WO2023142571A1

WO2023142571A1 - Positioning mold suitable for grating arch frame machining

Info

Publication number: WO2023142571A1
Application number: PCT/CN2022/128746
Authority: WO
Inventors: 李阳; 李春林; 王东利; 陈刚; 秦岭; 董江辉; 东鹏飞; 张岩刚; 张海涛; 倪金龙; 姜飞; 李博; 王伦; 全萍; 宋天淼; 赵金涛; 苏日乐
Original assignee: 中铁九局集团第三建设有限公司
Priority date: 2022-10-26
Filing date: 2022-10-31
Publication date: 2023-08-03
Also published as: LU506087A1; LU506087B1; CN115781151B; CN115781151A

Abstract

A positioning mold suitable for grating arch frame machining, the positioning mold comprising a base, positioning seats and positioning plates. The plurality of positioning seats are distributed in the length direction of the base at equal intervals. The inner side of the supporting plates are provided with positioning stations corresponding to a grating arch frame and used for placing the grating arch frame. Two lower notches used for bearing a main rib below the grating arch frame are formed below each positioning station. A supporting piece extending to each positioning station is arranged above the positioning station. An upper notch used for bearing the main rib above the grating arch frame is formed in each supporting piece. A radian of a positioning mold is set according to an initial support design requirement of a tunnel; arch bending is performed according to the design radian requirement; a steel frame channel clamp plate is welded on the I-shaped steel base; after the mold is manufactured, the main rib and a splayed rib are placed on the mold to be welded to form the grating arch frame. The structure is simple, the production efficiency is high, and the production error is small.

Description

A Positioning Die Suitable for Grid Arch Processing

technical field

The invention belongs to the technical field of welding production of tunnel support devices, and in particular relates to a positioning mold suitable for grid arch processing.

Background technique

With the continuous development of my country's construction, tunnel engineering has become the most common type of engineering in highway, railway and subway construction. In tunnel construction, in order to ensure its safety, it is often necessary to lay steel grid arches on the tunnel to increase the bearing capacity. The traditional tunnel grid steel frame processing technology is usually realized through simple positioning molds. There are many problems in the steel arch frame produced by this method. It is easy to lose strength and rebound when the main reinforcement is processed into an arc shape. It is not standard, it is difficult to process, and it needs multiple people to work together to complete it. The error of the processed grid steel frame is relatively large, which leads to excessive installation errors, and the overall force of the tunnel is uneven. The grid steel frame is arched and bulky. It is relatively large, and it is not easy to lift and unload the grille steel frame after it is manufactured.

Therefore, it is necessary to provide an improved technical solution for the above-mentioned deficiencies in the prior art.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings in the above-mentioned prior art and provide a positioning mold suitable for grid arch processing.

In order to achieve the above object, the present invention provides the following technical solutions:

A positioning mold suitable for grid arch processing, the positioning mold includes a base, a positioning seat and a positioning plate, the base is an arc-shaped seat, the base is fixed below the positioning seat, and a longitudinal An extended support plate, a plurality of positioning seats are equidistantly distributed along the length direction of the base, and a positioning station corresponding to the grid arch is provided on the inner side of the support plate for placing the grid arch, Below the positioning station, there are two lower gaps for carrying the main ribs below the grid arch, and above the positioning station, there is a supporting piece extending toward the positioning station. There is an upper notch for carrying the main reinforcement above the grid arch;

The two positioning plates are correspondingly arranged at both ends of the base, and are slidably assembled on the base along its length direction so as to abut against the two ends of the grid arch.

Beneficial effects: according to the design requirements of the initial support of the tunnel, the radian of the positioning mold is set, and the arch is bent according to the design radian requirements, and the fixture plate of the steel frame channel is welded on the I-beam base. Placed on the mold and welded to form a grid arch, the structure is simple, the production efficiency is high, and the production error is small. The unloading mechanism is set up to facilitate unloading and reduce the difficulty of hoisting and transshipment.

Description of drawings

Fig. 1 is a schematic diagram of the positioning mold structure;

Figure 2 is a schematic diagram of the assembly of the main reinforcement;

Figure 3 is a schematic structural diagram of the unloading mechanism;

Figure 4 is a schematic diagram of the unloading state.

