Flaring type elbow joint turning tool and using method thereof

Abstract

A flaring type elbow joint turning tool comprises a base, a fixed clamping mechanism, a balance weight adjusting mechanism and an auxiliary force increasing unit. The fixed clamping mechanism comprises a clamping block base fixed to the base, a clamping block body fixed to the clamping block base, an auxiliary clamping part and a first locking screw penetrating through the auxiliary clamping part and inserted into the clamping block body, the clamping block body is provided with a first limiting groove, the auxiliary clamping part is provided with a second limiting groove, and a first clamping area is defined by the first limiting groove and the second limiting groove. The balance weight adjusting mechanism comprises a balance weight base fixedly connected with the base and the clamping block base, a positioning block arranged at the top of the balance weight base, an elastic clamping block and a second locking screw. A second clamping area is formed between the first part and the second part of the elastic clamping block. The auxiliary force increasing unit comprises two auxiliary force increasing mechanisms arranged on the two sides of the clamping block base. Each auxiliary force increasing mechanism comprises a limiting base fixed to the base and an adjusting screw rotationally penetrating through the limiting base and abutting against the outer side face of the elastic clamping block. The invention further discloses a using method of the tool.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular to a tool for turning a flared elbow joint and a method for using the tool. Background Art

[0002] The flared elbow pipe joint is an important aerospace sealing pipeline component, which directly determines the overall reliability and safety of pipeline connections and oil and gas transportation equipment. Due to the complex and diverse application scenarios, the specifications and shapes of the flared elbow pipe joint parts vary, and it is a typical multi-variety, small-batch part in the aerospace field. The flared elbow pipe joint is usually a forging or casting, and its angle and diameter vary. There is a flange ring structure in the middle of the pipe joint shape. Affected by the irregular shape and angle of the parts, the flared elbow pipe joint is more difficult to clamp and manufacture than conventional pipe joints.

[0003] At present, the industry mainly uses profiling tooling or V-blocks to clamp the flared elbow joints. The clamping accuracy of the parts depends on the accuracy of the part blank itself and the manufacturing accuracy of the tooling, which makes the positioning error of the flared elbow joints large, thus affecting the processing accuracy of the flared elbow joints. In addition, the V-block clamps the workpiece by line contact, and its stability in clamping the workpiece is insufficient. The workpiece is easy to shake during the processing, thereby reducing the product processing yield. The production cost of the profiling tooling is high, and it can only be used to process products of the same model. Its scope of application is small, and it is difficult to apply to the processing of multiple varieties and small batches of parts. Summary of the invention

[0004] Based on this, it is necessary to provide a flared elbow joint turning tool and its use method with high workpiece positioning and processing accuracy, stable workpiece clamping, wide application range and low cost to address the above-mentioned shortcomings.

[0005] A flared elbow joint turning tool, comprising a base and a fixed clamping mechanism, a counterweight adjustment mechanism and an auxiliary force amplification unit fixed on the base;

[0006] The fixed clamping mechanism comprises a clamping block base fixed to the upper surface of the base, a clamping block body fixed to the upper surface of the clamping block base, an auxiliary clamping part located beside the clamping block body, a first locking screw passing through the auxiliary clamping part and inserted into the clamping block body and threadedly connected with the auxiliary clamping part and the clamping block body, a first limiting groove is provided on one side of the clamping block body adjacent to the auxiliary clamping part, a second limiting groove adjacent to the first limiting groove is provided on the auxiliary clamping part, the first limiting groove and the second limiting groove together enclose a first clamping area for clamping the workpiece tube body; the first locking screw rotates when subjected to an external torsional force to adjust the width or inner diameter of the first clamping area;

[0007] The counterweight adjustment mechanism includes a counterweight base fixed to the upper surface of the base, a positioning block fixed to the top of the counterweight base and extending toward the direction close to the clamping block base, an elastic clamping block fixed on the positioning block at one end facing away from the counterweight base, and a second locking screw, the elastic clamping block includes a first part and a second part that are relatively arranged and fixedly connected to the positioning block, the second locking screw passes through the first part and is inserted into the second part, and the second locking screw is threadedly connected to the first part and the second part, the counterweight base and the clamping block base are limitedly matched along the length direction of the clamping block base, and a second clamping area is formed between the first part and the second part, which is located obliquely above the first clamping area and is used to clamp the part of the workpiece to be turned; the second locking screw rotates when subjected to an external torsional force to adjust the width or inner diameter of the second clamping area;

[0008] The auxiliary force-enhancing unit includes two auxiliary force-enhancing mechanisms relatively arranged on both sides of the clamp block base, the auxiliary force-enhancing mechanism includes a limit base fixed on the upper surface of the base, an adjusting screw rotatably passing through the limit base and extending along the width direction of the clamp block base, and the adjusting screw is connected to the limit base screw; when the adjusting screw is subjected to external torsional force, it approaches or moves away from the outer side surface of the elastic clamp block to assist in adjusting the clamping force of the elastic clamp block on the part of the workpiece to be turned.

[0009] In one of the embodiments, the upper surface of the base is provided with a first strip guide groove and a second strip guide groove perpendicular to the first strip guide groove and connected to the first strip guide groove, the groove bottom surface of the first strip guide groove is provided with at least one first screw hole, the groove bottom surface of the second strip guide groove is provided with two second screw holes located on two opposite sides of the first strip guide groove, and the upper surface of the base is provided with two third screw holes located on two opposite sides of the first strip guide groove; the lower surface of the clamping block base is provided with a first sliding block slidably inserted into the first strip guide groove, the clamping block base is fixedly connected to the base by a first mounting screw that penetrates the upper surface of the clamping block base and is inserted into the first screw hole; the lower surface of the counterweight base is provided with a second sliding block slidably inserted into the first strip guide groove, and the counterweight base is fixedly connected to the base by a second mounting screw that penetrates the upper surface of the counterweight base and is inserted into the third screw hole; the lower surface of the limiting base is provided with a third sliding block slidably inserted into the second strip guide groove, and the limiting base is fixedly connected to the base by a third mounting screw that penetrates the upper surface of the limiting base and is inserted into the second screw hole.

