Turning tool for machining appearance of thin-wall workpiece

Abstract

The turning tool comprises a four-jaw chuck, four clamping jaws, a workpiece, an installation groove and a supporting mechanism, the four clamping jaws are all installed on the four-jaw chuck in a sliding mode and distributed in an annular array mode, the workpiece is located among the four clamping jaws and makes close contact with the four clamping jaws, and the supporting mechanism is located between the four clamping jaws. A mounting groove is formed in the four-jaw chuck, and the supporting mechanism is arranged in the mounting groove. The clamp is reasonable in design and good in practicability, the inner wall of a workpiece can be supported and reinforced, stress deformation of the workpiece during machining is avoided, then the machining precision is improved, various workpieces can be clamped and fixed by controlling extension and contraction of the four ejector rods, the application range is widened, the production cost is reduced, and the machining efficiency is improved. And the mounting pipe can be conveniently mounted and dismounted, so that internal parts can be conveniently overhauled and replaced, the service life of the device is prolonged, and the expenditure is further saved.

Description

Technical Field

[0001] The utility model relates to the technical field of turning tooling, in particular to a turning tooling for machining the outer shape of thin-walled workpieces. Background Technique

[0002] At present, most CNC lathes use a three-jaw chuck as the clamping mechanism. When the bevel gear is rotated by a three-jaw chuck wrench, the flat compass is driven to rotate. The flat compass meshes with the movable jaws, so that the three movable jaws move towards the center at the same time, thus clamping the workpiece. However, several problems will occur in the actual machining process: (1) During the machining of some parts, due to the clamping position of the jaws, it may hinder the tool feed and affect the continuity of machining; (2) For some thin-walled parts, if the jaws are directly used for clamping, the parts themselves cannot withstand the clamping force and may be deformed, affecting the machining accuracy; (3) If machining is carried out when the parts are not clamped, the axial force applied by the tool may cause the parts to fly out; (4) When turning the outer shape of thin-walled parts, since the inside of the parts is hollow and the wall is thin, it is easy to be unable to withstand the turning force, resulting in damage to the parts or tool breakage, which is also harmful to the lathe itself.

[0003] In view of the above problems, a turning tooling for machining the outer shape of thin-walled workpieces disclosed in the Chinese patent with the publication number CN213496505U has the following technical key points: It includes a three-jaw chuck for clamping the clamping body and a clamping body for clamping the workpiece to be machined. Three jaws are movably arranged on the three-jaw chuck and the three jaws can clamp or release the clamping body. A positioning area is formed between the positioning ends on the three jaws. The fixed end of the clamping body is a cylindrical structure, and the fixed end is located in the fixed area. The clamping end of the clamping body is a conical structure. An internal thread is provided on the workpiece to be machined, and a locking external thread matching the internal thread is provided on the clamping end. The clamping body is threadedly connected to the workpiece to be machined.

[0004] The above solution is found to still have at least the following defects in actual operation: This device is only applicable to turning and machining a certain workpiece with a specific size, and does not have wide applicability to workpieces of other sizes, which easily leads to an increase in production costs. Therefore, we propose a turning tooling for machining the outer shape of thin-walled workpieces to solve the above problems. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the utility model provides a turning tooling for machining the outer shape of thin-walled workpieces, which solves the problems that the device is only applicable to turning and machining a certain workpiece with a specific size, does not have wide applicability to workpieces of other sizes, and easily leads to an increase in production costs.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A turning tooling for machining the outer shape of thin-walled workpieces, including a four-jaw chuck, four jaws, a workpiece, an installation groove and a support mechanism. The four jaws are all slidably installed on the four-jaw chuck and are distributed in a circular array. The workpiece is located between the four jaws and is in close contact with the four jaws. An installation groove is provided on the four-jaw chuck, and the support mechanism is arranged in the installation groove. The support mechanism is used to support and reinforce the inner wall of the workpiece.

[0007] Preferably, the support mechanism includes an installation pipe, two sealing plates, a micro motor, a rotating shaft, a turntable, four wedge-shaped blocks, four ejector rods and four connecting blocks. The installation pipe is movably installed in the installation groove. The two sealing plates are respectively fixedly installed at the front and rear ends of the installation pipe. The micro motor is fixedly installed in the installation pipe. The rotating shaft is fixedly installed at the output shaft end of the micro motor. The front end of the rotating shaft is rotatably connected to the corresponding sealing plate. The turntable is fixedly sleeved on the rotating shaft. The four wedge-shaped blocks are all fixedly installed on the turntable and are distributed in a circular array. The four ejector rods are all slidably installed on the installation pipe and are distributed in a circular array. The four connecting blocks are respectively fixedly installed at one end of the four ejector rods close to each other. The four connecting blocks are respectively in sliding contact with the corresponding wedge-shaped blocks. One end of the four ejector rods away from each other extends outside the installation pipe and is in close contact with the inner wall of the workpiece.

[0008] Preferably, springs are slidably installed on the four ejector rods. One end of the four springs close to each other is respectively fixedly connected to the four connecting blocks. One end of the four springs away from each other is respectively fixedly connected to the inner wall of the installation pipe.

