevel gear (2121) is fixedly installed on the rotary drum (2131).

3. The hydraulic cylinder outer tube cylinder clamping tool clamp as claimed in claim 2, and is characterized in that: the synchronous positioning clamp (22) comprises a clamping driving cylinder (221), four connecting rods (222) and four inner supporting and clamping components (223), wherein the clamping driving cylinder, the four connecting rods (222) and the four inner supporting and clamping components are vertically and fixedly arranged on the bottom end face of the rotating cylinder (2131); a square avoidance hole (2135) is formed in the center of the round table top (2132), slide rails (2136) are correspondingly arranged on the round table top (2132) at the positions of four sidelines of the avoidance hole (2135), the four slide rails (2136) are uniformly distributed around the circumference of a central shaft of the round table top (2132), the guide direction of the slide rails (2136) is arranged along the radial direction of the round table top (2132), and four avoidance openings (2134) which are in one-to-one correspondence with the four slide rails (2136) are formed in the top end of the rotating drum (2131); the four inner support clamping components (223) are installed in a one-to-one corresponding sliding fit mode with the four sliding rails (2136), one end of each of the four connecting rods (222) is hinged to the output end of the inner clamp driving cylinder (221), and the other end of each of the four connecting rods (222) is hinged to the four inner support clamping components (223) in a one-to-one corresponding mode.

4. The hydraulic cylinder outer tube cylinder clamping tool clamp as claimed in claim 3, and is characterized in that: the inner supporting and clamping component (223) comprises a vertical rod (2231), a matching sliding block (2232) positioned on the side wall of the vertical rod (2231), a roller frame (2233) positioned at the top end of the vertical rod (2231) and two inner supporting rollers (2234) vertically and rotatably mounted on the roller frame (2233); the vertical rod (2231) is hinged to one end of the connecting rod (222), the matching sliding block (2232) is in sliding fit with the sliding rail (2136), and the two inner supporting rollers (2234) are arranged in a radial symmetry mode relative to the circular table top (2132).

5. The hydraulic cylinder outer tube cylinder clamping tool clamp as claimed in claim 1, and is characterized in that: a clamping convex strip (341) which vertically extends downwards is arranged on the pre-storage box (34) in the middle on the inner wall of the side plate facing the rotary platform (213).

6. The hydraulic cylinder outer tube cylinder clamping tool clamp as claimed in claim 1, and is characterized in that: the bottom end of the adjusting screw rod (32) is provided with a hand wheel (321).