CN212240310U - Special clamp for clamping shaft sleeve type parts on cylindrical grinding machine - Google Patents

Special clamp for clamping shaft sleeve type parts on cylindrical grinding machine Download PDF

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Publication number
CN212240310U
CN212240310U CN202020720156.8U CN202020720156U CN212240310U CN 212240310 U CN212240310 U CN 212240310U CN 202020720156 U CN202020720156 U CN 202020720156U CN 212240310 U CN212240310 U CN 212240310U
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China
Prior art keywords
shaft
sleeve
cylinder
thimble
tail
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CN202020720156.8U
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Chinese (zh)
Inventor
赵雷
张华�
杨川
陈华
余衡
匡青云
刘祥熙
胡琴
陈玉芬
梁耀辉
涂家豪
张志毅
谷燚
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Chongqing University Of Mechanical And Electrical Technology
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Chongqing University Of Mechanical And Electrical Technology
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Abstract

The utility model relates to a grinding machine processing field, concretely relates to special fixture that is used for cylindrical grinder to go up centre gripping axle sleeve type part for axle sleeve type part abrasive machining, cylindrical grinder include head thimble, tail thimble to and the tailstock frame of the swivel mount of fixed head thimble and fixed tail thimble, its special fixture that is used for cylindrical grinder includes chuck sleeve, the suspension shaft, ejecting mechanism and the hold-down mechanism of axle sleeve type part, the chuck housing covers outside the head thimble and fixes on the swivel mount, one of them end of suspension shaft stretches into in the chuck sleeve, and head end of head thimble top suspension shaft, ejecting mechanism is on the cylindrical grinder parallel to chuck sleeve and suspension shaft fixed mounting, hold-down mechanism cover is on the tail thimble, is used for the axle sleeve type part of pressing shaft cover on the suspension shaft; the special clamp realizes automatic compression and automatic unloading of parts, ensures the coaxiality of the parts during processing, prevents the eccentric condition of the processed shaft sleeve parts, and improves the processing precision of the parts.

