Mold structure for forming movable block of dynamic balance groove of rail transit fan

Abstract

The utility model discloses a rail transit fan dynamic balance groove loose piece forming die structure which comprises a die base and an annular loose piece bottom die, the annular loose piece bottom die is detachably installed on the upper portion of the die base, and four guide sliding keys are fixedly installed on the die base in an annular array mode with the annular loose piece bottom die as the axis. Sliding plates are installed on the sliding guide keys in a sliding mode, one end of each sliding plate is pushed by a hydraulic cylinder to lock the annular loose piece bottom die, water cooling bags are arranged on the two sides of each sliding plate, and the water cooling bags are fixedly installed on the die base. The sliding plate is pushed to move through the hydraulic cylinder, so that the sliding plate transversely abuts against the arc-shaped movable block, shaking of the arc-shaped movable block can be effectively avoided, groove position deviation is avoided, and product quality is improved; the two water pipes of the water cooling bag are externally connected with the water supply pipe and the water outlet pipe correspondingly, circulating water cooling is achieved, the temperature of the arc-shaped movable block is reduced, the product quality at the dynamic balance groove position is improved, meanwhile, the arc-shaped movable block is cooled and contracted, demolding is facilitated, and demolding damage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of mold equipment technology, and more specifically, to a mold structure for forming the dynamic balancing groove of a rail transit fan. Background Technology

[0002] In the dynamic balancing adjustment of rail transit fans, the combined use of movable blocks and dynamic balancing grooves is a key technology. It eliminates imbalance by precisely adjusting the mass distribution, ensuring smooth fan operation and reducing vibration and noise.

[0003] The current balancing groove block forming mold has the following technical problems:

[0004] 1. High secondary processing costs: Traditional dynamic balancing grooves are not pre-cast and need to be milled after casting, resulting in high product processing costs.

[0005] 2. Loose block positioning offset: During casting, the loose block is displaced by the impact of molten aluminum, resulting in a groove position deviation >0.5mm (affecting dynamic balance accuracy), which affects customer use and leads to a high product scrap rate.

[0006] 3. Demolding damage: If the live block sticks to the cavity, forcibly ejecting it can easily scratch the cavity wall.

[0007] Therefore, there is an urgent need for a new type of mold structure for modular forming to solve the current casting problems. Utility Model Content

[0008] The purpose of this invention is to provide a mold structure for forming a dynamic balancing groove for a fan.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A mold structure for forming a dynamic balancing groove movable block of a rail transit fan includes a mold base and an annular movable block bottom mold, as well as four guide keys and sliding plates. The annular movable block bottom mold is detachably installed on the upper part of the mold base. The four guide keys are fixedly installed on the mold base in a ring array with the annular movable block bottom mold as the axis. Sliding plates are slidably installed on each guide key. One end of the sliding plate is pushed by a hydraulic cylinder to lock the annular movable block bottom mold. Water cooling bags are provided on both sides of the sliding plate, and the water cooling bags are fixedly installed on the mold base.

[0010] Preferably, the annular movable block bottom mold is composed of four arc-shaped movable blocks, and positioning pins are fixedly installed at both ends of the bottom of the arc-shaped movable blocks. The upper surface of the mold base is provided with positioning holes for the positioning pins to be inserted.

[0011] Preferably, the guide key has a trapezoidal cross-section with its short side facing downwards, and the bottom of the sliding plate has a dovetail groove along its length, through which the sliding plate is slidably connected to the guide key.

[0012] Preferably, the water-cooling package has a water cavity inside, and two water pipes are connected to the water cavity outward.

[0013] Preferably, the positioning pin is made of H13 steel, and a 0.1mm gap is reserved between the positioning hole of the mold base and the positioning pin.

[0014] Preferably, the surface of the arc-shaped movable block is provided with a nanocomposite coating.

[0015] Preferably, the water cavity is located inside the water-cooling package near the sliding plate.

[0016] Preferably, the sliding plate has a positioning protrusion fixed at one end near the arc-shaped movable block, and the outer surface of the arc-shaped movable block has a groove for the positioning protrusion to be inserted.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] This invention uses a hydraulic cylinder to move a sliding plate, which laterally abuts the arc-shaped movable block, effectively preventing the arc-shaped movable block from shaking, avoiding groove deviation, and improving product quality. Through two water pipes connected to the water cooling package, a water supply pipe and a water outlet pipe are respectively connected to achieve circulating water cooling, reducing the temperature of the arc-shaped movable block, improving the product quality in the dynamic balance groove position, and at the same time, the arc-shaped movable block shrinks due to cooling, which is conducive to demolding and avoids demolding damage. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of a mold structure for forming a dynamic balancing groove movable block for a rail transit fan according to this utility model;

[0021] Figure 2 This is a cross-sectional view of a mold structure for forming a dynamic balancing groove movable block for a rail transit fan according to this utility model.

[0022] Figure 3 This is a structural diagram of the arc-shaped movable block of this utility model;

[0023] Figure 4 This is a cross-sectional view of the sliding plate of this utility model.