[0009] Preferably, internal threads are provided on the inner wall of the installation groove, and a connecting pipe is threadedly installed in the installation groove. The connecting pipe is fixedly sleeved on the installation pipe.

[0010] Preferably, the front end of the installation pipe is flush with the front sides of the four jaws.

[0011] Preferably, a fixing block is fixedly installed on the rear side of the rear sealing plate.

[0012] The present utility model provides a turning tooling for machining the outer shape of thin-walled workpieces. It has the following beneficial effects:

[0013] (1). For the turning tooling for machining the outer shape of thin-walled workpieces, by using the support mechanism composed of an installation pipe, two sealing plates, a micro motor, a rotating shaft, a turntable, four wedge-shaped blocks, four ejector rods and four connecting blocks, the inner wall of the workpiece can be supported and reinforced, avoiding the workpiece from deforming under force during machining, thereby improving the machining accuracy. And by controlling the extension and contraction of the four ejector rods, various workpieces can be clamped and fixed, expanding the scope of application and reducing the production cost.

[0014] (2) The turning tooling for machining the outer shape of thin-walled workpieces can facilitate the installation and disassembly of the installation pipe by utilizing the combined action of the connecting pipe and the fixing block, thereby facilitating the maintenance and replacement of internal components and extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 is a sectional structural schematic diagram of the front view of the present invention;

[0017] Figure 3 is a sectional structural schematic diagram of the side view of the present invention;

[0018] Figure 4 is Figure 3 an enlarged schematic diagram of part A in

[0019] In the figure: 1, four-jaw chuck; 2, jaw; 3, workpiece; 4, installation groove; 5, installation pipe; 6, plugging plate; 7, micro motor; 8, rotating shaft; 9, turntable; 10, wedge block; 11, ejector rod; 12, connecting block; 13, spring; 14, connecting pipe; 15, fixing block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Such as Figures 1-4As shown in the figure, the present utility model provides a technical solution: a turning tooling for machining the outer shape of thin-walled workpieces, including a four-jaw chuck 1, four jaws 2, a workpiece 3, a mounting groove 4 and a support mechanism. The four jaws 2 are all slidably mounted on the four-jaw chuck 1 and are distributed in a circular array. The workpiece 3 is located between the four jaws 2 and is in close contact with the four jaws 2. The four-jaw chuck 1 is provided with a mounting groove 4. The support mechanism is arranged in the mounting groove 4 and is used for supporting and strengthening the inner wall of the workpiece 3. The above-mentioned support mechanism includes a mounting tube 5, two sealing plates 6, a micro motor 7, a rotating shaft 8, a turntable 9, four wedge-shaped blocks 10, four ejector rods 11 and four connecting blocks 12. The mounting tube 5 is movably mounted in the mounting groove 4. The two sealing plates 6 are respectively fixedly mounted at the front and rear ends of the mounting tube 5. The left sealing plate 6 is used for supporting the rotating shaft 8 to rotate, and the right sealing plate 6 is used for mounting a fixing plate 15. The micro motor 7 is fixedly mounted in the mounting tube 5 and is used for driving the rotating shaft 8 to rotate. It should be noted that the micro motor 7 is a forward and reverse motor. The rotating shaft 8 is fixedly mounted at the output shaft end of the micro motor 7 and is used for driving the turntable 9 to rotate. The front end of the rotating shaft 8 is rotatably connected to the corresponding sealing plate 6. The turntable 9 is fixedly sleeved on the rotating shaft 8. The four wedge-shaped blocks 10 are all fixedly mounted on the turntable 9 and are distributed in a circular array. The four ejector rods 11 are all slidably mounted on the mounting tube 5 and are distributed in a circular array. The four connecting blocks 12 are respectively fixedly mounted at one ends of the four ejector rods 11 close to each other. The four connecting blocks 12 are respectively in sliding contact with the corresponding wedge-shaped blocks 10. By using the common action of the four connecting blocks 12 and the corresponding wedge-shaped blocks 10, the four ejector rods 11 can be controlled to move away from each other to support and strengthen the inner wall of the workpiece 3. One ends of the four ejector rods 11 moving away from each other all extend outside the mounting tube 5 and are in close contact with the inner wall of the workpiece 3.

[0022] In this embodiment, the front end of the above-mentioned mounting tube 5 is flush with the front sides of the four jaws 2, which can avoid damage to the mounting tube 5 by the machining tool. A fixing block 15 is fixedly mounted on the rear side of the rear sealing plate 6. The fixing block 15 is used to conveniently control the rotation of the connecting pipe 14, and thus facilitate the disassembly and installation of the mounting tube 5 of the installation box. Springs 13 are slidably mounted on the four ejector rods 11. One ends of the four springs 13 close to each other are respectively fixedly connected to the four connecting blocks 12. One ends of the four springs 13 away from each other are all fixedly connected to the inner wall of the mounting tube 5. The four springs 13 are used to push the four ejector rods 11 to rebound to the initial position when the fixation of the workpiece 3 is released, so as to avoid scratching the inner wall of the workpiece 3. Internal threads are provided on the inner wall of the mounting groove 4. A connecting pipe 14 is threadedly mounted in the mounting groove 4. The connecting pipe 14 is fixedly sleeved on the mounting tube 5.

