A heat distortion resistant movable flat top section of a card

Abstract

The application discloses a heat-deformation-resistant aluminum alloy movable cover plate component, which comprises an aluminum alloy cover plate framework, a steel needle cloth edge clamp and a steel needle cloth. At least one deformation groove capable of offsetting length square deformation variation caused by thermal expansion and cold shrinkage is arranged at the lower end of the aluminum alloy cover plate framework, and the sum of the widths of all the deformation grooves is greater than the maximum thermal deformation of the aluminum alloy cover plate framework. As an optimization scheme, an elastic filler is arranged in the deformation groove, so that the problem of the bow-shaped deformation of the steel needle cloth caused by the aluminum alloy cover plate framework being deformed in length due to the change of the working environment temperature can be effectively solved, and the compression strength of the aluminum alloy cover plate framework in the vertical direction can be ensured. The application can eliminate the bow-shaped arc deformation of the steel needle cloth caused by the different thermal expansion coefficients of the aluminum alloy and the steel, that is, the defects of the cotton carding machine caused by the deformation and the unstable cotton carding quality are eliminated.

Description

Technical Field

[0001] This invention relates to carding machines, belonging to the field of textile machinery, and particularly to a movable cover plate for a carding machine. Background Technology

[0002] The role of a carding machine in the cotton spinning process is to open, mix, comb, and remove impurities from cotton lap raw materials, and finally bundle them into cotton slivers, which are then stored in cans for use in subsequent processes.

[0003] The aluminum alloy movable cover plate is a key component of the carding machine for achieving carding and impurity removal. During operation, the movable cover plate is subjected to continuous friction and other factors, causing its temperature to rise continuously. Existing aluminum alloy movable cover plate structures consist of an aluminum alloy cover plate frame, a needle cloth edge clamp, and a steel needle cloth belt. The steel needle cloth belt is fixed to the lower end face of the aluminum alloy cover plate frame by the needle cloth edge clamp. This type of movable cover plate generally suffers from unstable carding quality during the carding process. The actual operating conditions of the carding machine cannot meet the technical requirements for use under constant temperature conditions. Even when used under constant temperature conditions, the problem still exists, although the stability is improved, it cannot be completely eliminated. Under continuous operation, the carding quality still fluctuates.

[0004] As is well known, during the operation of a carding machine, the steel needle cloth, the needle cloth edge clamps, and the aluminum alloy cover plate frame all heat up simultaneously. Since the coefficient of thermal expansion of aluminum alloy differs from that of steel by more than double, the machine temperature gradually increases during prolonged operation. The deformation of the aluminum alloy cover plate frame is more than twice that of the steel needle cloth and needle cloth edge clamp assembly. This inevitably causes the upper end of the entire movable aluminum alloy cover plate to lengthen while the lower end shortens. This deformation results in the steel needle cloth exhibiting an arc-shaped deformation, lower at both ends and higher in the middle. This deformation is the main reason for the unstable carding quality of the carding machine. To improve the carding quality of the carding machine, the impact of this thermal deformation on the steel needle cloth must be completely eliminated.

[0005] The applicant disclosed an aluminum alloy movable cover plate with heat deformation resistance function in ZL202122297899.6. This aluminum alloy movable cover plate with heat deformation resistance function includes an aluminum alloy cover plate frame, a steel needle cloth side clamp and a steel needle cloth. The steel needle cloth is fixed to the lower end face of the aluminum alloy cover plate frame by the steel needle cloth side clamp, and a steel isothermal balancing component is fixed inside the aluminum alloy cover plate frame.