Description

Special clamp for clamping shaft sleeve type parts on cylindrical grinding machine
Technical Field
The utility model relates to a grinding machine processing field, concretely relates to a special fixture that is used for cylindrical grinder to go up centre gripping axle sleeve class part for axle sleeve class part abrasive machining.
Background
With the rapid development of economy, the external grinding machine fixture is commonly used on machine tools in the industrial field, but many defects also appear in production applications, such as: the fixture of the grinding machine can not ensure the reference coincidence during the cylindrical grinding of the part, so that the machining error is larger, and the quality of the product is influenced; for the processing of sleeve parts with different shapes, different radial sizes or different axial sizes, in order to clamp a workpiece, a clamp device needs to be replaced frequently, the design and manufacturing cost and the production preparation period of the clamp are increased invisibly, and the production cost is increased. Or some grinding machine clamps, when clamping or discharging, the workpiece loading and unloading time is long, the consistency of the inner hole of the sleeve part and the axial lead of the mandrel is poor, and the coaxiality requirement between the outer circle and the inner hole of the sleeve part cannot be met, so that the processing quality of the part cannot be ensured.
For example: patent No. 201510105154.1 discloses a clamp for automatically clamping and loosening a circular workpiece of a cylindrical grinding machine, which comprises a clamping sleeve, a roller frame, rollers and a protective cover, wherein the roller frame is fixedly arranged at one end of a central hole of the clamping sleeve, and a plurality of rollers are arranged in the roller frame; the end face of the clamping sleeve is provided with a protective cover which is fixedly connected with the clamping sleeve, and the protective cover seals the roller frame and the roller in the clamping sleeve; the inner wall of the central hole of the clamping sleeve is provided with a plurality of groups of curved surfaces, and a plurality of wedge-shaped grooves are formed between the inner wall of the central hole and the outer surface of the workpiece. Although the clamp can position a part to be machined at one end directly through the centers at the two ends of the grinding machine by the clamp, the clamp can automatically clamp and rotate a workpiece as long as the grinding machine is started, and the clamp can automatically release the workpiece after the grinding machine stops, the manual calibration is still needed, the consistency of the inner hole of the sleeve part and the axial lead of the mandrel is poor, and the part does not have a tightening device during machining and is easy to loose or eccentric during rotation, so that the coaxiality requirement of the workpiece cannot be met, and the machining quality of the part cannot be ensured.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a special fixture that is used for centre gripping axle sleeve class part on the cylindrical grinder, realizes that the automation of part compresses tightly and unloads the piece automatically, guarantees the part and at the axiality of adding man-hour, prevents that the eccentric condition from appearing in the axle sleeve class part that processing came out, improves the machining precision of part.
In order to achieve the above purpose, the technical solution of the present invention is as follows:
the special fixture for the cylindrical grinding machine comprises a chuck sleeve, a suspension shaft of a shaft sleeve part, a push-out mechanism and a pressing mechanism, wherein the chuck sleeve covers the head thimble and is fixed on the turntable frame;
the pressing mechanism comprises a disc cover sleeve, a gasket, a pressing cylinder and a cylinder suspending plate, wherein the disc cover sleeve, the gasket, the pressing cylinder and the cylinder suspending plate are sequentially sleeved on a tail thimble from head to tail, the disc cover sleeve is sleeved on the tail thimble through a plane bearing, when a tail seat frame moves towards the direction of a rotary disc frame, the suspension shaft is sleeved by the disc cover sleeve, the tail end head of the suspension shaft is propped by the needle point of the tail thimble, the gasket is sleeved on a step of the disc cover sleeve, a cylinder body of the pressing cylinder is fixed on the cylinder suspending plate, a cylinder shaft is fixed on the gasket and extends towards the direction of a shaft sleeve part clamped on the suspension shaft, a limiting step is arranged at the tail thimble of the fixed cylinder suspending plate, and when the cylinder shaft of the pressing cylinder does work, the limiting.
