The clamping tool that a kind of machining large link rod is used
Technical field
The present invention relates to machining, the clamping tool that particularly a kind of machining large link rod is used.
Background technology
The connecting rod of large-scale marine low speed diesel engine is that the core of marine diesel connects and drive disk assembly, and big and its two ends of the weight of this connecting rod are tuning fork shape structure, and all there is a semicircle breach at both ends.This connecting rod carries out finish turning at large-scale lathe and adds man-hour, can not directly roll with chuck in head end and hold, and the other end also can not push up deciding in the hole in the semicircle breach because of the tailstock thimble extension elongation on the lathe is not enough.
In the middle of the prior art, the process that ends such as solution diesel engine connecting bar have the large-scale workpiece turning processing and loading clamp of big dark cavity generally is: respectively add in the end of connecting rod band cavity and weld anchor clamps or technology piece, reroll, push up these anchor clamps or technology piece, or the mosaic technology stifle and then withstands the technology stifle of being inlayed and carries out clamping tamping this cavity in the cavity of tailstock end.
There is following problem in clamping process in the above-mentioned technology that large link rod is machined:
1. diesel engine connecting bar and many axial workpieces often do not allow to weld in process, in order to avoid the high temperature in when welding destroys the material structure of part;
2. the anchor clamps or the technology piece that add weldering in the end of workpiece are destructive often when removing, so generally all can not reuse the processing cost height;
The method of 3. inlaying stifle exists mounting or dismounting inconvenience, the shortcoming of processing characteristics instability and poor reliability;
4. welding and install and remove the technology stifle needs the multiplex (MUX) to plant to cooperate, and it is low to cause processing operating efficiency like this, and labor intensity of operating personnel is big.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, the clamping tool that provides a kind of machining large link rod to use is clamped in large-scale workpieces such as connecting rod by clamping tool of the present invention and processes on the lathe, reaches specific processing purpose.The clamping tool that machining large link rod of the present invention is used draws materials conveniently, with low cost, efficient height, the reliable advantage of machining accuracy.
Technical scheme of the present invention:
The clamping tool that a kind of machining large link rod is used, its characteristics are that this clamping tool is by the small end anchor clamps that are installed on small end and rolls the matched clamp that constitutes in the connecting rod lower end of connecting rod lower end anchor clamps:
Described small end anchor clamps are by body, bolt, swivel nut and push rod are formed, described body is the flat board of a rectangle, the center of body has the centre bore of perforation both sides, the corner location of body is provided with the bolt hole of four perforations, be provided with the bolt of four penetrable these bodies in four bolts hole, four bolts are piercing in a side of body in the same way, central hole in this side is fixed with described swivel nut, the axis of this swivel nut and the dead in line of centre bore, one end of described push rod is provided with external screw thread, this push rod is fixed in the described swivel nut by external screw thread, and can realize the flexible of this push rod by the rotation push rod, the other end of this push rod peaks at deciding in the hole of connecting rod groove;
Described connecting rod lower end anchor clamps comprise two identical branch anchor clamps, this minute, anchor clamps were made up of steel pipe, the catch jacket that is fixed in steel pipe middle part and the lock-screw on the catch jacket, described catch jacket is a rectangle frame cover that can be nested on the lathe claw, one sidewall of this rectangle frame cover is fixed on the described steel pipe, and this rectangle frame jacket wall is provided with stationary jaw and the lock-screw that divides anchor clamps.
Respectively be provided with a guide pin bushing in two bolts hole at diagonal angle in four bolts hole that described body is four jiaos, described bolt passes described guide pin bushing, one end of this guide pin bushing is positioned at the bolt hole at diagonal angle, and the other end that guide pin bushing stretches out is embedded in the location counterbore on the described connecting rod end face.
Also be provided with a nut on the external screw thread of described push rod end, screw this nut and be butted on the swivel nut, further fixed mandril and swivel nut.
Described steel pipe can be other shaped steel such as square steel, rod iron, rhombus steel etc. and substitutes.