[0006] By adding a steel isothermal balancing component inside the aluminum alloy cover plate frame, and ensuring that the steel isothermal balancing component is fixedly connected to the aluminum alloy cover plate frame in contact, it is possible to ensure that the steel isothermal balancing component and the aluminum alloy cover plate frame heat up and deform synchronously. This eliminates the arched deformation of the steel carding cloth caused by the different thermal expansion coefficients of aluminum alloy and steel, which is low at both ends and high in the middle. Although this solution can reduce the amount of deformation of the carding machine caused by changes in machine temperature and ambient temperature, in actual production, the contact stability between the steel isothermal balancing component and the aluminum alloy cover plate frame is relatively poor. Therefore, this solution cannot ideally overcome the impact of deformation of the aluminum alloy cover plate frame of the carding machine caused by changes in machine temperature and ambient temperature on the quality of the carding machine.

[0007] Therefore, a more effective solution must be sought. Summary of the Invention

[0008] The purpose of this invention is to provide a heat-resistant aluminum alloy movable cover plate component.

[0009] The technical solution adopted in this invention is as follows:

[0010] A movable cover plate component for a carding machine that resists heat deformation includes an aluminum alloy cover plate frame, a needle cloth edge clamp, and a steel needle cloth belt. The steel needle cloth belt is fixed to the lower end face of the aluminum alloy cover plate frame by the needle cloth edge clamp. At least one deformation groove is provided along the upper length direction of the aluminum alloy cover plate frame. The deformation groove can offset the difference in deformation in the length direction caused by thermal expansion and contraction of the aluminum alloy cover plate frame, the needle cloth edge clamp, and the steel needle cloth belt.

[0011] Furthermore, an elastic filler is provided in the deformation groove.

[0012] Furthermore, the sum of the widths of all deformation grooves is greater than or equal to the maximum thermal deformation of the aluminum alloy cover plate skeleton.

[0013] Furthermore, the deformation groove is set at the bottom end of the aluminum alloy cover plate frame and is spaced apart along the length direction of the aluminum alloy cover plate frame. The height of the deformation groove is greater than the height of the bottom tube of the aluminum alloy cover plate frame.

[0014] Furthermore, the angle between the deformation groove and the horizontal plane is 30 degrees to 150 degrees.

[0015] Furthermore, the deformation groove is a vertical groove.

[0016] Furthermore, the top of the vertical groove is an arc-shaped surface.

[0017] Furthermore, the deformation grooves are fully opened along the bottom width direction of the aluminum alloy cover plate skeleton, or are distributed with intersecting gaps along the bottom width direction of the aluminum alloy cover plate skeleton.

[0018] Furthermore, the deformation groove includes a vertical groove and an engagement groove, and at least one side of the vertical groove is provided with an engagement groove.

[0019] Furthermore, the upper end of the vertical groove is an arc surface, and the cross-sectional shape of the interlocking groove is rectangular, dovetail-shaped, arc-shaped, or T-shaped.

[0020] Furthermore, the needle cloth edge clamp and the aluminum alloy cover plate frame are detachably fixed. This ensures that the steel needle cloth edge clamp and steel needle cloth strip assembly are integrated with the aluminum alloy cover plate frame. When the working temperature of the movable cover plate components rises synchronously, the aluminum alloy cover plate frame is rigidly restricted by the needle cloth edge clamp and steel needle cloth strip assembly, causing the deformation of the aluminum alloy cover plate frame along its length to develop in the direction of the deformation groove. This ensures that the aluminum alloy cover plate frame and the combination of needle cloth edge clamp and steel needle cloth strip achieve equal expansion and contraction in the length direction.

[0021] Because the aluminum alloy cover plate frame has at least one deformation groove, and the sum of the widths of all the deformation grooves is greater than the maximum thermal deformation of the aluminum alloy cover plate frame, when the overall temperature of the aluminum alloy cover plate component rises, the bottom is enclosed and wrapped by the needle cloth edge clamps. The outward extension of the lower end of the aluminum alloy cover plate frame is hindered, and it can only deform inward towards the deformation groove. This can offset the change in length deformation caused by thermal expansion and contraction. If an elastic filler is provided in the deformation groove, this can effectively solve the problem of the aluminum alloy cover plate frame deforming in length due to changes in the working environment temperature, causing the steel needle cloth to tug and produce an arc-shaped deformation, and can also ensure the compressive strength perpendicular to the length direction of the aluminum alloy cover plate frame.

