Conical turning device

Abstract

The invention relates to the technical field of non-ferrous metal processing equipment, and discloses a conical turning device which comprises a turning rack, a conical cutter, a circumferential driving device for driving the conical cutter and a workpiece to relatively circumferentially rotate along the central axis of the conical cutter, and an axial driving device for driving the conical cutter and the workpiece to relatively move along the axial direction, the peripheral face of the tool rest is a conical face, turning tools are fixed to the side, close to the central axis, of the tool rest, the turning tools are distributed along the generatrix of the conical face of the tool rest, and the tool handle is fixed to the conical top of the conical face of the tool rest. The device can avoid traditional manual operation errors and precision limitation, improves the machining efficiency and is suitable for batch production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of non-ferrous metal processing equipment, in particular to a conical turning device. BACKGROUND

[0002] As an important industrial raw material, molybdenum round bar is widely used in the fields of aerospace, electronics, metallurgy, etc. Before being processed into finished products, molybdenum round bar blanks often need to be turned to obtain the required dimensional accuracy and surface quality. Conical turning is one of the common processing procedures, which is used to process molybdenum round bar blanks with conical structure to meet specific assembly or use requirements.

[0003] Traditional conical turning of molybdenum round bar blanks is mostly done by using a general lathe combined with manual operation. The operator manually controls the feed and other actions of the lathe to make the turning tool perform conical turning on the molybdenum round bar blank. However, this method has many drawbacks. On the one hand, the machining accuracy is difficult to guarantee. The errors of manual operation and the movement accuracy of the simple mechanical structure of the general lathe limit the conical turning of the molybdenum round bar blank to high precision requirements in terms of taper, surface roughness, and other key indicators. Especially for some application scenarios with high requirements for conical precision, the precision defects of the traditional processing method are more prominent. On the other hand, the processing efficiency is low. The speed of manual operation is limited, and each turning adjustment takes a lot of time. For batch production of molybdenum round bar blanks, the traditional method is difficult to meet the production rhythm.

[0004] Therefore, it is urgent to propose a conical turning device to realize accurate and efficient conical turning of molybdenum round bars. SUMMARY

[0005] The purpose of the present application is to provide a conical turning device that can realize accurate and efficient conical turning of molybdenum round bars.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions: A conical turning device, comprising a turning rack, a conical tool, and a circumferential driving device for driving the conical tool and a workpiece to rotate circumferentially along the central axis of the conical tool; and an axial driving device for driving the conical tool and the workpiece to move axially relative to each other. The conical tool comprises a tool holder and a tool shank. The outer peripheral surface of the tool holder is a conical surface. A turning tool is fixed to one side of the tool holder near the central axis, and the turning tool is distributed along the generatrix of the conical surface of the tool holder. The tool shank is fixed to the top of the conical surface of the tool holder.

[0007] Preferably, the tool holder comprises a pair of tool holder bodies arranged opposite along the central axis of the tool holder; the tool holder bodies are distributed along the generatrix of the tool holder; the tool holder bodies are arranged in a V shape, and the outer circumferential surface where the tool holder bodies are located forms the conical surface; and one of the tool holder bodies is provided with the turning tool near one side close to the central axis.

[0008] Preferably, the tool holder comprises n tool holder bodies, and the outer circumferential surface where the tool holder bodies are located forms the conical surface; one of the tool holder bodies is provided with the turning tool near one side close to the central axis; and n≥3.

[0009] Preferably, the tool holder comprises a complete conical tool holder body formed integrally, and the inner conical surface of the conical tool holder is provided with the turning tool.

[0010] Preferably, the circumferential driving device comprises a tool holder circumferential driving motor, the output shaft of the tool holder circumferential driving motor is fixedly connected with the tool holder, and the output shaft of the tool holder circumferential driving motor is coaxially distributed with the tool holder.

[0011] Preferably, the circumferential driving device comprises a workpiece circumferential driving motor, the output shaft of the workpiece circumferential driving motor is fixedly connected with the workpiece and coaxially distributed with the workpiece.