Technological merit of the present invention:
The clamping tool that machining large link rod of the present invention is used cooperates common lathe to use, can machine large link rod, solve large link rod and can not directly be positioned over a difficult problem of processing on the lathe, simultaneously, the clamping tool of machining large link rod of the present invention has simple in structure, and is easy to use, cheap, and safe and reliable, realized the high accuracy processing of large-scale workpieces such as connecting rod.
Description of drawings
The schematic diagram of the clamping tool clamping connecting rod that Fig. 1 uses for a kind of machining large link rod of the present invention.
The axial right view of the small end anchor clamps in the clamping tool that Fig. 2 uses for a kind of machining large link rod of the present invention.
The sectional arrangement drawing of the small end anchor clamps in the clamping tool that Fig. 3 uses for a kind of machining large link rod of the present invention.
The axial left view of the connecting rod lower end anchor clamps in the clamping tool that Fig. 4 uses for a kind of machining large link rod of the present invention.
Among the figure,
1-small end anchor clamps 11-guide pin bushing 12-body 13-swivel nut
14-nut 15-push rod 16-bolt
2-connecting rod lower end anchor clamps 20-divide anchor clamps 21-steel pipe
22-catch jacket 23-lock-screw
3-connecting rod 4-claw
The specific embodiment
Come the clamping tool that machining large link rod of the present invention is used is further described below in conjunction with accompanying drawing and specific embodiment, but should therefore not limit protection scope of the present invention.
Please see Figure 1, the schematic diagram of the clamping tool clamping connecting rod that Fig. 1 uses for a kind of machining large link rod of the present invention.As seen from the figure, the clamping tool and the lathe of a kind of machining large link rod of the present invention are used, and the large link rod that uses on the marine diesel is carried out turning processing.All there is the groove of semicircular in shape at the two ends of this large link rod 3, are forked, directly can not grip this large link rod 3 reliably with the claw on the lathe, and thimble on the lathe can not directly be butted on deciding in the hole of bottom portion of groove to the other end because groove is too dark.Therefore, just can not guarantee the crudy of large link rod 3 and the safety in the process, need special clamping tool to assist to process.The clamping tool that machining large link rod of the present invention is used is made up of small end anchor clamps 1 and connecting rod lower end anchor clamps 2, and described small end anchor clamps 1 are installed on the upper end of connecting rod 3 for jail, thimble top, and described connecting rod lower end anchor clamps 2 roll the lower end of holding connecting rod 3.
Embodiment 1
A preferred embodiment of the present invention is exactly that connecting rod car to big marine diesel engine adds the clamping tool of using man-hour, the matched clamp that this clamping tool is made up of small end anchor clamps 1 and connecting rod lower end anchor clamps 2.
Please see Figure 2, Fig. 3, the axial right view of the small end anchor clamps in the clamping tool that Fig. 2 uses for a kind of machining large link rod of the present invention, the sectional arrangement drawing of the small end anchor clamps in the clamping tool that Fig. 3 uses for a kind of machining large link rod of the present invention.As seen from the figure, described small end anchor clamps 1 include the tabular body 12 of a rectangle, the Si Jiaochu of this body 12 has four 121, four bolts 16 of screw that connect both sides and penetrates four bolts hole 121 in the same way from a side of body 12 respectively and be fixed in four technology screws on the connecting rod 3 upper end end faces.Respectively be equipped with a guide pin bushing 11 in two bolts hole 121 at diagonal angle in four bolts hole 121 on the body 12, one end of this guide pin bushing 11 is positioned at the bolt hole 121 at diagonal angle, the other end is embedded in the technology screw that has the location counterbore on connecting rod 3 end faces, the center of body 12 has the centre bore 122 of a perforation body 12 both sides, center in body 12 1 sides that four bolts 16 pass is welded with a swivel nut 13, accurately fixedly swivel nut 13 is in the inboard of body 12 by welding manner, and the outside of centre bore 122 can position the thimble on the lathe on the main body 12.
