CN103245267B - The instruments of inspection of jigsaw size and the method for inspection in sleeper steel mould - Google Patents

Abstract

The present invention discloses the instruments of inspection and the method for inspection of jigsaw size in a kind of sleeper steel mould, and this instruments of inspection includes horizontal cross plate and the limit projection (1) being located at lower end, both sides around and the middle projection (2) at middle part；Described limit projection (1) is less than 0.05 with the flatness of the measuring surface of middle projection (2), and the measuring surface of said two limit projection (1) and middle projection (2) depth of parallelism each other is less than 0.1；The discrepancy in elevation (h+1) mm of described limit projection (1) and middle projection (2) selects according to punching block design size.Use the present invention, it is possible to simplify the measurement process of sleeper steel mould, and improve certainty of measurement.

Description

Inspection tools and inspection methods for panel size in sleeper steel formwork

technical field

The invention relates to the technical field of prestressed concrete sleeper steel formwork, in particular to a test tool and a test method for the panel size in the sleeper steel formwork, and can also be used in other fields where it is difficult to directly measure the relative height difference of an object and a certain accuracy needs to be controlled.

Background technique

In the production of sleepers, there is an inspection item of the distance from the upper row of steel wires to the top. This item is an item that often exceeds the standard in the inspection indicators of sleepers. The main factor affecting this size on the sleeper steel mold is the height of the middle panel. Traditional sleepers The inspection of the height of the jigsaw in the steel mold is all measured by the string line (at the tension center of the steel mold) and the method of using a steel ruler. The following problems existed in the actual inspection process:

1) When measuring with a straight ruler after drawing the string, the space is limited due to the size of the steel mold, and the line of sight is difficult to be perpendicular to the distance measurement, which will cause a certain visual error; in addition, when the string is fixed, there will also be a certain error, which will accumulate. large error.

2) The scale of the steel ruler is generally 1.0mm, and the smallest is only 0.5mm, which has a certain lack of measurement accuracy.

3) Since the string wire can only be pulled in the middle of the longitudinal shell of the steel formwork, if the middle panel is tilted, it cannot be measured, and only the center line position of the steel formwork panel can be measured.

4) When inspecting the strings, the strings must be fixed according to other benchmarks, and then the height of the panel in the steel mold should be detected based on the strings. The inspection procedure is complicated and time-consuming.

5) The crown of the steel mold should be considered in the inspection of the stay string, and the crown of each steel mold has a certain difference. According to the uniform standard inspection, the size error is relatively large.

6) The middle jigsaw is mainly used to control the distance from the upper row of steel wires to the top plane of the sleeper (that is, the plane of the steel mold shell) in the finished product inspection item of the sleeper. When measuring the strings, the strings to the There may be two opposite extremes between the height of the panel in the steel mold and the height of the chord line to the shell of the steel mold.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a test tool and test method for the panel size in the sleeper steel mold, so as to simplify the measurement process and improve the measurement accuracy.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A tool for inspecting the panel size in a sleeper steel mold, the inspection tool includes a horizontal horizontal plate, side bumps 1 arranged at the lower ends of the left and right sides and a middle bump 2 in the middle; the side bumps 1 and the middle bumps The flatness of the measurement surface of the block 2 is less than 0.05, and the parallelism between the measurement surfaces of the two side bumps 1 and the middle bump 2 is less than 0.1; the height difference between the side bump 1 and the middle bump 2 is h+1; where, the unit of height difference is mm.

Wherein: the height difference h+1 between the side bump 1 and the middle bump 2 is determined according to the design size of the steel mold.

When the inspection tool is used for steel mold maintenance, the size of the height difference h+1 is h±0.1mm.

The total length L of the horizontal horizontal plate, its minimum length is greater than the distance between the two factory marks 5 of the steel formwork shell 6, and its maximum length is less than the distance between the two 1:40 gradient sections of the steel formwork shell 6 distance.

The total length L of the horizontal horizontal plate, its minimum length is greater than the distance between the two factory marks 5 of the steel mold shell 6; if the steel mold shell 6 has no 1:40 slope section, its maximum size is not limited by This limit.

A method for inspecting the panel size in a sleeper steel form, the method comprising:

A, when using the inspection tool described in claim 1 to check the sleeper rail steel mold, align the jigsaw plate in the steel mold with the middle bump, and the two side bumps fall respectively in the two steel mold shells on the left and right, and match with the steel mold The shell planes are attached, and at this time, feeler gauges of different thicknesses are used to detect the gap between the middle bump and the middle panel of the steel mold;

B. Control according to the height h between the top surface of the jigsaw panel in the steel mold and the steel mold shell, and the qualified standard for the thickness of the feeler gauge when measuring is 0.5-1.5mm; that is, the gap size after measurement is between 0.5-1.5mm is qualified;

C. If the size of the gap is between 0 and 0.5mm, or the side bump is raised after the tool falls into the steel mold, it means that the panel in the steel mold is too high and exceeds the allowable error range; if the gap size is greater than 1.5mm, then It shows that the panel size in the steel mold is too low, which also exceeds the allowable error range.

Wherein: step C further includes: during the detection process, the gaps at the four corners of the middle jigsaw can be measured at the same time, so as to prevent the middle jigsaw of the steel mold from being in a tilted state.

The inspection tool and inspection method for the panel size in the sleeper steel mold provided by the present invention have the following advantages:

The method of the present invention cooperates with the inspection tool, which can overcome the cumulative error in string-type measurement, improve the detection accuracy, effectively prevent the skewing of the panel in the steel mold, and at the same time, the measurement method is closer to the measurement purpose (controlling the deviation of the rib position), During the measurement process, there is no need to consider the crown degree and specific height of the steel mold. The detection operation is simple and fast, which can effectively improve the detection efficiency. It can be widely used in the fields of sleeper steel mold acceptance, steel mold manufacturing and maintenance, and can also be used for difficult direct measurement. Other areas where the object has a relative height difference and needs to be controlled with a certain degree of precision.

