A leveling device and method for spring grinding.

Abstract

This invention discloses a leveling device and method for spring grinding, used to ensure consistent diameter and spacing of all rings in a spring during a test with pre-existing damage defects. The leveling device includes a V-shaped base assembly, two end-fixing block assemblies, and two L-shaped pressure plate assemblies. The two end-fixing block assemblies fix both ends of the spring, while the V-shaped base assembly and the two L-shaped pressure plate assemblies clamp and position the spring from four directions, thus securing it. Then, leveling bolts at the bottom of the V-shaped base assembly control all rings to be on the same horizontal plane, ensuring consistent pre-existing wear depth for each ring, meeting the expected dimensional requirements, and improving processing efficiency.

Description

Technical Field

[0001] This invention patent belongs to the field of spring grinding, and specifically relates to a leveling device and method for spring grinding. Background Technology

[0002] To enhance the sustained combat capability of the armed forces, research on the remaining service life of aviation equipment has become particularly important. The bomb bay door spring is a crucial component providing auxiliary pulling force for the bomb bay door operating system; each end of the spring wire has a threaded section (e.g., Figure 7 As shown in the figure, this spring plays an important role in the opening and closing of the bomb bay door.

[0003] During actual maintenance inspections, damage defects ranging from 0.1mm to 0.4mm deep were found on the outer surface of the spring wire along the axial direction. Analysis suggests this was caused by friction between the spring and other components during service. However, there is currently no research on the impact of the depth of the damage defect on the outer surface of the spring wire on its remaining service life. Therefore, in current maintenance practices, springs with this type of wear are immediately scrapped, leading to excessive resource waste. Furthermore, due to the specific nature of their use, these springs are currently custom-made, causing production cycles that cannot meet the combat training needs of the troops. Therefore, it is necessary to study the relationship between the depth of the damage defect on the outer surface of the spring wire and its remaining service life to clarify maintenance and support methods.

[0004] To study the relationship between the depth of damage defects on the outer surface of the spring wire and its remaining life, it is necessary to artificially pre-determine damage defects, such as... Figure 6 As shown, artificially pre-designed damage defects can be produced by grinding on a surface grinder. By machining defects of different depths through the downward movement of the machine tool spindle, the relationship between damage depth and the remaining life of the spring can be studied. However, due to the relatively soft structure of the spring, it is difficult to ensure the consistency and reliability of the machining dimensions using ordinary fixtures. In addition, it is impossible to guarantee that the diameter and spacing of each ring are 100% consistent during the manufacturing process. If a surface fixture is used to fix the spring before grinding, the pre-designed wear depth of each ring will be inconsistent, resulting in a lack of uniformity in the test samples and affecting the research results.

[0005] In view of the above problems, it is very necessary to design a leveling device and method for spring grinding. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that, due to the relatively soft structural characteristics of springs, existing spring clamps are difficult to ensure that the diameter and spacing of each ring of the spring are consistent; therefore, the present invention provides a spring grinding and leveling device and method.

[0007] The technical solution of this invention is:

[0008] A leveling device for spring grinding is characterized in that it includes a V-shaped base assembly (100), two end fixing block assemblies (200), and two L-shaped pressure plate assemblies (300);

[0009] The V-shaped base assembly (100) includes a V-shaped base (101) and a leveling bolt (102);

[0010] The V-shaped base (101) is a cuboid;

[0011] The top of the V-shaped base (101) is a V-shaped surface, and both sides of the V-shaped surface are in contact with the cut surface of the spring wire at the same time;

[0012] The bottom of the V-shaped surface is provided with a vertical threaded through hole with the same number of spring coils, and the position of the threaded through hole is consistent with the position of the contact point of the spring wire at the bottom of the V-shaped base.

[0013] The V-shaped base (101) has several vertical through holes (103) on the top end faces of both sides of the V-shaped surface;

[0014] The V-shaped base (101) has several horizontal through holes (104) on its two sides;

[0015] The V-shaped base (101) has two blind holes (105) on each of its front and rear end faces;

[0016] The leveling bolt (102) is set in the threaded through hole. The bottom end of the leveling bolt (102) is in direct contact with the lowest point of the bottom of the single coil spring wire, ensuring that the leveling bolt (102) can directly control the height of the single coil spring wire by the depth in the threaded through hole.