In the figure: 1. Base; 2. Positioning plate; 3. Supporting plate; 4. Holder; 5. Positioning seat; 6. Unloading seat; 7. Upper baffle; 8. Upper stud; ; 10, 8-shaped ribs; 11, main ribs; 12, lower baffle plate; 13, lower studs; 14, lower limit piece; 15, support piece; 16, screw rod; , lifting rod; 20, upper chute; 21, lower chute.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

As shown in Figure 1-4, a positioning mold suitable for grid arch processing, the positioning mold includes a base 1, a positioning seat 5 and a positioning plate 2, the base 1 is an arc-shaped seat, and its radian is the same as that of the corresponding arch The radians are matched, the lower part of the positioning seat 5 is fixedly connected to the base 1, the upper part is provided with a longitudinally extending support plate 3, a plurality of positioning seats 5 are equidistantly distributed along the length direction of the base 1, and the inner side of the supporting plate 3 is provided with a corresponding grid arch The positioning station of the frame is specifically located on the side close to the corresponding center of the base ring. The specific number and spacing of the support plates 3 are distributed according to the preset spacing between the 8-shaped ribs and other accessories of the grid arch frame. The main ribs 11 are placed in the positioning position. At the station, the grille arch frame is formed by welding, and the four main ribs 11 on the grille arch frame are fixed by the positioning station, so as to be welded. There are two bars under the positioning station for carrying the lower part of the grille arch frame. The lower gap of the main rib 11 is provided above the positioning station with a supporting piece extending toward the positioning station, and the supporting piece is provided with an upper gap for carrying the main rib 11 above the grid arch; the two positioning plates 2 correspond to It is arranged at both ends of the base 1, and is slidably assembled on the base 1 along its length, so as to be in contact with the two ends of the grid arch, so as to align the four main ribs 11 on the same grid arch to ensure welding accuracy. In this embodiment, according to the arch degree of the grid arch, firstly adopt I-20 I-beam to make mold base 1; A steel plate with a width of 20 cm and a height of 50 cm is used as the support plate 3 .

In another optional embodiment, there are two lower gaps, the two lower gaps respectively correspond to the two main ribs 11 below the load-bearing grid arch, the lower gaps have a certain width, and there are two upper gaps, the two upper gaps are respectively Corresponding to the two main ribs 11 above the load-bearing grid arch, the upper gap has a certain width to adapt to the spacing of the main ribs 11 corresponding to different grid arches. The specific width of the upper gap and the lower gap can be 3-5 times the diameter of the main reinforcement 11, and the position and spacing of the main reinforcement 11 can be adjusted to adapt to the spacing of the main reinforcement 11 corresponding to different grid arches, so as to meet the requirements of different spacing requirements of the main reinforcement 11. The grid frame is adjusted; preferably, the support plate 3 extends upwards on the outside to form a positioning station, and the bracket 4 is fixed on the upwardly extending part of the support plate 3 by bolts, and the upwardly extending part of the support plate 3 is set There are a plurality of longitudinally distributed screw holes for adjusting the position of the supporting member 4, thereby adjusting the height of the grid arch to be produced longitudinally.

In another optional embodiment, a detachable lower baffle 12 is provided on the positioning station, and the lower baffle 12 limits the main ribs 11 below the grid arch to the lower gap, and the lower baffle 12 pairs the lower The two main ribs 11 are limited to ensure the stability of the main ribs 11 during the welding process, thereby reducing welding errors. The support is provided with a hinged upper baffle 7, and the upper baffle 7 rotates towards the support to move the grid above the grille. The main ribs 11 are limited in the upper gap, and the upper two main ribs 11 are limited by the upper baffle plate 7 to ensure the stability of the main ribs 11 during the welding process, thereby reducing welding errors.

In another optional embodiment, the side of the lower baffle plate 12 is provided with a glide groove 21 extending radially along the corresponding arc of the base 1. Slider, the two lower sliders can slide along the sliding groove 21, so as to adjust according to the different distances between the main ribs 11, the two lower sliders are screwed to the lower studs 13, and the lower studs 13 are pressed against the main ribs below 11, so that the main rib 11 can be compressed. The side of the upper baffle plate 7 is provided with an upper chute 20 radially extending along the corresponding circular arc of the base 1. The upper chute 20 is preferably a dovetail groove. Two upper sliders are slidably installed in the upper chute 20. The sliders can slide along the upper chute 20 to adjust according to the different distances between the main ribs 11. The upper studs 8 are threaded on the two upper sliders, and the upper studs 8 tighten the upper main ribs 11 downwards. The stud 8 can compress the main reinforcement 11 longitudinally to ensure the stability during the welding process. The upper slider and the lower slider protrude outwards from the upper chute 20 and the lower chute 21 respectively, so as to serve as the installation positions of the upper stud 8 or the lower stud 13 .

