CN2188762Y

CN2188762Y - Portable durometer

Info

Publication number: CN2188762Y
Application number: CN 93239912
Authority: CN
Inventors: 王全; 葆鸿志; 左演生; 李惠娥; 崔健
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 1993-12-23
Filing date: 1993-12-23
Publication date: 1995-02-01
Anticipated expiration: 2003-12-23

Abstract

The utility model relates to a portable durometer, and belongs to the testing tool for the hardness of the metal material. The utility model is characterized in that a load mechanism is composed of a spring, a retainer ring and an external threaded ring which are orderly pressed on the spring, a cup sleeve which is positioned under the spring, a main shaft which is positioned on the center lines and is sheathed on a sleeve barrel, and a press head sleeve which are orderly connected with the main shaft; an unloading mechanism is composed of a sleeve barrel, a handle and a ring sleeve which are respectively connected with the sleeve barrel internally and externally, a shaft sleeve which is positioned between the ring sleeve and the cup sleeve, a pin which penetrates through each sleeve, a spring which is clamped between the ring sleeve and the shaft sleeve, and a hollow screw which is provided with an inner shoulder, sheathed on the main shaft and connected with the cup sleeve; an indication mechanism is composed of a measuring lever which is contacted with the upper end of the main shaft in eccentricity and an indicator; the utility model is provided with a device which protects the press head. The utility model has the functions that the utility model carries out the nondestructive testing on the large test piece; the portability is convenient; the utility model has the Brinell hardness and Rockwell hardness measurements.

Description

Portable durometer

A kind of portable hardometer belongs to the metal material hardness tools for measurement.

Bu Shi and Rockwell hardometer volume commonly used at present are bigger, and inconvenience is moved and is difficult to big test specimen is carried out nondestructive testing.

The purpose of this utility model is to provide a kind of portable hardometer that can carry out Bu Shi and rockwell hardness testing function simultaneously and can do the non-destructive hardness test to big test specimen.

Of the present utility model being characterised in that: it is a kind of portable cloth that uses spring to make load cell, Rockwell hardometer, its load mechanism is by load spring 7, be pressed in the spring collar 15 of its upper end, the external thread ring 14 that is used for fixing this back-up ring, glass holder 12 with 7 times end in contact of load spring, be positioned at glass holder 12, load spring 7, on the center line of spring collar 15 and external thread ring 14 and be enclosed within main shaft 9 in the axle sleeve 10, be positioned at the pressure head 3 of main shaft 9 lower ends and be enclosed within outside the pressure head 3 and the pressure head that is threaded with axle sleeve 10 lower ends cover 2 formations, add unloading mechanism by sleeve 18, be pressed in the contacted ring set 19 of interior shoulder on handle 20 and sleeve 18 tops on the sleeve 18 perisporium steps, axle sleeve 10 between ring set 19 and glass holder 12, pass ring set 19, the pin 13 of axle sleeve 10 and glass holder 12, be clipped in the spring 7 on ring set 19 lower surfaces and the axle sleeve 10 outer step surfaces and have in shoulder and to be enclosed within main shaft 9 outer and cored screw 11 that is connected with glass holder 12 lower thread constitutes, its indicating mechanism by with main shaft 9 upper ends mutually eccentric contact measurement lever 16 and and the indicator 17 of its mechanical connection constitute.In addition, it also has a filler ring that oil groove 6 is arranged 5 that is overlapping axle sleeve 10 in spring 7 lower ends by the spring baffle ring 8 that contacts with the leave from office terrace of axle sleeve 10, with its inboard contacted spring 7, holder and blocking with nut 4 and is threaded with filler ring 5 and is enclosed within the protective device that the pressure head protective sleeve 1 outside the pressure head 3 constitutes.Ask for an interview Fig. 1.

In order in conjunction with the embodiments the utility model to be done detailed description below, show as follows employed accompanying drawing number of present specification and title brief introduction:

Fig. 1: portable hardometer longitudinal diagram.

