CN205254968U

CN205254968U - Rule and use from centring means in hole

Info

Publication number: CN205254968U
Application number: CN201521122196.8U
Authority: CN
Inventors: 张晓霞; 丁维华
Original assignee: Guizhou Aerospace Wujiang Electro Mechanical Equipment Co Ltd
Current assignee: Guizhou Aerospace Wujiang Electro Mechanical Equipment Co Ltd
Priority date: 2015-12-31
Filing date: 2015-12-31
Publication date: 2016-05-25
Anticipated expiration: 2025-12-31

Abstract

(B, ) the utility model discloses a rule and use from centring means in hole. Including the anchor clamps bodies (1), the anchor clamps body is for cylindrical, and the columniform axle center is equipped with centre bore (2), presss from both sides blind hole (3) that specific outer face of cylinder was equipped with a set of radial equipartition, and the hole bottom of blind hole is equipped with spring (4), has inserted in the blind hole to decide core rod (5), is equipped with guide way (6) on deciding core rod, is equipped with in the guide way uide pin (7), and the uide pin runs through anchor clamps personally experiences sth. Part of the body and guide way sliding connection. The utility model discloses convenient to use, the suitability is strong, improves macroporous marking off speed, lightens workman intensity of labour with traditional approach looks specific energy, improves work efficiency, reduces product cost. Mainly be applicable to the macroporous marking off of foundry goods to and the marking off work in the smart hole under general condition. Multiple specification can be made with the device according to the demand in the aperture of difference to while, only the appropriate decrement of deciding core rod length and spring 4 of need selection can. (B, )

Description

A kind of hole line Self-centering device

Technical field

The utility model relates to a kind of hole line Self-centering device, belongs to the positioning tool technical field of ruling with hole centralized positioning.

Background technology

In machining, usually can run into the processing of foundry goods; And Mechanical processing of casting generally need to first be rule; Conventionally need to rule taking the center of casting hole as benchmark for porose foundry goods, Bing Yici center checks the allowance of relevant die cavity; So must first find out Kong center line, just can draw other dimension line. Generally on part, draw hole bit line and need to draw the center line of both direction (X, Y). Be all first to draw a direction center line under normal circumstances, then draw another direction center line by after 90 ° of part spinnings again, the intersection point of two lines is center, hole. When rule foundry goods profile larger, weight is heavier, casting hole diameter is also larger, part rotation inconvenience, simultaneously because center, hole is space intersection, cannot measure and center, causing Yi Gai center to be that benchmark is drawn concentric circles, cannot check that whether the allowance of existing concentric circles or die cavity is correct.

Utility model content

The purpose of this utility model is, a kind of hole line Self-centering device is provided. To meet the line requirement centered by hole to heavy castings, alleviate labor strength, increase work efficiency, overcome prior art deficiency.

The technical solution of the utility model:

A kind of hole line Self-centering device, comprise clamp body, clamp body is cylindrical, columniform axle center is provided with centre bore, and the external cylindrical surface of clamp body is provided with one group of radial uniform blind hole, at the bottom of the hole of blind hole, is provided with spring, in blind hole, be inserted with centering bar, centering bar is provided with gathering sill, is provided with guide finger in gathering sill, and guide finger runs through clamp body and gathering sill is slidably connected.

In aforementioned Self-centering device, described guide finger is cylindrical sunk screw, and the total length of cylindrical sunk screw is not more than the thickness of clamp body, and the double-screw bolt part of cylindrical sunk screw is two sections, and epimere is polished rod section, and double-screw bolt hypomere is thread segment.

In aforementioned Self-centering device, the pin-and-hole that described guide finger runs through clamp body is divided into two sections, and epimere is step-like unthreaded hole, and hypomere is screwed hole; The thread segment length of cylindrical sunk screw is not more than the length of screwed hole; The large diameter hole degree of depth of step-like unthreaded hole is greater than the thickness of head of screw.

In aforementioned Self-centering device, described blind hole is H8/h7 fit system with centering bar.

In aforementioned Self-centering device, the shape long waist shaped of described gathering sill, gathering sill and polished rod section are H8/h7 fit system.

In aforementioned Self-centering device, described gathering sill length is less than the poor of clamp body radius and place, pin-and-hole center radius of circle.