[0022] This invention can completely eliminate the arc-shaped deformation of the steel needle cloth belt caused by the different coefficients of thermal expansion of aluminum alloy and steel, which is low at both ends and high in the middle. This completely eliminates the defect of unstable carding quality caused by deformation in carding machines.

[0023] The applicant conducted confirmatory testing on this invention, and the specific tests and results are as follows:

[0024] The single aluminum alloy movable cover plate component of an existing carding machine was tested under the following conditions:

[0025] The test piece of this invention is an aluminum alloy movable cover plate component of a carding machine with a width of 1380 mm and an aluminum alloy cover plate skeleton in the component, with a deformation groove width of 3 mm;

[0026] Component No. 1, with an existing aluminum alloy cover plate frame, 1380 mm in length;

[0027] Part No. 2 is a combination of Part No. 1, needle cloth edge clamp, and steel needle cloth tape;

[0028] For part number 3, a deformation groove is made in the center of the aluminum alloy cover plate frame number 1.

[0029] Part No. 4, a combination of Part No. 3 and the needle cloth edge clamp and steel needle cloth tape;

[0030] Part No. 5 has two deformation grooves spaced apart on the existing aluminum alloy cover plate frame;

[0031] Part No. 6, a combination of Part No. 5, needle cloth edge clamp, and steel needle cloth tape;

[0032] Part No. 7 has three deformation grooves spaced apart on the existing aluminum alloy cover plate frame;

[0033] Part No. 8, a combination of Part No. 7 and the needle cloth edge clamp and steel needle cloth tape;

[0034] The aluminum alloy cover plate frame was divided into 8 equally spaced sections along its length, with 7 points (unit: 0.01 mm) for testing. The ambient temperature for testing was:

[0035] The reference parts (parts 1, 3, 5, and 7) are used to simulate the flatness test of corresponding points under the working temperature conditions (25 degrees Celsius) of the assembly environment;

[0036] The assemblies (parts 2, 4, 6, and 8) are used to simulate the flatness testing of corresponding points under working ambient temperature conditions (35 degrees Celsius).

[0037] The following table shows the straightness test results for parts 1-8:

[0038] As shown in the table above, this comparative test was divided into four groups: the first group consisted of parts 1 and 2; the second group consisted of parts 3 and 4; the third group consisted of parts 5 and 6; and the fourth group consisted of parts 7 and 8. The first group represents the current state of the technology. Part 1 met the part design requirements, but the static deformation of part 2 under simulated carding machine operating temperature conditions showed a maximum deformation of 0.155 mm, indicating the situation described in the background section.

[0039] The combination of the aluminum alloy cover plate frame, the needle cloth edge clamp, and the steel needle cloth belt is made of different materials, which causes the steel needle cloth belt to exhibit an arc-shaped deformation with low ends and high middle.

[0040] The second, third, and fourth comparison groups all had deformation grooves on their aluminum alloy cover plate frames. The overall deformation was repaired through these grooves and controlled within 0.03 mm, which meets the design range of the carding machine's aluminum alloy movable cover plate components. The test results show that as long as deformation grooves are provided at the bottom of the aluminum alloy cover plate frame, the amount of thermal deformation of the carding machine's aluminum alloy movable cover plate can be reduced. Furthermore, the effect of eliminating deformation is better when there are 2 to 3 deformation grooves along the length direction. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the end face structure of the aluminum alloy movable cover plate of an existing carding machine.

[0042] Figure 2 for Figure 1 A schematic diagram of its decomposed structure.

[0043] Figure 3 This is a schematic diagram showing the thermal deformation of the aluminum alloy movable cover plate of an existing carding machine.

[0044] Figure 4 This is a schematic diagram of the end face structure of the aluminum alloy cover plate frame.

[0045] Figure 5 for Figure 4 A schematic diagram of the AA cross-sectional structure.