The pressing mechanism drives the pressing cylinder through pneumatic control, the pressing cylinder is pressed and loosened through automation, so that the gap adjustment during part installation becomes simple, the position is adjusted when clamping of each part is not needed any more, the relaxation degree is easy to control, the verticality of the shaft part and a grinding machine tool can be ensured, the coaxiality and the cylindricity are ensured, the higher precision of the price of the shaft part is ensured, and particularly the working efficiency is greatly improved after manual clamping is not needed.
Further limiting, the push-out mechanism comprises a push-out cylinder and a push plate, the cylinder body of the push-out cylinder is fixed on the cylindrical grinder, the cylinder shaft stretches towards the tailstock, the push plate is perpendicular to the cylinder shaft, one end of the push plate is fixedly installed at the front end of the cylinder shaft, the other end of the push plate is clamped on the periphery of the suspension shaft in a semicircular shape in a clearance fit mode, and the diameter of the semicircular end of the push plate is smaller than the maximum diameter of the shaft sleeve type part.
Further, the shaft sleeve type part is a sleeve type part or a shaft sleeve type part with a shoulder.
The suspension shaft is further limited to be a multi-stage stepped shaft, the semicircular end head of the push plate is clamped on the largest diameter stepped section of the suspension shaft, the smallest diameter stepped section of the suspension shaft extends into the disc cover sleeve, in addition, an annular groove is arranged on the middle stepped section of the suspension shaft, and the shaft sleeve type parts are sleeved on the suspension shaft with the annular groove. The suspension shaft of multistage ladder is the middle ladder section of being convenient for clamps the part, and the ring channel increases the frictional force of part when processing, avoids producing mutual radial movement between part and the suspension shaft, and the maximum diameter ladder section is spacing when the part compresses tightly, and the minimum diameter ladder section is unloading and when compressing tightly, changes cooperation ejecting mechanism and hold-down mechanism work.
Further limit, the suspension shaft is a three-stage stepped shaft, the diameters of the suspension shaft are sequentially reduced along the direction from head to tail of the cylindrical grinding machine, and the middle stepped section and the minimum-diameter stepped section are in chamfer transition.
Further inject, the air cylinder that compresses tightly is two sets of, uses the tail thimble to fix between gasket and the suspension cylinder board as the symmetry center axle.
Further inject, the cover sleeve is the sub-assembly that comprises compressing tightly axle sleeve, fixed cover and connection piece, compresses tightly the axle sleeve and is the T style of calligraphy, compresses tightly the great one end of axle sleeve diameter and hugs closely the flat bearing cover on tail thimble, then the fixed cover is the T style of calligraphy, and the great one end of fixed cover diameter is covered on the flat bearing, and the less one end of diameter is overlapped on tail thimble with clearance fit's mode, and the connection piece cover is in compressing tightly the less one side of axle sleeve diameter, utilizes bolted connection to install between connection piece and the fixed cover.
Compared with the prior art, the utility model beneficial effect be: due to the fact that the pushing mechanism is installed, the automatic feeding and discharging function is achieved, due to the fact that the pressing mechanism is designed, the automatic jacking function is achieved, the part is jacked in machining, axial or radial displacement of the part in machining can be prevented, coaxiality of the part is guaranteed, and machining accuracy of the part is guaranteed.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
fig. 3 is a schematic perspective view of the pressing mechanism of the present invention;
fig. 4 is an exploded schematic view of the pressing mechanism of the present invention;
FIG. 5 is a schematic view of a three-dimensional structure of a shaft sleeve part loosened by the special fixture of the present invention;
fig. 6 is a schematic view of a three-dimensional structure of the special fixture for pressing the shaft sleeve part;
