Torsional vibration ultrasonic honing device

Abstract

This invention discloses a torsional vibration ultrasonic honing device, comprising: a mounting base, a honing stone mechanism, a mandrel, a drive mechanism, an amplitude transformer, and a piezoelectric transducer. The honing stone mechanism is mounted on the mounting base, the mandrel passes through the mounting base and is connected to the honing stone mechanism, and the drive mechanism is connected to the mandrel. The drive mechanism drives the honing stone mechanism to reciprocate along the radial direction of the mounting base via the mandrel. The input end of the amplitude transformer is connected to the piezoelectric transducer, and the output end of the amplitude transformer is connected to the honing stone mechanism. This invention, through a one-to-one correspondence between the amplitude transformer, the piezoelectric transducer, and the honing stone mechanism, employs direct-drive ultrasonic torsional vibration. Compared to ultrasonic honing devices using a single piezoelectric transducer and ultrasonic honing devices with built-in piezoelectric transducers using longitudinal vibration, this torsional vibration method significantly reduces ultrasonic energy loss and greatly increases the amplitude of the honing stone, thereby improving the honing efficiency and processing quality of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of honing technology, and more particularly to a torsional vibration ultrasonic honing device. Background Technology

[0002] Honing is a surface finishing technique primarily used to improve the dimensional accuracy, shape accuracy, and surface roughness of the inner surfaces of parts. However, conventional honing often encounters problems when honing tough metals such as titanium alloys, aluminum alloys, and copper alloys, including severe honing stone clogging (honing stone clogging refers to the phenomenon where grinding debris adheres to the honing stone surface, preventing continuous honing), poor workpiece inner hole machining quality, and low honing efficiency. Applying ultrasonic vibration to the honing stone, creating ultrasonic honing, allows coolant and lubricant to directly enter the honing zone. This results in lower honing force and temperature, effectively reducing honing stone clogging in tough metals and improving the machining quality and honing efficiency of workpiece inner holes.

[0003] Existing ultrasonic honing devices mainly include: ultrasonic honing devices using a single piezoelectric transducer and ultrasonic honing devices using a built-in piezoelectric transducer (the piezoelectric transducer is located inside the oilstone base). Both ultrasonic honing devices using a single piezoelectric transducer and ultrasonic honing devices using a built-in piezoelectric transducer use longitudinal vibration.

[0004] An ultrasonic honing device using a single piezoelectric transducer has a curved vibrating disk installed at the output end of a longitudinal vibration amplitude transformer. Multiple flexible rods are then installed at the crests of the curved vibrating disk. The flexible rods drive the honing stone seat to vibrate longitudinally, thereby causing the honing stone to vibrate longitudinally. This design involves two vibration conversions: first, the longitudinal vibration of the amplitude transformer is converted into the bending vibration of the curved vibrating disk; second, the bending vibration of the curved vibrating disk is converted into the longitudinal vibration of the flexible rods, honing stone seat, and honing stone. This design results in a large amount of ultrasonic energy loss, which reduces the amplitude of the honing stone and seriously affects the honing efficiency of the workpiece.

[0005] An ultrasonic honing device with a built-in piezoelectric transducer is used: a deep hole (the hole depth is half the length of the honing stone) is drilled at one end of the honing stone base near the machine tool. A piezoelectric transducer with a small diameter is installed at the bottom of the deep hole. No amplitude transformer is set, so the amplitude of the piezoelectric transducer cannot be amplified. Considering the size and insulation requirements of the piezoelectric transducer electrode ears, as well as the screw size and the insulation problem inside the hole, the radiation area of ​​the piezoelectric ceramic sheet is almost gone, and the continuous output power of the piezoelectric transducer is almost gone (generally 6W-8W). The amplitude of the honing stone is only 1μm-3μm at most.

[0006] Both of these methods reduce the amplitude of the honing stone, affecting the honing efficiency and processing quality of the workpiece.

