CN104139191A

CN104139191A - Ejector pin device with rotating speed display function

Info

Publication number: CN104139191A
Application number: CN201310164961.1A
Authority: CN
Inventors: 庄增信
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-07
Filing date: 2013-05-07
Publication date: 2014-11-12
Anticipated expiration: 2033-05-07
Also published as: CN104139191B

Abstract

The invention relates to an ejector pin device with a rotating speed display function. A mandrel is arranged in a center handle via a front bearing and a rear bearing; the front end of the mandrel penetrates out of the center handle and forms an ejector pin head; an induction block is arranged around the mandrel; an inductor for detecting the induction block is arranged around the center handle in a penetrating manner, and outputs a detection signal of the induction block to an external tachometer for display. When the device is in use, the center handle is mounted on a tailstock of a lathe and the ejector pin head pushes against a center hole at the tail end of a workpiece; when the workpiece rotates with a lathe spindle and drives the mandrel to rotate synchronously, the inductor detects the rotating speed of the mandrel, and the rotating speed is displayed on the tachometer, so that an operator can make the rotating speed of the mandrelbe consistent with the rotating speed of the lathe by adjusting the mandrel, the tailstock can drive the mandrel to push against the workpiece via the most appropriate pressure, and an appropriate push-against effect is achieved.

Description

The push pin device that tool rotating speed shows

Technical field

The present invention relates to a kind of CNC(numerical control) the tailstock accessory of lathe, relate in particular to the push pin device that a kind of tool rotating speed shows.

Background technology

Existing CNC lathe is holding workpiece on the chuck of main shaft, with the thimble on tail stock, lean again the heart hole, top of workpiece end, when CNC lathe is in the rotating speed of numerical controller set and display main shaft, while making main shaft drives workpiece rotation turning, thimble can withstand the end of workpiece and with the turning of workpiece synchronous rotary, make the stable rotation of workpiece energy, then with cutter, the workpiece of rotation is carried out to machining.

Existing thimble structure is as shown in Fig. 1 of No. 242799 " the fine-tuning structure of thimble " new patent case of TaiWan, China patent announcement, with the thimble crown of axle front end pointed cone shape, to lean on the heart hole, top of workpiece end, but aforementioned existing thimble structure judges that owing to lacking tail stock leans the whether suitable foundation of pressure of workpiece, therefore top easily makes workpiece skid during pine very much to cause the wearing and tearing of thimble head or cause workpiece centre skew that turning is produced unstable, just can cause thus raising and the not good puzzlement of processing precision of processing cost.

Summary of the invention

Because the push pin device of existing CNC lathe is not adjusted the suitable foundation that tail stock leans workpiece pressure, when therefore top is too loose, easily make workpiece skid and cause the wearing and tearing of thimble head or cause workpiece centre skew to make turning produce the shortcomings such as unstable.For this reason, the present invention detects the means of thimble rotating speed to set up the push pin device of a tool rotating speed demonstration, coordinate CNC lathe numerical controller to show the rotating speed of main shaft, operator is had and adjust the foundation that tail stock leans workpiece pressure, make the rotating speed of main shaft and the rotating speed of axle consistent, reach push pin device and can with suitable pressure, lean via adjustment the effect of workpiece.

For achieving the above object, the invention provides the push pin device that a kind of tool rotating speed shows, be provided with:

One top heart handle, it is the straight tube body extending along front and rear direction, at the leading section of this top heart handle and the part of leading section rear side, respectively form a head and a shank, in the forward and backward position of this head inner peripheral surface, set firmly respectively a fore bearing and a thrust bearing, at this head outer peripheral face, run through an installation hole inwardly, at the inner peripheral surface of this shank, set firmly a rear bearing;

One axle, is located in fore bearing, thrust bearing and rear bearing along front and rear direction, and the front end of this axle stretches out the front end of this top heart handle and forms a thimble head, and the peripheral part over against this installation hole the inner in the middle of this axle sets firmly a sensor block; And

One detecting display unit, at the installation hole of this top heart handle, place and fix an inductor, the inner that this inductor stretches in this top heart handle forms an induction end, with this induction end, detect this sensor block and within the unit interval, rotate the number of times passing through, in the outer end of this inductor, connect an electric wire, with this electric wire, connect a tachometer, with this tachometer, show the rotating speed of this axle.

The push pin device that described tool rotating speed shows, wherein, described installation hole is screw, described inductor screw thread is fixed in this installation hole.

When the present invention uses, be the shank of top heart handle to be arranged on to the tailstock of lathe, and the thimble crown of axle front end is leaned against to the heart hole, top of workpiece end, when the main shaft of lathe drives workpiece rotation turning, meeting interlock thimble axle synchronous rotary, now can be by the induction end detecting sensor block of inductor and the rotating speed of thimble axle, make operator can compare thimble axle and lathe spindle between rotating speed drop, judge whether thimble head is to lean workpiece with suitable pressure, if pointed cone is suitable against the pressure of workpiece, the rotating speed that thimble axle is rotated should be consistent with the rotating speed of lathe spindle.

