Adjustable eccentricity fixture tool set

Abstract

The adjustable eccentricity fixture tool set, the eccentric sleeve clamping piece is a cylinder with open ends, and the side wall is provided with an internal thread through hole; a plurality of nuts for connecting workpieces are arranged along the circumference of the eccentric sleeve clamping piece. The eccentric sleeve clamping piece is provided with a first eccentric hole for sleeving the eccentric sleeve clamping piece, and the side wall is provided with a plurality of external thread through holes for adjusting the eccentricity; the clamping screw is screwed into the external thread through hole and the internal thread through hole in sequence to adjust the eccentric distance of the eccentric sleeve clamping piece in the first eccentric hole. The present application changes the rotation center of the workpiece on the lathe by relying on the mutual cooperation of the eccentric sleeve, the eccentric sleeve, the eccentric sleeve, the sleeve and the fixture of the lathe, the center frame, the adjustment eccentricity of the workpiece, the calibration and the alignment process are fast and convenient, the eccentricity and the precision of the parts are guaranteed, and the accurate machining of the outer surface of the workpiece is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to a mechanical device for assisting part processing, in particular to a clamping tool set with adjustable eccentricity for manufacturing downhole exploration drilling tools. BACKGROUND

[0002] In mechanical transmission, the conversion of rotary motion and reciprocating motion is widely used (for example, automobile engine), and such motion is often realized through eccentric parts, such as eccentric wheels or crankshafts. Due to the limitations of lathe processing, such parts cannot be directly processed on a lathe, and the main problem is how to develop a suitable clamping positioning scheme while ensuring accuracy.

[0003] The traditional processing method is three-jaw turning, four-jaw turning, and chuck turning, etc. Such methods have complex clamping processes, difficult alignment, and are prone to errors during clamping. The method of adjusting the center distance is very complex. At the same time, these methods require high processing skills of the operator, so they are difficult to adapt to mass production. SUMMARY

[0004] In order to overcome the defects of the traditional technology, the present application aims to provide a clamping tool set with adjustable eccentricity for manufacturing downhole exploration drilling tools.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application provides a biasing sleeve for general lathe-deep hole drilling process, which comprises a biasing sleeve clamping part and a biasing sleeve clamping part; wherein the biasing sleeve clamping part is a cylindrical body with open ends, and the side wall is provided with an internal threaded hole; a plurality of nuts for connecting the workpiece are arranged along the circumference of one side of the biasing sleeve clamping part, and the opening of the nut is radial.

[0006] The biasing sleeve clamping part is provided with a first eccentric hole for the biasing sleeve clamping part to be inserted into, and the side wall is provided with a plurality of external threaded holes for adjusting the eccentric distance; the tight screws are screwed into the external threaded holes and the internal threaded holes in sequence to adjust the eccentric distance of the biasing sleeve clamping part in the first eccentric hole.

[0007] Among them, the biasing sleeve clamping part is marked with a scale along the eccentric direction, the center distance is marked and the eccentric direction is marked.

[0008] Among them, the external threaded holes are arranged on the opposite side walls of the biasing sleeve clamping part along the eccentric direction.

[0009] Among them, the biasing sleeve clamping part is provided with a guide rail that can be pressed along the eccentric distance direction, and the biasing sleeve clamping part is provided with a guide groove that can accommodate the guide rail.

[0010] Among them, the biasing sleeve clamping part is a cylindrical body with open ends.

[0011] Among them, the first eccentric hole is an oblong hole.

[0012] The biasing sleeve clamping part is formed by bending a thin wall to form a circular tube with open ends.

[0013] The present application provides a eccentric sleeve for finish turning process, the sleeve body is a cylinder, one side end face is provided with a column type slot for inserting the end of the workpiece, the side wall of the column type slot is provided with a plurality of threaded through holes for fixing the workpiece.

[0014] The end face of the other end of the sleeve body is provided with a second guide rail, and a movable part is embedded in the second guide rail and can slide; the movable part is a cuboid, and a thimble hole is arranged on the corresponding outer side, and a threaded hole is arranged on the side far away from the thimble hole.