The axis of the axis of swivel nut 13 and centre bore 122 coincides, one end of described push rod 15 is provided with the external screw thread that matches with the internal thread of swivel nut 13, external screw thread by push rod 15 1 ends can be threaded onto an end of push rod 15 in the swivel nut 13, and can in certain limit, carry out the flexible of push rod 15 length as required, on the external screw thread of push rod 15, also be rotary with a nut 14, screwing this nut 14 can be fixed in the push rod 15 that regulates length on the body 12, thimble on the lathe is butted on the outside of centre bore 122 like this, and there is push rod 15 fixing in the swivel nut 13 inboard of centre bore 122, this push rod 15 peaks at deciding in the hole in the connecting rod 3 upper end grooves, then be equivalent to prolong the thimble of lathe, body 12 then is fixed on the upper surface of connecting rod 3 by bolt 16, then connecting rod 3 can be fixed in firmly the end that lathe has the afterbody thimble by small end anchor clamps 1.The other end of connecting rod 3 then rolls in four claws 4 of lathe one end by connecting rod lower end anchor clamps 2.
As Fig. 1, shown in Figure 4, the axial left view of the connecting rod lower end anchor clamps in the clamping tool that Fig. 4 uses for a kind of machining large link rod of the present invention.As seen from the figure, connecting rod lower end anchor clamps 2 among the present invention comprise that two identical branch anchor clamps 20, this minute anchor clamps 20 are made up of steel pipe 21, the catch jacket 22 that is fixed in steel pipe 21 middle parts and clamping screw 23, described catch jacket 22 is for being nested in the rectangle frame cover on the lathe claw 4, one sidewall of this rectangle frame cover is welded in the medium position of steel pipe 21, and another relative sidewall of rectangle frame cover is provided with stationary jaw 4 and the lock-screw 23 that divides anchor clamps 20.In two catch jackets that are placed in 22 on the lathe in four claws 4, connecting rod lower end anchor clamps 2 are fixed on the claw 4 by screwing lock-screw 23.
The clamping tool of the connecting rod Vehicle Processing of the big marine diesel engine in the present embodiment, the method for its connecting rod clamping is carried out as follows:
(1) is put on the horizontal large-scale lathe at large link rod 3 and carries out the turning first being processed, want earlier on CNC planer type milling machine body with large link rod 3 as benchmark, mill the upper end end face of flat this gonnecting rod body 3, and four finished product screwhole positions on this end face process four technology screw (M30, wherein two have the location counterbore), the shaft center of while at the bottom of the hole of the upper end of gonnecting rod body 3 dead eye processes the guiding of deep hole machining and decides the hole;
(2) two the guide pin bushings 11 location back of small end anchor clamps 1 by the diagonal angle is fastened to four bolts 16 in the technology screw on the upper surface of gonnecting rod body 3, push rod 15 is stretched in the groove of connecting rod 3;
(3) push rod 15 on the swivel nut 13 is fixed in rotation, its other end is peaked in the pilot hole of connecting rod, locks with nut 14 behind the stretching, with effective enhancing anchor clamps whole rigidity and intensity;
(4) the connecting rod lower end anchor clamps 2 that will be made up of two branch anchor clamps 20 install to this anchor clamps cover on upper and lower two claws 4 of lathe by the catch jacket 22 that rectangular box is arranged, and screw lock-screw 23 connecting rod lower end anchor clamps 2 are fixed on the claw 4;
(5) connecting rod 3 that will load onto the small end anchor clamps 1 of present embodiment lifts on the horizontal lathe, makes thimble on the tailstock of lathe peak at centre bore 122 on the small end anchor clamps 1, and the claw 4 of lathe rolls the lower end of holding connecting rod 3;
(6) will the direction that two claws 4 that divide anchor clamps 20 are turned into outside support be installed on the lathe, outwards clamp two jaws of gonnecting rod body 3 lower ends, two claws 4 on the lathe are by the outside of connecting rod lower end anchor clamps 2 inside clamping connecting rods 3 lower ends, the inside of two claw 4 outside clamping connecting rods 3 can be fixed in the lower end of connecting rod 3 on the claw 4 of lathe.
Finish the preceding clamping of connecting rod Vehicle Processing of diesel engine, can carry out school mediation processing by the Vehicle Processing requirement.
In sum, the present invention solves as ends such as diesel engine connecting bars and has the clamping problem that the big large-scale workpiece of breach (or cavity) deeply carries out machinings such as turning, and it is simple in structure that clamping tool has, easy to use, and efficient is expensive low, safe and reliable.