[0010] In one of the embodiments, a first strip guide hole is provided on the clamp base, and a first mounting screw passes through the first strip guide hole and is inserted into the first screw hole; a second strip guide hole is provided on the counterweight base, and a second mounting screw passes through the second strip guide hole and is inserted into the third screw hole; a third strip guide hole is provided on the limiting base, and a third mounting screw passes through the third strip guide hole and is inserted into the second screw hole.

[0011] In one embodiment, a first inclined surface is provided at the top of a side surface of the clamping block body adjacent to the counterweight base, and a second inclined surface coplanar with the first inclined surface is provided at the top of a side surface of the auxiliary clamping part adjacent to the counterweight base, the first limiting groove is opened on the first inclined surface and extends obliquely, and the second limiting groove is opened on the second inclined surface and extends obliquely.

[0012] In one embodiment, the bottom of the clamp body is fixedly connected to the bottom of the auxiliary clamping part, a deformation notch is provided at the bottom of the auxiliary clamping part at the connection with the clamp body, and at least the auxiliary clamping part is made of elastic material.

[0013] In one of the embodiments, the fixed clamping mechanism also includes an elastic protective sleeve inserted into the first clamping area and used to sleeve on the workpiece tube body, the outer contour shape of the elastic protective sleeve is adapted to the inner contour shape of the first clamping area, and the inner contour shape of the elastic protective sleeve is adapted to the outer contour shape of the workpiece tube body to be clamped; the elastic protective sleeve is provided with a avoidance notch extending along the length direction of the elastic protective sleeve and passing through the upper and lower surfaces of the elastic protective sleeve.

[0014] In one of the embodiments, the counterweight adjustment mechanism also includes a fine-tuning screw that passes through the counterweight base and is threadedly connected to the counterweight base. A T-slot is provided on the lower surface of the clamp block base. The T-slot passes through a side of the clamp block base adjacent to the counterweight base. A T-shaped limit block is provided at the end of the fine-tuning screw that is embedded in the T-slot and cooperates with the clamp block base along the length direction of the clamp block base.

[0015] In one of the embodiments, a slide groove is provided on the top of the counterweight base, and a fourth sliding block is provided at the bottom of the positioning block to slide into the slide groove; a fourth strip guide hole is provided on the end of the positioning block adjacent to the counterweight base, which passes through the upper and lower surfaces of the positioning block, and the positioning block is fixedly connected to the counterweight base by a fourth mounting screw which passes through the fourth strip guide hole and is inserted into the counterweight base.

[0016] In one embodiment, a clamping gasket is provided on one side of the first part located in the second clamping area and a clamping gasket is provided on one side of the second part located in the second clamping area. The clamping gasket is fixed to the first part or the second part by a countersunk screw.

[0017] The present invention also discloses a method for using the above-mentioned flared elbow joint turning tool, which comprises the following steps:

[0018] S1. Fix the fixed clamping mechanism, the counterweight adjustment mechanism and the two auxiliary force-enhancing mechanisms on the base;

[0019] S2, fix the base on the three-jaw self-centering chuck of the automatic lathe;

[0020] S3, inserting the workpiece tube into the first clamping area of ​​the fixed clamping mechanism, and tightening the first locking screw;

[0021] S4, clamping the part of the workpiece to be turned into the second clamping area of ​​the counterweight adjustment mechanism, and locking the second locking screw to limit the rotation of the workpiece;

[0022] S5. Fine-tune the position of the fixed clamping mechanism to align the workpiece with the tool of the automatic lathe;

[0023] S6. Start the automatic lathe and perform turning on the workpiece.

[0024] The flared elbow pipe joint turning processing tooling and the use method of the present invention can limit the rotational freedom of the workpiece by cooperating with the fixed clamping mechanism and the counterweight adjustment mechanism, and has lower requirements on the accuracy of the part blank, and can be quickly positioned, thereby improving the positioning and installation accuracy and processing accuracy of the workpiece; the two auxiliary force-enhancing mechanisms on both sides of the fixed clamping mechanism assist in adjusting the clamping force of the elastic clamping block on the part of the workpiece to be turned, thereby improving the stability of the workpiece clamping, and avoiding the workpiece from shaking during the processing, which is beneficial to improving the processing yield of the workpiece; a modular structural design is adopted, and the sizes of the first clamping area and the second clamping area are adjustable, which can be suitable for pipe joint parts of different diameters, specifications, and angles. The tooling has strong versatility, can be disassembled and stored as a whole, and is convenient and quick to get on and off the line. At the same time, it can be applied to different processing equipment, with a wider range of applications. To replace products of different specifications, only some parts need to be replaced, thereby reducing the manufacturing cost of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a flared elbow pipe joint turning tool after clamping a workpiece in one embodiment of the present invention;

[0026] Figure 2 It is a schematic structural diagram of a tooling for turning a flared elbow pipe joint according to an embodiment of the present invention;

[0027] Figure 3 A top view of a tool for turning a flared elbow pipe joint in one embodiment of the present invention;

[0028] Figure 4 A bottom view of a flared elbow joint turning tool after the base is removed in one embodiment of the present invention;

[0029] Figure 5 It is a front view of a tool for turning a flared elbow pipe joint in one embodiment of the present invention;

[0030] Figure 6 It is a structural schematic diagram of a base in one embodiment of the present invention;

[0031] Figure 7It is a structural schematic diagram of a fixed clamping mechanism in one embodiment of the present invention;

[0032] Figure 8 It is a structural schematic diagram of a counterweight adjustment mechanism in one embodiment of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of an auxiliary force-increasing mechanism in one embodiment of the present invention;