fig. 7 is the explosion three-dimensional structure diagram of the chuck sleeve and the suspension shaft installed on the head pin of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, and fig. 7, the special fixture for clamping a shaft sleeve type part on a cylindrical grinding machine includes a head thimble 1, a tail thimble 3, a rotary disk rack 2 for fixing the head thimble 1, and a tailstock 4 for fixing the tail thimble 3, where the tailstock 4 can move toward the rotary disk rack 2 along a transverse moving platform of the cylindrical grinding machine, so that a part to be machined between the head thimble 1 and the tail thimble 3 is tightly pressed between the two. The special fixture for the cylindrical grinding machine comprises a chuck sleeve 5, a suspension shaft 6, a pushing-out mechanism 7 and a pressing mechanism 8, wherein the suspension shaft 6 is used for hanging and installing shaft sleeve type parts, the chuck sleeve 5 covers a head thimble 1 and is fixed on a rotary table rack 2, one end of the suspension shaft 6 extends into the chuck sleeve 5, the head thimble 1 is propped against the head end of the suspension shaft 6, the suspension shaft rotates along with the head thimble 1 and the rotary table rack 2, the pushing-out mechanism 7 is parallel to the chuck sleeve 5 and the suspension shaft 6 and is fixedly installed on the cylindrical grinding machine, and the pressing mechanism 8 is sleeved on a tail thimble 3 and is used for pressing the shaft sleeve type parts 9 sleeved on the suspension shaft 6; the sleeve-like part 99 is a sleeve-like part or a shouldered sleeve-like part.
The pressing mechanism 8 comprises a cover sleeve 80, a gasket 81, a pressing cylinder 82 and a cylinder suspension plate 83 (the cylinder suspension plate is used for simultaneously suspending and mounting two pressing cylinders on the tail ejector pin) which are sequentially sleeved on the tail ejector pin 3 from head to tail, the cover sleeve 80 is sleeved on the tail ejector pin 3 through a plane bearing 84, when the tail seat frame 4 moves towards the direction of the rotary tray frame 2, the tray cover sleeve 80 sleeves the suspension shaft 6, the needle point of the tail thimble 3 is propped against the tail end head of the suspension shaft 6, the gasket 81 is sleeved on the step of the cover plate sleeve 80, the cylinder body of the pressing cylinder 82 is fixed on the cylinder suspension plate 83, the cylinder shaft of the pressing cylinder 82 is fixed on the gasket 81 and extends towards the shaft sleeve type part 9 clamped on the suspension shaft 6, the position of the tail thimble 3 of the fixed cylinder suspension plate 83 is provided with a limit step, the two groups of pressing cylinders 82 are fixed between the spacer 81 and the cylinder suspension plate 83 by taking the tail ejector pin 3 as a symmetrical central shaft. When the cylinder shaft of the pressing cylinder 82 does work, the limiting step is used for limiting the pressing mechanism 8 to move towards the tailstock 4. The tail ejector pin 3 is pressed against the suspension shaft 6, the disc cover sleeve 80 rotates along with the head ejector pin 1, the disc cover sleeve 80 is installed by a plane bearing and does not rotate along with the tail ejector pin 3, and then the connected pad/81, the pressing cylinder 82 and the suspension cylinder plate 83 do not rotate together and only the part is pressed.
The push-out mechanism 7 comprises a push-out cylinder 70 and a push plate 71, the cylinder body of the push-out cylinder 70 is fixed on the cylindrical grinder, the cylinder shaft of the push-out cylinder 70 extends towards the tailstock 4, the push plate 71 is perpendicular to the cylinder shaft of the push-out cylinder 70, one end of the push plate is fixedly installed at the front end of the cylinder shaft of the push-out cylinder 70, the other end of the push plate 71 is in a semicircular shape and is clamped on the periphery of the suspension shaft 6 in a clearance fit mode, and the diameter of the semicircular end of the push plate 71 is smaller than the maximum diameter of the. In this embodiment, for the shoulder shaft sleeve type part as an example, when the pushing mechanism does work and unloads, the diameter of the semicircular end of the pushing plate 71 is smaller than the shoulder shaft portion of the shoulder shaft sleeve type part, and the pushing plate 71 is clamped on the shoulder shaft portion of the shoulder shaft sleeve type part when moving towards the tail end, so as to drive the shoulder shaft sleeve type part to move towards the tail end of the suspension shaft 6, and then the unloading is completed.