[0017] The two end fixing block assemblies (200) are respectively disposed on the front and rear end faces of the V-shaped base;

[0018] Each of the two end fixing block assemblies (200) includes an end fixing block (201), two tightening screws (202), and a tightening nut (203);

[0019] The end fixing block (201) is a triangular plate structure; the top of the end fixing block (201) is provided with a first through hole for the spring wire at the end of the spring to pass through, and the bottom is provided with two second through holes for fixing the end fixing block (201) to the end face of the V-shaped base (101); the two tightening screws (202) cooperate with the two blind holes (105), and the two tightening screws (202) pass through the two second through holes and are respectively set in the two blind holes (105) to fix the end fixing block (201) to the end face of the V-shaped base (101);

[0020] The tightening nut (203) engages with the end of the spring wire; when the spring is placed on the V-shaped base and at its natural length, the spring wire at the end of the spring passes through the first through hole, and the tightening nut (203) is set on the spring wire at the end of the spring to fix the spring wire to the end fixing block;

[0021] Each of the two L-shaped pressure plate assemblies (300) includes an L-shaped pressure plate (301) and several tightening screws (302); the L-shaped pressure plate (301) is composed of a top plate and a side plate, and the outer end face of the top plate is inclined and in contact with the spring wire;

[0022] The top plate and side plate are provided with several vertical through holes and horizontal through holes, which are respectively matched with the vertical through holes (103) and horizontal through holes (104) on the V-shaped base;

[0023] The two surfaces of the V-shaped surface and the inclined surfaces of the two L-shaped pressure plates together clamp and position the spring, thereby fixing the spring.

[0024] Furthermore, the side plate is arranged parallel to the side of the V-shaped base (101), and its width does not exceed the height of the V-shaped base; the top plate is arranged parallel to the top surface of the V-shaped base (101), and its width does not exceed half the width of the V-shaped base.

[0025] Preferably, for ease of assembly, the two blind holes (105) are symmetrical along the central axis of the V-shaped surface.

[0026] Preferably, the top plate and side plate of the L-shaped pressure plate (301) are evenly provided with a number of horizontal and vertical through holes of the same number and opposite positions.

[0027] Preferably, the V-shaped surface at the top of the V-shaped base has an angle of 90°.

[0028] Preferably, for ease of assembly, the end fixing block (201) is an equilateral triangular plate structure.

[0029] Preferably, the bottom of the V-shaped base has a hollow structure.

[0030] Preferably, in order to facilitate the restoration of the leveling state, the initial position of the threaded post of the leveling bolt (102) is marked; when the leveling bolt (102) is used to level each ring of the spring, the initial position of the threaded post is taken as the reference.

[0031] A spring grinding leveling method using the above-mentioned spring grinding leveling device is characterized by comprising the following steps:

[0032] Step 1: Screw the leveling bolt (102) into the threaded through hole at the bottom of the V-shaped base 101, and use the leveling bolt (102) to level each ring of the spring;

[0033] Step 2: Pass both ends of the spring wire through the top through holes of the two end fixing blocks (201) respectively, and fix them with tightening nuts (203);

[0034] Step 3: Slowly screw the tightening screws (202) on the two end fixing blocks (201) into the threaded holes of the V-shaped base (101) to fix the two end fixing blocks (201) on the V-shaped base;

[0035] Step 4: Pass the tightening screw (302) through the horizontal through hole (104) and vertical through hole (103) of the two L-shaped pressure plates (301), and screw it into the vertical through hole (103) and horizontal through hole (104) on the V-shaped base respectively, so that the inclined surfaces of the two L-shaped pressure plates (301) clamp the spring but do not completely clamp the spring (401);

[0036] Step 5: Using the height of the first ring of the spring (401) as a reference, use a dial indicator to measure the runout of each ring of the spring. Tighten or loosen the leveling bolt (102) in sequence to make the runout of each ring of the spring consistent. Then continue to tighten the screw 302 until the two L-shaped pressure plates (301) completely clamp and fix the spring (401).

[0037] Step 6: Place the spring grinding and leveling device on a vertical grinding machine to process artificially pre-set damage defects on the outer surface of the spring (401).

[0038] Furthermore, in order to facilitate the restoration of the leveling state, in step 1, the initial position of the threaded post of the leveling bolt (102) is marked; when the leveling bolt (102) is used to level each ring of the spring, the initial position of the threaded post is taken as the reference.