[0015] The present application also provides an eccentric sleeve for finish turning process, which comprises an eccentric sleeve clamping part and an eccentric sleeve clamping part, wherein the eccentric sleeve clamping part is a cylindrical body with through holes at both ends, and the inner cavity is used for fixing the workpiece after rough machining.

[0016] The eccentric sleeve clamping part is a cylindrical body provided with a second eccentric hole, and a second external threaded through hole is arranged at the position with the maximum wall thickness of the side wall of the eccentric hole, which is used for penetrating a tightening bolt to fix the position of the eccentric sleeve clamping part.

[0017] The eccentric sleeve clamping part is provided with a scale along the eccentric distance direction, and the corresponding side surface position of the clamping part is marked with a line.

[0018] The inner side of the eccentric sleeve clamping part is provided with a guide rail which can be pressed along the eccentric distance direction, and the eccentric sleeve clamping part is provided with a guide groove which can accommodate the guide rail.

[0019] The side wall of the eccentric sleeve clamping part is provided with a through narrow slot along the axial direction, and two connecting plates are welded at the positions on both sides of the narrow slot, and connecting holes through which bolts can pass are drilled in the two connecting plates, and the bolts pass through the two connecting holes and are fastened to realize the clamping of the workpiece.

[0020] The eccentric sleeve clamping part is formed by bending a thin wall to form a cylindrical body with open ends.

[0021] The present application also provides a sleeve for pipe turning process, the sleeve body is a cylindrical body provided with an eccentric hole, and a through narrow slot is arranged along the axial direction in the thinnest direction of the cylindrical wall.

[0022] Compared with the prior art, the present application changes the rotation center of the workpiece on the lathe by relying on the cooperation of the biasing sleeve, the eccentric sleeve, the eccentric sleeve, the sleeve and the clamp and the center frame of the lathe, the adjustment eccentric distance, the calibration and the alignment process of the workpiece are fast and convenient, the eccentric distance and the precision of the part are guaranteed, and the accurate machining of the outer surface of the workpiece is realized.

[0023] The eccentric workpiece outer surface rough machining and finishing are realized step by step by the fixture tooling, the arrangement is reasonable, the process is compact, the part installation and alignment are realized more conveniently, and the workpieces with different eccentric distances are machined.

[0024] The fixture tooling has less parts, reduces the complexity of the whole system, and has simple and convenient part installation process, and has low requirement on the machining skill of the operator during installation. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of the eccentric sleeve;

[0026] Figure 2 It is a structure schematic view of the eccentric sleeve clamping part;

[0027] Figure 3 It is a structure schematic view of the eccentric sleeve clamping part;

[0028] Figure 4 It is a structure schematic view of the eccentric sleeve and the moving part thereof;

[0029] Figure 5 It is a structure schematic view of the eccentric sleeve;

[0030] Figure 6 It is a structure schematic view of the eccentric sleeve clamping part;

[0031] Figure 7 It is a structure schematic view of the eccentric sleeve clamping part;

[0032] Figure 8 It is a structure schematic view of the eccentric sleeve;

[0033] Figure 9 It is a schematic view of the first step clamping in the fixture in the general lathe-deep hole drilling process of the embodiment of the application;

[0034] Figure 10 It is a use instruction view of the eccentric sleeve;

[0035] Figure 11 It is a schematic view of the second step clamping in the fixture in the general lathe-deep hole drilling process of the embodiment of the application;

[0036] Figure 12 、 13 It is a schematic view of the clamping of the fixture in the finishing lathe process of the embodiment of the application (eccentric sleeve and eccentric sleeve);

[0037] Figure 14 It is a schematic view of the clamping of the fixture in the pipe lathe process of the embodiment of the application;

[0038] Refer to the accompanying drawings, 1, 11, 16, scale; 2, 17, guide rail; 3, welding nut; 4, 18, guide groove; 5, internal threaded through hole; 6, 14, 19, marking; 7, tightening screw; 8, deflection sleeve clamping part; 9, tightening bolt; 10, deflection sleeve clamping part; 12, second guide rail; 13, eccentric sleeve moving part; 15, ejector pin hole; 20, connecting plate. DETAILED DESCRIPTION

[0039] The present invention will now be further described with reference to the accompanying drawings.