[0023] In this embodiment, a control switch is installed on the console. The four-jaw chuck 1, the micro motor 7 and the control switch are electrically connected to an external power supply wire in sequence through wires to form a circuit. The control switch can respectively control the start and stop of the four-jaw chuck 1 and the micro motor 7.

[0024] With the above structure, a turning tooling for machining the outer shape of thin-walled workpieces provided by the utility model can support and reinforce the inner wall of the workpiece 3, avoid the deformation of the workpiece 3 due to force during machining, thereby improving the machining accuracy. By controlling the extension and contraction of the four ejector rods 11, various workpieces can be clamped and fixed, expanding the scope of application, reducing the production cost, and also facilitating the installation and disassembly of the installation pipe 5, thereby facilitating the maintenance and replacement of the internal components, prolonging the service life of the device, and further saving expenses. During specific use, the workpiece 3 to be machined is placed between the four jaws 2, the four-jaw chuck 1 is controlled to contract, and the four-jaw chuck 1 controls the four jaws 2 to clamp and fix the workpiece 3. Then, the micro-motor 7 is controlled to rotate forward, and the micro-motor 7 drives the rotating shaft 8 to rotate, thereby driving the four wedge blocks 10 to rotate. By utilizing the combined action of the four connecting blocks 12 and the corresponding wedge blocks 10, the four ejector rods 11 can be controlled to move away from each other to support and reinforce the inner wall of the workpiece 3. At this time, the four springs 13 are compressed by the four connecting blocks 12, and then the machining tool is controlled to machine the workpiece 3. When the machining of the workpiece 3 is completed, the micro-motor 7 is controlled to rotate in reverse, so that the four wedge blocks 10 move away from the four ejector rods. Under the push of the four springs 13, the four ejector rods 11 return to the initial position, avoiding scratching the inner wall of the workpiece 3 at the ends where the four ejector rods 11 move away from each other. By controlling the approach and separation of the four ejector rods 11, the size range of the workpiece 3 to be machined is expanded, avoiding the purchase of multiple pieces of equipment and reducing the production cost.

[0025] The above is only the specific implementation manner of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope recorded in the utility model can easily think of changes or substitutions, which should all be covered by the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claimed rights.

Claims

1. A turning tool for machining the shape of a thin-walled workpiece, characterized in that: The invention comprises a four-jaw chuck (1), four clamping jaws (2), a workpiece (3), a mounting groove (4) and a supporting mechanism. The four clamping jaws (2) are all slidably mounted on the four-jaw chuck (1) and are distributed in a ring array. The workpiece (3) is located between the four clamping jaws (2) and is in close contact with the four clamping jaws (2). The four-jaw chuck (1) is provided with a mounting groove (4). The supporting mechanism is arranged in the mounting groove (4). The supporting mechanism is used to support and reinforce the inner wall of the workpiece (3). The supporting mechanism comprises a mounting tube (5), two sealing plates (6), a micromotor (7), a rotating shaft (8), a rotating disk (9), four wedge blocks (10), four ejector rods (11) and four connecting blocks (12). The mounting tube (5) is movably mounted in the mounting groove (4). The two sealing plates (6) are respectively fixedly mounted on the mounting tube (5). The micromotor (7) is fixedly mounted in the mounting tube (5) at the front and rear ends, the rotating shaft (8) is fixedly mounted on the output shaft end of the micromotor (7), the front end of the rotating shaft (8) is rotatably connected to the corresponding blocking plate (6), the rotating disk (9) is fixedly sleeved on the rotating shaft (8), the four wedge blocks (10) are fixedly mounted on the rotating disk (9) and are distributed in a ring array, the four push rods (11) are slidably mounted on the mounting tube (5) and are distributed in a ring array, the four connecting blocks (12) are respectively fixedly mounted on the ends of the four push rods (11) that are close to each other, the four connecting blocks (12) are respectively in sliding contact with the corresponding wedge blocks (10), and the ends of the four push rods (11) that are away from each other extend to the outside of the mounting tube (5) and are in close contact with the inner wall of the workpiece (3).

2. A turning tool for thin-wall workpiece contour processing according to claim 1, characterized in that: Springs (13) are slidably mounted on the four push rods (11); the ends of the four springs (13) that are close to each other are fixedly connected to four connecting blocks (12) respectively; and the ends of the four springs (13) that are far away from each other are fixedly connected to the inner wall of the mounting tube (5).

3. A turning tool for thin-wall workpiece contour processing according to claim 1, characterized in that: An internal thread is provided on the inner wall of the installation groove (4), a connecting pipe (14) is installed on the internal thread of the installation groove (4), and the connecting pipe (14) is fixedly sleeved on the installation pipe (5).

4. A turning tool for thin-wall workpiece contour processing according to claim 1, characterized in that: The front end of the mounting tube (5) is flush with the front sides of the four claws (2).

5. A turning tool for thin-wall workpiece contour processing according to claim 1, characterized in that: A fixing block (15) is fixedly mounted on the rear side of the rear blocking plate (6).

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