Description of drawings

Fig. 1 is a longitudinal sectional view of the jigsaw puzzle size inspection tool in the present invention;

Fig. 2 is a plan view of the jigsaw size inspection tool in the present invention;

Fig. 3 is a schematic diagram of the inspection process of the inspection tool of the present invention.

[Description of main components/component symbols]

1: side bump

2: Middle bump

3: Jigsaw in the steel mold

4: Chamfering block at the end of the shell

5: Factory standard

6: steel mold shell

7: Rail groove plate.

detailed description

The inspection tool and inspection method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments of the present invention.

Fig. 1 is a longitudinal sectional view of the jigsaw size inspection tool of the present invention, Fig. 2 is a top view of the jigsaw size inspection tool of the present invention, and Fig. 3 is a schematic diagram of the inspection process of the inspection tool of the present invention.

As shown in the figure, the production requirements of the inspection tool are as follows: the inspection tool includes a horizontal horizontal plate and side bumps 1 located at the lower ends of the left and right sides and a middle bump 2 in the middle, the side bumps 1 and The flatness of the measurement surface of the middle bump 2 is less than 0.05, and the parallelism between the measurement surfaces of the three bumps is less than 0.1; the height difference between the side bump 1 and the middle bump 2 is h+1, and the unit is : mm; choose according to the design size of the steel mold, and the error is controlled by ±0.1mm.

When the inspection tool is used for steel mold maintenance, the size of h+1 is directly produced according to h (±0.1mm); the minimum length of the total length L of the horizontal horizontal plate should consider the position of factory standard 5 and the maximum length when designing The 1:40 slope section in the steel mold shell 6 needs to be considered. If there is no sleeper with a 1:40 slope section, this problem does not need to be considered, but it is required not to touch the sleeper groove plate 7. The general principle is that the side bump 1 cannot be pressed on the factory mark 5, nor can it be pressed on the 1:40 slope section, and it must be attached to the steel mold shell.

As shown in Figure 3, when using the inspection tool for steel mold acceptance, use the middle bump 2 of the inspection tool to align the middle panel 3 of the steel mold, and the two side bumps 1 respectively fall on the left and right steel mold shells In 6, it is flatly attached to the shell of the steel mold. At this time, feeler gauges of different thicknesses are used to detect the gap between the middle bump 2 and the middle panel 3 of the steel mold. If it is controlled according to the height h between the top surface of the jigsaw plate 3 in the steel mold and the steel mold shell 6 (allowable error ±0.5mm), the qualified standard for the thickness of the feeler gauge during measurement is ±0.5+1=0.5～1.5mm. After the measurement, the gap size is between 0.5 and 1.5 mm, which is qualified; if the gap size is between 0 and 0.5 mm, or the side bump 1 is lifted after the tool falls into the steel mold, it means that the jigsaw plate 3 in the steel mold is too high , exceeding the allowable error range; if the gap size is greater than 1.5mm, it means that the size of the panel 3 in the steel mold is too low, and it also exceeds the allowable error range. At the same time, the gaps at the four corners of the middle jigsaw can be measured during the detection process, which can prevent the middle jigsaw from being in a tilted state.

As shown in Figure 3, when the inspection tool is used for steel mold maintenance and manufacture, the middle bump 2 of the inspection tool is aligned with the position where the middle panel 3 of the steel mold is to be installed, and the two side bumps 1 fall on the left and right sides respectively. In the steel mold shell 6, fit the plane of the steel mold shell, then adjust the position of the jigsaw plate 3 in the steel mold in the height direction, and finally make it fit with the middle bump 2, and finally align the jigsaw plate in the steel mold 3 and the shell end chamfer block 4 are welded.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (2)

1. the method for inspection of jigsaw size in a sleeper steel mould, it is characterised in that the method includes:

A, the instruments of inspection of use include horizontal cross plate and the limit projection (1) being located at lower end, both sides around and the middle projection (2) at middle part；Described limit projection (1) is less than 0.05 with the flatness of the measuring surface of middle projection (2), and the measuring surface of said two limit projection (1) and middle projection (2) depth of parallelism each other is less than 0.1；The discrepancy in elevation of described limit projection (1) and middle projection (2) is h+1；Wherein, the unit of the discrepancy in elevation is: mm；When tie punching block checked by the described instruments of inspection, with jigsaw in convexity block alignment punching block, two limit projections respectively fall in two steel mold shell in left and right, fit with steel mold shell plane, gap between jigsaw in projection and punching block in now detecting with the clearance gauge of different-thickness；

B, by between jigsaw end face in described punching block to steel mold shell height h be controlled, during measurement, the criterion of acceptability of clearance gauge thickness is 0.5～1.5mm；After i.e. measuring, gap size is qualified between 0.5～1.5mm；

If C gap size is between 0～0.5mm, or instrument falls into a side projections tilting after punching block, illustrates that in punching block, jigsaw is too high, exceedes allowable error scope；If gap size is more than 1.5mm, then in explanation punching block, jigsaw size is on the low side, have also exceeded allowable error scope.

The most according to claim 1, the method for inspection of jigsaw size in sleeper steel mould, it is characterised in that step C farther includes: the gap at four angles of jigsaw in simultaneously can measuring during detection, to prevent jigsaw in punching block to be in heeling condition.