Embodiment:

Ask for an interview Fig. 1.Its each dash number as shown in Figure 1.This is the structural drawing of Rockwell hardometer.When off working state, tighten external thread ring 14, so that the compression of load spring 7 regulates cored screw 11 and make its load about 10kg, pressure head 3 dropped out pressure head and overlapped 2 lower end certain distances this moment.When carrying out hardness test, sclerometer is placed on the test specimen, two handles 20 about pushing with hand, sleeve 18 just moves down.Because when off working state, the spring 7 that adds in the unloading mechanism also is in pressured state, and stressed greater than 10kg, thereby ring set 19 upper ends are closely contacted with sleeve 18 interior shoulder faces, make the last end in contact of pin 13 and glass holder 12 internal chutes.At the trial, ring set 19 moves down with sleeve 18 under handle 20 effects, and the chute of pin 13 on axle sleeve 10 that is fixed on the ring set 19 slided, and glass holder 12 is also moved down under 7 effects of load spring.At this moment, contact with the chute upper end of glass holder 12 because the acting force that adds unloading mechanism medi-spring 7, still can guarantee pin 13 still greater than 10kg, so pressure head 3 begins to be pressed into the test specimen surface, but the degree of depth is micro-.At this moment, pressure head cover 2, axle sleeve 10, cored screw 11 and indicator 17 all produce relative displacement with main shaft 9 and pressure head 3, make the pointer of indicator 17 begin to walk about.In case moving down of glass holder 12 makes the interior shoulder face of the cored screw 11 that is fixed in its bottom contact with the shoulder face of main shaft 9, the decrement of load spring just reaches pre-provisioning request, produce the load of 10kg, act on the test specimen surface by main shaft 9 and pressure head 3, be the hardness number of test specimen at this moment shown in the pointer of indicator 17.At this moment, if increase pressure again, the spring 7 that adds in the unloading mechanism just continues pressurized, ring set 19 just drives pin 13 to be continued to move down in the chute of axle sleeve 10, contact with the chute lower end of axle sleeve 10 until pin 13, if it is afterburning again, axle sleeve 10 just drives pressure head cover 2 and descends with respect to main shaft 9 and pressure head 3, pressure head cover 2 is contacted with the test specimen surface, thereby make unnecessary power act on the test specimen surface by pressure head cover 2, thereby guaranteed that the 10kg load can correctly put on the test specimen surface, also guaranteed the steady display of indication numerical value.At this moment, withdraw the pressure that is applied on the handle 20, under the effect of each spring 7, sclerometer just restores to off working state.The effect of protective device medi-spring 7 is to have certain resilience leeway, the purpose of pressure head protective sleeve 1 to be that then it can prevent that pressure head 3 is by damage when being in off working state when pressure head cover 2 is descended.

If when doing the Brinell tester use, as long as pressure head 3 is changed into spherical steel pressure head, simultaneously, the 2 also corresponding replacings of pressure head cover.

Wherein, indicator 17 is the general clock gauges through transforming.

Evidence: under the 10kg load, its indicating accuracy is ± 2 stiffness units for Rockwell's hardness, is ± 5% for Brinell hardness, has satisfied request for utilization well.

Claims

1, a kind of portable hardometer, contain load, add off-load and each mechanism of indication and annex thereof, it is characterized in that: it is a kind of portable cloth that uses spring to make load cell, the Rockwell Hardness meter, its load mechanism is by load spring (7), be pressed in the spring collar (15) of its upper end, the external thread ring (14) that is used for fixing this back-up ring (15), glass holder (12) with end in contact under the load spring (7), be positioned at glass holder (12), load spring (7), on the center line of spring collar (15) and external thread ring (14) and be enclosed within main shaft (9) in the axle sleeve (10), be positioned at the pressure head (3) of main shaft (9) lower end and be enclosed within pressure head cover (2) formation that pressure head (3) is outer and be threaded with axle sleeve (10) lower end; Add unloading mechanism by sleeve (18), be pressed in the handle (20) on sleeve (18) the perisporium step, the contacted ring set of interior shoulder (19) with sleeve (18) top, be positioned at the axle sleeve (10) between glass holder (12) and the ring set (19), pass ring set (19), the pin (13) of axle sleeve (10) and glass holder (12), be clipped in the spring (7) on ring set (19) lower surface and the outer step surface of axle sleeve (10) and have in shoulder and be enclosed within the cored screw (11) that main shaft (9) outside is connected with glass holder (12) lower thread and constitute, indicating mechanism by with main shaft (9) upper end mutually the measurement lever (16) of eccentric contact reach and the indicator (17) of its mechanical connection is formed.

2, portable hardometer according to claim 1 is characterized in that: it also has a filler ring that oil groove (6) are arranged (5) that is overlapping axle sleeve (10) in spring (7) lower end by the spring baffle ring (8) that contacts with axle sleeve (10) leave from office terrace, with its inboard contacted spring (7), holder and blocking with nut (4) and is threaded with filler ring (5) and is enclosed within the protective device of pressure head protective sleeve (1) formation outside the pressure head (3).

3, portable hardometer according to claim 1 is characterized in that: the described pressure head (3) that is used for brinelling is a spherical steel pressure head that is connected with main shaft (9).