CN202885692U

CN202885692U - Ball end micrometer

Info

Publication number: CN202885692U
Application number: CN 201220490453
Authority: CN
Inventors: 刘巨鹏; 任小星
Original assignee: MCC SFRE Heavy Industry Equipment Co Ltd
Current assignee: MCC SFRE Heavy Industry Equipment Co Ltd
Priority date: 2012-09-24
Filing date: 2012-09-24
Publication date: 2013-04-17
Anticipated expiration: 2022-09-24

Abstract

The utility model discloses a ball end micrometer, wherein the micrometric screw of a micrometer and the inner end socket of an anvil block are respectively provided with a ball end, the diameter d of the ball end is determined according to the shape and size of a dovetail guide rail, d is more than or equal to 2/3h, the h represents the height between the upper surface of the saddle of the dovetail guide rail and a plane, and the ball end is connected with the micrometric screw and the anvil block through common fine threads. The ball end micrometer is used for measuring the parallelism of the dovetail guide rail of a machine tool, and a matched ball end is selected from ball ends with standard sizes according to requirements, thereby being convenient in use, simple in operation, above all avoiding secondary error caused by indirectly measuring the parallelism of the guide rail through a round rod, and being relatively high in measuring precision.

Description

The bulb milscale

Technical field

The utility model belongs to machine maintenance and the technical field of repairing facility, and relates to a kind of bulb milscale.

Background technology

Dovetail guide is accurately reliable with its stable drive, location, is used widely at many lathes.In the daily servicing and repairing of lathe, particularly when the lathe overhaul, each guide rail on the lathe all will carry out the measurement of running precision and geometric accuracy before overhaul, make the overhaul scheme according to data and error that reality detects, and then carry out concrete corresponding overhaul.In this process, the measurement of the dovetail guide depth of parallelism becomes a thorny technical matters because of difficult measurement that seem without special measuring tool.

Now take C620 lathe saddle dovetail guide as example, its depth of parallelism is to guarantee that the knife rest transverse shifting is to the key factor of spindle centerline verticality.As shown in Figure 1, generally, the parallelism error on dovetail guide face 3 and plane 4 is not more than 0.02mm.Measuring method under the prior art condition is: measuring two cylindrical rods are placed on the dovetail guide two ends, measure at two ends respectively with common outside micrometer, the difference of reading that records for twice is parallelism error.

Measuring the deficiency that exists with said method comprises:

1) two cylindrical rods that use in the measurement will be through accurately processing, and the dimensional accuracy of himself and form accuracy requirement are very high, and the mismachining tolerance of cylindrical rod itself can cause measuring error;

The line that need guarantee milscale two measuring junctions when 2) measuring is simultaneously vertical with two cylindrical rod buses and screw hole center line.Because be indirect measurement, add operation and reading error that different manual action differences cause, certainly will cause cumulative errors to increase.

Summary of the invention

The purpose of this utility model provides a kind of bulb milscale, when the mensuration that has overcome prior art is measured the dovetail guide parallelism precision, is subjected to artificially to move difference and instrument Accuracy, the problem that measuring error is large.

The technical scheme that the utility model adopts is, a kind of bulb milscale is respectively micrometric screw and anvil block at the chi frame two ends of milscale, is separately installed with a bulb in the inner termination of micrometric screw and anvil block.

Bulb milscale of the present utility model is further characterized in that:

The diameter d of described bulb is determined according to dovetail guide shape and size, and d 〉=2/3h, and h is the height of the upper surface anomaly face of dovetail guide saddle.

Described bulb connects with adopting common fine thread being connected of micrometric screw and anvil block.

The beneficial effects of the utility model are, are used for the precision of lathe dovetail guide is carried out Measurement accuracy, and are simple in structure, be convenient to measure; Cumulative errors are less, be convenient to check and correction; Work efficiency and measuring accuracy have greatly been improved.

Description of drawings

Fig. 1 is the synoptic diagram that existing measurement mechanism is measured the dovetail guide parallelism error;

The structural representation of Fig. 2 bulb milscale of the present utility model;

Fig. 3 is the operation chart when adopting the bulb miking dovetail guide depth of parallelism of the present utility model.

Among the figure, 1. milscale, 2. saddle, 3. dovetail guide face, 4. plane, 5. check pole, 6. leading screw seat hole, 7. chi frame, 8. micrometric screw, 9. bulb, 10. bulb, 11. anvil blocks.

Embodiment

As shown in Figure 1, h is the height of the upper surface anomaly face 4 of dovetail guide saddle 2, the milscale 1 that existing mode adopts when measuring, that the depth of parallelism and the surface smoothness that inner termination at micrometric screw 8 and anvil block 11 is separately installed with 5, two checks of check pole pole 5 can directly affect final measuring accuracy.

Such as Fig. 2, shown in Figure 3, the structure of the utility model bulb milscale is to be separately installed with a bulb 9 at the chi frame 7 two ends micrometric screws 8 of milscale 1 and the inner termination of anvil block 11.Bulb 9 connects with adopting common fine thread being connected of micrometric screw 8 and anvil block 11 in addition, and bulb 9 can be changed at any time according to the size of dovetail groove.

The diameter d of bulb 9 is determined according to dovetail guide shape and size, and d 〉=2/3h.The d rounding is become standard series: such as 10mm, 15mm, 20mm, 25mm equidimension, the convenient selection later on supports the use.For example, select the outside micrometer that measurement range is 50-75mm, getting the bulb diameter during making is 10mm, determines that its zero-bit is 50mm.If zero-bit just becomes 85mm when changing a diameter and be 15 bulb.

Bulb milscale of the present utility model on the milscale basis of prior art, is processed into the common fine thread supporting with bulb with original anvil block 11 ends and micrometric screw 8 ends, and the bulb 9 of supporting selection corresponding size is threaded and gets final product.

As shown in Figure 3, bulb milscale of the present utility model is used for measuring the lathe dovetail guide depth of parallelism, and selection is supporting in the bulb of modular size as required, is set in anvil block 11 ends and micrometric screw 8 ends, can realize accurate measurement.Not only easy to use, simple to operate, the more important thing is and avoided indirectly with the pole second order error that measurement brings to guide rail parallelism that measuring accuracy is higher.

Claims

1. bulb milscale is characterized in that: be respectively micrometric screw (8) and anvil block (11) at chi frame (7) two ends of milscale (1), be separately installed with a bulb (9) in the inner termination of micrometric screw (8) and anvil block (11).

2. bulb milscale according to claim 1 is characterized in that: the diameter d of described bulb (9) is determined according to dovetail guide shape and size, and d 〉=2/3h, and h is the height of the upper surface anomaly face (4) of dovetail guide saddle (2).

3. bulb milscale according to claim 1 is characterized in that: described bulb (9) adopts with being connected of micrometric screw (8) and anvil block (11) and is threaded.