[0024] In the diagram: 1. Annular movable block bottom mold; 11. Arc-shaped movable block; 12. Positioning pin; 2. Water cooling bag; 21. Water cavity; 3. Guide key; 4. Sliding plate; 41. Dovetail groove; 42. Positioning protrusion; 5. Water pipe; 6. Mold base. Detailed Implementation

[0025] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0026] See Figures 1-4 As shown, this utility model provides a mold structure for forming a dynamic balancing groove movable block of a rail transit fan, including a mold base 6 and an annular movable block bottom mold 1, as well as four guide keys 3 and sliding plates 4. The annular movable block bottom mold 1 is detachably installed on the upper part of the mold base 6. The four guide keys 3 are fixedly installed on the mold base 6 in a ring array with the annular movable block bottom mold 1 as the axis. Sliding plates 4 are slidably installed on each guide key 3. One end of the sliding plate 4 is pushed by a hydraulic cylinder to lock the annular movable block bottom mold 1. Water cooling bags 2 are provided on both sides of the sliding plate 4, and the water cooling bags 2 are fixedly installed on the mold base 6.

[0027] In this embodiment, the annular movable block bottom mold 1 is composed of four arc-shaped movable blocks 11. Positioning pins 12 are fixedly installed at both ends of the bottom of the arc-shaped movable blocks 11. Positioning holes for the positioning pins 12 to be inserted are opened on the upper surface of the mold base 6 to ensure the accurate installation position of the arc-shaped movable blocks 11.

[0028] In this embodiment, the cross-section of the guide key 3 is trapezoidal with its short side facing down, and the bottom of the sliding plate 4 is provided with a dovetail groove along the length direction. The sliding plate 4 is slidably connected to the guide key 3 through the dovetail groove 41.

[0029] In this embodiment, the water-cooling package 2 is provided with a water cavity 21, and two water pipes 5 are connected to the outside of the water cavity 21 for connecting the inlet and outlet water pipes, so that the water cavity 21 forms a circulating water.

[0030] In this embodiment, the positioning pin 12 is an H13 steel structure, and a 0.1mm gap is reserved between the positioning hole of the mold base 6 and the positioning pin 12 to prevent it from getting stuck at high temperature.

[0031] In this embodiment, the surface of the arc-shaped movable block 11 is provided with a nano-composite coating to reduce the adhesion of molten aluminum.

[0032] In this embodiment, the water cavity 21 is located inside the water-cooling package 2 near the sliding plate 4, which can provide cooling for the sliding plate 4.

[0033] To further enable the sliding plate 4 to lock the arc-shaped movable block 11, in this embodiment, a positioning protrusion 42 is fixedly provided at one end of the sliding plate 4 near the position of the arc-shaped movable block 11, and a groove is opened on the outer surface of the arc-shaped movable block 11 for the positioning protrusion 42 to be inserted.

[0034] The specific operating steps are as follows: When the mold is closed, the sliding plate 4 is moved by the hydraulic cylinder, so that the sliding plate 4 laterally abuts the arc-shaped movable block 11. Its positioning protrusion 42 can be inserted into the groove to prevent the arc-shaped movable block 11 from shaking. The two water pipes 5 of the water cooling package 2 are connected to the water supply pipe and the water outlet pipe respectively to realize circulating water cooling, reduce the temperature of the arc-shaped movable block 11, improve the product quality at the dynamic balance groove position, and at the same time, the arc-shaped movable block 11 cools down and shrinks, which is conducive to demolding.

[0035] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, the patent owner may make various modifications or alterations within the scope of the appended claims, as long as they do not exceed the protection scope described in the claims of the present invention, they shall all be within the protection scope of the present invention.

Claims

1. A mold structure for forming a movable block of a dynamic balancing groove for rail transit fans, comprising a mold base and an annular movable block bottom mold, characterized in that: It also includes four guide keys and sliding plates. The annular movable block bottom mold is detachably installed on the upper part of the mold base. The four guide keys are fixedly installed on the mold base in a ring array with the annular movable block bottom mold as the axis. Sliding plates are slidably installed on each guide key. One end of the sliding plate is pushed by a hydraulic cylinder to lock the annular movable block bottom mold. Water cooling bags are provided on both sides of the sliding plate, and the water cooling bags are fixedly installed on the mold base.

2. The mold structure for forming the dynamic balancing groove of a rail transit fan according to claim 1, characterized in that: The annular movable block bottom mold is composed of four arc-shaped movable blocks. Positioning pins are fixedly installed at both ends of the bottom of the arc-shaped movable blocks. Positioning holes for the positioning pins to be inserted are opened on the upper surface of the mold base.

3. The mold structure for forming the dynamic balancing groove of a rail transit fan according to claim 1, characterized in that: The guide key has a trapezoidal cross-section with its short side facing down. The bottom of the sliding plate has a dovetail groove along its length, and the sliding plate is slidably connected to the guide key through the dovetail groove.

4. The mold structure for forming the dynamic balancing groove of a rail transit fan according to claim 1, characterized in that: The water-cooling package has a water cavity inside, and two water pipes are connected to the outside of the water cavity.

5. The mold structure for forming the dynamic balancing groove of a rail transit fan according to claim 2, characterized in that: The positioning pin is made of H13 steel, and a 0.1mm gap is reserved between the positioning hole of the mold base and the positioning pin.

6. The mold structure for forming the dynamic balancing groove of a rail transit fan according to claim 2, characterized in that: The surface of the arc-shaped movable block is coated with a nanocomposite coating.

7. The mold structure for forming the dynamic balancing groove of a rail transit fan according to claim 4, characterized in that: The water chamber is located inside the water-cooling package near the sliding plate.

8. The mold structure for forming the dynamic balancing groove of a rail transit fan according to claim 2, characterized in that: The sliding plate is fixedly provided with a positioning protrusion at one end near the arc-shaped movable block, and the outer surface of the arc-shaped movable block has a groove for the positioning protrusion to be inserted.

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