CN2430244Y

CN2430244Y - Auxiliary clamping device with no centre external circular through-feed grinding

Info

Publication number: CN2430244Y
Application number: CN 00242881
Authority: CN
Inventors: 刘晓初
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-07-26
Filing date: 2000-07-26
Publication date: 2001-05-16
Anticipated expiration: 2010-07-26

Abstract

The utility model discloses an external circle through-feed grinding auxiliary clamping device with no centre. When an external circle is ground, firstly a workpiece is offset along a circumferential direction and is tightly leaned against an end face with center aligning and is inserted with a plurality of circular ring-shaped sleeve blocks which have thicker radial directions and equal outer diameters with the workpiece and two parallel end faces; then the workpiece and the circular ring-shaped sleeve blocks are tightly clamped into an integral unit through the auxiliary clamping device, and lastly a plurality of workpiece units are connected together to realize the through-feed grinding of the special external circle on an external circle grinding machine with no center. The utility model has the advantages of ensuring machining precision, improving production efficiency and reducing processing expense.

Description

The auxiliary clamping device of a kind of centerless external cylindrical transfixion grinding

The utility model relates to the auxiliary clamping device of a kind of centerless external cylindrical transfixion grinding, be used for realizing on centreless grinding machine external special cylindrical excircle of workpiece grinding forming processing, this special cylindrical workpiece is meant frivolous workpiece and the arc cylinder workpiece that has hole or groove, concave surface.

Existing Cylindrical Centerless Grinding, when common cylindrical is carried out grinding, in order to keep high grinding efficiency, adopting the special application number of China is the centerless grinding device of CN86209906, on centreless grinding machine external, realize the transfixion grinding, as shown in Figure 1, this device mainly is made up of emery wheel 1, guide wheel 4 and supporting plate 5.Several workpiece 2 are come together adjacent to each other, by

feeding roller

6,7 workpiece is sent to, the supporting plate 5 of cross section bevel and 4 guide wheels are located and holding workpieces simultaneously, be trimmed at working surface under the frictional force effect of guide wheel 4 of hyperboloid of revolution, the workpiece rotation is also pushed ahead, by emery wheel 1 grinding, derive from guide groove 3 then, just finish grinding.Yet when using the special cylindrical workpiece of such method for grinding grinding, there are the following problems in production practices:

1. have the arc cylinder grinding of the workpiece of hole or groove, concave surface for the surface, as shown in Figure 2, because the profile of the periphery of workpiece 2 itself is not a circle, but the circular arc that protrudes totally one circle, it is a special arc cylinder that has hole 9 or groove, concave surface 8.When grinding, when the excircle part of the protrusion circular arc of workpiece contacts with guide wheel,, just relatively more abundant in the grinding of grinding place of the corresponding emery wheel of workpiece and workpiece because workpiece is pushed emery wheel to; Otherwise, just abundant inadequately because workpiece can rely on guide wheel when the recessed part of workpiece contacts with guide wheel in the grinding of grinding place of the corresponding emery wheel of workpiece and workpiece, thus the error of rerunning a movie produced, cause very difficult rounding.

2. for the cylindricalo grinding of frivolous workpiece, because one be that workpiece is beated and unstable easily, the 2nd, workpiece is thin easily to be produced strain and produces the error of rerunning a movie, and makes workpiece be difficult for rounding.

Usually in order to reach the rounding effect and to reduce this error of rerunning a movie, add and to carry out the grinding of few amount of feeding man-hour, when requiring 2 microns of circularity as outer round surface, can only grind 1-2 micron at every turn, if need the surplus of 0.1 millimeter on mill, will grind 50-100 time, so hanging down of one-tenth circle efficient is to have well imagined.

In addition, Chinese patent application CN98220574 discloses a kind of device (utility model patent) of centerless grinder grinding arc cylinder part.This device will be controlled the upper plane of two gauge finders of trimmer trimming wheel and guide wheel originally, change system into the surface of corresponding concave arc shape of concave, convex arc radius and dome arc respectively; And the supporting plate upper face also changed system into and the two corresponding concave arc shape of gauge finder concave, convex arc radius surfaces.Because generally all precision is higher for the workpiece accuracy of grinding, thereby the required precision of the made concavo-convex arcuate surface of this device is higher, shape is also complicated, so difficulty of processing is big, cost is high again, and wearing and tearing and bad finishing easily in profiling is used is difficult for guaranteeing the required degree of precision of grinding; Because workpiece is dynamically by guide wheel and supporting plate and by wheel grinding, contacting of workpiece and supporting plate and contacting of workpiece and guide wheel under the state of motion, must well be complementary, adapt, otherwise the surface of this profiling does not just have the effect of supporting and location.Therefore, must take all factors into consideration and calculate, could determine the geometric parameter and the installation site of this device in conjunction with the technological parameter in concrete production the (as the designing requirement of rotating speed and the angle of inclination and the part of guide wheel).Like this in case decided,, be complementary and adapt otherwise will have influence on regard to inconvenience adjusting process parameter again.Obviously, this is disadvantageous to processing, so that this device just seems is very inconvenient.

