CN102909645B - Vertical ultrasonic cylindrical honing device - Google Patents

Abstract

The invention discloses a honing device, especially a vertical ultrasonic cylindrical honing device, which includes a floating mechanism, a current collecting device and a honing head body. The floating mechanism includes a fixed ring arranged outside the ejector rod. A sliding sleeve is provided, the sliding sleeve is located on the outside of the fixed ring and a linear bearing is installed between the sliding sleeve and the fixed ring, and a pull-up spring is arranged on the outside of the sliding sleeve, the honing head body includes the inner body of the honing head and the outer body of the honing head, and the honing head There is a ring wedge sleeve between the inner and outer bottom of the honing head and the inner and outer bottom of the honing head. The piezoelectric chip group is embedded in the ring wedge sleeve. Multiple oil stone seats are evenly fixed on the inner wall of the lower part of the honing head inner body. Each oil stone seat is fixed. There are whetstone strips; the present invention is a vertical honing outer circle device capable of radially (transversely) vibrating the whetstone, which shortens the transmission chain of ultrasonic energy and facilitates quick replacement of whetstone strips, and is especially suitable for the processing of cylinders with smaller diameters, and It can form a cross pattern on the surface of the cylinder.

Description

Vertical ultrasonic cylindrical honing device

technical field

The invention relates to a honing device, in particular to a vertical ultrasonic cylindrical honing device.

Background technique

In the automatic control system of modern industry, the reliability requirements for electro-hydraulic servo valves, hydraulic valves, vane regulators, etc. are getting higher and higher, and there are also higher requirements for the surface morphology of the valve core and valve sleeve. At present, such parts are mainly completed by grinding and other processing techniques, and simple grinding can no longer meet the needs of industrial development. Adding ultrasonic vibration in grinding can greatly improve the processed surface quality of the workpiece. Ultrasonic vibration honing is the application of ultrasonic vibration cutting in honing. It has the advantages of small honing force, low honing temperature, high machined surface quality and high machining accuracy. It can solve the problems of easy clogging of oilstone and low honing efficiency in the ordinary honing process.

According to the actual needs of the precision machining of the outer circle, the ultrasonic vibration is applied to the honing process of the outer circle, which can not only finish the surface of the workpiece, but also form a cross pattern on the surface of the workpiece, which is good for the rapid sliding of the valve core. Excellent oil storage effect and good lubricating performance to improve reliability and wear resistance.

There are roughly two types of structures for ultrasonic honing devices in current literature and practical applications, such as patent application numbers 201020672721.4, 200620031811.9, 99108124.2 and 201210047050.6. The energy is gathered by the horn and then transmitted to the oilstone seat, so that the oilstone abrasive grains generate ultrasonic vibrations for processing. In the existing technology of ultrasonic honing devices, the structure of the honing device is complicated, and it is difficult to replace the oilstone. Ultrasonic energy The transmission chain is long, and the energy loss in the transmission process is relatively large, especially the amplitude attenuation is large, which is not conducive to workpiece processing.

The other is the patent application No. 201110202887.9, which is to insert a transducer after slotting on the oil stone seat, so that the oil stone produces longitudinal vibration and then drives the oil stone abrasive grains to vibrate. This structure has higher requirements for the processing of the oil stone seat, especially No matter how precisely the piezoelectric chip of the transducer embedded in the honing stone is manufactured, the vibration frequency and amplitude will be different. is a fatal flaw.

There is also a patent with a patent application number of 201120090850.7, which is an outer cylindrical honing head controlled by hydraulic control centering feed, which can finish the outer cylindrical surface of the workpiece. The honing head with this structure rotates and It does axial reciprocating motion, while the radial feed of the honing stone moves with the honing head is controlled by hydraulic pressure, the structure is more complicated, the manufacturing accuracy of related parts is high, and it is difficult to replace the oil stone.

At present, there are relatively few researches and introductions on cylindrical honing devices. For example, the patent No. 94228509.3 is for processing the outer surface of a slender shaft; this structure is suitable for cylindrical honing of large workpieces, and cannot realize small cylinders. Processing and processing accuracy is low.

Contents of the invention

The vertical ultrasonic honing device of the present invention overcomes the deficiencies in the prior art, and provides a vertical honing machine that can make the whetstone vibrate radially (laterally), shorten the transmission chain of ultrasonic energy, and quickly replace the whetstone. round device.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A vertical ultrasonic cylindrical honing device of the present invention comprises a floating mechanism, a current collecting device and a honing head body, a through hole is arranged at the center of the floating mechanism, a push rod is arranged in the through hole, and the floating The mechanism includes a fixed ring arranged on the outside of the ejector rod. A sliding sleeve is arranged inside the floating mechanism. The sliding sleeve is located outside the fixed ring and a linear bearing is installed between the sliding sleeve and the fixed ring. The sliding sleeve A pull-up spring is arranged on the outer side of the sleeve, one end of the pull-up spring is fixed on the floating mechanism, and the other end of the pull-up spring is connected with a fixed sleeve, and the fixed sleeve is fixed at the bottom of the sliding sleeve;

The honing head body includes a honing head inner body and a honing head outer body located outside the honing head inner body, the honing head inner body is connected to the bottom end of the sliding sleeve, and the honing head outer body is connected to the floating Mechanism bottom connection;

A ring wedge sleeve is arranged between the inner and outer bottom of the honing head and the inner and outer bottom of the honing head, and a piezoelectric chip group is embedded in the ring wedge sleeve, and the inner wall of the lower inner body of the honing head is evenly fixed with A plurality of whetstone seats, each of which is fixed with a whetstone bar.