[0007] Furthermore, ultrasonic honing devices using a single piezoelectric transducer are connected by a flexible rod. The rigidity of the flexible rod itself restricts the uniformity of the expansion of the honing stone and the honing stone seat, as well as the flexibility of the honing head floating mechanism. This increases the expansion pressure of the honing stone, which can easily damage the dimensional and shape accuracy of the processed workpiece. Ultrasonic honing devices with built-in piezoelectric transducers are limited by the deep blind hole processing and assembly processes. It is difficult to make the bottom surface of the deep blind hole of the honing stone seat smooth and ensure a high degree of flatness and perpendicularity. It is also difficult for the output end face of the piezoelectric transducer to coincide with the bottom surface of the deep blind hole, and the two cannot be coupled. It is also difficult for the piezoelectric transducer output energy to be transmitted to the honing stone seat. Summary of the Invention

[0008] The technical problem to be solved by the present invention is: in order to solve the technical problems of small amplitude of the honing stone, low honing efficiency and poor processing quality of existing ultrasonic honing devices, the present invention provides a torsional vibration ultrasonic honing device. By improving the structure of the ultrasonic honing device, the ultrasonic energy loss can be significantly reduced and the amplitude of the honing stone can be greatly increased, thereby improving the honing efficiency and processing quality of the workpiece.

[0009] The technical solution adopted by this invention to solve its technical problem is: a torsional vibration ultrasonic honing device, comprising: a mounting base, an oilstone mechanism, a mandrel shaft, a drive mechanism, an amplitude transformer, and a piezoelectric transducer. The oilstone mechanism is mounted on the mounting base, the mandrel shaft passes through the mounting base and is connected to the oilstone mechanism, the drive mechanism is connected to the mandrel shaft, and the drive mechanism can drive the oilstone mechanism to reciprocate along the radial direction of the mounting base through the mandrel shaft. The input end of the amplitude transformer is connected to the piezoelectric transducer, and the output end of the amplitude transformer is connected to the oilstone mechanism. Multiple oilstone mechanisms are provided, and the multiple oilstone mechanisms are distributed in a ring with equal spacing. The number of amplitude transformers and the number of piezoelectric transducers are equal to the number of oilstone mechanisms.

[0010] Therefore, by adopting a one-to-one design of the amplitude transformer, piezoelectric transducer, and honing stone mechanism, and employing direct-drive ultrasonic torsional vibration, compared to the longitudinal vibration mode of ultrasonic honing devices using a single piezoelectric transducer or those with built-in piezoelectric transducers, this torsional vibration mode can significantly reduce ultrasonic energy loss, greatly increase the amplitude of the honing stone, and thus improve the honing efficiency and processing quality of the workpiece. At the same time, by optimizing the vibration mode of the honing stone, the honing efficiency of tough metal materials, hard and brittle materials, deep holes, and blind holes is improved, thereby enhancing the processing quality.

[0011] Furthermore, the oilstone mechanism includes: an oilstone base and an oilstone, the oilstone base is connected to the mounting base, the oilstone is located on the side of the oilstone base away from the expansion mandrel and is connected to the oilstone base, the output end of the amplitude transformer is connected to the side of the oilstone base near the piezoelectric transducer, and a first limiting groove is provided on the side of the oilstone base near the oilstone.

[0012] Furthermore, the mounting base has a first mounting groove in its circumferential direction and multiple second mounting grooves in its axial direction. The number of second mounting grooves is equal to the number of the oilstone mechanism. The oilstone seat passes through the second mounting groove along the axial direction of the mounting base and is slidably connected to the mounting base. Two mounting bases are provided, located on opposite sides of the oilstone seat. Thus, the first and second mounting grooves limit the radial movement of the oilstone mechanism, ensuring that it can only move radially along the mounting base within the second mounting groove.

[0013] Furthermore, it also includes: two first connecting mechanisms, each of which includes: multiple horizontal pins and a first spring. The horizontal pins pass through the whetstone base along the circumferential direction of the mounting base, with both ends of the horizontal pins extending into the first mounting groove and abutting against the inner wall of the first mounting groove. The first spring is located in the first mounting groove and passes through the first limiting groove. The number of horizontal pins is equal to the number of whetstone mechanisms. Thus, the horizontal pins limit the axial movement of the whetstone mechanism, ensuring that it does not move along the axial direction of the mounting base, but only along the radial direction. The cooperation of the first limiting groove and the first spring ensures that the first spring will not detach from the mounting base, thereby ensuring that the whetstone mechanism will not detach from the mounting base.

