Background technology
Pipe joint is of a great variety, and it is the basic components of hydraulic system engineering, and its crudy has a significant impact tools such as safe, stable, life-spans of hydraulic system.Because all there is screw thread at the pipe joint two ends, after processing a side screw thread, the processing of the high-quality of opposite side screw thread is the difficult point of hydraulic connectors production unit always.At present the method that adopts has direct clamping screw thread, or the internal thread chuck that matches of employing and joint screw thread, and the holing clip cover is processed then, but there is following shortcoming in the method for having now:
1, directly the clamping screw thread crushes process side screw thread easily, catcher mark occurs, phenomenons such as random tooth.
2, the internal thread chuck that matches of employing and joint external screw thread can crush machining screw, long-time use rear thread chuck size changes and causes it can not clamp screw thread, thereby influence crudy, and after process finishing, need with spanner it firmly to be turned on, labour intensity is big and have a potential safety hazard.
Can cause wall compression to produce strain during 3, with the direct clamping light-wall pipe of three-jaw straight coupling, cause the processing dimension mistake, or produce expendable plastic deformation and cause workpiece to be scrapped.
Summary of the invention
Technical problem to be solved by this invention is the present situation at prior art, provides a kind of simple in structure, easy to operate, and labour intensity is low, the chuck that is used for pipe joint processing that crudy is good
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of chuck that is used for pipe joint processing, comprise the main body of tape spool to manhole, the inwall of main body and the shape of pipe joint to be processed are suitable, offer on the tube wall of main body and run through first of tube wall and crack, first end that cracks autonomous agent extends to the other end makes main body form a structure of not sealing.Main body inner wall of the present invention is used for realizing carrying out contraposition with pipe joint before clamping, because the relative pipe joint external diameter of main body inner wall diameter this moment is looser, and then utilize first compressibility of offering on the main body tube wall of cracking the tube wall that causes, make the inside contraction of main body tube wall can realize firm grip by external force to pipe joint, after the pipe joint completion of processing, only need remove external force, the tube wall reinstatement, at this moment, get final product take-off pipe joint easily, and do not need to use spanner firmly to screw out pipe joint, reduced labor intensity of operating personnel, and because the present invention itself has reversibility, therefore, apply again after the external force not yielding, thereby can guarantee the crudy of product, and longer service life; And the shape of inwall of the present invention and pipe joint to be processed is suitable, and is not limited to the screw-like pipe joint, makes that the scope of application of the present invention is wider.
Should say, the outer contour of the cross section of main body can be a different shape, its mainly act on be when applying external force for convenience the external force bringing device to the clamping of main body, such as its shape can be a triangle, quadrangle, pentagon or the like, convenience when considering harmony that the main body outer wall is stressed and clamping, preferred, the circle of the outer contour of the cross section of above-mentioned main body for not sealing.Circle is not only more simple and easy aspect processing, and each position is stressed, the distortion is more even, and stress is not easy to concentrate, and can also adapt to the clamping of various clamping devices simultaneously.
Because but first purpose of cracking mainly is the space that provides a voltage supply to contract for main body, therefore, first shape of cracking also has multiple choices, as long as a suitable slit can be provided, such as, first two sides of cracking can be respectively cancave cambered surface and the convex globoidals that cooperatively interacts, or the cooperation of bending side that concaves and cambered outwards bending side or the like, but preferred scheme is: first above-mentioned two sides of cracking are the plane.The selection of this preferred version mainly is to consider that from the convenience aspect of processing two sides are the plane, processes simple and conveniently, and processing cost is low, is suitable for extensive use.
Consider that key of the present invention is the compressibility of main body, therefore, further improve being: an end that offers at least one autonomous agent on the inwall of above-mentioned main body extends to first straight trough of the other end.After increasing by first straight trough, tube wall is easier in compression process bends herein, thereby can reduce main body tube wall in compression process and to the resistance of external force compression is more prone to, and reduces clamping process institute energy requirement.
Preferably, the first above-mentioned straight trough is two, and two first straight troughs are symmetrically distributed in first both sides of cracking the plane, place.From effect, two first straight troughs are compared one first straight trough and are had better effect, and can satisfy the demand fully, and the first too much straight trough can increase the difficulty and the cost of processing; And first straight trough that is symmetrically distributed guarantees that each position of main body is stressed, distortion is even, helps prolonging service life of the present invention.
Obviously, main body produces stress in the position of first straight trough easily and concentrates in compression process, thereby have influence on service life of the present invention, therefore, further improvement also comprises: the outside of the first above-mentioned straight trough has the coupled first logical deep-slotted chip breaker, and the width of first deep-slotted chip breaker is greater than the width of first straight trough.The design of first deep-slotted chip breaker has guaranteed that distortion of the present invention is even, the more important thing is and has avoided stress to concentrate, and has guaranteed that the present invention has higher service life.