In the time will adjusting the thimble crown by the pressure of workpiece, by adjusting before tail stock, the mode of rear position is adjusted, when the rotating speed of thimble axle is slack-off, representative top is pine too, can make workpiece skid and cause the wearing and tearing of thimble head or cause workpiece centre skew to make turning generation unstable, now just to adjust the pressure of tailstock, make the rotating speed of thimble axle and the rotating speed of lathe spindle reach consistent, can make thimble axle lean workpiece with optimal pressure, reach and can not cause the wearing and tearing of thimble head or cause workpiece centre skew to make turning produce unsettled situation, can reach the effect that cuts down finished cost and improve processing precision.

Accompanying drawing explanation

Fig. 1 is the stereogram of the preferred embodiment of the present invention;

Fig. 2 is the profile of the preferred embodiment of the present invention;

Fig. 3 is the enforcement schematic diagram of the preferred embodiment of the present invention.

Description of reference numerals: 10-top heart handle; 11-head; 111-fore bearing; 112-thrust bearing; 113-installation hole; 12-shank; 121-rear bearing; 122-rear thread; 20-axle; 21-thimble head; 22-thimble protecgulum; 23-sensor block; 24-nut cap; 30-detects display unit; 311-induction end; 32-electric wire; 33-tachometer; 21A-pointed cone; 40-tailstock; 41-workpiece.

The specific embodiment

The present invention is the push pin device that a kind of tool rotating speed shows, preferred embodiment as shown in Figure 1 and Figure 2, and the structure of this push pin device comprises:

One top heart handle 10, along front, rear is to the straight tube body extending, leading section at this top heart handle 10 forms a head 11, the part that is positioned at head 11 rear sides at this top heart handle 10 forms a shank 12, in this shank 12, the diameter of outer peripheral face is all less than in head 11, the diameter of outer peripheral face, before head 11 inner peripheral surfaces, rear position sets firmly a fore bearing 111 and a thrust bearing 112, rear side at head 11 outer peripheral faces vertically runs through an installation hole 113 inwardly again, this installation hole 113 is screw, inner peripheral surface in the middle of shank 12 sets firmly a rear bearing 121, this rear bearing 121 is needle bearing, inner peripheral surface in shank 12 rear ends forms a rear thread 122 again.

One axle 20, for the straight-bar body extending along front and rear direction, this axle 20 is arranged in top heart handle 10 and is set in fore bearing 111, thrust bearing 112 and rear bearing 121, the front end of this axle 20 is protruding by the front end of top heart handle 10, the front end that stretches out top heart handle 10 in axle 20 forward forms a thimble head 21, if this thimble head 21 of this preferred embodiment is dismountable thimble heads, and the present invention is made as thimble head 21 disassembling and replacing type except preferred embodiment, also thimble head 21 can be made as to the pointed cone shape that can not change, the present invention is not limited at this; Between the inner peripheral surface of head 11 front-end edges and the side face of thimble head 21 end edges, be provided with a thimble protecgulum 22, at the middle peripheral part over against installation hole 113 the inners of axle 20, set firmly a sensor block 23, if this sensor block 23 of this preferred embodiment is metal derbies, again at the rear thread 122 of shank 12 in conjunction with a nut cap 24.

One detecting display unit 30, installation hole 113 screw threads at top heart handle 10 are fixed an inductor 31, as this preferred embodiment, this inductor 31 is the proximity switch that can respond to metal derby, the inner that this inductor 31 stretches in top heart handle 10 forms an induction end 311, with induction end 311 detecting sensor blocks, in 23 unit interval, rotate the number of times passing through, it is the rotating speed of axle 20, in the outer end of inductor 31, connect an electric wire 32, with electric wire 32, be electrically connected the tachometer 33 of an outside, with tachometer 33, show the rotating speed of the axle that inductor 31 detects.

The present invention is except aforementioned preferred embodiments, that installation hole 113 is made as beyond screw, also installation hole 113 can be made as to slotted hole, make inductor 31 chimeric or otherwise fixing at installation hole 113, the means that so place stationary induction apparatus 31 change the present invention and are not limited at this.

When the present invention uses, as shown in Figure 1 to Figure 3, the shank 12 of top heart handle 10 to be arranged on to the tailstock 40 of lathe, and at the thimble head 21 of axle 20 front ends in conjunction with a pointed cone 21A, pointed cone 21A is leaned in workpiece 41 heart holes, end top, when main shaft when rotation of workpiece 41 with lathe, can together drive axle 20 synchronous rotaries, the mode that now can detect sensor blocks 23 by the induction end 311 of inductor 31 is detected the rotating speed of axle 20 and is presented at tachometer 33, so, make operator can compare the rotating speed drop of axle 20 and lathe spindle, whether suitably judge that pointed cone 21A leans the pressure of workpiece 41, if it is suitable that pointed cone 21A leans the strength of workpiece 41, the rotating speed that axle 20 is rotated should be consistent with the rotating speed of lathe spindle.

During adjustment, operator is by the mode of adjusting the forward and backward position of tailstock 40, the pointed cone 21A that changes axle 20 leans the pressure of workpiece 41, when the position of adjustment tailstock 40 makes the rotating speed of axle 20 and the rotating speed of lathe spindle reach consistent, can make axle 20 lean workpiece with optimal pressure, reach the effect that cuts down finished cost and improve processing precision.

Claims

1. the push pin device that tool rotating speed shows, is characterized in that, comprising:

2. the push pin device that tool rotating speed according to claim 1 shows, is characterized in that, described installation hole is screw, and described inductor screw thread is fixed in this installation hole.