[0014] Furthermore, the expansion mandrel includes two first connecting parts and a second connecting part. The two first connecting parts are respectively installed at both ends of the second connecting part, and the first connecting parts are connected to the oilstone base. Each first connecting part includes a conical section and a cylindrical section. The conical section is installed on the left side of the cylindrical section. The diameter of the left end of the conical section is D1, and the diameter of the right end is D2. The diameter of the cylindrical section is D2. Wherein, D1 < D2, and the diameter of the conical section gradually changes from D1 to D2 from the left end to the right end. Thus, the relative position of the oilstone mechanism and the mounting base can be changed by the conical section, allowing the oilstone mechanism to reciprocate in the radial direction of the mounting base, thereby realizing the processing of workpieces with different hole diameters.

[0015] Furthermore, it also includes: a plurality of top pins, one end of which is connected to the oilstone base, the other end of which abuts against the outer peripheral surface of the first connecting part, the top pin passing through the mounting base and slidably connected to the mounting base; wherein: the number of top pins is twice the number of the oilstone mechanism.

[0016] Furthermore, the driving mechanism includes a motor, a threaded rod, and a sleeve rod. The output end of the motor is connected to one end of the threaded rod, the other end of the threaded rod is threadedly connected to one end of the sleeve rod, and the other end of the sleeve rod is connected to the first connecting portion near the threaded rod. Thus, starting the motor drives the rotation of the threaded rod, causing the sleeve rod to reciprocate along its axial direction. The expansion mandrel reciprocates with the reciprocating motion of the sleeve rod, thereby causing the oilstone mechanism to reciprocate along the radial direction of the mounting base, thereby enabling the processing of workpieces with different hole diameters.

[0017] Furthermore, it also includes: a second connecting mechanism, the second connecting mechanism comprising: a first connecting rod, a limiting seat, and a plurality of support plates, the first connecting rod being a hollow structure, the threaded rod and the sleeve rod being located inside the first connecting rod, and one end of the threaded rod extending to the outside of the first connecting rod, the mounting seat being located on the left side of the first connecting rod and connected to the first connecting rod, the limiting seat penetrating the first connecting rod, and the limiting seat being located on the right side of the mounting seat near the motor, the support plate being located on the right side of the limiting seat, and one end of the support plate being mounted on the outer peripheral surface of the first connecting rod, the plurality of support plates being distributed in a ring at equal intervals.

[0018] Furthermore, the second connecting mechanism also includes: a housing and a baffle, the housing being a hollow structure, the support plate being located inside the housing and the other end of the support plate being mounted on the inner wall of the housing, the baffle being located on the left side of the housing and connected to the housing, and the motor being connected to the housing.

[0019] Furthermore, the amplitude transformer is conical in shape, and a mounting flange is provided at the pitch circle of the amplitude transformer. This amplifies the torsional vibration amplitude at the input end of the amplitude transformer.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention employs a one-to-one correspondence between the amplitude transformer, piezoelectric transducer, and honing stone mechanism, utilizing direct-drive ultrasonic torsional vibration. Compared to the longitudinal vibration methods of ultrasonic honing devices using a single piezoelectric transducer or those with an integrated piezoelectric transducer, this invention offers several advantages.

[0022] 1. Torsional vibration can significantly reduce ultrasonic energy loss and greatly increase the amplitude of the honing stone, thereby improving the honing efficiency and processing quality of the workpiece.

[0023] 2. By optimizing the vibration mode of the honing stone, the honing efficiency of tough metal materials, hard and brittle materials, deep holes and blind holes can be improved, thereby improving the processing quality. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of the torsional vibration ultrasonic honing device of the present invention;

[0026] Figure 2 This is a schematic diagram of the axial cross-sectional structure of the torsional vibration ultrasonic honing device of the present invention;

[0027] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of a local structure at point A;

[0028] Figure 4 This is a schematic diagram of the installation structure of the oilstone mechanism, amplitude transformer, and piezoelectric transducer of the present invention.

[0029] Figure 5 This is a schematic diagram of the mounting base of the present invention;

[0030] Figure 6 This is a schematic diagram of the honing head body of the present invention;

[0031] Figure 7 This is a schematic diagram of the oilstone mechanism of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the expansion mandrel of the present invention;

[0033] Figure 9 This is a cross-sectional structural diagram of the first connecting portion of the present invention;

[0034] Figure 10 This is a schematic diagram of the driving structure of the present invention;

[0035] Figure 11 This is a schematic diagram of the structure of the second connecting mechanism of the present invention;

[0036] Figure 12 This is an exploded view of the second connecting mechanism of the present invention;

[0037] Figure 13 This is a cross-sectional view of the first mounting groove in the radial direction of the present invention;

[0038] Figure 14This is a schematic diagram of the structure of the first connecting rod of the present invention.