[0034] Fig.10 The present invention is a flowchart of a method for using a tool for turning a flared elbow joint in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0036] Please combine Figure 1-9The present invention discloses a flared elbow joint turning tool 10 with high workpiece positioning and processing accuracy, stable workpiece clamping, wide application range and low cost. The tool includes a base 100 and a fixed clamping mechanism 200 fixed on the base 100, a counterweight adjustment mechanism 300 and an auxiliary force-enhancing unit. In this embodiment, the fixed clamping mechanism 200 and the counterweight adjustment mechanism 300 are arranged on the same straight line, and the two jointly clamp the workpiece 20 to be turned. The auxiliary force-enhancing unit is arranged on both sides of the workpiece so as to assist in adjusting the clamping force on the workpiece from both sides of the counterweight adjustment mechanism 300. The fixed clamping mechanism 200 is used to clamp the workpiece tube body (non-turning part). The fixed clamping mechanism 200 includes a clamping block base 210 fixed on the upper surface of the base 100, a clamping block body 220 fixed on the upper surface of the clamping block base 210, and an auxiliary clamping part 230 located next to the clamping block body 220, and a first locking screw 240 that passes through the auxiliary clamping part 230 and is inserted into the clamping block body 220 and is threadedly connected to the auxiliary clamping part 230 and the clamping block body 220. A first limiting groove is provided on a side of the clamping block body 220 adjacent to the auxiliary clamping part 230, and a second limiting groove adjacent to the first limiting groove is provided on the auxiliary clamping part 230. The first limiting groove and the second limiting groove together enclose a first clamping area 250 for clamping the workpiece tube body; the first locking screw 240 rotates when subjected to external torsional force to adjust the width or inner diameter of the first clamping area 250. Preferably, the first limiting groove is an arc groove of a major arc structure, and the second limiting groove is an arc groove of a minor arc structure, and the two together constitute a cylindrical first clamping area 250. In this way, after the tube body of the workpiece is inserted into the first clamping area 250, the workpiece is mainly supported by the clamping block body 220, and the auxiliary clamping part 230 is used to assist in limiting the tube body of the workpiece; when the first locking screw 240 rotates and the auxiliary clamping part 230 approaches the clamping block body 220, the inner diameter of the first clamping area 250 is reduced, so that the auxiliary clamping part 230 presses the tube body of the workpiece to achieve positioning of the workpiece tube body; when the first locking screw 240 rotates and the auxiliary clamping part 230 leaves the clamping block body 220, the inner diameter of the first clamping area 250 increases, and the restraining force of the auxiliary clamping part 230 on the workpiece tube body is reduced until the restraining force on the workpiece tube body is released, so as to remove the workpiece tube body from the first clamping area 250.

[0037] The counterweight adjustment mechanism 300 is used to realize the positioning of the part to be turned on the workpiece to prevent the workpiece from deflecting during the processing, so as to ensure the positioning accuracy and processing accuracy of the workpiece. The counterweight adjustment mechanism 300 includes a counterweight base 310 fixed on the upper surface of the base 100, a positioning block 320 fixed on the top of the counterweight base 310 and extending toward the clamping block base 210, an elastic clamping block 330 fixed on the positioning block 320 and facing away from the counterweight base 310, and a second locking screw 340. The elastic clamping block 330 includes a first part and a second part that are relatively arranged and fixedly connected to the positioning block 320, the second locking screw 340 passes through the first part and is inserted into the second part, and the second locking screw 340 is threadedly connected to the first part and the second part, the counterweight base 310 and the clamping block base 210 are limitedly matched along the length direction of the clamping block base 210, and a second clamping area 350 is formed between the first part and the second part, which is located obliquely above the first clamping area 250 and is used to clamp the part to be turned on the workpiece. The elastic clamp block 330 is made of elastic material. By slotting the block-shaped elastic material, an elastic clamp block consisting of a first part and a second part can be obtained. The first part and the second part will deform and move closer to each other under external pressure to reduce the distance between them. The positioning block 320 is a cantilever structure fixed on the top of the counterweight base 310, so that the elastic clamp block 330 is suspended above the workpiece clamped in the first clamping area 250 and positions the part to be turned on the upper part of the workpiece. The second locking screw 340 rotates when subjected to an external torsion force to adjust the width or inner diameter of the second clamping area 350, that is, when the inner side surface of the first part and the inner side surface of the second part (a surface of the first part located in the second clamping area 350 and a surface of the second part located in the second clamping area 350) are planes, the second locking screw 340 rotates and adjusts the width of the second clamping area 350, and when the inner side surface of the first part and the inner side surface of the second part are arc surfaces, the second locking screw 340 rotates and adjusts the inner diameter of the second clamping area 350. In this way, when the second locking screw 340 is rotated and moved toward the second part, the second locking screw 340 will drive the first part to deform toward the second part, so that the distance between the first part and the second part is reduced, so as to clamp the part of the workpiece to be turned together, thereby limiting the rotational freedom of the workpiece.

[0038] The auxiliary force-enhancing unit is used to assist in adjusting the clamping force of the counterweight adjustment mechanism 300 on the part to be turned on the workpiece, so as to further improve the stability of the tooling clamping the part to be turned on the workpiece, so as to avoid the vibration of the workpiece after clamping, so as to make the installation of the workpiece clamping more reliable. The auxiliary force-enhancing unit includes two auxiliary force-enhancing mechanisms 400 relatively arranged on both sides of the clamping block base 210, and the auxiliary force-enhancing mechanism 400 includes a limit base 410 fixed on the upper surface of the base 100, and an adjustment screw 420 that is rotatably inserted through the limit base 410 and extends along the width direction of the clamping block base 210. The adjustment screw 420 is screw-connected with the limit base 410, and the end of the adjustment screw 420 is adjacent to the outer side surface of the elastic clamp 330 (the side of the first part or the second part facing away from the second clamping area 350); when subjected to an external torsional force, the adjustment screw 420 approaches or moves away from the outer side surface of the elastic clamp 330 to assist in adjusting the clamping force of the elastic clamp 330 on the part to be turned on the workpiece.