At above-mentioned existing in prior technology shortcoming, the purpose of this utility model is to overcome the existing special cylindrical of centerless external cylindrical through feed grinding method grinding and is difficult to rounding and inefficient shortcoming, a kind of Cheng Yuan effectively is provided, can efficiently carries out the auxiliary clamping device of special cylindrical excircle of workpiece grinding forming processing again.

The purpose of this utility model is to see in fact by following technical scheme: (1) has hole or groove when grinding skin, the outer bowlder of the workpiece of concave surface, the excircle part of the recessed portion of several workpiece and protrusion circular arc is along the circumferential direction misplaced in elder generation and end face is close to arrangement and centrally aligned, string together clamping by a kind of auxiliary clamping device, make it into an as a whole i.e. work cell (comprising auxiliary clamping device itself), and keep the vertical of work cell both ends of the surface and workpiece bus degree of precision, workpiece also concentric with auxiliary clamping device (to guarantee that afterwards the workpiece bus becomes level all the time in the through feed grinding), then several different work cell end faces are come to be put into together adjacent to each other and carry out foregoing through feed grinding on the centreless grinding machine external, make work cell have the excircle part of protruding circular arc to contact all the time with guide wheel, work cell just can not be because of circle the swinging back and forth and be difficult to rounding when being close to guide wheel of own outline, the grinding of workpiece everywhere relatively fully, thereby grinding is smooth, reaches the purpose of rounding.(2) when the outer bowlder of the frivolous cylindrical workpiece of grinding, the problem that does not exist dislocation to arrange, also be by above-mentioned same a kind of auxiliary clamping device, only need several workpiece string together and make it with auxiliary clamping device to quasiconcentric, clamp again and can carry out same grinding.Like this, quite increase the weight of workpiece on the one hand, improved the processing stability of workpiece, prevented beating of workpiece; Because the effect that clamps, improve the rigidity of workpiece on the other hand, reduced the processing that brings because of the strain error of rerunning a movie, thereby reached the effect of rounding.(3) between workpiece and workpiece, suitably insert in case of necessity and radially thicklyer be equal to external diameter and the parallel annular cover piece of both ends of the surface with workpiece again a bit, string together clamping by a kind of auxiliary clamping device, make it into as a whole i.e. work cell, and keep the vertical of work cell both ends of the surface and workpiece bus degree of precision, and workpiece should be aimed at the center line that auxiliary clamping device and this annular overlap piece.Like this, can make work cell stably to contact on the one hand, make that work cell is difficult for swinging back and forth more, thereby grind roundly by its circular profile with guide wheel; On the other hand, the insertion of such annular cover piece, also the rigidity of the work cell system of Zeng Jiaing is incited somebody to action better from forming round effect.

In above-mentioned technical solution, auxiliary clamping device for achieving the above object is made up of special screw, pad, outer nut, gripping sleeve piece, and on material property and geometric accuracy, satisfy instructions for use, the gripping sleeve piece be one with workpiece with the revolving body of external diameter; Special screw has interior angle nut (or other nut applicatory) and externally threaded screw rod, its head configuration also be one with workpiece and gripping sleeve piece cylinder with external diameter, the both ends of the surface of this cylinder and gripping sleeve piece are perpendicular with the screw rod of special screw respectively; The screw rod right-hand member that is enclosed within screw is to be respectively pad, outer nut, by outer nut in rotating workpiece is clamped work cell in aggregates (comprising auxiliary clamping device itself), and the screw rod right-hand member that makes this nut and screw must not protrude the end face of gripping sleeve piece, successfully carries out through feed grinding together to guarantee that on centreless grinding machine external each work cell can end face comes adjacent to each other.Certainly, above-mentioned auxiliary clamping device also can be other conversion and similar auxiliary clamping device.

The utility model is compared with existing Cylindrical Centerless Grinding technology, uses the utility model device, and bowlder outside grinding is special has following advantage:

1. for having the arc cylinder workpiece of hole or groove, concave surface, because the recessed portion of several workpiece with the excircle part of protruding circular arc along the circumferential direction misplaces and end face is close to and arranges and centrally aligned, and clamping makes it into as a whole, make workpiece have the excircle part of protruding circular arc to contact all the time with guide wheel, workpiece just can not swing back and forth when being close to guide wheel, thereby rounding is effective.