[0039] In the diagram: 1. Mounting base; 101. First mounting groove; 102. Second mounting groove; 103. Guide bar; 104. Second connecting rod; 105. Honing head body; 2. Homing stone mechanism; 201. Homing stone seat; 2011. First limiting groove; 202. Homing stone; 3. Expansion mandrel; 301. First connecting part; 3011. Conical section; 3012. Cylindrical section; 302. Second connecting part; 4. Drive mechanism; 401. Motor; 402. Threaded rod; 403 1. Sleeve rod; 4031. Key; 5. Amplitude rod; 501. Mounting flange; 6. Piezoelectric transducer; 7. First connecting mechanism; 701. Horizontal pin; 702. First spring; 8. Top pin; 9. Second connecting mechanism; 901. First connecting rod; 902. Limiting seat; 9021. Third limiting groove; 903. Support plate; 904. Housing; 9041. Mounting hole; 905. Baffle; 906. Second limiting groove; 907. Second spring; 908. Pin. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 based on the specific circumstances.

[0043] like Figures 1 to 14 The diagram shows the preferred embodiment of the present invention. The torsional vibration ultrasonic honing device of this embodiment includes: a mounting base 1, an oilstone mechanism 2, a mandrel 3, a drive mechanism 4, an amplitude transformer 5, and a piezoelectric transducer 6. The oilstone mechanism 2 is mounted on the mounting base 1. The mandrel 3 passes through the mounting base 1 and is connected to the oilstone mechanism 2. The drive mechanism 4 is connected to the mandrel 3. The drive mechanism 4 can drive the oilstone mechanism 2 to reciprocate along the radial direction of the mounting base 1 through the mandrel 3. The input end of the amplitude transformer 5 is connected to the piezoelectric transducer 6, and the output end of the amplitude transformer 5 is connected to the oilstone mechanism 2. There are multiple oilstone mechanisms 2, which are arranged in a ring with equal spacing. The number of amplitude transformers 5 and the number of piezoelectric transducers 6 are equal to the number of oilstone mechanisms 2. Therefore, by adopting a one-to-one design of the amplitude transformer 5, piezoelectric transducer 6, and honing stone mechanism 2, and employing direct-drive ultrasonic torsional vibration, compared to the longitudinal vibration mode of ultrasonic honing devices using a single piezoelectric transducer 6 and ultrasonic honing devices with built-in piezoelectric transducers 6, this torsional vibration mode can significantly reduce ultrasonic energy loss and greatly increase the amplitude of the honing stone 202, thereby improving the honing efficiency and processing quality of the workpiece. At the same time, by optimizing the vibration mode of the honing stone 202, the honing efficiency of tough metal materials (e.g., titanium alloys, aluminum alloys, copper alloys, etc.), hard and brittle materials (e.g., quenched steel, chromium plating, ceramics, etc.), deep holes, and blind holes is improved, thus improving the processing quality.

[0044] For example, when the continuous output power of the piezoelectric transducer 6 is 1000W, the amplitude of the honing stone 202 in the ultrasonic honing device using a single piezoelectric transducer 6 is 5μm-8μm; when the continuous output power of the piezoelectric transducer 6 is 500W, the amplitude of the honing stone 202 in this invention is 16μm-20μm. Due to structural limitations and honing force constraints, the continuous output power of the piezoelectric transducer 6 in the built-in ultrasonic honing device is only 6W-8W, and the amplitude of the honing stone 202 is only 1μm-3μm. This invention can significantly reduce ultrasonic energy loss and greatly increase the amplitude of the honing stone 202, thereby improving the honing efficiency and processing quality of the workpiece.

[0045] Specifically, the vibration mode of the piezoelectric transducer 6 is torsional vibration, which causes the amplitude transformer 5 to undergo torsional vibration, thereby causing the oilstone seat 201 and oilstone 202 to undergo torsional vibration, so as to perform torsional vibration ultrasonic honing on the inner hole of the workpiece.

[0046] In this embodiment, the oilstone mechanism 2 includes an oilstone base 201 and an oilstone 202. The oilstone base 201 is connected to the mounting base 1. The oilstone 202 is located on the side of the oilstone base 201 away from the expansion shaft 3 and is connected to the oilstone base 201. The output end of the amplitude rod 5 is connected to the side of the oilstone base 201 near the piezoelectric transducer 6. A first limiting groove 2011 is provided on the side of the oilstone base 201 near the oilstone 202.