[0039] The above-mentioned flared elbow pipe joint turning processing tooling can limit the rotational freedom of the workpiece by cooperating with the fixed clamping mechanism 200 and the counterweight adjustment mechanism 300, has lower requirements on the accuracy of the part blank, and can be quickly positioned, thereby improving the positioning and installation accuracy and processing accuracy of the workpiece; the two auxiliary force-enhancing mechanisms 400 on both sides of the fixed clamping mechanism 200 assist in adjusting the clamping force of the elastic clamping block 330 on the part to be turned of the workpiece, thereby improving the stability of the workpiece clamping, and avoiding the shaking of the workpiece during the processing, which is beneficial to improving the processing yield of the workpiece; a modular structural design is adopted, and the sizes of the first clamping area 250 and the second clamping area 350 are adjustable, which can be used for pipe joint parts of different diameters, specifications, and angles. The tooling has strong versatility and can be disassembled and stored as a whole. It is convenient and quick to get on and off the line. At the same time, it can be applied to different processing equipment, with a wider range of applications. To replace products of different specifications, only some parts need to be replaced, thereby reducing the manufacturing cost of the tooling.

[0040] The base 100 is used to support the remaining components so that the tooling can be clamped on the chuck of the automatic lathe as a whole. In this embodiment, the base 100 is a circular plate-like structure, and a cylindrical boss 110 is provided on the lower surface of the base 100. The cylindrical boss 110 is used to provide a mounting portion for the base 100. By clamping the cylindrical boss 110 on the three-jaw self-centering chuck of the automatic lathe, the tooling can be clamped on the automatic lathe as a whole, or the cylindrical boss 110 can be removed from the three-jaw self-centering chuck of the automatic lathe so that the tooling can be disassembled and stored as a whole, reducing the difficulty of putting the tooling on and off the line.

[0041] The upper surface of the base 100 is provided with a first strip guide groove 120 and a second strip guide groove 130 which is perpendicular to and connected to the first strip guide groove 120. The connecting portion of the first strip guide groove 120 and the second strip guide groove 130 is located at the center of the base 100, that is, the first strip guide groove 120 and the second strip guide groove 130 together form a cross groove passing through the center of the base 100. The center of the cross groove is the center of the base 100 and the chuck center of the automatic lathe, so that when the workpiece is fixed later, the part to be turned on the workpiece is centered on the base 100. In this embodiment, it is agreed that the first strip guide groove 120 extends along the X-axis direction, and the second strip guide groove 130 extends along the Y-axis direction. At least one first screw hole 140 is formed on the bottom surface of the first strip guide groove 120, two second screw holes 150 are formed on the bottom surface of the second strip guide groove 130 and are located on two opposite sides of the first strip guide groove 120, and two third screw holes 160 are formed on the upper surface of the base 100 and are located on two opposite sides of the first strip guide groove 120; a first slider 211 is formed on the lower surface of the clamping block base 210 and is slidably inserted into the first strip guide groove 120, and the clamping block base 210 is provided with a first mounting screw 212 which penetrates the upper surface of the clamping block base 210 and is inserted into the first screw hole 140. The counterweight base 310 is fixedly connected to the base 100; the lower surface of the counterweight base 310 is provided with a second slider 311 that is slidably inserted into the first strip guide groove 120, and the counterweight base 310 is fixedly connected to the base 100 by a second mounting screw 312 that penetrates the upper surface of the counterweight base 310 and is inserted into the third screw hole 160; the lower surface of the limiting base 410 is provided with a third slider 411 that is slidably inserted into the second strip guide groove 130, and the limiting base 410 is fixedly connected to the base 100 by a third mounting screw 412 that penetrates the upper surface of the limiting base 410 and is inserted into the second screw hole 150. Preferably, a first screw hole 140 is provided on both sides of the center of the base 100 in the first strip guide groove 120, and the clamping block base 210 is fixedly connected to the base 100 by two first mounting screws 212 that penetrate the upper surface of the clamping block base 210 and are inserted into the two first screw holes 140 one by one. In this embodiment, through the sliding limit cooperation between the first slider 211 and the first strip guide groove 120, the sliding limit cooperation between the second slider 311 and the first strip guide groove 120, and the sliding limit cooperation between the third slider 411 and the second strip guide groove 130, the guidance of the sliding process of the clamping block base 210, the counterweight base 310 and the limit base 410 is achieved, so that the three can only move along a preset path during the position adjustment process, thereby ensuring the reliability of the position adjustment of the clamping block base 210, the counterweight base 310 and the limit base 410.During the process of adjusting the positions of the clamping block base 210, the counterweight base 310 and the limiting base 410, the positions of the clamping block base 210 and the counterweight base 310 can be adjusted along the first strip guide groove 120, and the position of the limiting base 410 can be adjusted along the second strip guide groove 130, and then the corresponding mounting screws are tightened to achieve the positioning of the clamping block base 210, the counterweight base 310 and the limiting base 410.

[0042] Further, in this embodiment, the clamping block base 210 is provided with a first strip guide hole 213, and the first mounting screw 212 passes through the first strip guide hole 213 and is inserted into the first screw hole 140; the counterweight base 310 is provided with a second strip guide hole 313, and the second mounting screw 312 passes through the second strip guide hole 313 and is inserted into the third screw hole 160; the limiting base 410 is provided with a third strip guide hole 413, and the third mounting screw 412 passes through the third strip guide hole 413 and is inserted into the second screw hole 150. The length direction of the third strip guide hole 413 is the Y-axis direction. By opening a first strip guide hole 213 on the clamp block base 210, a second strip guide hole 313 on the counterweight base 310, and a third strip guide hole 413 on the limit base 410, during the installation process of the clamp block base 210, the counterweight base 310 and the limit base 410, after the first mounting screw 212, the second mounting screw 312 and the third mounting screw 412 are passed through the corresponding strip guide holes and inserted into the corresponding screw holes, the mounting screws may not be tightened temporarily, and after the position of the clamp block base 210, the counterweight base 310 and the limit base 410 are fine-tuned, the corresponding mounting screws are tightened again, so as to ensure the stability of the tooling structure and adapt to the clamping of workpieces of different sizes and models. Further preferably, the length direction of the first strip guide hole 213 and the second strip guide hole 313 is the X-axis direction, so as to fine-tune the position of the fixed clamping mechanism 200 and the counterweight adjustment mechanism 300 along the X-axis direction, and fine-tune the position of the auxiliary force-enhancing mechanism 400 along the Y-axis direction.

