Ultrasonic turning force measuring special fixture and using method

Abstract

The application discloses a special clamp for ultrasonic turning force measurement and a use method, the clamp comprises a moving device, a clamping device and a positioning device, the moving device comprises a vertical moving mechanism and a horizontal moving mechanism, the horizontal moving mechanism is arranged on the vertical moving mechanism, the clamping device comprises a lathe clamping plate, a dynamometer clamping plate and a turning tool clamping plate, the lathe clamping plate is connected with the vertical moving mechanism, the dynamometer clamping plate is connected with the horizontal moving mechanism, the turning tool clamping plate is connected with the dynamometer clamping plate through a free telescopic rod, and the positioning device is installed on the outer side of the turning tool clamping plate. The clamp solves the problems that the current ultrasonic turning tool is difficult to be clamped on a common lathe and cannot be matched with most of the current dynamometers to measure force, and simultaneously, the positioning device is used for identifying the center line of a workpiece and realizing automatic tool setting, so that the error caused by manual tool setting is avoided, the machining quality is ensured to a certain extent, and the tool life is improved.

Description

Technical Field

[0001] This invention relates to a turning force measurement technology during ultrasonic turning, specifically a special fixture for measuring force during ultrasonic turning and its usage method, belonging to the field of metal processing technology. Background Technology

[0002] With the development of ultrasonic technology, it has been widely applied to various machining processes and has achieved remarkable results. Ultrasonic turning has attracted much attention and research from scholars. However, ultrasonic turning tools are much larger than ordinary turning tools, making it difficult to clamp them using traditional tool holders. Furthermore, since there is currently no dedicated force measuring device for ultrasonic turning tools, the cutting force, a crucial turning parameter, is difficult to measure. In addition, tool setting on ordinary lathes still largely relies on visual judgment, which can easily lead to significant errors between multiple turns. Moreover, misalignment between the tool tip and the workpiece centerline increases tool wear and reduces tool life. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of ultrasonic turning tools in the clamping and force measurement process by providing a special fixture for ultrasonic turning force measurement. This fixture solves the problems of ultrasonic turning tools being difficult to clamp on ordinary lathes and being unable to be used with most current force measuring instruments. At the same time, it identifies the center line of the workpiece through a positioning device and realizes automated tool setting, avoiding errors caused by manual tool setting, thus ensuring machining quality and improving tool life to a certain extent.

[0004] Another object of the present invention is to provide a method for using the above-mentioned ultrasonic turning force measuring fixture.

[0005] The objective of this invention can be achieved by adopting the following technical solutions:

[0006] An ultrasonic turning force measuring fixture includes a moving device, a clamping device, and a positioning device. The moving device includes a vertical moving mechanism and a horizontal moving mechanism. The clamping device includes a lathe clamp, a force measuring instrument clamp, and a tool clamp. The lathe clamp is connected to the vertical moving mechanism, the force measuring instrument clamp is connected to the horizontal moving mechanism, and the tool clamp is connected to the force measuring instrument clamp via a free telescopic rod. The positioning device is installed on the outside of the tool clamp.

[0007] Furthermore, the vertical movement mechanism includes a motor, a vertical lead screw, and a vertical guide rail. One end of the lathe clamp has a lead screw threaded hole and a guide rail hole. The lathe clamp is connected to the vertical lead screw through the lead screw threaded hole. The vertical guide rail passes through the guide rail hole. The output shaft of the motor is connected to the vertical lead screw.

[0008] Furthermore, the horizontal moving mechanism includes an adjusting handle, a horizontal lead screw, and a horizontal guide rail. The force gauge clamp has a lead screw thread groove and a guide rail groove. The force gauge clamp is connected to the horizontal lead screw through the lead screw thread groove. The end of the horizontal lead screw passes through the thread groove and is fixedly connected to the adjusting handle. The horizontal guide rail cooperates with the guide rail groove. The adjusting handle is provided with a corresponding scale.

[0009] Furthermore, the moving device also includes a connecting frame, and the vertical moving mechanism and the horizontal moving mechanism are respectively fixedly connected to the connecting frame.

[0010] Furthermore, a limit block is provided at the lower part of the lathe clamping plate.

[0011] Furthermore, the lathe clamp is provided with a lathe fixing elongated hole, which is fixedly connected to the lathe by screws.

[0012] Furthermore, the force gauge clamping plate is drilled with two rows of threaded holes, which are connected to the force gauge base by screws to complete the fixed clamping of the force gauge base.

[0013] Furthermore, the inner side of the tool holder is provided with a tool fastening screw and a tool slot. The tool slot is used to insert a tool and is fixed by the tool fastening screw. The bottom surface of the tool holder is provided with two rows of end face holes. The end face holes are fixed to the upper surface of the force gauge by screws. Fixing holes are provided on both sides of the bottom surface of the tool holder, and the fixing holes are connected to the free telescopic rod.