[0047] In this embodiment, the mounting base 1 has a first mounting groove 101 in the circumferential direction and a plurality of second mounting grooves 102 in the axial direction. The number of second mounting grooves 102 is equal to the number of oilstone mechanisms 2. The oilstone seat 201 passes through the second mounting groove 102 along the axial direction of the mounting base 1 and is slidably connected to the mounting base 1. There are two mounting bases 1, which are located on both sides of the oilstone seat 201. Thus, the radial movement of the oilstone mechanism 2 can be limited by the first mounting groove 101 and the second mounting groove 102, ensuring that the oilstone mechanism 2 can only move along the radial direction of the mounting base 1 within the second mounting groove 102.

[0048] Specifically, such as Figure 6 As shown, two mounting seats 1 are connected by multiple guide bars 103. The number of guide bars 103 is equal to the number of honing stone mechanisms 2. The two mounting seats 1 pass through the second connecting rod 104. The top pin 8 passes through the second connecting rod 104 and is slidably connected to the second connecting rod 104. The two mounting seats 1, multiple guide bars 103 and the second connecting rod 104 together form the honing head body 105. The honing head body 105 is an integral structure used to install the honing stone mechanism 2. The second connecting rod 104 is a hollow structure. The expansion mandrel 3 and the sleeve rod 403 both pass through the second connecting rod 104. The two mounting seats 1 are referred to as mounting seat A and mounting seat B, respectively. Mounting seat A is located on the side away from the drive mechanism 4, and mounting seat B is located on the side closer to the drive mechanism 4.

[0049] In this embodiment, it further includes: two first connecting mechanisms 7, each first connecting mechanism 7 including: multiple horizontal pins 701 and a first spring 702. The horizontal pins 701 pass through the oilstone seat 201 along the circumferential direction of the mounting base 1. Both ends of the horizontal pins 701 extend into the first mounting groove 101, and the horizontal pins 701 abut against the inner wall of the first mounting groove 101. The first springs 702 are located in the first mounting groove 101 and pass through the first limiting groove 2011. The number of horizontal pins 701 is equal to the number of oilstone mechanisms 2 (since there are two first connecting mechanisms 7, the number of horizontal pins 701 in each first connecting mechanism 7 is equal to the number of oilstone mechanisms 2). Therefore, the axial movement of the whetstone mechanism 2 can be limited by the horizontal pin 701, ensuring that the whetstone mechanism 2 will not move along the axial direction of the mounting base 1, but can only move along the radial direction of the mounting base 1; through the cooperation of the first limiting groove 2011 and the first spring 702, it can be ensured that the first spring 702 will not detach from the mounting base 1, thereby ensuring that the whetstone mechanism 2 will not detach from the mounting base 1.

[0050] In this embodiment, the expansion mandrel 3 includes two first connecting parts 301 and a second connecting part 302. The two first connecting parts 301 are respectively installed at both ends of the second connecting part 302. The first connecting parts 301 are connected to the oilstone seat 201. Each first connecting part 301 includes a conical section 3011 and a cylindrical section 3012. The conical section 3011 is installed on the left side of the cylindrical section 3012. The diameter of the left end of the conical section 3011 is D1, and the diameter of the right end is D2. The diameter of the cylindrical section 3012 is D2. Wherein, D1 < D2, and the diameter of the conical section 3011 gradually changes from D1 to D2 from the left end to the right end. Thus, the relative position of the oilstone mechanism 2 and the mounting seat 1 can be changed by the conical section 3011, so that the oilstone mechanism 2 can reciprocate in the radial direction of the mounting seat 1, thereby realizing the processing of workpieces with different hole diameters.

[0051] Specifically, the two first connecting parts 301 are respectively referred to as first connecting part A and first connecting part B. First connecting part A is located on the side away from the drive mechanism 4, and first conical part B is located on the side closer to the drive mechanism 4.

[0052] In this embodiment, the depth of the second mounting groove 102 is L, and the stroke of the honing stone mechanism 2 is (D2-D1) / 2, where L>(D2-D1) / 2. This design ensures that the honing stone 202 structure will never detach, thus ensuring the smooth progress of honing.