The whetstone seat is provided with a top foot, the inner body of the honing head is provided with a slot matching the top foot, the top foot of the whetstone seat is placed in the slot hole, and the two sides of the whetstone seat Both are provided with opening grooves, and the whetstone seat is surrounded by a ring spring, and the ring spring bypasses the opening groove and passes through the inner body of the honing head in an S-shaped winding method to bind the whetstone seat against the On the inner body wall of the honing head.

A guide block is arranged between the oil stone seat and the oil stone seat.

The whole piezoelectric wafer group is trumpet-shaped.

The ring wedge sleeve is fixed inside the outer body of the honing head through a sealing viscous ring.

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

1. The present invention is simple in structure and high in transmission efficiency; compared with the existing outer circle ultrasonic honing device, the processing accuracy that this device can achieve is significantly improved, and is especially suitable for finishing the outer surface of a small cylinder (such as the valve of a servo valve) Core, etc.), and can be used for batch processing in machinery.

2. The present invention is an outer circle ultrasonic honing device proposed on the basis of power ultrasonic honing, which can carry out precise and ultra-precision machining on the outer circle surfaces of various materials, which has played a positive role in promoting the machinery industry and has broad application potential. Application prospects.

3. The present invention is especially suitable for the processing of cylinders with smaller diameters, and can form a cross pattern on the surface of the cylinders.

Description of drawings

Fig. 1 is a schematic structural diagram of a vertical ultrasonic cylindrical honing device.

Fig. 2 is a schematic structural diagram of A-A in Fig. 1 .

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

As shown in Figures 1 and 2, a vertical ultrasonic cylindrical honing device includes a floating mechanism 1, a current collecting device 2 and a honing head body, the device is connected to the main shaft of the machine tool, and the current collecting device 2 has three bearings , the ultrasonic signal can be guided to the trumpet-shaped piezoelectric chip group 12 synchronously rotating with the main shaft through wires;

A through hole is established at the center of the floating mechanism 1, and a push rod 3 is arranged in the through hole of the floating mechanism 1. The floating mechanism 1 includes a fixed ring 18 arranged on the outside of the push rod 3. Sleeve 6 is positioned at the outside of fixed ring 18 and linear bearing 4 is installed between sliding sleeve 6 and fixed ring 18, and sliding sleeve 6 outside is provided with pull-up spring 5, and one end of pull-up spring 5 is fixed on the floating mechanism 1, pulls up The other end of the spring 5 is connected with a fixed sleeve 7, the fixed sleeve 7 is fixed on the bottom of the sliding sleeve 6, the push rod 3 can make the sliding sleeve 6 move downward, and after the pressure of the push rod 3 is released, the spring 5 can be pulled up to make the sliding sleeve 6 move downward. Reset up.

The honing head body includes a honing head inner body 9 and a honing head outer body 8 located outside the honing head inner body 9, the honing head inner body 9 is connected to the bottom end of the sliding sleeve 6, and the honing head outer body 8 is connected to the bottom end of the floating mechanism 1;

A ring wedge sleeve 11 is arranged between the inner bottom of the honing head outer body 8 and the outer bottom of the honing head inner body 9. The ring wedge sleeve 11 is embedded with a piezoelectric chip group 12, and the piezoelectric chip group 12 is in the shape of a trumpet as a whole. The wafer group 12 and the ring wedge sleeve 11 are fixed by bolts 16, the ring wedge sleeve 11 is fixed inside the outer body 8 of the honing head through the sealing adhesive ring 13, and three oil stone seats 10 are evenly fixed on the inner wall of the lower part of the inner body 9 of the honing head, each The whetstone bases 10 are all fixed with whetstone bars, and a guide block 17 is arranged between the whetstone bases 10 and the whetstone bases 10 .

A top foot 101 is provided on the oilstone seat 10, and a slot 14 matching the top foot 101 is arranged on the inner body 9 of the honing head. The opening groove, the whetstone seat 10 is surrounded by a ring spring 15, the ring spring 15 bypasses the opening groove and passes through the inner body 8 of the honing head in an S-shaped winding method to tie the whetstone seat 10 against the wall of the inner body 8 of the honing head.