[0014] Furthermore, the positioning device is an infrared receiver-transmitter, and the installation position of the infrared receiver-transmitter is flush with the tool slot of the tool holder.

[0015] Another objective of this invention can be achieved by adopting the following technical solution:

[0016] A method for using a special fixture for ultrasonic turning force measurement, wherein the fixture is the aforementioned special fixture for ultrasonic turning force measurement, characterized in that the method includes: fixing a lathe clamping plate on a lathe; extending the free telescopic rod to its extended state; placing the force gauge on the force gauge clamping plate; and tightening screws corresponding to the threaded holes of the force gauge clamping plate to fix the force gauge; shortening the free telescopic rod so that the bottom surface of the tool clamping plate is in contact with the force gauge, and fixing the tool clamping plate to the upper surface of the force gauge with screws; inserting the cutting tool into the tool slot of the tool clamping plate and tightening the tool fastening screws to fix the cutting tool; during turning, rotating the adjusting handle to position the cutting tool tip in the correct horizontal position, activating the positioning device, and identifying the center line of the workpiece; driving the motor to control the vertical screw to rotate, thereby adjusting the vertical position of the cutting tool to complete the tool setting; when the force measurement task is not required, retracting the free telescopic rod to its shortest length to stabilize the tool clamping plate and the force gauge clamping plate.

[0017] The present invention has the following advantages over the prior art:

[0018] 1. This invention addresses the problem that ultrasonic turning tools are much larger than ordinary turning tools and are difficult to clamp. The fixture involved increases the distance between the clamping end and the base plate, making it suitable for turning tools of various sizes and types, so that they can be clamped on various ordinary lathes.

[0019] 2. This invention addresses the problem that there is no dedicated force measuring instrument and matching fixture for ultrasonic turning tools in the existing technology, enabling ultrasonic turning tools to be used with ordinary force measuring instruments to complete the turning force measurement work.

[0020] 3. This invention addresses the problem that conventional lathes still commonly rely on human eye alignment for tool setting. It incorporates an infrared receiver-transmitter positioning device to calibrate the centerline height of the workpiece. The device also uses a motor-driven lead screw to control the tool height adjustment, ensuring that the tool tip is aligned with the workpiece centerline height. This reduces machining errors caused by human factors and minimizes tool life. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is an overall structural diagram of the ultrasonic turning force measuring fixture according to an embodiment of the present invention.

[0023] Figure 2 This is a structural diagram of the combination of the force gauge clamping plate and the lathe clamping plate according to an embodiment of the present invention.

[0024] Figure 3 This is a structural diagram of the clamping plate of the force measuring instrument according to an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of drilling holes in a lathe clamping plate according to an embodiment of the present invention.

[0026] Figure 5 This is a structural diagram of the cutting tool clamping plate according to an embodiment of the present invention.

[0027] Among them, 1-lathe clamping plate, 101-lead screw threaded hole, 102-guide rail smooth hole, 103-lathe fixing elongated hole, 2-force gauge clamping plate, 201-threaded hole, 3-tool clamping plate, 301-tool fastening screw, 302-tool slot, 303-end face smooth hole, 304-fixing hole, 4-free telescopic rod, 5-infrared receiver and transmitter, 6-motor, 7-vertical lead screw, 8-vertical guide rail, 9-adjusting handle, 10-horizontal lead screw, 11-horizontal guide rail, 12-scale, 13-connecting frame, 14-limiting block. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Example:

[0030] like Figure 1 As shown, this embodiment provides a special fixture for ultrasonic turning force measurement. The fixture includes a moving device, a clamping device, and a positioning device. The moving device includes a vertical moving mechanism and a horizontal moving mechanism. The horizontal moving mechanism is mounted on the vertical moving mechanism. The clamping device is the main structure of the fixture, which includes a lathe clamp 1, a force measuring clamp 2, and a tool clamp 3. The lathe clamp 1 is connected to the vertical moving mechanism, the force measuring clamp 2 is connected to the horizontal moving mechanism, and the tool clamp 3 is connected to the force measuring clamp 2 through a free telescopic rod 4. The positioning device is an infrared receiver-transmitter 5, which is installed on the outside of the tool clamp 3.

[0031] like Figures 1-4As shown, the vertical movement mechanism includes a motor 6, a vertical lead screw 7, and a vertical guide rail 8. One end of the lathe clamp 1 has a lead screw threaded hole 101 and a guide rail hole 102. The lathe clamp 1 is connected to the vertical lead screw 7 through the lead screw threaded hole 101. The vertical guide rail 8 passes through the guide rail hole 102. The output shaft of the motor 6 is connected to the vertical lead screw 7. The vertical lead screw 7 can be rotated by driving the motor 6.