The suspension shaft 6 is a three-stage stepped shaft, the diameter of the suspension shaft is sequentially reduced along the direction from head to tail of the cylindrical grinding machine, the semicircular end head of the push plate 71 is clamped on the maximum diameter stepped section 60 of the suspension shaft 6, the minimum diameter stepped section 61 of the suspension shaft 6 extends into the disc cover sleeve 80, in addition, an annular groove is arranged on the middle stepped section 62 of the suspension shaft 6, the shaft sleeve type parts 9 are sleeved on the suspension shaft 6 with the annular groove in a transition fit mode, one or two shaft sleeve type parts can be sleeved at one time, the inner diameters of different shaft sleeve type parts are matched with the suspension shafts 6 with different outer diameters, and the compression shaft sleeves 801 with different inner diameters are also matched. Preferably, the intermediate step section 62 and the minimum diameter step section 61 are in chamfer transition, so that loading and unloading of shaft sleeve parts are facilitated.
The cover sleeve 80 is a combined member composed of a pressing shaft sleeve 801, a fixing cover 802 and a connecting sheet 803, the pressing shaft sleeve 801 is T-shaped, one end with a larger diameter of the pressing shaft sleeve 801 is tightly attached to the plane bearing 84 and sleeved on the tail thimble 3, then the fixing cover 802 is T-shaped, one end with a larger diameter of the fixing cover 802 is covered on the plane bearing 84, one end with a smaller diameter is sleeved on the tail thimble 3 in a clearance fit manner, the connecting sheet 803 is sleeved on one side with a smaller diameter of the pressing shaft sleeve 801, and the connecting sheet 803 and the fixing cover 802 are connected and installed through bolts. It should be noted that the front needle of the tail thimble 3 extends into the pressing sleeve 801 but does not exceed the front end of the pressing sleeve 801, when the pressing sleeve 801 is sleeved forward along the tail end of the suspension shaft 6 and the front end of the tail thimble 3 just abuts against the tail end of the suspension shaft 6, the pressing sleeve 801 just presses the sleeve part 9 on the middle step section of the suspension shaft 6, at this time, the grinding machine can grind the sleeve part, after the machining, the cylinder shaft of the pressing cylinder 82 is retracted, the pushing cylinder 70 of the pushing mechanism 7 does work, and the pushing plate 71 pushes out the sleeve part 9 sleeved on the suspension shaft 6, so as to complete the unloading.
The motion process of the clamp in the embodiment when being matched with a cylindrical grinding machine for use is as follows: firstly, a worker needs to complete the installation of the clamp, the suspension shaft 6 and the chuck sleeve 5 are installed on the rotary table frame 2, the coaxiality of the suspension shaft and the head thimble 1 needs to be ensured, and the smoothness of rotation needs to be ensured. The push-out cylinder 70 is firmly installed and cannot be loosened during working, the perpendicularity of the push plate 71 and the suspension shaft 6 is guaranteed, the push plate 71 is also guaranteed to smoothly move along the suspension shaft 6 under the driving of the push-out cylinder 70, after the pressing mechanism 8 is installed, the coaxiality of the disc cover sleeve 80, the tail ejector pin 3 and the suspension shaft 6 is guaranteed, and when the pressing cylinder 82 extends and retracts during working, the tail end of the suspension shaft 6 can smoothly enter and exit the pressing shaft sleeve 801.
After the components are installed and adjusted, the shaft sleeve type part 9 to be machined is started to be arranged on the suspension shaft 6, then the pressing air cylinder 82 is started, the cylinder shaft of the pressing air cylinder 82 extends out, the pressing shaft sleeve 801 is driven forwards to extend out, so that the part is tightly pressed on the middle step of the suspension shaft 6, the maximum diameter step section 60 of the suspension shaft 6 is limited, and the part is just pressed at a position suitable for grinding.
After the machining is finished, the pressing cylinder 82 retracts, the pressing shaft sleeve 801 retracts to press the part, then the cylinder shaft of the pushing cylinder 70 is pushed out to do work, the pushing plate 71 moves, the shaft sleeve type part is pushed out of the hanging shaft 6, the part drops, and the unloading is finished. And finishing a cycle of machining, and then directly adding a new part without adjusting the position of the clamp to continue machining.
It is right above the utility model provides a special fixture for cylindrical grinder goes up centre gripping axle sleeve class part introduces in detail. The description of the specific embodiments is only for the purpose of helping understanding the method of the present invention and the core idea thereof, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (7)