[0053] In this embodiment, it also includes: a plurality of top pins 8, one end of the top pin 8 is connected to the oilstone seat 201, the other end of the top pin 8 abuts against the outer peripheral surface of the first connecting part 301, the top pin 8 passes through the mounting base 1 and is slidably connected to the mounting base 1; wherein: the number of top pins 8 is twice the number of oilstone mechanisms 2.

[0054] In this embodiment, the drive mechanism 4 includes a motor 401, a threaded rod 402, and a sleeve rod 403. The output end of the motor 401 is connected to one end of the threaded rod 402, and the other end of the threaded rod 402 is threadedly connected to one end of the sleeve rod 403. The other end of the sleeve rod 403 is connected to a first connecting portion 301 near the threaded rod 402. Thus, starting the motor 401 drives the rotation of the threaded rod 402, causing the sleeve rod 403 to reciprocate along its axial direction. The expansion mandrel 3 reciprocates along with the sleeve rod 403, thereby causing the oilstone mechanism 2 to reciprocate along the radial direction of the mounting base 1, thereby enabling the processing of workpieces with different hole diameters.

[0055] Specifically, the other end of the sleeve 403 is connected to the first connecting part B.

[0056] In this embodiment, a second connecting mechanism 9 is also included. The second connecting mechanism 9 includes a first connecting rod 901, a limiting seat 902, multiple support plates 903, a housing 904, and a baffle 905. The first connecting rod 901 is a hollow structure. The threaded rod 402 and the sleeve rod 403 are both located inside the first connecting rod 901, and one end of the threaded rod 402 extends to the outside of the first connecting rod 901. The honing head body 105 is located on the left side of the first connecting rod 901 and is connected to the first connecting rod 901. The limiting seat 902 penetrates the first connecting rod 901. A connecting rod 901, a support plate 903 located on the right side of the limiting seat 902, and one end of the support plate 903 installed on the outer circumferential surface of the first connecting rod 901, multiple support plates 903 are distributed in a ring at equal intervals, a housing 904 and a baffle 905, the housing 904 is a hollow structure, the support plate 903 is located inside the housing 904, and the other end of the support plate 903 is installed on the inner wall of the housing 904, the baffle 905 is located on the left side of the housing 904 and connected to the housing 904, and the motor 401 is connected to the housing 904.

[0057] Specifically, two baffles 905 are provided, and each baffle 905 is semi-circular. The space formed between the housing 904 and the baffle 905 is the second limiting groove 906. A third limiting groove 9021 is provided on the limiting seat 902. One end of the mounting flange 501 is placed in the second limiting groove 906, and the left and right sides of one end of the mounting flange 501 abut against the housing 904 and the baffle 905, respectively. The other end of the mounting flange 501 is placed in the third limiting groove 9021, and the left and right sides of the other end of the mounting flange 501 abut against the two side walls of the third limiting groove 9021, respectively. A second spring 907 and a pin 90 are provided in both the second limiting groove 906 and the third limiting groove 9021. 8. Two second springs 907 are designated as second spring A and second spring B, respectively. Two pins 908 are designated as pin A and pin B, respectively. One end of second spring A is connected to the inner wall of housing 904, and the other end of second spring A abuts against mounting flange 501. One end of pin A is connected to the inner wall of housing 904, and the other end of pin A is inserted into mounting flange 501 and slidably connected to mounting flange 501. One end of second spring B is connected to limit seat 902, and the other end of second spring B abuts against mounting flange 501. One end of pin B is connected to the inner wall of limit seat 902, and the other end of pin B is inserted into mounting flange 501 and slidably connected to mounting flange 501. Therefore, the left and right movement of the mounting flange 501 can be limited by the pin 908 to ensure that the mounting flange 501 will not move left or right. The amplitude rod 5 and the piezoelectric transducer 6 are cantilevered relative to the honing head body 105 and the honing stone mechanism 2. The cantilever setting can be eliminated by the second spring 907 to prevent the amplitude rod 5 and the piezoelectric transducer 6 from shaking along the radial direction of the mounting base 1, so as to improve the stability of the amplitude rod 5 and the piezoelectric transducer 6, and thus provide stability to the honing stone mechanism 2.

[0058] Specifically, the limit seat 902 is located on the right side of the B mounting seat, and the housing 904 has a mounting hole 9041, which facilitates the installation and disassembly of the motor 401 output end and the threaded rod 402.