[0032] The horizontal movement mechanism includes an adjusting handle 9, a horizontal lead screw 10, and a horizontal guide rail 11. The force measuring instrument clamp 2 has a lead screw thread groove and a guide rail groove. The force measuring instrument clamp 2 is connected to the horizontal lead screw 10 through the lead screw thread groove. The end of the horizontal lead screw 10 passes through the thread groove and is fixedly connected to the adjusting handle 9. The horizontal guide rail 11 cooperates with the guide rail groove. The adjusting handle 9 is provided with a corresponding scale 12, which can be used to compare the movement distance.

[0033] To improve the stability of the lathe clamping plate 1 and the force gauge clamping plate 2, two vertical guide rails 8 and two horizontal guide rails 11 are provided in this embodiment. Correspondingly, there are two guide rail holes 102 and two guide rail grooves.

[0034] In order to enable the horizontal moving mechanism to be mounted on the vertical moving mechanism, the moving device in this embodiment also includes a connecting frame 13. The vertical moving mechanism and the horizontal moving mechanism are respectively fixedly connected to the connecting frame 13. Specifically, the vertical lead screw 7 and the vertical guide rail 8 are respectively fixedly connected to the connecting frame 13, and the horizontal lead screw 10 and the horizontal guide rail 11 are respectively fixedly connected to the connecting frame. The vertical moving mechanism, the horizontal moving mechanism, the lathe clamping plate 1 and the force measuring instrument clamping plate 2 are connected into an integrated structure through the connecting frame 13.

[0035] Furthermore, a limit block 14 is provided at the lower part of the lathe clamping plate 1, which can enhance the stability of the fixture; the lathe clamping plate 1 is provided with four lathe fixing elongated holes 103, which are fixedly connected to the lathe by screws, thereby fixing the fixture as a whole to the lathe.

[0036] Furthermore, the clamping plate 2 of the force measuring instrument has two rows of threaded holes 201 drilled on it. The threaded holes 201 are connected to the base of the force measuring instrument by screws, thus completing the fixed clamping of the base of the force measuring instrument.

[0037] like Figure 1 and Figure 5As shown, the tool holder 3 is used to clamp and fix the lathe tool. The inner side of the tool holder 3 is provided with a tool fastening screw 301 and a tool slot 302. The tool slot 302 is similar to the structure of a traditional tool holder, used to load the lathe tool and fix it with the tool fastening screw 301. This lathe tool is an ultrasonic lathe tool. Two rows of end face holes 303 are provided on the bottom surface of the tool holder 3. The end face holes are fixed to the upper surface of the force gauge with screws. During turning, the turning force is transmitted to the force gauge through the tool holder 3. The bottom surface of the tool holder has two sides... Each device is provided with a fixing hole 304, which is connected to the free telescopic rod 4. The free telescopic rod 4 is used to maintain the integrity and stability of the entire clamping device. The infrared receiver transmitter 5 is installed flush with the tool slot 302 of the tool holder 3, which facilitates feedback on the relative position of the workpiece centerline and the tool tip. The infrared receiver transmitter 5 determines the center height of the workpiece being turned, and then controls the motor 6 to rotate, so that the tool moves in the vertical direction, and finally the tool tip and the workpiece centerline are at the same horizontal line.

[0038] The method of using the ultrasonic turning force measuring fixture in this embodiment includes: applying it to a conventional lathe, before installation, removing the original tool post of the lathe, and fixing the lathe clamp 1 to the original tool post mounting position, thus fixing it on the lathe; pulling the free telescopic rod 4 to its extended state, placing the force gauge on the force gauge clamp 2, and tightening the screws corresponding to the threaded holes 201 of the force gauge clamp 2 to complete the fixing of the force gauge; shortening the free telescopic rod 4 so that the bottom surface of the tool clamp 3 is in contact with the force gauge, and using screws to fix the tool clamp 3 to the force gauge. The upper surface of the force gauge is fixed; the cutting tool is installed into the cutting tool slot 302 of the cutting tool holder 3, and the cutting tool fastening screw 301 is tightened to complete the fixing of the cutting tool; during turning, the adjusting handle 9 is rotated to make the cutting tool tip in the correct horizontal position, the infrared receiver transmitter 5 is turned on to identify the center line of the workpiece; the drive motor 6 controls the vertical lead screw 7 to rotate, driving the cutting tool to adjust the vertical position to complete the tool setting work; when the force measurement task is not required, the free telescopic rod 4 is retracted to the shortest length to make the cutting tool holder 3 and the force gauge holder 2 in a stable state.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and agreed, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. The terms "upper," "lower," "left," "right," and similar expressions used are for illustrative purposes only and do not represent the only possible implementation.