In aforementioned Self-centering device, described centering pole length is greater than blind hole depth, and the termination that centering bar exposes clamp body is sphere.

In aforementioned Self-centering device, described clamp body thickness is less than 2/3 of hole depth to be rule.

In aforementioned Self-centering device, described spring is same specification, with batch spring.

Compared with prior art, the utility model is easy to use, and applicability is strong, with conventional method phase specific energy improve macropore line speed, alleviate labor strength, increase work efficiency, reduce product cost. Mainly be applicable to the line of foundry goods macropore, and the line work in smart hole under general condition. According to the demand in different apertures, this device can be made to plurality of specifications simultaneously; Only need to select suitable centering pole length and the decrement of Compress Spring.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is schematic appearance of the present utility model.

Being labeled as in figure: 1-clamp body, 2-centre bore, 3-blind hole, 4-spring, the 5-bar of feeling relieved, 6-gathering sill, 7-guide finger, 8-polished rod section, 9-thread segment, the step-like unthreaded hole of 10-, 11-screwed hole, 12-sphere.

Detailed description of the invention

Below in conjunction with drawings and Examples, the utility model is described in further detail, but not as to any restriction of the present utility model.

A kind of hole line Self-centering device, as depicted in figs. 1 and 2: comprise clamp body 1, clamp body 1 is cylindrical, columniform axle center is provided with centre bore 2, and the external cylindrical surface of clamp body 1 is provided with one group of radial uniform blind hole 3, is provided with spring 4 at the bottom of the hole of blind hole 3, in blind hole 3, be inserted with centering bar 5, centering bar 5 is provided with gathering sill 6, is provided with guide finger 7 in gathering sill 6, and guide finger 7 runs through clamp body 1 and is slidably connected with gathering sill 6. Guide finger 7 is cylindrical sunk screw, and the total length of cylindrical sunk screw is not more than the thickness of clamp body 1, and the double-screw bolt part of cylindrical sunk screw is two sections, and epimere is polished rod section 8, and double-screw bolt hypomere is thread segment 9. The pin-and-hole that guide finger 7 runs through clamp body 1 is divided into two sections, and epimere is step-like unthreaded hole 10, and hypomere is screwed hole 11; Thread segment 9 length of cylindrical sunk screw are not more than the length of screwed hole 11; The large diameter hole degree of depth of step-like unthreaded hole 10 is greater than the thickness of head of screw. Blind hole 3 is H8/h7 fit system with centering bar 5. The shape long waist shaped of gathering sill 6, gathering sill 6 is H8/h7 fit system with polished rod section 8. Gathering sill 6 length are less than the poor of clamp body 1 radius and place, pin-and-hole center radius of circle. Avoid cutting and dust to enter clamp body, the slip of impact centering bar. Centering bar 5 length are greater than blind hole 3 degree of depth, and the termination that centering bar 5 exposes clamp body 1 is sphere 12. Clamp body 1 thickness is less than 2/3 of hole depth to be rule. Spring 4 is same specification, with batch spring, guarantees that spring force is identical.

Embodiment

This example is assembly parts, comprises centering bar 5, clamp body 1, spring 4 and guide finger 7. On the face of cylinder of clamp body 1, have 3 uniform blind holes 3, a spring 4 is equipped with in the bottom of each blind hole 3, spring 4 above a centering bar 5 is housed, and three centering bars 5 are isometric. Guide finger 7 is contained on clamp body 1 and through being connected fastening with the screwed hole 11 on clamp body 1 after the gathering sill 6 on centering bar 5. When use, by the tension force of spring 4, centering bar 5 is supported in hole to be rule, now the centre of gyration of clamp body 1 centered by 2 axis.