In another optional embodiment, the lower end of the lower stud 13 is rotatably connected with a lower limiter 14, and the lower limiter 14 is correspondingly clamped to the main rib 11 below; the lower end of the upper stud 8 is rotatably connected with an upper limiter 9, and the upper limiter 9 corresponds to the main rib 11 above the snap connection. Wherein the upper limiter 9 and the lower limiter 14 are both inverted V-shaped, and the top is connected in rotation, for example, a rotating shaft is arranged above the lower limiter 14, and a sleeve for rotating and connecting the rotating shaft is arranged below the lower limiter 14, and the sleeve and The lower stud 13 is coaxial to achieve rotational connection, and the upper limit member 9 has the same structure, which will not be described again. As the stud is tightened, the main rib 11 can be limited, and the longitudinal force of the chute and the slider can be used to generate friction. , which defines the position of the slider in the chute.

In another optional embodiment, one end of the lower baffle 12 is fixed to the outside of the corresponding positioning station by bolts, the other end of the lower baffle 12 is hinged with a lower connecting plate, and the other end of the lower connecting plate is correspondingly connected to the The support plate 3 corresponds to the lower edge of the inner side of the positioning station, so as to realize the fixing of the lower baffle 12; one end of the upper baffle 7 is hinged to one end of the bracket 4 through a hinge shaft, and the other end of the upper baffle 7 is hinged with an upper connecting plate , the other end of the upper connecting plate is correspondingly connected to the other end of the bracket 4, so as to realize the fixing of the upper baffle 7, and after the grid arch is welded, the upper baffle 7 and the lower baffle 12 are removed to This is to unload the grid arch.

In another optional embodiment, a U-shaped groove corresponding to the positioning seat 5 is provided above the base 1, and the positioning seat 5 is slidably fitted in the U-shaped groove. It is necessary to adjust the position of the positioning seat 5. Specifically, the base 1 can be an I-shaped steel with one side opening facing upwards, and rollers are provided under the base 1 to facilitate movement. The positioning plate 2 is slidably fitted in the U-shaped groove above the base 1 through the sliding seat, so that the main ribs 11 are aligned longitudinally through the positioning plate 2. There are studs on the outside of the base 1, which can pass through the outer wall of the U-shaped groove and then extend into the , so that the positioning seat 5 or the sliding seat of the positioning plate 2 is fixed.

In another optional embodiment, the positioning mold also includes a plurality of unloading mechanisms, which are interlaced with a plurality of positioning seats 5, so that the grid arch can be lifted and unloaded evenly, ensuring Unloading stability. In this embodiment, multiple positioning molds operate synchronously, and they can be independent of each other or correspondingly connected to the same truss for fixing. When connecting the same truss, the diameter of the corresponding arc on the inner side of the truss matches the outer arc of the base 1 .

In another optional embodiment, the unloading mechanism includes a discharge seat 6 and a support member 15. A lifting rod 19 is connected to the top of the discharge seat 6 through a lifting member, and rollers are provided below. The lifting rod 19 can be a hydraulic cylinder. The lower end is fixedly connected to the unloading work, and the upper end is fixedly connected to the support member 15. The support member 15 extends radially and horizontally along the base 1. After reaching under the grille arch, the elevating rod 19 lifts the grille arch from bottom to top, so that the up and down The distribution of square main ribs 11 breaks away from the lower gap and the upper gap, thereby facilitating unloading.

In an optional embodiment, the support member 15 is a channel steel, and the length of the support member 15 protruding inwardly from the discharge seat 6 is at least greater than the sum of the width of the support plate 3 and the width of the grid arch. The channel steel corresponds to one end of the outer side. There is a screw rod 16 inside the channel steel. The screw rod 16 is rotatably connected to the inside of the channel steel. The dial 17 is slidably assembled inside the channel steel through the dial 17. The dial 17 is compatible with the channel steel. , to slide in the channel steel driven by the screw rod 16, the corresponding outer end of the screw rod 16 protrudes from the channel steel, and is connected with a stepping motor 18 correspondingly, so that the dial 17 is driven by the stepping motor 18, and the dial 17 extends upwards Out of the channel steel, the welded grid arch can be pushed out of the positioning station, so that it can be hoisted and unloaded by driving. In this implementation, the upper end of the shifting plate 17 is provided with an inwardly bent bending portion, which in turn can ensure the resistance to the grille arch. This application provides a new mold for the grille arch welding machine. After the four main ribs 11 of the frame are fixed, the welding of accessories such as the 8-shaped ribs 10 is carried out in sequence, and welding is carried out for various steel bar arches of different sizes with the same radian. The welding efficiency is high and the manufacturing accuracy is improved.