[0040] In summary, this invention solves the problem that ultrasonic lathe tools, due to their large size, cannot be matched with traditional fixtures and force gauges. It sets up horizontal and vertical lead screw guides to accommodate lathes and ultrasonic lathe tools of different sizes, and can perform fine-tuning of the tool position. At the same time, it uses infrared feedback to identify the height of the workpiece centerline to achieve automatic tool setting.

[0041] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. An ultrasonic turning force measuring jig, characterized by comprising: The utility model provides a lathe tooling device, including mobile device, clamping device and positioning device, the mobile device includes vertical moving mechanism and horizontal moving mechanism, the horizontal moving mechanism sets up on vertical moving mechanism, the clamping device includes lathe clamping plate, dynamometer clamping plate and turning tool clamping plate, the lathe clamping plate is connected with vertical moving mechanism, the dynamometer clamping plate is connected with horizontal moving mechanism, the turning tool clamping plate is connected with dynamometer clamping plate through free telescopic rod, the positioning device is installed outside the turning tool clamping plate, the positioning device is infrared receiving emitter, the infrared receiving emitter is installed outside the turning tool clamping plate, and the mounting position of infrared receiving emitter is flush with the lathe tool slot of turning tool clamping plate. The vertical moving mechanism includes motor, vertical direction screw rod and vertical direction guide rail, one end of the lathe clamping plate is provided with screw rod threaded hole and guide rail light hole, the lathe clamping plate is connected with vertical direction screw rod through screw rod threaded hole, the vertical direction guide rail passes through guide rail light hole, and the output shaft of the motor is connected with vertical direction screw rod;The horizontal moving mechanism includes adjusting handle, horizontal direction screw rod and horizontal direction guide rail, the dynamometer clamping plate is provided with screw rod threaded slot and guide rail slot, the dynamometer clamping plate is connected with horizontal direction screw rod through screw rod threaded slot, the end of the horizontal direction screw rod passes through threaded slot and is fixedly connected with adjusting handle, the horizontal direction guide rail is matched with guide rail slot, and the adjusting handle is provided with corresponding scale disc;The vertical direction guide rail and horizontal direction guide rail are both provided with two, and the guide rail light hole and guide rail slot are both correspondingly provided with two.

2. The ultrasonic turning force measuring fixture according to claim 1, wherein, The mobile device further includes connecting frame, and the vertical moving mechanism and the horizontal moving mechanism are fixedly connected with the connecting frame respectively.

3. The ultrasonic turning force measuring fixture according to any one of claims 1-2, characterized in that, The lower part of the lathe clamping plate is provided with a limiting block.

4. The ultrasonic turning force measuring fixture according to any one of claims 1-2, characterized in that, The lathe clamping plate is provided with a lathe fixing long slot hole, and the lathe fixing long slot hole is connected with a lathe through a screw.

5. The ultrasonic turning force measuring fixture according to any one of claims 1-2, characterized in that, The dynamometer clamping plate is provided with two rows of threaded holes, the threaded holes are connected with a dynamometer base through screws, and the fixing clamping of the dynamometer base is completed.

6. The ultrasonic turning force measuring fixture according to any one of claims 1-2, wherein, The inner side of the turning tool clamping plate is provided with a turning tool fastening screw and a turning tool slot, the turning tool slot is used for loading a turning tool, and the turning tool is fixed through the turning tool fastening screw, the bottom surface of the turning tool clamping plate is provided with two rows of end surface light holes, the end surface light holes are fixedly connected with the upper surface of the dynamometer through screws, and the bottom surface of the turning tool clamping plate is provided with a fixing hole on each side.

7. A method of using a special fixture for measuring force in ultrasonic turning, said fixture being a special fixture for measuring force in ultrasonic turning according to any one of claims 1-6, characterized in that, The method comprises the following steps: fixing the lathe clamping plate on the lathe, pulling the free telescopic rod to the elongated state, placing the force gauge on the force gauge clamping plate, tightening the screw corresponding to the threaded hole of the force gauge clamping plate, and completing the fixation of the force gauge; shortening the free telescopic rod, making the bottom surface of the lathe tool clamping plate adhere to the force gauge, and fixing the lathe tool clamping plate and the upper surface of the force gauge by using the screw; loading the lathe tool into the lathe tool clamping plate, tightening the lathe tool fastening screw, and completing the fixation of the lathe tool; during the turning machining, rotating the adjusting handle to make the lathe tool tip be in the correct horizontal position, opening the positioning device, and identifying the center line of the workpiece; driving the motor to control the rotation of the vertical screw rod, driving the lathe tool to adjust the vertical position, and completing the tool setting work; when the force measurement task is not needed, shortening the free telescopic rod to the shortest, and making the lathe tool clamping plate and the force gauge clamping plate be in the stable state.

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