[0012] Preferably, the axial driving device comprises a workpiece axial driving device for driving the axial movement of the workpiece.

[0013] Preferably, the axial driving device comprises a tool axial driving device for driving the axial movement of the conical tool.

[0014] Preferably, the turning rack is further provided with a dust collection box for sealing the conical tool, and the dust collection box is provided with a feeding hole at the top for the axial feeding of the workpiece to be machined.

[0015] Preferably, the conical turning device is further provided with a clamping mechanism and a conveying mechanism, the clamping mechanism at least comprises a mechanical arm for clamping the workpiece, the mechanical arm is provided with a clamp for clamping the workpiece to be machined, the clamping center of the clamp is collinear with the central axis of the feeding hole; and the conveying mechanism at least comprises a conveying belt for conveying the machined workpiece.

[0016] Compared with the prior art, the present application has the following beneficial effects: (1) The present application realizes the relative circumferential rotation of the conical tool and the workpiece along the central axis of the conical tool through the circumferential driving device, and realizes the relative movement of the two along the axial direction through the axial driving device, which can accurately control the turning trajectory, does not need manual adjustment of the feed, effectively avoids the traditional manual tool setting operation error, significantly improves the machining efficiency, and meets the batch production demand.

[0017] (2) The dust collecting box is arranged on the turning frame, and the molybdenum powder generated in the conical turning process is limited in the box, which can avoid the powder scattering and polluting the processing environment and harming the health of the operator, and can collect the molybdenum powder and prevent foreign matters from mixing into the powder, so as to protect the purity of the powder, facilitate the subsequent recycling and reuse, and reduce the waste of molybdenum raw materials and production cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a structure schematic view of the conical turning device of the embodiment 1 of the present application. Figure 2 It is Figure 1 It is an enlarged view of A in the figure. Figure 3 It is a structure schematic view of the tool holder of the embodiment 2 of the present application. Figure 4 It is a structure schematic view of the tool holder of the embodiment 3 of the present application. Figure 5 It is a schematic view of the technical solution adopted by the embodiment 4 of the present application. Figure 6 It is a schematic view of the technical solution adopted by the embodiment 5 of the present application. Figure 7 It is a schematic view of the technical solution adopted by the embodiment 6 of the present application.

[0020] Reference signs: 10-turning frame, 12-tool holder body, 13-tool holder body, 14-turning tool, 15-tool holder circumferential driving motor, 16-mounting plate, 17-dust collecting box, 20-robotic arm, 30-conveying belt, 40-workpiece. DETAILED DESCRIPTION

[0021] In order to further understand the present application, the preferred embodiments of the present application will be described in combination with the embodiments below, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present application, and are not limitations on the claims of the present application.

[0022] Embodiment 1 As shown in the accompanying Figures 1-2As shown, the embodiment provides a taper turning device, which includes a turning frame 10, a taper tool, a circumferential driving device for driving the relative circumferential rotation of the taper tool and the workpiece 40 along the central axis of the taper tool, and an axial driving device for driving the relative axial movement of the taper tool and the workpiece 40.

[0023] The taper tool is a turning correction execution component for removing the excess blank of the workpiece 40 to ensure dimensional accuracy, which includes a tool holder and a tool shank 13. The outer peripheral surface of the tool holder is a tapered surface, which is adapted to the diameter size gradient principle of the taper surface mechanism to realize small turning amount machining and avoid the fracture of the molybdenum round bar blank due to large feed amount; the tool holder is fixed with a turning tool 14 on the side close to the central axis, and the turning tool 14 is distributed along the generatrix of the tapered surface of the tool holder to ensure uniform contact between the tool and the workpiece 40 during turning and to ensure the cylindricity of the workpiece 40. The tool shank 13 is fixed to the top of the taper surface where the tool holder is located, which is used to connect the tool holder and the driving component to realize power transmission and ensure stable operation of the tool holder.