The workpiece to be processed penetrates through the center hole surrounded by the oil stone bar at the lower end of the honing head and the guide bar 17. The honing head body rotates with the main shaft of the machine tool and performs axial reciprocating motion. When the ejector rod 3 is under pressure, the sliding sleeve 6 is pushed to move downward. , because the upper end of the sliding sleeve 6 is fixed with the floating mechanism 1 through the linear bearing 4, it ensures that the sliding sleeve 6 moves downward along the axis of the center hole, and at the same time, it also ensures that the inner body 9 of the honing head fixed with it moves downward along the axis of the center hole The accuracy of the movement provides a guarantee for improving the machining accuracy. The oilstone seat 10 fixed axially by the top foot 101 through the slot hole 14 on the inner body 9 of the honing head also moves downward, and drives the top foot of the oilstone seat 10 101 slides on the inner surface of the ring wedge sleeve 11, because the ring wedge sleeve 11 is fixed inside the outer body 8 of the honing head by the sealing adhesive ring 13, and the inner wall of the ring wedge sleeve 11 shrinks inwardly, so the whetstone strip follows the direction of the whetstone seat 10 During the downward movement, it will shrink and get close to the outer surface of the workpiece; at the same time, the lower end of the ring wedge sleeve 11 is fixed by the bolt 16 to the trumpet-shaped piezoelectric chip group 12, and the axial ultrasonic vibration generated after the piezoelectric chip group 12 is connected to the ultrasonic power supply can be transmitted. To the ring wedge sleeve 11, this method has high energy transfer efficiency, and can effectively ensure that the ultrasonic vibration generated by the annular piezoelectric chip group 12 is evenly distributed to the ring wedge sleeve 11, so that the ring wedge sleeve 11 at each position The vibration is uniform, and the upper edge of the ring wedge sleeve 11 is at the node position, so that there will be no vibration collision with the outer body 8 of the honing head; the synchronous and consistent ultrasonic vibration of the ring wedge sleeve 11 is transmitted to the oilstone seat 10 through the top foot 101, so that The whetstone bar generates axial vibration and acts on the surface of the workpiece; in this way, the vibrating whetstone bar rotates around the surface of the workpiece and reciprocates to complete the ultrasonic honing of the outer surface of the workpiece.

After the stainless steel cylinder is processed by this device, the surface of the cylinder has a clear texture, no metal tearing, metal folding, etc., and within a length of 2mm, the number of grooves with a groove depth greater than 2μm in the honed texture is more than five; when When the surface intercept c=1μm, the support length ratio tp of the cylinder surface profile reaches more than 60%. In short, the surface quality of the workpiece after honing is far greater than that obtained by other processing methods.

In summary, the embodiments of the present invention have the following advantages:

1. The present invention is simple in structure and high in transmission efficiency; compared with the existing outer circle ultrasonic honing device, the processing accuracy that this device can achieve is significantly improved, and is especially suitable for finishing the outer surface of a small cylinder (such as the valve of a servo valve) Core, etc.), and can be used for batch processing in machinery.

2. The present invention is an outer circle ultrasonic honing device proposed on the basis of power ultrasonic honing, which can carry out precise and ultra-precision machining on the outer circle surfaces of various materials, which has played a positive role in promoting the machinery industry and has broad application potential. Application prospect.

3. The present invention is especially suitable for the processing of cylinders with smaller diameters, and can form cross textures on the surface of cylinders.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (5)

1. a vertical ultrasonic cylindrical grinding equipment, comprise relocation mechanism, current-collecting device and honing head body, in described relocation mechanism, through hole is established in center, in described through hole, be provided with push rod, it is characterized in that: described relocation mechanism comprises the retainer ring that is arranged on push rod outside, in described relocation mechanism, be provided with slip cap, described slip cap is provided with linear bearing between the outside of described retainer ring and described slip cap and retainer ring, on having, described slip cap arranged outside draws spring, on described, draw one end of spring to be fixed on relocation mechanism, on described, draw the other end of spring to be connected with fixed cover, described fixed cover is fixed on slip cap bottom,

Described honing head body comprises honing head endosome and the honing head ectosome that is positioned at described honing head endosome outside, and described honing head endosome is connected with described slip cap bottom, and described honing head ectosome is connected with described relocation mechanism bottom;

Between described honing head ectosome inner bottom part and described honing head endosome outer bottom, be provided with ring cover of wedge, in described ring cover of wedge, be embedded with piezoelectric chip group, on the inwall of described honing head endosome bottom, be evenly fixed with a plurality of oil stone bases, single described oil stone base is all fixed with oilstone bar.

2. vertical ultrasonic cylindrical grinding equipment as claimed in claim 1, it is characterized in that: on described oil stone base, establish top pin, on described honing head endosome, be provided with the slotted eye matching with described top pin, the top pin of described oil stone base is placed in described slotted eye, described oil stone base both sides are provided with open recess, on described oil stone base, be surrounded with ring spring, described ring spring is walked around described open recess and through the S-type winding of honing head endosome, described oil stone base is tied up and leaned against in described honing head on body wall.

3. vertical ultrasonic cylindrical grinding equipment as claimed in claim 2, is characterized in that: between described oil stone base and oil stone base, be provided with guide pad.

4. vertical ultrasonic cylindrical grinding equipment as claimed in claim 3, is characterized in that: described piezoelectric chip group integral body is horn-like.

5. vertical ultrasonic cylindrical grinding equipment as claimed in claim 4, is characterized in that: described ring cover of wedge is fixed on honing head ectosome inside by sealing sticky circle.