In order to obtain better technique effect, further technical measures also comprise:
One end of above-mentioned main body is provided with the annular shoulder of external diameter greater than the external diameter of main body, first crack, first straight trough and first deep-slotted chip breaker extend and on annular shoulder, form respectively with it one to one to the annular shoulder direction second crack, second straight trough and second deep-slotted chip breaker.Annular shoulder can improve intensity of the present invention, further increase the service life, simultaneously, the annular shoulder back is adjacent to claw and can plays the effect of product axial location during use, main is that the handled easily personnel are being put into the present invention handing on the pipe joint and in the process of after the pipe joint completion of processing the present invention being taken off, and other structure mainly is to have continued the function of corresponding construction on the main body on the shoulder.
Further improve, the outside of second deep-slotted chip breaker also has the distinct opening of annular shoulder.The stress that has reduced annular shoulder that is provided with of this opening is concentrated, and makes its distortion more even, not fragile.
Because operating personnel need hand-held shoulder in operating process, can occur the main body tube wall once in a while and in compression process, second crack and clamp the phenomenon of finger, for fear of above-mentioned phenomenon, the second above-mentioned outside of cracking is shaped on one " V " shape opening.After having " V " shape opening,, in compression process, can not jam a finger even if operating personnel are placed on hand second place of cracking because of carelessness yet.
Further improve: the material that is adopted is a spring steel, and its hardness is controlled between the 40-50HRC.Guarantee its elasticity, make it be easier to be compressed, and its hardness to be controlled between the 40-50HRC be in order to prevent main body fragility height, it is short to reuse the life-span, or the distortion of cracking under stressing conditions.
Compared with prior art, the invention has the advantages that:
1, saved high-intensity wrench operated, labor intensity of operating personnel is low;
2, the present invention can realize quick replacing, has saved the operating time of getting, use, putting spanner, and the speed of outwarding winding is also much larger than the speed of using spanner to outward winding, and therefore, production efficiency improves greatly;
3, the present invention is big to externally threaded clamping force, and workpiece is difficult for loosening or the shake cutter during machined, and is not yielding.Improved the screw processing quality of pipe joint.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment as shown in the figure, figure grade explanation: main body 1, manhole 1a, first 1b that cracks, the first straight trough 1c, the first deep-slotted chip breaker 1d, annular shoulder 2, the second 2a that cracks, the second straight trough 2b, the second deep-slotted chip breaker 2c, opening 2d, " V " shape opening 2e.
Present embodiment is applicable to machining screw shape pipe joint, as shown in the figure, a kind of chuck that is used for pipe joint processing, comprise the main body 1 of tape spool to manhole 1a, the circle of the outer contour of the cross section of main body 1 for not sealing, be shaped on screw thread on the inwall of main body 1, offer on the tube wall of main body 1 and run through first of the tube wall 1b that cracks, first end that cracks 1b autonomous agent 1 extends to the other end makes main body 1 form a structure of not sealing, that an end that offers two autonomous agents 1 on the inwall of main body 1 extends to the other end and two first straight trough 1c that the side is the plane, and two first straight trough 1c are symmetrically distributed in first both sides of cracking plane, 1b place, the outside of the first straight trough 1c has the coupled first logical deep-slotted chip breaker 1d, and the width of the first deep-slotted chip breaker 1d is greater than the width of the first straight trough 1c; One end of main body 1 also is provided with the annular shoulder 2 of external diameter greater than the external diameter of main body 1, first crack 1b, the first straight trough 1c and the first deep-slotted chip breaker 1d to annular shoulder 2 directions extend and on annular shoulder 2, form respectively with it one to one second crack 2a, the second straight trough 2b and the second deep-slotted chip breaker 2c, the outside of the second deep-slotted chip breaker 2c also has annular shoulder 2 distinct opening 2d, and second outside of cracking 2a is shaped on one " V " shape opening 2e.
Wherein, the material that present embodiment adopted is spring steel 65Mn, and its hardness is controlled at 40-50HRC.
When using present embodiment, at first the chuck with present embodiment is screwed into the end that pipe joint has processed screw thread, clamping device clamps the chuck of present embodiment then, and apply external force, make first to crack and second closure of cracking, guarantee that clamping device is firm to the clamping of pipe joint to the chuck of the chuck of present embodiment and present embodiment, can process an end that does not have machining screw of pipe joint with that, after screw thread machines, unclamp clamping device, the chuck reinstatement of present embodiment, the chuck that can outward winding present embodiment this moment like a cork carries out processing next time.In addition, adding man-hour, prepare the chuck of two present embodiments, after the screw thread of pipe joint machines, take off the pipe joint of the chuck of band present embodiment, carry out the processing of next pipe joint with the chuck of another present embodiment, screw off the chuck of present embodiment again in process, production efficiency is higher.
Certainly, except the technical scheme of present embodiment, at the shape difference of pipe joint to be processed, main body inner wall also has different selections, as pipe joint to be processed be shaped as the thin-walled revolution workpiece of tubulose thin-wall part or corrugated cross sectional shape the time, the shape of main body inner wall is the suitable with it face of cylinder.In addition, the quantity of first straight trough and second straight trough also can be for one or more, and used spring steel also can be 60Si2Mn etc. except that 65Mn, and its hardness can be 40HRC or 55HRC or any number between the two.
Though the present invention illustrates and describes by the reference preferred embodiment,, those skilled in the art should understand, and in the scope of claims, can do the various variation on form and the details.