1. A special fixture for cylindrical grinder goes up centre gripping axle sleeve class part, cylindrical grinder includes head thimble, tail thimble to and the tailstock frame of the carousel frame of fixed head thimble and fixed tail thimble, its characterized in that: the special fixture for the cylindrical grinding machine comprises a chuck sleeve, a suspension shaft of a shaft sleeve part, a push-out mechanism and a pressing mechanism, wherein the chuck sleeve covers a head thimble and is fixed on a turntable frame, one end of the suspension shaft extends into the chuck sleeve, the head thimble is propped against the head end of the suspension shaft, the push-out mechanism is parallel to the chuck sleeve and the suspension shaft and is fixedly arranged on the cylindrical grinding machine, and the pressing mechanism is sleeved on a tail thimble and is used for pressing the shaft sleeve part sleeved on the suspension shaft;
the pressing mechanism comprises a disc cover sleeve, a gasket, a pressing cylinder and a cylinder suspending plate, wherein the disc cover sleeve, the gasket, the pressing cylinder and the cylinder suspending plate are sequentially sleeved on a tail thimble from head to tail, the disc cover sleeve is sleeved on the tail thimble through a plane bearing, when a tail seat frame moves towards the direction of a rotary disc frame, the suspension shaft is sleeved by the disc cover sleeve, the tail end head of the suspension shaft is propped by the needle point of the tail thimble, the gasket is sleeved on a step of the disc cover sleeve, a cylinder body of the pressing cylinder is fixed on the cylinder suspending plate, a cylinder shaft is fixed on the gasket and extends towards the direction of a shaft sleeve part clamped on the suspension shaft, a limiting step is arranged at the tail thimble of the fixed cylinder suspending plate, and when the cylinder shaft of the pressing cylinder does work, the limiting.
2. The special clamp for clamping the shaft sleeve type part on the cylindrical grinding machine as claimed in claim 1, is characterized in that: the push-out mechanism comprises a push-out cylinder and a push plate, the cylinder body of the push-out cylinder is fixed on the cylindrical grinder, the cylinder shaft stretches towards the tailstock, the push plate is perpendicular to the cylinder shaft, one end of the push plate is fixedly installed at the front end of the cylinder shaft, the other end of the push plate is in a semicircular shape and is clamped on the periphery of the suspension shaft in a clearance fit mode, and the diameter of the semicircular end of the push plate is smaller than the maximum diameter of the shaft sleeve type part.
3. The special clamp for clamping the shaft sleeve type part on the cylindrical grinding machine as claimed in claim 2, wherein: the shaft sleeve type parts are sleeve type parts or shaft sleeve type parts with shoulders.
4. The special clamp for clamping the shaft sleeve type part on the cylindrical grinding machine as claimed in claim 3, wherein: the suspension shaft is a multi-stage stepped shaft, the semicircular end head of the push plate is clamped on the largest diameter stepped section of the suspension shaft, the smallest diameter stepped section of the suspension shaft extends into the disc cover sleeve, in addition, an annular groove is arranged on the middle stepped section of the suspension shaft, and the shaft sleeve type part is sleeved on the suspension shaft with the annular groove.
5. The special clamp for clamping the shaft sleeve type part on the cylindrical grinding machine as claimed in claim 4, wherein: the suspension shaft is a three-stage stepped shaft, the diameter of the suspension shaft is sequentially reduced along the direction from head to tail of the cylindrical grinding machine, and the middle stepped section and the minimum-diameter stepped section are in chamfer transition.
6. The special clamp for clamping the shaft sleeve type part on the cylindrical grinding machine as claimed in claim 1, is characterized in that: the two groups of pressing cylinders are fixed between the gasket and the cylinder suspension plate by taking the tail ejector pins as symmetrical central shafts.
7. The special clamp for clamping the shaft sleeve type part on the cylindrical grinding machine as claimed in claim 4, wherein: the disk cover sleeve is a combined piece consisting of a compression shaft sleeve, a fixed cover and a connecting piece, the compression shaft sleeve is T-shaped, one end with the larger diameter of the compression shaft sleeve is tightly attached to the plane bearing sleeve and sleeved on the tail thimble, then the fixed cover is T-shaped, one end with the larger diameter of the fixed cover covers the plane bearing, one end with the smaller diameter of the fixed cover is sleeved on the tail thimble in a clearance fit mode, the connecting piece is sleeved on one side with the smaller diameter of the compression shaft sleeve, and the connecting piece and the fixed cover are connected and installed through bolts.
CN202020720156.8U 2020-05-06 2020-05-06 Special clamp for clamping shaft sleeve type parts on cylindrical grinding machine Active CN212240310U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020720156.8U CN212240310U (en) 2020-05-06 2020-05-06 Special clamp for clamping shaft sleeve type parts on cylindrical grinding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020720156.8U CN212240310U (en) 2020-05-06 2020-05-06 Special clamp for clamping shaft sleeve type parts on cylindrical grinding machine

Publications (1)

Publication Number Publication Date
CN212240310U true CN212240310U (en) 2020-12-29

Family

ID=73998987

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020720156.8U Active CN212240310U (en) 2020-05-06 2020-05-06 Special clamp for clamping shaft sleeve type parts on cylindrical grinding machine

Country Status (1)

Country Link
CN (1) CN212240310U (en)

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