[0059] Specifically, such as Figure 14 As shown, a key 4031 is provided on the outer circumferential surface of the sleeve rod 403. The key 4031 is slidably mounted on the second connecting rod 104. With this design, when the threaded rod 402 rotates, the sleeve rod 403 will not rotate with the threaded rod 402 due to the rotation restriction effect of the key 4031. Instead, it will only reciprocate along the axial direction of the threaded rod 402, thereby realizing the expansion of the oilstone seat 201 and the oilstone 202.

[0060] In this embodiment, the amplitude transformer 5 is conical in shape, and the pitch circle of the amplitude transformer 5 (e.g., Figure 4As shown, the pitch circle refers to the circular surface of the amplitude transformer 5 that does not vibrate, which is equipped with a mounting flange 501.

[0061] Specifically, the magnification is generally between 3 and 5 times.

[0062] The installation process of the torsional vibration ultrasonic honing device of the present invention is as follows: First, insert the horizontal pin 701 into the honing stone base 201; second, insert the expansion mandrel 3 into the honing head body 105; third, insert the top pin 8 into the honing head body 105, so that the top pin 8 abuts against the expansion mandrel 3; fourth, install the first spring 702 in the first mounting groove 101 and the first limiting groove 2011 to fix the honing stone mechanism 2 on the honing head body 105; fifth... The sixth step is to insert the threaded rod 402 into the sleeve rod 403; the seventh step is to fit the housing 904 into the first connecting rod 901 and fix the baffle 905 from the left side of the first connecting rod 901 to fix the honing head body 105 and the honing stone mechanism 2 onto the housing 904; the eighth step is to install the motor 401 on the right side of the housing 904 and connect the output shaft of the motor 401 to the threaded rod 402 to assemble the entire honing device.

[0063] The working principle of the torsional vibration ultrasonic honing device of the present invention is as follows: First, the housing 904 is mounted on the machine tool spindle (not shown in the figure) through a floating mechanism (not shown in the figure). Then, the honing head 105 and the honing stone mechanism 2 are inserted into the inner hole of the workpiece to be processed. Next, the motor 401, the piezoelectric transducer 6 and the machine tool spindle are started. The motor 401 brings the honing stone 202 into contact with the inner wall of the workpiece. The piezoelectric transducer 6 causes the honing stone 202 to undergo torsional vibration. The machine tool spindle causes the entire device to rotate and reciprocate linearly along the axis of the workpiece to perform torsional vibration ultrasonic honing on the inner hole of the workpiece.

[0064] In summary, this invention, through a one-to-one correspondence between the amplitude transformer 5, the piezoelectric transducer 6, and the honing stone mechanism 2, employs direct-drive ultrasonic torsional vibration. Compared to the longitudinal vibration mode of ultrasonic honing devices using a single piezoelectric transducer 6 and ultrasonic honing devices with an integrated piezoelectric transducer 6:

[0065] 1. Torsional vibration can significantly reduce ultrasonic energy loss and greatly increase the amplitude of the honing stone 202, thereby improving the honing efficiency and processing quality of the workpiece.

[0066] 2. By optimizing the vibration mode of oilstone 202, the honing efficiency of tough metal materials, hard and brittle materials, deep holes and blind holes is improved, thereby improving the processing quality.

[0067] The above description is based on the preferred embodiments of the present invention. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A torsional vibration ultrasonic honing device, characterized in that, include: Mounting base (1), and An oilstone mechanism (2) is mounted on the mounting base (1); Expanding mandrel (3) passes through the mounting base (1) and is connected to the whetstone mechanism (2); The drive mechanism (4) is connected to the expansion shaft (3). The drive mechanism (4) can drive the oilstone mechanism (2) to reciprocate along the radial direction of the mounting base (1) through the expansion shaft (3). Amplitude bar (5) and piezoelectric transducer (6), wherein the input end of the amplitude bar (5) is connected to the piezoelectric transducer (6), and the output end of the amplitude bar (5) is connected to the oilstone mechanism (2); Among them: multiple oilstone mechanisms (2) are provided, and the multiple oilstone mechanisms (2) are distributed in a ring with equal spacing. The number of amplitude rods (5) and the number of piezoelectric transducers (6) are equal to the number of oilstone mechanisms (2).

2. The torsional vibration ultrasonic honing device according to claim 1, characterized in that, The oilstone mechanism (2) includes: An oilstone base (201) and an oilstone (202) are provided. The oilstone base (201) is connected to the mounting base (1). The oilstone (202) is located on the side of the oilstone base (201) away from the expansion shaft (3) and is connected to the oilstone base (201). The output end of the amplitude rod (5) is connected to the side of the oilstone base (201) near the piezoelectric transducer (6). A first limiting groove (2011) is provided on the side of the oilstone base (201) near the oilstone (202).