[0024] Further, the tool holder of the embodiment includes a pair of tool holder bodies 12 arranged opposite to each other along the central axis of the tool holder, which realizes bidirectional synchronous turning of the workpiece 40 through symmetrical arrangement to ensure force balance of the workpiece 40 and reduce deformation or fracture. The pair of tool holder bodies 12 are distributed along the generatrix of the tool holder; the pair of tool holder bodies 12 are arranged in a V shape, and the outer peripheral surface where the pair of tool holder bodies 12 are located forms a tapered surface; one tool holder body 12 is provided with a turning tool 14 on the side close to the central axis.

[0025] In the embodiment, the tool holder takes the central axis thereof as the center of symmetry, the groove walls on both sides extend outwardly and obliquely, and a plurality of pin shaft holes for mounting tools are uniformly distributed along the length direction on the groove walls; a positioning pin shaft for fixing the turning tool 14 is arranged in the pin shaft hole; In the embodiment, the tool shank 13 is in a cylindrical structure, and an installation hole for connecting with the circumferential driving device or the axial driving device is arranged in the tool shank 13 along the axial direction; a key groove is arranged on the inner wall of the installation hole to realize fixed connection of the tool holder with the circumferential driving device or the axial driving device.

[0026] In the embodiment, the taper tool is circumferentially rotated, and the workpiece is axially fed. The axial driving device includes a workpiece axial driving device for driving the axial movement of the workpiece 40, which is preferably a mechanical arm 20. The mechanical arm 20 is adapted to the original equipment of the production line to reduce the integration difficulty; a clamp is arranged on the mechanical arm 20 for clamping the workpiece 40 to be processed, the clamping center of the clamp is collinear with the central axis of the feeding hole to ensure that the workpiece 40 moves along the set central axis when it is axially fed, avoid size error caused by deviation, and ensure that the workpiece 40 accurately enters the turning area.

[0027] The circumferential driving device comprises a tool holder circumferential driving motor 15, which provides circumferential rotation power for the tool holder, drives the tool holder and the turning tool 14 to rotate at a uniform speed to realize the cutting action. The output shaft of the tool holder circumferential driving motor 15 extends into the mounting hole of the tool holder 13 and is circumferentially fixed with the tool holder 13 through the cooperation of the flat key and the key groove, so as to realize the transmission cooperation between the tool holder circumferential driving motor 15 and the tool holder. In the embodiment, the tool holder axial driving motor can be provided with a speed reducer as needed.

[0028] The mounting plate 16 is a motor bearing component, which ensures that there is no displacement when the motor works. The mounting plate 16 is horizontally arranged on the turning rack 10, and screw holes are arranged thereon. The motor is fixed with the mounting plate 16 through bolts passing through the screw holes, which facilitates the installation, disassembly and maintenance of the motor. The center position of the mounting plate 16 is also provided with a motor positioning hole, which is used for radially positioning the output shaft of the tool holder circumferential driving motor 15, ensuring the coaxiality of the output shaft of the tool holder circumferential driving motor 15 and the tool holder 13, avoiding additional radial force generated by power transmission, preventing tool holder vibration, ensuring stable turning, ensuring uniform cutting line speed of the turning tool 14, and improving the surface processing quality of the workpiece 40.

[0029] The turning rack 10 is also provided with a dust collection box 17 for sealing the conical tool, which prevents the powder generated by turning from flying and polluting the environment, avoids the pollution of the powder by external impurities, ensures that the powder can be reused, and reduces the production cost of tungsten and molybdenum metal. The dust collection box 17 is provided with an inlet hole at the top, which is used for the axial feeding of the workpiece 40 to be processed. The size of the inlet hole is matched with the diameter of the workpiece 40, which ensures the smooth entry of the workpiece 40 and reduces the escape of powder, and improves the collection rate.

[0030] The conical turning device is also provided with a clamping mechanism and a conveying mechanism. The clamping mechanism is used for stable clamping of the workpiece 40 during turning, preventing the workpiece 40 from shaking or displacing to ensure accuracy; the conveying mechanism is used for conveying the workpiece 40 after turning, realizing the circulation of the workpiece 40 to ensure the continuity of production.