[0043] In addition, the counterweight adjustment mechanism 300 further includes a fine-tuning screw 360 that penetrates the counterweight base 310 and is threadedly connected to the counterweight base 310. A threaded hole for penetrating the fine-tuning screw 360 is provided at the lower portion of the counterweight base 310. A T-slot 214 is provided on the lower surface of the clamping block base 210. The T-slot 214 penetrates a side of the clamping block base 210 adjacent to the counterweight base 310. A T-shaped stopper 361 is provided at the end of the fine-tuning screw 360, which is embedded in the T-slot 214 and is limitedly matched with the clamping block base 210 along the length direction of the clamping block base 210. By providing the T-slot 214 on the lower surface of the clamping block base 210 and providing the T-shaped stopper 361 at the end of the fine-tuning screw 360, while achieving the limit of the fine-tuning screw 360 and the clamping block base 210 along the X-axis direction, the normal rotation of the fine-tuning screw 360 under the action of an external torsion force is ensured, so that the fine-tuning screw 360 can drive the clamping block base 210 to adjust its position. By setting the fine-tuning screw 360, before installing the fixed clamping mechanism 200, first fix the position of the breeding base 100 and lock the second mounting screw 312, then, without locking the first mounting screw 212 on the clamping block base 210, rotate the fine-tuning screw 360 so that the fine-tuning screw 360 drives the clamping block base 210 to move along the length direction (X-axis direction) of the first strip guide groove 120, so that the clamping block base 210 moves to the part to be turned on the workpiece to align with the center of the base 100, and then lock the first mounting screw 212. In this way, by rotating the fine-tuning screw 360, the center of the part to be removed of the workpiece can be adjusted according to the needs of workpieces of different specifications, and the alignment of the workpiece is more convenient and quick, and the tooling accuracy is higher.

[0044] In one embodiment, a first inclined surface is provided at the top of the clamping block body 220 adjacent to a side of the counterweight base 310, a second inclined surface coplanar with the first inclined surface is provided at the top of the auxiliary clamping portion 230 adjacent to a side of the counterweight base 310, a first limiting groove is provided on the first inclined surface and extends obliquely, and a second limiting groove is provided on the second inclined surface and extends obliquely. In this way, the central axis of the first clamping area 250 and the central axis of the second clamping area 350 are set at an angle to adapt to the shape of the flared elbow joint. In practical applications, a plurality of fixed clamping mechanisms 200 with first and second inclined surfaces having different inclination angles can be provided, that is, a plurality of fixed clamping mechanisms 200 with first clamping areas 250 having different inclination angles are designed to adapt to the clamping of workpieces of different angle specifications. Further, the bottom of the clamping block body 220 is fixedly connected to the bottom of the auxiliary clamping portion 230, and the bottom of the auxiliary clamping portion 230 is provided with a deformation notch 231 at the connection with the clamping block body 220, and at least the auxiliary clamping portion 230 is made of elastic material. In this embodiment, the clamp block body 220 and the auxiliary clamping part 230 are both made of elastic material, for example, a metal material with a small elastic modulus (such as steel or aluminum). In addition, in this embodiment, the clamp block base 210, the clamp block body 220 and the auxiliary clamping part 230 are integrally formed, and the mounting block can be slotted from the top of the mounting block with an oblique through hole on one side to obtain the clamp block body 220 and the auxiliary clamping part 230 located on both sides of the slot body. By providing a deformation notch 231 at the bottom of the auxiliary clamping part 230 at the connection with the clamp block body 220, the deformation ability of the auxiliary clamping part 230 to move closer to or away from the clamp block body 220 can be improved, so as to reduce the difficulty of adjusting the size of the first clamping area 250, thereby reducing the difficulty of clamping the workpiece.

[0045] In one embodiment, the fixed clamping mechanism 200 also includes an elastic protective sleeve 260 inserted into the first clamping area 250 and used to sleeve the workpiece tube body. The outer contour shape of the elastic protective sleeve 260 is adapted to the inner contour shape of the first clamping area 250, and the inner contour shape of the elastic protective sleeve 260 is adapted to the outer contour shape of the workpiece tube body to be clamped; the elastic protective sleeve 260 is provided with a avoidance notch 261 extending along the length direction of the elastic protective sleeve 260 and penetrating the upper and lower surfaces of the elastic protective sleeve 260. Further, the hardness of the elastic protective sleeve 260 is less than the hardness of the workpiece 20 to be turned to avoid the inner surface of the first clamping area 250 from scratching or bumping the outer surface of the workpiece. Preferably, the elastic protective sleeve 260 is made of low carbon steel or aluminum alloy. By providing the elastic protective sleeve 260, the clamping contact surface of the fixed clamping mechanism 200 on the workpiece is further increased, and the workpiece clamping accuracy is higher, thereby ensuring a more stable processing accuracy. The elastic protective sleeve 260 is provided with a relief notch 261, which improves the deformation ability of the elastic protective sleeve 260, so that it can better fit the surface of the product to be processed, thereby improving the stability of the tooling to clamp the product. In addition, by providing the relief notch 261 on the elastic protective sleeve 260, it can also be applied to the clamping of pipe joint parts with different angles but the same diameter. In addition, in practical applications, multiple elastic protective sleeves 260 with different inner diameters can be designed to achieve clamping protection for workpieces with different diameter specifications, thereby expanding the scope of application of the tooling.