[0040] See also Figures 1 to 14 , Figures 1 to 14 The present invention adopts the following technical solution: the processing of the fixture of this embodiment requires four main parts, including a deflection sleeve, an eccentric sleeve, an eccentric jacket and a jacket, to undertake the process steps.

[0041] See also Figures 1-3 The deflection sleeve is a key component of the conventional turning-deep hole drilling process tooling. This tooling is the first set of tooling used in this process. The deflection sleeve consists of a deflection sleeve holder and a deflection sleeve clamp. The deflection sleeve holder is a cylinder with an eccentric oblong hole (the first eccentric hole). Threaded holes (externally threaded holes) are radially defined along the thickest and thinnest wall thicknesses.

[0042] Preferably, a scale is marked along the eccentric direction of the deflection sleeve clamp to indicate the center distance and the eccentric direction; a guide rail is installed on its inner wall along the eccentric direction. The deflection sleeve clamp is a thin-walled tube with four radial nuts symmetrically welded along one side. The interior of the tube is for the workpiece to pass through and be fixed. The side wall is provided with an internal threaded through hole corresponding to the external threaded through hole on the outer wall. During the process, the deflection sleeve clamp is first marked on the bottom surface of both sides of the workpiece to determine the center distance and a center hole for clamping is drilled. Then, the deflection sleeve clamp is installed along the eccentric direction on the large outer cylindrical surface. The nuts are inserted through the nuts to fix the deflection sleeve clamp. The set screws are screwed into the external threaded through hole and the internal threaded through hole in sequence to adjust and compensate for the eccentric distance of the deflection sleeve clamp in the first eccentric hole. The installation positions are respectively the other side opposite to the processing side and the center frame installation position. The deflection sleeve clamp and the end face of the workpiece are marked in advance along the eccentric direction. During installation, the two marked lines are aligned with each other to complete the calibration. When installing the workpiece, the three-jaw chuck is clamped on the outer deflection sleeve clamping piece, and the center frame is placed on the inner deflection sleeve clamping piece.

[0043] See also Figure 4, the eccentric sleeve and the eccentric sleeve are main parts of the finishing process tooling, which is the second set of tooling applied to the process. The eccentric sleeve body is a cylinder with a cylindrical groove on one side end face, the diameter of the cylindrical groove is the diameter of the eccentric small outer cylindrical surface processed in the previous process group, and the side wall of the cylindrical groove is uniformly provided with four through threaded holes along the circumference. In assembly, the workpiece is fixed by screwing the bolts into the threaded holes. The other side end face of the eccentric sleeve is processed with a second guide rail, and a movable member is embedded in the second guide rail. The movable member is a cuboid, and a variable eccentricity distance thimble hole is provided on the outside corresponding to the installation. A threaded hole parallel to the second guide rail is provided on the side far away from the thimble hole, the thimble hole is used to accommodate the lathe thimble, the workpiece and the tooling group are fixed, the eccentricity is realized, and the threaded hole is used to pass the screw from the side of the eccentric sleeve with the threaded hole. The eccentricity distance is the eccentricity distance required for processing the workpiece. In order to facilitate the determination of the eccentric direction and the eccentricity distance, the center distance is marked by aligning the workpiece and marking the scale beside the second guide rail.

[0044] Referring to Figures 5-7 , the eccentric sleeve is composed of an eccentric sleeve clamping member and an eccentric sleeve clamping member. The eccentric sleeve clamping member is a thin-walled cylinder (tubular), in order to realize the clamping of the eccentric sleeve without damaging the processed surface during clamping, the side wall of the eccentric sleeve clamping member is broken in the axial direction, a narrow gap is opened, and two connecting plates are welded on both sides of the narrow gap. The connecting plate is provided with a connecting hole for passing through the bolt, and the clamping of the workpiece is realized by the fastening of the bolt.