[0031] In the embodiment, the clamping mechanism is preferably a mechanical arm 20 of the workpiece axial driving device, which reduces the number of components to simplify the equipment structure, and the clamping action of the mechanical arm 20 is coordinated with the axial driving action to ensure the stable feeding of the workpiece 40 in the clamped state; the conveying mechanism is preferably a conveying belt 30, which is used for conveying the workpiece 40 after turning, and is connected with the discharging action of the mechanical arm 20 to convey the workpiece 40 to a stacking area, realizing fully automatic production, reducing labor cost and safety hazards.

[0032] The specific working principle is as follows: The original automatic demolding mechanical arm of the production line moves the demolded powder pressed into a molybdenum round rod green body to the mechanical arm 20 of the starting device, the clamp of the mechanical arm 20 stably clamps and fixes the workpiece 40, so as to prevent the workpiece 40 from shaking or moving in the subsequent feeding and turning process. Then, the mechanical arm 20 of the axial driving device drives the workpiece 40 to move axially, so that the workpiece 40 enters the closed dust collection box 17 through the feeding hole at the top of the dust collection box 17, until the front end of the workpiece 40 is close to the tool holder position of the tapered tool, so as to prepare for the turning action.

[0033] Then, the tool holder circumferential driving motor 15 of the circumferential driving device starts to work, the output shaft drives the tool holder 13 and the tool holder to rotate at a constant speed around the center axis, and the turning tool 14 on the tool holder rotates synchronously with the tool holder, forming a stable cutting motion. At this time, the mechanical arm 20 continues to drive the workpiece 40 to feed slowly in the axial direction, so that the outer circle of the workpiece 40 is in contact with the rotating turning tool 14; because the outer circumferential surface of the tool holder is a tapered surface and the turning tool 14 is distributed along the generatrix of the tapered surface, during the axial feeding of the workpiece 40, the turning tool 14 turns the outer circle of the workpiece 40 according to the diameter gradient track of the tapered surface, accurately removes the excess blank of the workpiece 40, and realizes the size correction of the workpiece 40; the powder generated by turning is limited in the box by the closed dust collection box 17, so as to avoid flying and polluting the environment, prevent external impurities from polluting the powder, and ensure that the powder can be recycled and reused, which meets the requirement of the disclosure that the powder is pollution-free and recyclable to reduce production cost.

[0034] When the workpiece 40 is axially fed to the set length and the whole turning correction process is completed, the tool holder circumferential driving motor 15 stops working, and the tool holder and the turning tool 14 stop rotating synchronously. The mechanical arm 20 drives the turned workpiece 40 to move in the axial direction in the reverse direction, so that the workpiece 40 exits the dust collection box 17, and the workpiece 40 is moved to the conveying belt 30 of the conveying mechanism. The conveying belt 30 starts to work, stably conveying the turned workpiece 40 to the subsequent stacking process, and at the same time, the mechanical arm 20 is reset to the initial clamping position, ready to receive the next workpiece 40 to be processed, enter the next turning correction cycle, realize continuous automatic processing, and ensure production efficiency.

[0035] Embodiment 2 The embodiment provides a tapered turning device different from the embodiment 1, as shown in the accompanying drawings. Figure 3 The difference between the embodiment and the embodiment 1 is that the tool holder of the embodiment includes three tool holder bodies, the outer circumferential surface of the three tool holder bodies forms a tapered surface, and the three tool holder bodies are uniformly distributed along the central axis of the tapered surface, and one side of one tool holder body close to the central axis is provided with the turning tool.

[0036] Embodiment 3 The embodiment provides a tapered turning device different from the embodiment 1, as shown in the accompanying drawings. Figure 4As shown, the difference lies in that the tool holder of the embodiment comprises a complete conical tool holder body formed integrally, and the inner conical surface of the conical tool holder is provided with a turning tool.

[0037] Embodiment 4 The embodiment provides a conical turning device different from the embodiment 1, as shown in the accompanying drawings. Figure 5 As shown, the difference lies in that the tool holder of the embodiment comprises a complete conical tool holder body formed integrally, and the inner conical surface of the conical tool holder is provided with a turning tool.