2. for frivolous cylindrical workpiece, make it to become an integral unit,, improved processing stability, can prevent beating of workpiece effectively so increased the weight of work cell owing to workpiece is clamped together; Improve the rigidity of workpiece simultaneously, reduced the processing that brings because of the strain error of rerunning a movie.

3. after the processing by above-mentioned " dislocation is close to arrangement " and " clamping is integral " like this, still adopt the transfixion grinding, because the efficientibility of transfixion grinding, therefore the utility model had both overcome the shortcoming of existing special cylindrical workpiece transfixion grinding cylindrical on centreless grinding machine external, and tool has been inherited the high advantage of centerless external cylindrical transfixion grinding efficiency again.

4. be equal to external diameter and the parallel annular cover piece of both ends of the surface with workpiece again because suitably insertion is radially thicker a bit in case of necessity, can make work cell can not only increase the rigidity of work cell system unit, and strengthened the stability of workpiece location, become the circle effect thereby strengthened, guaranteed machining accuracy.

5. avoid the complicated and more highly difficult transformation of the way of grinding attachment of foregoing Chinese patent application CN98220574, thereby reduced processing charges, and made that the processing versatility of centreless grinding machine external is good, expanded its range of work effectively.

Below in conjunction with drawings and Examples the utility model is done further detailed explanation:

Fig. 1. the schematic diagram of existing centerless external cylindrical transfixion grinding cylindrical;

Fig. 2. with the schematic diagram of the special cylindrical of centerless external cylindrical transfixion grinding;

Fig. 3. the workpiece clamp clamping method that the utility model adopted and the schematic diagram of auxiliary clamping device;

As shown in Figure 3, the designed auxiliary clamping device of the utility model is made up of special screw 10, pad 15, outer nut 14, gripping sleeve piece 13, and on material property and geometric accuracy, satisfy instructions for use, gripping sleeve piece 13 be one with workpiece with the revolving body of external diameter; Special screw 10 has interior angle nut 11 (or other nut applicatory) and externally threaded screw rod 16, its head configuration also be one with workpiece 2 and gripping sleeve piece cylinder 10 ＇ with external diameter, the both ends of the surface of this cylinder 10 ＇ and gripping sleeve piece 13 are perpendicular with the screw rod 16 of special screw respectively; Screw rod 16 right-hand members that are enclosed within screw 10 are to be respectively the end face that pad 15, outer nut 14 and screw rod 16 right-hand members must not protrude gripping sleeve piece 13.As shown in Figure 2, when grinding skin has hole 9 or groove, the outer bowlder of concave surface 8 and frivolous cylindrical workpiece 2, along the circumferential direction earlier the excircle part of the recessed portion of several workpiece 2 and protrusion circular arc, be close to arrangement and centrally aligned (simple frivolous then need not dislocation and arrange) by dislocation shown in Figure 3 and end face, and between workpiece and workpiece, suitably insert and radially thicklyer be equal to external diameter and the parallel annular cover piece 17 of both ends of the surface with workpiece again a bit, by rotating inner nut 11, outer nut 14 clamps into that diameter is equal to workpiece 2 and an one-piece machine member unit (comprising auxiliary clamping device itself) that length increases, and make the vertical of its both ends of the surface and workpiece bus degree of precision, and workpiece and annular cover piece should be aimed at the center line of auxiliary clamping device, then several work cell being stringed together end face comes adjacent to each other to be put into together and similarly carries out through feed grinding (with reference to Fig. 1) on the centreless grinding machine external, make that workpiece is difficult for swinging back and forth when being close to guide wheel, being able to fully and grinding successfully.Like this, quite increase the weight of work cell, improved the processing stability of workpiece, prevented beating of workpiece, and improved the rigidity of workpiece, reduced the processing that brings because of the strain error of rerunning a movie, thereby reached the effect of rounding.

Claims

1. the auxiliary clamping device of centerless external cylindrical transfixion grinding, it comprises: special screw (10), pad (15), outer nut (14), gripping sleeve piece (13), it is characterized in that: described special screw (10) has interior angle nut (11), or other nut applicatory, its head configuration is a cylinder (10 ＇), and described gripping sleeve piece (13) is the single-revolution body.

2. according to claim 1 described auxiliary clamping device, it is characterized in that: described cylinder (10 ＇) is with identical with workpiece (2) external diameter.

3. according to claim 1 described auxiliary clamping device, it is characterized in that: described gripping sleeve piece (13) is identical with workpiece (2) external diameter.

4. according to claim 1 described auxiliary clamping device, it is characterized in that: the both ends of the surface of described cylinder (10 ＇) and gripping sleeve piece (13) are perpendicular with screw rod (16) respectively.

5. according to claim 1 described auxiliary clamping device, it is characterized in that: described outer nut (14) and screw rod (16) right-hand member must not protrude the end face of gripping sleeve piece (13).