CN2058977U

CN2058977U - Electric controlling error repairing instrument for micrometer

Info

Publication number: CN2058977U
Application number: CN 89220210
Authority: CN
Inventors: 吴建华
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-11-30
Filing date: 1989-11-30
Publication date: 1990-07-04

Abstract

The utility model relates to a motor-driven tool which is used for checking the indication error of the micrometer in particular. In the utility model, a vertical guide post is arranged on a machine base; a gripping mechanism is installed on the guide post; an axial force application device is a weight dropper structure which is vertically mounted. The utility model is chucked upright so that the finishing process is carried out on the extension line of the measuring line; various factors which are adverse to the finishing process is eliminated, and the axial force application is stable and consistent. The repair rate to the micrometer is more than 98%; the accuracy can reach the fat zero level; the periodical stability of the accuracy is about 12 months; only 5 to 10 minutes is required to repair one micrometer via the utility model.

Description

Electric controlling error repairing instrument for micrometer

The utility model is a kind of power-driven tool that is specially adapted to overhaul the outside micrometer error of indication.

Maintenance to the outside micrometer error of indication, at present still based on craft, it is that arc handle portion accumbency with milscale is installed on the bench vice, clamp one then at the ratchet place and can drive the handwheel devices that ratchet rotates, by manual rotation, and application of force pulling handwheel vertically, make ratchet rotate the cutting down of realizing the accurate screw rod working surface of milscale repeatedly having under the responsive to axial force, acting force instability when this mode is ground, efficient is low in addition, labour intensity is big.In recent years existing electronic servicing machine, but its working method is unanimous on the whole with manual operations, arc handle portion accumbency is installed on the clamp place of support, drives dial, ratchet rotation with motor by gearing, and its axial force is applied on dial, the ratchet by the spring structure that an end is fixed on the support.Though electronic servicing machine has alleviated labour intensity, but it and the same following weak point that still exists hand-manipulated: 1, station is unreasonable, horizontal being installed, the screw rod of milscale, ratchet-wheel gear and jig etc. are under its action of gravity like this, naturally sagging, the screw rod axial line tilts, and forms the pitch angle between horizontal axis, can not get rid of theory and method error in maintenance; Axial force instability when 2, grinding, the variation because the length variations of work medi-spring, the corresponding axial force that produces also are directly proportional can not be constant, the operate as normal dynamometry gap of running counter to error of indication Changing Pattern and milscale is bigger, is difficult to control in the operation; 3, repair rate is low and precision stability is poor, and repairing a chi at present often needs 8-16 hour, and repair rate only is 10%, within its stable accuracy phase 1-2 month, do not reach the operating period more than 6 months of standard-required, often cause flase drop in the use, product rejection; 4, rehabilitation expense height, and technology, economic benefit are lower, though a large amount of milscale through maintenance, because precision does not reach request for utilization, is scrapped in a large number.

The purpose of this utility model is to avoid weak point of the prior art, and a kind of influence of energy method for removing error, the outside micrometer error of indication servicing machine product that effectively overhauls are provided.

Can realize the purpose of the technical program by following measure.The vertical guide pillar is installed on support, gripping mechanism is installed on the guide pillar, make milscale be installed in the gripping mechanism vertical the grinding along scale mark direction vertical; The axial force distribution device is the constant force structure that vertical is installed.

Below in conjunction with accompanying drawing, embodiment the content of the technical program is described in further detail.

Fig. 1, automatically controlled outside micrometer error of indication servicing machine synoptic diagram

Fig. 2, driving circuit figure

Among the figure: 1, guide pillar; 2, jib; 3,4,13, tightening jackscrew; 5, cutting ferrule; 6, driving lever; 7, dial pin; 8, weight; 9, dial (big belt pulley); 10, locating sleeve; 11, support; 12, motor; 14, milscale.

Lead (1) vertical and be installed on the support, form the benchmark of gripping mechanism installation, vertical station, it vertically is installed milscale in order to change the chucking orientation of gripping mechanism to milscale, realizes the vertical cutting down to milscale screw rod working surface.Guide pillar is the smooth shaft member.