3. The torsional vibration ultrasonic honing device according to claim 2, characterized in that, The mounting base (1) has a first mounting groove (101) in the circumferential direction and a plurality of second mounting grooves (102) in the axial direction. The number of the second mounting grooves (102) is equal to the number of the oilstone mechanism (2). The oilstone seat (201) passes through the second mounting groove (102) along the axial direction of the mounting base (1) and is slidably connected to the mounting base (1). There are two mounting bases (1), which are located on both sides of the oilstone base (201).

4. The torsional vibration ultrasonic honing device according to claim 3, characterized in that, Also includes: Two first connecting mechanisms (7), each of the first connecting mechanisms (7) includes: Multiple horizontal pins (701) and a first spring (702) are provided. The horizontal pins (701) pass through the oilstone base (201) along the circumferential direction of the mounting base (1). Both ends of the horizontal pins (701) extend into the first mounting groove (101) and abut against the inner wall of the first mounting groove (101). The first spring (702) is located in the first mounting groove (101) and passes through the first limiting groove (2011). Wherein: the number of the horizontal pins (701) is equal to the number of the oilstone mechanism (2).

5. The torsional vibration ultrasonic honing device according to claim 2, characterized in that, The expansion shaft (3) includes: Two first connecting parts (301) and a second connecting part (302) are provided. The two first connecting parts (301) are respectively installed at both ends of the second connecting part (302). The first connecting parts (301) are connected to the oilstone base (201). Each of the first connecting portions (301) includes a conical segment (3011) and a cylindrical segment (3012), wherein the conical segment (3011) is installed on the left side of the cylindrical segment (3012), the diameter of the left end of the conical segment (3011) is D1 and the diameter of the right end is D2, and the diameter of the cylindrical segment (3012) is D2; Wherein: D1 < D2, the diameter of the conical segment (3011) gradually changes from D1 to D2 from the left end to the right end.

6. The torsional vibration ultrasonic honing device according to claim 5, characterized in that, Also includes: Multiple top pins (8), one end of which is connected to the oilstone base (201), and the other end of which abuts against the outer peripheral surface of the first connecting part (301). The top pins (8) penetrate the mounting base (1) and are slidably connected to the mounting base (1). Wherein: the number of top pins (8) is twice the number of oilstone mechanisms (2).

7. The torsional vibration ultrasonic honing device according to claim 6, characterized in that, The drive mechanism (4) includes: The motor (401), the threaded rod (402), and the sleeve rod (403) are provided. The output end of the motor (401) is connected to one end of the threaded rod (402), the other end of the threaded rod (402) is threaded to one end of the sleeve rod (403), and the other end of the sleeve rod (403) is connected to the first connecting part (301) near the threaded rod (402).

8. The torsional vibration ultrasonic honing device according to claim 7, characterized in that, Also includes: The second connecting mechanism (9) includes: The system comprises a first connecting rod (901), a limiting seat (902), and multiple support plates (903). The first connecting rod (901) is a hollow structure. The threaded rod (402) and the sleeve rod (403) are both located inside the first connecting rod (901), and one end of the threaded rod (402) extends to the outside of the first connecting rod (901). The mounting seat (1) is located on the left side of the first connecting rod (901) and is connected to the first connecting rod (901). The limiting seat (902) passes through the first connecting rod (901) and is located on the right side of the mounting seat (1) near the motor (401). The support plates (903) are located on the right side of the limiting seat (902), and one end of the support plates (903) is mounted on the outer circumferential surface of the first connecting rod (901). The multiple support plates (903) are arranged in an equally spaced ring.

9. The torsional vibration ultrasonic honing device according to claim 8, characterized in that, The second connecting mechanism (9) further includes: The housing (904) and baffle (905) are hollow structures. The support plate (903) is located inside the housing (904), and the other end of the support plate (903) is installed on the inner wall of the housing (904). The baffle (905) is located on the left side of the housing (904) and is connected to the housing (904). The motor (401) is connected to the housing (904).

10. The torsional vibration ultrasonic honing device according to claim 1, characterized in that, The amplitude transformer (5) is conical in shape, and a mounting flange (501) is provided at the pitch circle of the amplitude transformer (5).

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