[0046] Figure 6 for Figure 5 A schematic diagram of a structure in the B direction, where the deformation groove is fully opened along the width direction.

[0047] Figure 7 This is a schematic diagram of a deformation groove.

[0048] Figure 8 This is a schematic diagram of another structure of the deformation groove.

[0049] Figure 9 This is a schematic diagram of a structure with an interlocking groove (dovetail groove) on the side of the deformation groove.

[0050] Figure 10 This is a schematic diagram of a structure with an interlocking groove (T-groove) on the side of the deformation groove.

[0051] Figure 11 This is a schematic diagram of a structure in which elastic filler is injected into the deformation groove.

[0052] Figure 12 for Figure 5 Another structural diagram of the B-direction is shown, in which the deformation groove is set with a notch staggered along the width direction.

[0053] In the diagram: 1-Aluminum alloy cover plate frame; 2-Needle cloth edge clamp; 3-Steel needle cloth tape; 4-Deformation groove; 5-Elastic filler; 6-Sliding heel-toe block; 11-Bottom tube; 12-Heat dissipation tube; 41-Vertical groove; 42-Interlocking groove; 43-Left deformation groove; 44-Right deformation groove; 45-Arc surface. Detailed Implementation

[0054] The present invention will be further described below with reference to the accompanying drawings and specific examples.

[0055] Example 1: A heat-deformation-resistant aluminum alloy movable cover plate component, such as... Figures 4-8 As shown, the device includes an aluminum alloy cover plate frame 1, needle cloth edge clamps 2, steel needle cloth strips 3, and sliding heel blocks 6. The aluminum alloy cover plate frame 1 includes a bottom tube 11 and a heat dissipation tube 12. The steel needle cloth strip 3 is fixedly installed on the lower end face of the bottom tube 11 of the aluminum alloy cover plate frame 1 through two symmetrical needle cloth edge clamps 2. The sliding heel blocks 6 are fixedly installed at both ends of the bottom tube 11. A left deformation groove 43 and a right deformation groove 44 are provided at intervals along the length direction at the lower end of the aluminum alloy cover plate frame 1. The left deformation groove 43 and the right deformation groove 44 are fully opened along the width direction, so that the bottom of the aluminum alloy cover plate frame 1 is divided into three sections. The left deformation groove 43 and the right deformation groove 44 are both straight grooves with a groove width of 3 mm. The top of the straight grooves are both arc surfaces 45 with a diameter of 5 mm. The sum of the groove widths of the deformation grooves 4 on each aluminum alloy cover plate frame 1 is 6 mm, which is greater than the maximum thermal deformation of the aluminum alloy cover plate frame 1.

[0056] This ensures that the combination of the needle cloth edge clamp 2 and the steel needle cloth 3 is integrated with the aluminum alloy cover plate frame 1. When the working temperature of the movable cover plate component rises, the aluminum alloy cover plate frame 1 is rigidly restricted by the combination of the needle cloth edge clamp 2 and the steel needle cloth 3, causing the deformation of the aluminum alloy cover plate frame 1 along the length direction to develop in the direction of the deformation groove 4. This ensures that the combination of the aluminum alloy cover plate frame 1, the needle cloth edge clamp 2, and the steel needle cloth 3 can achieve synchronous extension and contraction in the length direction, thereby reducing or eliminating the asynchronous deformation of the movable aluminum alloy cover plate of the carding machine caused by temperature changes during operation, and ensuring the carding uniformity and stability of the carding machine.

[0057] Example 2: Based on Example 1, an elastic filler 5 is provided in the deformation groove 4, such as... Figure 11 As shown, the elastic filler 5 is a cured silicone. In this way, when the working environment temperature changes, the length deformation of the aluminum alloy cover plate frame 1 caused by the temperature change can compress the elastic filler 5 to deform, thereby offsetting the deformation. At the same time, the aluminum alloy cover plate frame 1 will not suffer a significant reduction in compressive strength along the carding direction due to the groove.