[0046] In one embodiment, a slide groove 314 is provided on the top of the counterweight base 310, and a fourth slider 321 is provided at the bottom of the positioning block 320 to be slidably inserted into the slide groove 314; a fourth strip guide hole 322 is provided on one end of the positioning block 320 adjacent to the counterweight base 310, penetrating the upper and lower surfaces of the positioning block 320, and the positioning block 320 is fixedly connected to the counterweight base 310 by a fourth mounting screw 323 that penetrates the fourth strip guide hole 322 and is inserted into the counterweight base 310. In this way, the position of the positioning block 320 along the X-axis direction can be finely adjusted through the cooperation of the fourth strip guide hole 322 and the fourth mounting screw 323, so that the counterweight adjustment mechanism 300 can adapt to the clamping of workpieces of different models, shapes and sizes. By arranging a fourth slider 321 at the bottom of the positioning block 320 and arranging a slide groove 314 at the top of the counterweight base 310, the positioning block 320 is guided by the sliding cooperation between the fourth slider 321 and the slide groove 314, so as to avoid the positioning block 320 from shaking when sliding the adjustment position, and at the same time limit the range of the position adjustment of the positioning block 320 along the X-axis direction. It should be noted that, in this embodiment, the central axis of the slide groove 314 along the X-axis direction, the central axis of the counterweight base 310 along the X-axis direction, and the central axis of the first strip guide groove 120 along the X-axis direction are collinear, so as to reduce the difficulty of alignment and installation of the counterweight adjustment mechanism 300. Preferably, in this embodiment, a sink groove 315 is provided on the upper surface of the counterweight base 310, and the slide groove 314 is provided on the bottom surface of the sink groove 315, so as to receive the screw head of the fourth mounting screw 323 in the sink groove 315, so as to avoid the screw head of the fourth mounting screw 323 from interfering with the external structure.

[0047] In one embodiment, the inner surface of the elastic clamp block 330 (one side of the first part located at the second clamping area 350 and one side of the second part located at the second clamping area 350) is provided with a limiting structure 331 at a position adjacent to the positioning block 320, and the second locking screw 340 passes through the first part and a limiting structure 331 and is inserted into the limiting structure 331 on the second part, and there is a preset distance between the two limiting structures 331. By providing the limiting structure 331 on the elastic clamp block 330, on the one hand, the strength of the installation position of the second locking screw 340 on the elastic clamp block 330 is increased to avoid breakage or damage at the position, thereby extending the service life of the counterweight adjustment mechanism 300; on the other hand, by the preset distance between the two limiting structures 331, the maximum degree of mutual closeness between the first part and the second part can be limited to avoid damage to the elastic clamp block 330 due to excessive deformation. In order to expand the applicable scenarios of the tooling, in one embodiment, a clamping gasket 332 is provided on one side of the first part located in the second clamping area 350 and a clamping gasket 332 is fixed to the first part or the second part by a countersunk screw 333. Further preferably, a mounting notch is provided on the inner surface of the elastic clamp block 330, and the clamping gasket 332 is embedded in the mounting notch and connected to the elastic clamp screw. In this way, a plurality of clamping gaskets 332 of different thickness specifications can be designed. In this way, when clamping workpieces of different models (expansion elbow joints), clamping gaskets 332 of different thicknesses can be replaced to further adjust the width of the second clamping area 350, so as to adapt to the clamping of workpieces of different models, different outer diameters or different thicknesses.

[0048] The above-mentioned flared elbow pipe joint turning tool 10 clamps the pipe body of the workpiece through the fixed clamping mechanism 200, and the rotational freedom of the workpiece can be limited by the counterweight adjustment mechanism 300. The two auxiliary force-enhancing mechanisms 400 on both sides of the fixed clamping mechanism 200 assist in adjusting the clamping force of the elastic clamp block 330 on the part of the workpiece to be turned, thereby improving the stability of the workpiece clamping. Since a cross slot passing through the center of the base 100 is provided on the base 100, the end of the workpiece to be processed after clamping is just on the center of the spindle of the lathe, and the turning of the workpiece can be easily completed by fine-tuning with 12 screws. The tool can be applied to ordinary lathes, CNC lathes, CNC machining centers and other equipment to complete the processing of flared elbow pipe joints of various specifications.

[0049] Please combine Figure 1-10 The present invention also discloses a method 30 for using the above-mentioned flared elbow joint turning tool, the method comprising the following steps:

[0050] S1, fixing the fixing clamping mechanism 200, the counterweight adjustment mechanism 300 and the two auxiliary force amplification mechanisms 400 on the base 100;

[0051] S2, fixing the base 100 on the three-jaw self-centering chuck of the automatic lathe;

[0052] S3, inserting the workpiece tube into the first clamping area 250 of the fixed clamping mechanism 200, and tightening the first locking screw 240;

[0053] S4, clamping the part of the workpiece to be turned into the second clamping area 350 of the counterweight adjustment mechanism 300, and locking the second locking screw 340 to limit the rotation of the workpiece;

[0054] S5, fine-adjusting the position of the fixed clamping mechanism 200 to align the workpiece with the tool of the automatic lathe;

[0055] S6. Start the automatic lathe and perform turning on the workpiece.

[0056] Furthermore, in this embodiment, the clamping block base 210 of the fixed clamping mechanism 200, the counterweight base 310 of the counterweight adjustment mechanism 300, and the limiting base 410 of the auxiliary force amplification mechanism 400 are all provided with strip guide holes, and the clamping block base 210, the counterweight base 310, and the limiting base 410 are all fixedly connected to the base 100 by mounting screws penetrating the strip guide holes. In addition, a fine-tuning screw 360 is threadedly connected to the counterweight base 310, and the fine-tuning screw 360 is limitedly matched with the clamping block base 210 along the X-axis direction, so that when the fine-tuning screw 360 rotates, the clamping block base 210 can move relative to the counterweight base 310 along the X-axis direction to adjust the center of the part to be turned on the workpiece.