[0038] Embodiment 5 The embodiment provides a conical turning device different from the embodiment 1, as shown in the accompanying drawings. Figure 6 As shown, the difference lies in that the tool holder of the embodiment comprises a complete conical tool holder body formed integrally, and the inner conical surface of the conical tool holder is provided with a turning tool.

[0039] Embodiment 6 The embodiment provides a conical turning device different from the embodiment 1, as shown in the accompanying drawings. Figure 7 As shown, the difference lies in that the tool holder of the embodiment comprises a complete conical tool holder body formed integrally, and the inner conical surface of the conical tool holder is provided with a turning tool.

[0040] In summary, the conical turning device of the application builds a precise relative motion system by innovatively designing a conical tool and matching a flexible selection of a circumferential driving device and an axial driving device, effectively avoiding the operation error of manual tool setting. At the same time, combined with a closed dust collection box, a mechanical arm clamping mechanism and a conveying belt conveying mechanism, on the basis of realizing high-precision conical turning of molybdenum round bar green body, automation and environmental protection of the machining process are achieved, the machining efficiency is significantly improved, and the batch production demand is met.

Claims

1. A taper turning device, characterized by, The turning frame comprises a turning frame, a conical cutter, a circumferential driving device for driving the conical cutter and a workpiece to rotate along a central axis of the conical cutter, and an axial driving device for driving the conical cutter and the workpiece to move along an axial direction. The conical cutter comprises a cutter holder and a cutter handle, an outer circumferential surface of the cutter holder is a conical surface, a turning tool is fixed on one side of the cutter holder close to the central axis, and the turning tool is distributed along a generatrix of the conical surface of the cutter holder; and the cutter handle is fixed on an apex of the conical surface of the cutter holder.

2. A taper turning device according to claim 1, characterized in that The cutter holder comprises a pair of cutter holder bodies arranged opposite to each other along a central axis of the cutter holder, the cutter holder bodies are distributed along a generatrix of the cutter holder, the cutter holder bodies are arranged in a V shape, an outer circumferential surface of the cutter holder bodies forms the conical surface, and the turning tool is arranged on one side of one of the cutter holder bodies close to the central axis.

3. A taper turning device according to claim 1, wherein The cutter holder comprises n cutter holder bodies, an outer circumferential surface of the cutter holder bodies forms the conical surface, the turning tool is arranged on one side of one of the cutter holder bodies close to the central axis, and n≥3.

4. A taper turning device according to claim 1, wherein The cutter holder comprises an integrally formed complete conical cutter holder body, and the inner conical surface of the conical cutter holder body is provided with the turning tool distributed along a generatrix.

5. A taper turning device according to claim 1, wherein The circumferential driving device comprises a cutter holder circumferential driving motor, and an output shaft of the cutter holder circumferential driving motor is fixedly connected with the cutter handle and coaxially distributed.

6. A taper turning device according to claim 1, wherein The circumferential driving device comprises a workpiece circumferential driving motor, and an output shaft of the workpiece circumferential driving motor is fixedly connected with the workpiece and coaxially distributed.

7. A taper turning device according to claim 1, wherein The axial driving device comprises a workpiece axial driving device for driving the workpiece to move along an axial direction.

8. A taper turning apparatus according to claim 1, wherein The axial driving device comprises a cutter axial driving device for driving the conical cutter to move along an axial direction.

9. A taper turning apparatus according to claim 1, wherein The turning frame is further provided with a dust collection box for sealing the conical cutter, and a feeding hole is formed in a top of the dust collection box for axially feeding a workpiece to be machined.

10. A taper turning apparatus according to claim 1, wherein The turning frame is further provided with a clamping mechanism and a conveying mechanism, the clamping mechanism at least comprises a mechanical arm, the mechanical arm is provided with a clamp for clamping the workpiece to be machined, a clamping center of the clamp is collinear with a central axis of the feeding hole, and the conveying mechanism at least comprises a conveying belt for conveying the machined workpiece.

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