Claims

A positioning mold suitable for grid arch processing, characterized in that the positioning mold includes a base, a positioning seat and a positioning plate, the base is an arc-shaped seat body, and the base is fixed under the positioning seat, A longitudinally extending support plate is provided above, and a plurality of positioning seats are equidistantly distributed along the length direction of the base. The inner side of the support plate is provided with a positioning station corresponding to the grid arch, which is used to place the grid. Grid arch frame, two lower gaps for carrying the main ribs below the grid arch frame are provided under the positioning station, and a bracket extending toward the positioning station is provided above the positioning station. The bracket is provided with an upper gap for carrying the main reinforcement above the grid arch;

The two positioning plates are correspondingly arranged at both ends of the base, and are slidably assembled on the base along its length direction so as to abut against the two ends of the grid arch.
According to the positioning mold suitable for grid arch processing according to claim 1, it is characterized in that there are two lower gaps, and the two lower gaps respectively correspond to the two main ribs below the bearing grid arch, so The gap below has a certain width to adapt to the main reinforcement spacing corresponding to different grid arches;

There are two upper gaps, and the two upper gaps respectively correspond to the two main ribs above the load-bearing grid arch. The upper gap has a certain width to adapt to the spacing of the main ribs corresponding to different grid arches.
The positioning mold suitable for grid arch processing according to claim 2, wherein the positioning station is provided with a detachable lower baffle, and the lower baffle guides the main ribs under the grid arch limited within the lower gap;

A hinged upper baffle is provided on the support, and the upper baffle rotates toward the support to limit the main ribs above the grid arch to the upper gap.
The positioning mold suitable for grille arch processing according to claim 3 is characterized in that, the side of the lower baffle is provided with a sliding groove extending radially along the corresponding arc of the base, and the sliding assembly inside the sliding groove is There are two lower sliders, and lower studs are arranged on the two lower sliders, and the lower studs press down to tighten the main ribs below;

The side of the upper baffle is provided with an upper chute extending radially along the corresponding arc of the base, and two upper sliders are slidably installed in the upper chute, and upper screws are provided on the two upper sliders. column, and the upper stud tightens the upper main reinforcement downwards.
The positioning mold suitable for grid arch processing according to claim 4, characterized in that, the lower end of the lower stud is rotatably connected with a lower limiter, and the lower limiter is correspondingly clamped to the main rib below;

The lower end of the upper stud is rotatably connected with an upper limiter, and the upper limiter is correspondingly clamped to the upper main rib.
The positioning mold suitable for grid arch processing according to claim 3, wherein one end of the lower baffle plate is fixed to the outside of the support plate corresponding to the positioning station by bolts, and the other end of the lower baffle plate is One end is hinged with a lower connecting plate, and the other end of the lower connecting plate is correspondingly connected to the lower edge of the inner side of the corresponding positioning station of the supporting plate;

One end of the upper baffle is hinged to one end of the bracket through a hinge, the other end of the upper baffle is hinged to an upper connecting plate, and the other end of the upper connecting plate is correspondingly connected to the other end of the bracket .
The positioning mold suitable for grid arch processing according to claim 1, wherein a U-shaped groove corresponding to the positioning seat is arranged above the base, and the positioning seat is slidably fitted in the U-shaped groove Inside.
The positioning mold suitable for grid arch processing according to claim 1, wherein rollers are arranged under the base.
The positioning mold suitable for grid arch processing according to claim 1, wherein the positioning mold further includes a plurality of unloading mechanisms, and a plurality of unloading mechanisms and a plurality of positioning seats are alternately distributed .
The positioning mold suitable for grid arch processing according to claim 9, wherein the unloading mechanism includes a unloading seat and a support member, and a lifting rod is connected above the unloading seat through a lifting piece, so that The lifting rod lifts the grid arch from bottom to top, so that the upper and lower main ribs are distributed away from the lower gap and the upper gap.