[0058] Example 3: In Example 1, the deformation groove 4 consists of a vertical groove 41 and an engagement groove 42. Engagement grooves 42 are provided on both sides of the vertical groove 41. The upper end of the vertical groove 41 is an arc surface 45, and the diameter of the arc surface 45 is greater than or equal to the width of the deformation groove 4. Figures 9-10As shown, silicone is injected into the vertical groove 41 and the interlocking groove 42. After curing, the protruding part is removed. This allows the silicone injected into the vertical groove 41 and the interlocking groove 42 to better interlock with the aluminum alloy cover plate frame 1 after curing. This can effectively solve the problem of the aluminum alloy cover plate frame 1 deforming in length due to changes in working environment temperature, which causes the steel needle cloth to be deformed in an arc shape. It can also ensure the compressive strength of the aluminum alloy cover plate frame 1 in the vertical direction.

[0059] Example 4: In Example 3, the cross-sectional shape of the interlocking groove 42 is a dovetail shape or a T-shape.

[0060] Example 5: In Example 1, the deformation groove 4 is provided with staggered notches along the width direction of the aluminum alloy cover plate frame 1, such as... Figure 12 As shown. Although this changes the way the deformation of the aluminum alloy cover plate frame 1 in length caused by temperature changes is eliminated, it can also effectively solve the problem of deformation of the aluminum alloy movable cover plate component. At the same time, the compressive strength of the aluminum alloy cover plate frame 1 in the vertical direction is almost unaffected.

[0061] Example 7: The deformation groove 4 is an inclined groove, and the angle between the inclined groove and the horizontal plane is 30 degrees to 90 degrees or 90 degrees to 150 degrees.

[0062] There are many embodiments of the present invention, which will not be listed one by one here. All technical solutions that use a deformation groove 4 set along the length direction at the lower end of the aluminum alloy cover plate frame 1 are within the protection scope of the present invention.

Claims

1. A heat-resistant movable flat section of a carding machine, comprising an aluminum alloy flat skeleton (1), a card clothing side holder (2) and a steel card clothing strip (3), the steel card clothing strip (3) being fixed on the lower end surface of the aluminum alloy flat skeleton (1) through the card clothing side holder (2), characterized in that: At least one deformation groove (4) is arranged on the bottom end of the aluminum alloy cover plate skeleton (1) along the length direction, the deformation groove (4) can offset the length direction deformation difference of the aluminum alloy cover plate skeleton (1) and the combination of the card clothing edge clamp (2) and the steel card clothing belt (3) caused by thermal expansion and cold shrinkage, the height dimension of the deformation groove (4) is greater than the height of the bottom pipe body (11) of the aluminum alloy cover plate skeleton (1), the sum of the slot widths of all the deformation grooves (4) is greater than or equal to the maximum thermal deformation of the aluminum alloy cover plate skeleton (1), the deformation groove (4) comprises a vertical groove (41) and a bite groove (42), at least one side of the vertical groove (41) is provided with the bite groove (42), and an elastic filler (5) is arranged in the deformation groove (4).

2. The heat deflection resistant, movable flat top cover member of a carding machine according to claim 1, characterized in that: The top of the vertical groove (41) is an arc surface.

3. The heat deflection resistant, movable flat top cover member of a carding machine of claim 1 wherein: The upper end of the vertical groove (41) is a circular arc surface (45), and the cross-sectional shape of the bite groove (42) is rectangular, dovetail-shaped, circular arc-shaped or T-shaped.

4. The heat deflection resistant, movable flat top cover member of a carding machine of claim 1 wherein: The deformation groove (4) is arranged along the full width of the bottom of the aluminum alloy cover plate skeleton (1).

5. The heat deflection resistant, movable flat top cover member of claim 1 wherein: The deformation groove (4) is distributed in a staggered gap along the width direction of the bottom of the aluminum alloy cover plate skeleton (1).

6. The heat deflection resistant, movable flat top cover member of a carding machine of claim 1 wherein: The included angle between the deformation groove (4) and the horizontal plane is 30-150 degrees.

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