[0057] It should be noted that the method for using the flared elbow joint turning tool of the present invention is directed to a flared elbow joint turning tool having the same structure as the aforementioned flared elbow joint turning tool, and the details can be referred to the previous description, which will not be repeated here. The method for using the flared elbow joint turning tool is specifically described below in conjunction with the structure of the flared elbow joint turning tool.

[0058] During the use of the flared elbow joint turning tooling, the counterweight adjustment mechanism 300 is first installed on the base 100. Specifically, the second slider 311 on the lower surface of the counterweight base 310 is inserted into the first strip guide groove 120, and the second mounting screw 312 is passed through the second strip guide hole 313 on the counterweight base 310 and inserted into the third screw hole 160. The second mounting screw 312 is locked, and the central axis of the counterweight base 310 coincides with the central axis of the base 100, so that the workpiece alignment and installation are more convenient. At this time, the positioning block 320 and the elastic clamp block 330 are not installed on the counterweight base 310 to prevent the elastic clamp block 330 from interfering with the clamping of the workpiece.

[0059] Secondly, the fixed clamping mechanism 200 is installed on the base 100. Specifically, the first slider 211 on the lower surface of the clamping block base 210 is inserted into the first strip guide groove 120, the first mounting screw 212 is passed through the first strip guide hole 213 on the clamping block base 210 and inserted into the first screw hole 140, and the fine-tuning screw 360 on the counterweight base 310 is connected to the clamping block base 210. At this time, the first mounting screw 212 and the first locking screw 240 are not locked, and the elastic protective cover 260 is not installed in the first clamping area 250.

[0060] Then, the two auxiliary force-enhancing mechanisms 400 are relatively arranged on both sides of the clamp block base 210, so that the third slider 411 on the lower surface of the limiting base 410 is inserted into the second strip guide groove 130, and the third mounting screw 412 passes through the third strip guide hole 413 on the limiting base 410 and is inserted into the second screw hole 150, and the third mounting screw 412 is locked. At this time, the adjusting screw 420 can be temporarily not installed, or the adjusting screw 420 can be adjusted to a loose state (so that the end of the adjusting screw 420 is away from the outer side of the elastic clamp block 330) to avoid scratches on the product due to direct contact between the adjusting screw 420 and the product, or the product is difficult to place in the second installation area due to the adjusting screw 420 squeezing the elastic clamp block 330.

[0061] After the tooling is assembled, the base 100 is installed on the three-jaw chuck of the automatic lathe, and then the workpiece is installed. When installing the workpiece, first wrap the elastic protective cover 260 around the ring side of the workpiece tube body to be processed, insert the workpiece tube body into the first clamping area 250, and pre-tighten the workpiece by turning the first locking screw 240 (the first locking screw 240 is not locked at this time, so as to provide conditions for fine-tuning the position of the workpiece when it is loaded into the second clamping area 350). The positioning block 320 is fixed to the top of the counterweight base 310 by the fourth mounting screw 323, so that the part to be turned on the workpiece enters the second clamping area 350, and then tighten the second locking screw 340 to limit the rotational freedom of the workpiece, and tighten the first locking screw 240 at the same time.

[0062] After the workpiece is installed, the fine adjustment screw 360 is rotated to drive the clamping block base 210 to move through the fine adjustment screw 360 so that the workpiece is centered, and then the first mounting screw 212 is locked to limit the position of the clamping block base 210. At the same time, the position of the auxiliary force amplification mechanism 400 relative to the workpiece can be finely adjusted by loosening the third mounting screw 412 and adjusting the position of the limit base 410, and then locking the third mounting screw 412. Finally, the machine tool is started to turn the workpiece.

[0063] The method of using the above-mentioned flared elbow pipe joint turning processing tooling can limit the rotational freedom of the workpiece by cooperating with the fixed clamping mechanism 200 and the counterweight adjustment mechanism 300, and has lower requirements on the accuracy of the part blank, and can be quickly positioned, thereby improving the positioning and installation accuracy and processing accuracy of the workpiece; the two auxiliary force-enhancing mechanisms 400 on both sides of the fixed clamping mechanism 200 assist in adjusting the clamping force of the elastic clamping block 330 on the part to be turned of the workpiece, thereby improving the stability of the workpiece clamping, and avoiding the workpiece from shaking during the processing, which is beneficial to improving the processing yield of the workpiece; a modular structure design is adopted, and the sizes of the first clamping area 250 and the second clamping area 350 are adjustable, which can be used for pipe joint parts of different diameters, specifications, and angles. The tooling has strong versatility, can be disassembled and stored as a whole, and is convenient and quick to get on and off the line. At the same time, it can be applied to different processing equipment, with a wider range of applications. To replace products of different specifications, only some parts need to be replaced, thereby reducing the manufacturing cost of the tooling.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A tool for turning a flared elbow joint, characterized in that: It includes a base and a fixed clamping mechanism, a counterweight adjustment mechanism and an auxiliary force-increasing unit fixed on the base; The fixed clamping mechanism comprises a clamping block base fixed to the upper surface of the base, a clamping block body fixed to the upper surface of the clamping block base, an auxiliary clamping part located beside the clamping block body, a first locking screw passing through the auxiliary clamping part and inserted into the clamping block body and threadedly connected with the auxiliary clamping part and the clamping block body, a first limiting groove is provided on one side of the clamping block body adjacent to the auxiliary clamping part, a second limiting groove adjacent to the first limiting groove is provided on the auxiliary clamping part, the first limiting groove and the second limiting groove together enclose a first clamping area for clamping the workpiece tube body; the first locking screw rotates when subjected to an external torsional force to adjust the width or inner diameter of the first clamping area; The counterweight adjustment mechanism includes a counterweight base fixed to the upper surface of the base, a positioning block fixed to the top of the counterweight base and extending toward the direction close to the clamping block base, an elastic clamping block fixed on the positioning block at one end facing away from the counterweight base, and a second locking screw, the elastic clamping block includes a first part and a second part that are relatively arranged and fixedly connected to the positioning block, the second locking screw passes through the first part and is inserted into the second part, and the second locking screw is threadedly connected to the first part and the second part, the counterweight base and the clamping block base are limitedly matched along the length direction of the clamping block base, and a second clamping area is formed between the first part and the second part, which is located obliquely above the first clamping area and is used to clamp the part of the workpiece to be turned; the second locking screw rotates when subjected to an external torsional force to adjust the width or inner diameter of the second clamping area; The auxiliary force-enhancing unit includes two auxiliary force-enhancing mechanisms relatively arranged on both sides of the clamp block base, the auxiliary force-enhancing mechanism includes a limit base fixed on the upper surface of the base, an adjusting screw rotatably passing through the limit base and extending along the width direction of the clamp block base, and the adjusting screw is connected to the limit base screw; when the adjusting screw is subjected to external torsional force, it approaches or moves away from the outer side surface of the elastic clamp block to assist in adjusting the clamping force of the elastic clamp block on the part of the workpiece to be turned.