For the bar 5 that ensures to feel relieved interior capable of expansion and contraction at clamp body 1, blind hole on clamp body 13 is designed to H8/h7 with the cylindrical of centering bar 5 to be coordinated, and there is a gathering sill 6 on centering bar 5, its width dimensions becomes H8/h7 to coordinate with polished rod section 8 cylindricals on guide finger 7, the slip of bar 5 along guide finger 7 of being convenient to feel relieved. Guide finger 7 upper design are cylindric and become H8/h7 to coordinate with gathering sill 6 width on centering bar 5 simultaneously, and bottom is thread segment 9, for centering bar 5 being assemblied on clamp body 1 and can sliding on clamp body 1 and can not come off again. While design, for avoiding cutting and dust to enter clamp body 1, affect the flexible of centering bar 5, spy designs gathering sill 6 on centering bar 5 in the blind hole 3 of clamp body 1 simultaneously, and gathering sill 6 under any circumstance all can not stretch out clamp body 1. For the ease of with the support in hole to be rule, the end of centering bar 5 is designed to spherical; Consider that centering precision spy becomes to be less than 2/3 of hole depth to be rule by centering body Thickness Design. Stressed evenly for the bar 5 of feeling relieved, supporting force is suitable, and the stroke of the bar 5 of need considering when spring 4 designs to feel relieved, selects suitable spring 4 by the decrement of calculating spring 4. While selecting spring, should guarantee that spring is same specification, the spring of same batch of production, to guarantee the elastic force uniformity of spring. In order to adapt to the line demand in multiple aperture, can design the serial Self-centering device of this structure, only the centering length of bar 5 and the decrement of spring 4 need be increased with the increase in line aperture.

Operation principle of the present invention: this device has three isometric centering bars 5, is supported on them in hole to be rule by the tension force of spring 4, and the centre of gyration of clamp body 1 is center, hole. By long gathering sill 6 on three centering bars 5, the bar 5 that makes to feel relieved moves freely along guide finger 7. When spring 4 bar 5 of feeling relieved during in free state just in time moves to fixed point.

When use, first the head of any two centering bars 5 is placed on to the hole wall that needs line hole, Compress Spring 4 is put into hole by another root centering bar 5 again. In the time that line required precision is higher. The plane of available dial gauge levelling clamp body 1, improves clamp body 1 center and hole center superposition degree, then marks required round dimension line with compasses, can detect the allowance of part simultaneously and draw the position line in required hole.

Claims

1. a hole line Self-centering device, it is characterized in that: comprise clamp body (1), clamp body (1) is cylindrical, columniform axle center is provided with centre bore (2), the external cylindrical surface of clamp body (1) is provided with one group of radial uniform blind hole (3), at the bottom of the hole of blind hole (3), be provided with spring (4), in blind hole (3), be inserted with centering bar (5), centering bar (5) is provided with gathering sill (6), in gathering sill (6), be provided with guide finger (7), guide finger (7) runs through clamp body (1) and is slidably connected with gathering sill (6).

2. hole line Self-centering device according to claim 1, it is characterized in that: described guide finger (7) is cylindrical sunk screw, the total length of cylindrical sunk screw is not more than the thickness of clamp body (1), the double-screw bolt part of cylindrical sunk screw is two sections, epimere is polished rod section (8), and double-screw bolt hypomere is thread segment (9).

3. hole line Self-centering device according to claim 2, is characterized in that: the pin-and-hole that described guide finger (7) runs through clamp body (1) is divided into two sections, epimere is step-like unthreaded hole (10), and hypomere is screwed hole (11); Thread segment (9) length of cylindrical sunk screw is not more than the length of screwed hole (11); The large diameter hole degree of depth of step-like unthreaded hole (10) is greater than the thickness of head of screw.

4. hole line Self-centering device according to claim 3, is characterized in that: described blind hole (3) is H8/h7 fit system with centering bar (5).

5. hole line Self-centering device according to claim 4, is characterized in that: the shape long waist shaped of described gathering sill (6), gathering sill (6) is H8/h7 fit system with polished rod section (8).

6. hole line Self-centering device according to claim 5, is characterized in that: described gathering sill (6) length is less than the poor of clamp body (1) radius and place, pin-and-hole center radius of circle.

7. hole line Self-centering device according to claim 6, is characterized in that: described centering bar (5) length is greater than blind hole (3) degree of depth, and the termination that centering bar (5) exposes clamp body (1) is sphere (12).

8. hole line Self-centering device according to claim 7, is characterized in that: described clamp body (1) thickness is less than 2/3 of hole depth to be rule.

9. hole line Self-centering device according to claim 8, is characterized in that: described spring (4) is same specification, with batch spring.