Have on the jib (2) with guide pillar (1) and be movingly mounting hole, gripping mechanism is installed on the guide pillar by jib, jib can move up and down on guide pillar and planar rotate around guide pillar, to adapt to gripping mechanism to the be installed adjustment needs of position of milscale, jib (2) is mounted on the guide pillar with jackscrew (3).In the gripping mechanism, pressing plate is the jib move left and right relatively, and is to adjust the installation site of the relative gripping mechanism of milscale, with jackscrew (4) that milscale (14) card is firm between pressing plate and jib at correct position.

The axial force distribution device is the weight structure that vertical is installed, and the hammer (8) that hangs down is connected with cutting ferrule by dialling pin (7) in cutting ferrule (5), and promptly weight (8) and cutting ferrule (5) are connected on the same axial line, with constant action of gravity on cutting ferrule.The hammer stem of weight (8) passes core, the hammer stem that dial (9) is a big belt pulley and does not contact mutually with the dial core, and in locating sleeve (10), motor (12) drives dial by belt transmission and rotates dial by Bearing Installation; Dial pin (7) one ends and be fixed on the cutting ferrule (5), the other end contacts with driving lever (6), and the driving lever end is connected with dial.Dial rotates, then driving lever, group pin band cutting ferrule (5) and dial are done to rotate synchronously, are subjected to the vertical action of gravity of vertical hammer (8) on the while cutting ferrule.

The reometer (A) that shows moment variations (load variations) is housed in its driving circuit, and as shown in Figure 2, it can detect the quality condition of milscale screw rod working surface more intuitively, promptly indicates the position that causes the error of indication qualitatively.When operating voltage one timing, the variation that is directly proportional with load of the size of electric current, milscale screw thread working surface wearing and tearing surface of contact increases, then rub-moment increases, current value is big, otherwise then rub-moment is little, current value is little, by the indicated signal of reometer, can judge the omnidistance homogeneity that cooperates of moment variations, screw rod in the grinding, thereby definite interval range that should grind is avoided backlash, is blindly ground.

During use, in the milscale screw, be coated with earlier lapping compound a little, then with the microdrum of milscale from the cutting ferrule of packing into (5), handle part is between the pressing plate and jib of gripping mechanism, fastening jackscrew 13, tightening jackscrew (4) must guarantee when fastening that the measurement axial line of milscale overlaps consistent with the dial axial line again; Starter motor just can grind the milscale screw rod under the effect of certain axial tension.By the moment variations situation that reometer reflected, just can carry out autotelic grinding repeatedly again to the local interval range of screw rod.Under the situation of known lapping compound granularity, weight quality, just can survey out 1 micron error of average elimination, required up grinding number of times.

The relative prior art of the utility model has following advantage:

1, vertical being installed, make that finishing process carries out at the extended line of slotted line, complete application Abbe's principle, got rid of the various factors that do not do well out of finishing process, i.e. the impact of theoretical error and method error;

2, in the whole finishing process process, the axial force distribution stable and consistent simulates the transformational relation (cooperating uniformity) of moment and electric current, namely when operational forces is constant, and the transformational relation of operating frequency and Length Quantity.

3, to the repair rate of the milscale error of indication more than 98%, precision reaches super zero level; The precision stability of period is about 12 months; Average maintenance one was required working time 5-10 minute of chi.

Claims

1, a kind of milscale error of indication servicing machine, it is by gripping mechanism, motorized motions whirligig, and axial force distribution device and support are formed, and it is characterized in that: the vertical guide pillar is housed on the support, and gripping mechanism is installed on the guide pillar; The axial force distribution device is the weight structure that vertical is installed.

2, servicing machine as claimed in claim 1, it is characterized in that: gripping mechanism is axis hole movingly, be mounted on the guide pillar with jackscrew by jib (2) and vertical guide pillar (1), the weight structure that vertical is installed is connected with cutting ferrule by dialling pin (7) in cutting ferrule (5), with action of gravity on cutting ferrule.

3, the servicing machine shown in claim 1,2 is characterized in that: the reometer (A) that shows moment variations (load variations) is housed in its driving circuit.