2. The flared elbow joint turning tool according to claim 1, characterized in that: The top surface of the base is provided with a first strip guide groove and a second strip guide groove perpendicular to the first strip guide groove and connected to the first strip guide groove, and at least one first screw hole is provided on the bottom surface of the first strip guide groove, and two second screw holes are provided on the bottom surface of the second strip guide groove, and two third screw holes are provided on the upper surface of the base, and are located on the two opposite sides of the first strip guide groove; the lower surface of the clamping block base is provided with a first sliding block that is slidably inserted into the first strip guide groove, and the clamping block base is fixedly connected to the base by a first mounting screw that penetrates the upper surface of the clamping block base and is inserted into the first screw hole; the lower surface of the counterweight base is provided with a second sliding block that is slidably inserted into the first strip guide groove, and the counterweight base is fixedly connected to the base by a second mounting screw that penetrates the upper surface of the counterweight base and is inserted into the third screw hole; the lower surface of the limiting base is provided with a third sliding block that is slidably inserted into the second strip guide groove, and the limiting base is fixedly connected to the base by a third mounting screw that penetrates the upper surface of the limiting base and is inserted into the second screw hole.

3. The flared elbow joint turning tool according to claim 2, characterized in that: A first strip guide hole is provided on the clamp base, and a first mounting screw passes through the first strip guide hole and is inserted into the first screw hole; a second strip guide hole is provided on the counterweight base, and a second mounting screw passes through the second strip guide hole and is inserted into the third screw hole; a third strip guide hole is provided on the limiting base, and a third mounting screw passes through the third strip guide hole and is inserted into the second screw hole.

4. The flared elbow joint turning tool according to claim 1, characterized in that: A first inclined surface is provided at the top of a side surface of the clamping block body adjacent to the counterweight base, and a second inclined surface coplanar with the first inclined surface is provided at the top of a side surface of the auxiliary clamping part adjacent to the counterweight base. The first limiting groove is opened on the first inclined surface and extends obliquely, and the second limiting groove is opened on the second inclined surface and extends obliquely.

5. The flared elbow joint turning tool according to claim 1, characterized in that: The bottom of the clamping block body is fixedly connected to the bottom of the auxiliary clamping part. The bottom of the auxiliary clamping part is provided with a deformation notch at the connection with the clamping block body, and at least the auxiliary clamping part is made of elastic material.

6. The tooling for turning the flared elbow joint according to claim 1, characterized in that: The fixed clamping mechanism also includes an elastic protective sleeve inserted into the first clamping area and used to sleeve on the workpiece tube body, the outer contour shape of the elastic protective sleeve is adapted to the inner contour shape of the first clamping area, and the inner contour shape of the elastic protective sleeve is adapted to the outer contour shape of the workpiece tube body to be clamped; the elastic protective sleeve is provided with a avoidance notch extending along the length direction of the elastic protective sleeve and penetrating the upper and lower surfaces of the elastic protective sleeve.

7. The tooling for turning the flared elbow joint according to claim 1, characterized in that: The counterweight adjustment mechanism also includes a fine-tuning screw that passes through the counterweight base and is threadedly connected to the counterweight base. A T-slot is provided on the lower surface of the clamp block base. The T-slot passes through a side of the clamp block base adjacent to the counterweight base. A T-shaped limit block is provided at the end of the fine-tuning screw that is embedded in the T-slot and cooperates with the clamp block base along the length direction of the clamp block base.

8. The tooling for turning the flared elbow joint according to claim 1, characterized in that: A slide groove is provided at the top of the counterweight base, and a fourth sliding block is provided at the bottom of the positioning block for sliding into the slide groove; a fourth strip guide hole is provided at one end of the positioning block adjacent to the counterweight base, passing through the upper and lower surfaces of the positioning block, and the positioning block is fixedly connected to the counterweight base by a fourth mounting screw which passes through the fourth strip guide hole and is inserted into the counterweight base.

9. The tooling for turning the flared elbow joint according to claim 1, characterized in that: One side of the first part located in the second clamping area and one side of the second part located in the second clamping area are both provided with clamping washers, and the clamping washers are fixed to the first part or the second part by countersunk screws.

10. A method for using the flared elbow joint turning tool as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Fix the fixed clamping mechanism, the counterweight adjustment mechanism and the two auxiliary force-enhancing mechanisms on the base; S2, fix the base on the three-jaw self-centering chuck of the automatic lathe; S3, inserting the workpiece tube into the first clamping area of ​​the fixed clamping mechanism, and tightening the first locking screw; S4, clamping the part of the workpiece to be turned into the second clamping area of ​​the counterweight adjustment mechanism, and locking the second locking screw to limit the rotation of the workpiece; S5. Fine-tune the position of the fixed clamping mechanism to align the workpiece with the tool of the automatic lathe; S6. Start the automatic lathe and perform turning on the workpiece.

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