[0045] The eccentric sleeve clamping member is a cylinder with an eccentric long circular hole (second eccentric hole), and a scale is placed in the eccentric distance direction to identify the eccentric distance. Threaded holes are opened in the thickest part of the side wall for passing through the bolts to fix the position of the clamping member. In the process, the eccentric sleeve and the eccentric sleeve clamping member are installed on both sides of the workpiece, i.e. the position of the eccentric hole cylindrical surface after rough machining, the workpiece is directly inserted into the cylindrical groove of the eccentric sleeve, and after the calibration of the large outer cylindrical surface, the workpiece is fixed by screwing and screwing into the threaded hole on one side of the guide rail. After the workpiece is placed in the eccentric sleeve, the workpiece and the tooling are installed on the lathe, the lathe thimble is clamped against the eccentric sleeve center hole, and the eccentric sleeve is clamped by the three-jaw chuck, so as to fix the eccentric sleeve on the workpiece.

[0046] Referring to Figure 8The sleeve is a main part of a pipe machining tooling, the tooling is a third tooling applied to the present process in a process sequence, the sleeve is a cylinder with an eccentric hole, to prevent damage to the machined surface of the workpiece during clamping, the inner surface of the sleeve has high machining precision, a through narrow slot is machined in the axial direction of the thinnest wall of the cylinder to accommodate the deformation caused by clamping. To improve precision and simplify the machining process, the workpiece is designed in a non-variable eccentricity form, after the sleeve is installed on the large cylindrical surface and clamped by the chuck, the two eccentric cylindrical surfaces, the transition surface and the inner hole are machined simultaneously, and the pipe thread is machined.

[0047] Based on the above fixture tooling set, the complete machining process of the workpiece can be divided into five process groups, which are 1) positioning-rough machining process, 2) scribing-rough machining-deep hole drilling process, 3) thickness measurement-semi-fine milling-fine machining process, 4) pipe machining process and 5) end milling-jigging process. The functions of the first four process groups are to machine the main shape of the part, and the function of the last process group is to machine the placement position of the sensor and other instruments. Among all the machining processes, the scribing-rough machining-deep hole drilling process, the thickness measurement-semi-fine milling-fine machining process and the pipe machining process involve the machining of eccentric cylindrical surfaces, which are relatively difficult to achieve in the machining process, so the focus of machining is on these three process groups.

[0048] Process group 1) is positioning-rough machining process.

[0049] A complete long cylindrical bar stock is obtained, the bar stock is first cut to the required length of the part, then the material is fed into the lathe, rough machining is performed to a size close to the diameter of the large outer cylindrical surface, and then the straightness of the cylindrical surface is calibrated once. Process group 2) is scribing-rough machining-deep hole drilling process.

[0050] The main machining target of this process group is the rough machining of the eccentric outer cylindrical surface and the transition. First, the jigging process is performed, the center distance scribing mark position is determined on the bottom surface of the workpiece, and the center hole required when the workpiece and the inner hole are clamped by the center pin is drilled at the determined position; then, one side of the eccentric small outer cylindrical surface and the transition surface are rough machined, the installation method is as shown in Figure 9 The two eccentric sleeves are adjusted to change the eccentricity of the workpiece, the eccentric sleeves change the rotation center of the workpiece and compensate for the eccentricity of the workpiece; the eccentricity of the two eccentric sleeves is calibrated, after calibration is completed, the sleeves are fixed on the workpiece by tightening the bolts, the eccentric sleeve close to the bottom is fixed by the three-jaw chuck, and the eccentric sleeve in the middle is fixed on the center rest. The workpiece is a long part, if the middle part of the workpiece is not supported, the stress will cause deformation to accumulate on the part, which will greatly reduce the machining precision of the workpiece, therefore, the center rest is installed in the middle of the workpiece to reduce the error.

[0051] In the processing side, the center hole is topped with a center pin, and the deviation small outer cylindrical surface and the transition slope are turned out according to the process drawing. The workpiece is removed, and the unprocessed side deviation sleeve is removed. The processed deviation small outer cylindrical surface is clamped by a three-jaw chuck. The deviation small outer cylindrical surface has not been precisely processed, so it can be directly clamped. The center part of the deviation sleeve is fitted on the center frame, and the center pin is topped on the center hole. As shown in Figure 11 , the remaining side deviation small outer cylindrical surface and the transition slope are roughly turned. At this time, the center part of the deviation sleeve is not removed. Finally, the deviation small outer cylindrical surface is used as a reference to fit the center frame to drill, expand and bore the eccentric through hole. After the through hole is processed, the corresponding through rod is used for inspection.

[0052] The processing technology group 3) is a thickness measurement-semi-precision milling-precision turning process.

[0053] The main processing target of this process group is the precision machining of the large outer cylindrical surface and the transition. First, the wall thickness of the workpiece is measured and the data is recorded. Then, the workpiece is installed on the gantry vertical machining center. The two end outer circles are semi-precision milled according to the process requirements and coaxiality requirements. One end outer circle and the other end outer circle are clamped respectively, the center frame is fitted, the two end outer circles are corrected, the remaining amount is divided, the total length is milled, and the hole opening is deburred. Then, the part is measured by the bench worker process, and the highest point of the shaft end and the large outer circle is found. Then, the center cross line is drawn on the two shaft end outer circles. This step is used for the next step to make the tooling easy to align with the workpiece. Then, the tooling is installed, the graduation line of the eccentric sleeve is aligned with the graduation line of the shaft end outer circle, the workpiece is placed in the cylindrical groove of the eccentric sleeve, the eccentric distance of the eccentric sleeve is adjusted, and the calibration is completed. After the bolt is screwed in for clamping, the graduation line of the eccentric clamp sleeve is aligned with the graduation line of the other end shaft end outer circle. After alignment, it is installed on the other side of the shaft end outer circle. After calibration, the material can be cut. As shown in Figure 12 Figure 13 , the eccentric clamp sleeve is installed on the three-jaw chuck, the three-jaw chuck clamps the eccentric clamp sleeve, and the eccentric clamp sleeve helps the workpiece to compensate for the eccentric distance generated during installation due to the eccentric small outer cylindrical surface. The other end is topped with a center pin on the center hole of the eccentric sleeve, and the center hole compensates for the eccentric distance. Finally, the large outer cylindrical surface is precisely turned to the required diameter and the wall thickness is controlled and adjusted uniformly.

[0054] The processing technology group 4) is a pipe turning process.

[0055] The main processing target of this process group is the precision machining of the eccentric cylindrical surface and the transition. First, the tooling is installed on the workpiece, and two clamp sleeves are taken. The clamp sleeves are installed on the large outer cylindrical surface, as shown in Figure 14 ​As shown, the tool is inserted into the through hole of the pipe thread lathe together with the workpiece, after calibration, the two chucks are fixed and clamped respectively, the cylindrical surface inside the clamp sleeve is in contact with the workpiece, which can greatly reduce the surface deformation of the workpiece and prevent damage to the workpiece; then take the inner hole as the reference, correct the inner hole runout of both ends; then finish machining the eccentric cylindrical surface and transition, and at the same time, process the external threads and stepped holes on both sides, and finally process the thread protection sleeve on both sides. The machining process group 5 is vertical milling-wrenching process.

[0056] The main machining target of this process group is the machining of the installation position of parts such as sensors. The workpiece is fixed on the vertical milling machine, and then the flat features on both sides are milled in sequence, the grooves, fillets, planes and U-shaped grooves are milled, the threaded holes are drilled and milled, then the threads are tapped by wrenching, and finally the workpiece is surface treated.

[0057] The embodiments of the present application are described above in combination with the drawings and examples, and the structure given by the examples does not constitute a limitation on the present application, and skilled persons in the art can make adjustments as needed, and various modifications or modifications within the scope of the appended claims are within the protection scope.

Claims

1. An adjustable offset fixture set, comprising: The offset sleeve for the rough turning-deep hole drilling process, the eccentric sleeve for the finish turning process, the eccentric sleeve for the finish turning process, and the sleeve for the pipe turning process are included. The offset sleeve includes an offset sleeve holder and an offset sleeve clamping piece. The offset sleeve clamping piece is a cylinder with open ends, and the side wall is provided with an internal threaded through hole. A plurality of nuts for connecting the workpiece are arranged along the circumference of one side of the offset sleeve clamping piece, and the openings of the nuts are radial. The offset sleeve holder is provided with a first eccentric hole for the offset sleeve clamping piece to be inserted into, and the side wall is provided with a plurality of external threaded through holes for adjusting the eccentric distance. The tight screws are screwed into the external threaded through holes and the internal threaded through holes in sequence to adjust the eccentric distance of the offset sleeve clamping piece in the first eccentric hole. The sleeve body of the eccentric sleeve is a cylinder, and one side end face is provided with a column-shaped groove for inserting the end of the workpiece. The side wall of the column-shaped groove is provided with a plurality of threaded through holes for fixing the workpiece. The eccentric sleeve includes an eccentric sleeve holder and an eccentric sleeve clamping piece. The eccentric sleeve clamping piece is a cylinder with through holes at both ends, and the inner cavity is used to fix the workpiece after rough machining. The eccentric sleeve holder is a cylinder provided with a second eccentric hole. The maximum wall thickness of the side wall of the eccentric hole is provided with a second external threaded through hole for passing in a tight bolt to fix the position of the eccentric sleeve clamping piece. The sleeve body of the sleeve is a cylinder provided with an eccentric hole, and a through narrow slit is arranged in the axial direction at the thinnest direction of the cylindrical wall.

2. The fixture assembly with adjustable eccentricity according to claim 1, characterized in that: The offset sleeve holder is marked with a scale along the eccentric direction, the center distance is marked, and the eccentric direction is marked.

3. The adjustable offset fixture assembly of claim 1, wherein: The external threaded through holes are arranged on the opposite side walls of the offset sleeve holder along the eccentric direction.

4. The adjustable offset collet tool set of claim 1, wherein: The offset sleeve holder is a cylinder with open ends.

5. The adjustable offset collet tool set of claim 1, wherein: The first eccentric hole is an oblong hole.

6. The adjustable offset collet tool set of claim 1, wherein: The offset sleeve clamping piece is formed by bending a thin wall into a circular tube with open ends.

7. The adjustable offset collet tool set of claim 1, wherein: The end face of the other end of the sleeve body is provided with a second guide rail, and a movable member is embedded in the second guide rail. The movable member is a cuboid, and a thimble hole is provided on the corresponding outer side. A threaded hole is opened on the side far away from the thimble hole.

8. The adjustable offset collet tool set of claim 1 or 7, wherein: The side edge of the second guide rail is provided with a scale.

9. The adjustable offset collet tool set of claim 1, wherein: The eccentric sleeve clamping piece is provided with a scale along the eccentric distance direction, and the corresponding side surface position of the clamping piece is marked with a line.

10. The adjustable offset collet tool set of claim 9, wherein: The side wall of the eccentric sleeve clamping piece is provided with a through narrow slit in the axial direction. Two connecting plates are arranged on both sides of the narrow slit, and connecting holes for passing in bolts are arranged on the two connecting plates. The bolts pass through the two connecting holes and are fastened to realize the clamping of the workpiece.

11. The adjustable offset collet tool set of claim 9 or 10, wherein: The eccentric sleeve clamping piece is formed by bending a thin wall into a cylinder with open ends.

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