[0039] The beneficial effects of this invention are:

[0040] 1. The present invention has a simple structure, high reliability, and is easy to manufacture and maintain. It clamps and positions the spring from four directions, thereby fixing the spring, meeting the expected requirements of the processing dimensions, ensuring grinding quality, and improving processing efficiency.

[0041] 2. This invention adjusts the height of the single coil of the spring wire by adjusting the height of the leveling bolt, so that all the spring coils are on the same horizontal plane, thereby ensuring that the preset wear depth of each coil is consistent. The operation is simple and convenient.

[0042] 3. This invention is applicable to fixing and leveling springs of various sizes, and has strong versatility. Attached Figure Description

[0043] Figure 1 A three-dimensional assembly diagram of a leveling device for spring grinding.

[0044] Figure 2 This is a schematic diagram of the V-shaped base assembly.

[0045] Figure 3 This is a schematic diagram of the end fixing block assembly.

[0046] Figure 4 This is a schematic diagram of the V-shaped pressure plate assembly.

[0047] Figure 5 This is a schematic diagram showing the completed assembly of the leveling device for spring grinding.

[0048] Figure 6 This is a schematic diagram of the finished product after grinding.

[0049] Figure 7 This is a partial schematic diagram of the two threaded ends of a spring.

[0050] Figure label:

[0051] 100-V-type base assembly; 101-V-type base; 102-Leveling bolt; 103-Vertical through hole; 104-Horizontal through hole; 105-Blind hole;

[0052] 200 - End fixing block assembly; 201 - End fixing block; 202 - Tightening screw; 203 - Tightening nut;

[0053] 300-L-type pressure plate assembly; 301-L-type pressure plate; 302-tightening screw;

[0054] 401 - Spring; 402 - Pre-existing defect location on the spring. Detailed Implementation

[0055] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0056] like Figure 1 The spring grinding leveling device shown includes a V-shaped base assembly 100, two end fixing block assemblies 200 and two L-shaped pressure plate assemblies 300;

[0057] like Figure 2 As shown, the V-shaped base assembly 100 includes a V-shaped base 101 and a leveling bolt 102.

[0058] The V-shaped base 101 is a cuboid, the length of which matches the natural length of the spring 401. The top of the V-shaped base 101 is a V-shaped surface, and both sides of the V-shaped surface are in contact with the tangential surface of the spring wire. The V-shaped surface at the top of the V-shaped base is preferably 90°, at which point the deformation of the spring is minimized.

[0059] The bottom of the V-shaped surface is provided with vertical threaded through holes, the same number as the number of spring coils, and the position of the threaded through holes is consistent with the contact point of the spring wire at the bottom of the V-shaped base. The V-shaped base 101 has several vertical through holes 103 on the top end faces of both sides of the V-shaped surface; several horizontal through holes 104 are provided on both sides of the V-shaped base 101; two blind holes 105 are provided on each of the front and rear end faces of the V-shaped base 101, preferably, the two blind holes 105 are symmetrical along the central axis of the V-shaped surface.

[0060] The leveling bolt 102 is set in the threaded through hole at the bottom of the V-shaped surface. The bottom end of the leveling bolt 102 is in direct contact with the lowest point of the single coil spring wire of the spring 401, ensuring that the leveling bolt 102 can directly control the height of the single coil spring wire by the depth in the threaded through hole. Since the leveling bolt needs to be operated from the bottom of the V-shaped base 101, it is preferable that the bottom of the V-shaped base is a hollow structure.

[0061] The threaded post of the leveling bolt 102 is marked with a mark representing the initial position (not shown in the figure) so that the operator can check the position of the leveling bolt 102 and restore all the leveling bolts 102 to the flush position.

[0062] Each of the two end fixing block assemblies 200 includes an end fixing block 201, two tightening screws 202 and a tightening nut 203.

[0063] like Figure 3 As shown, the end fixing block 201 is a triangular plate structure, preferably an equilateral triangular plate structure with rounded edges; the top of the end fixing block 201 has a first through hole for the spring wire at the end to pass through, and the bottom has two second through holes for fixing the end fixing block 201 to the end face of the V-shaped base 101. Two tightening screws 202 cooperate with two blind holes 105, and the two tightening screws 202 pass through the two second through holes and are respectively set in the two blind holes 105, fixing the end fixing block 201 to the end face of the V-shaped base 101;

[0064] Tighten nut 203 to engage with the end of spring wire; the spring wire at the end of the spring passes through the first through hole, and tighten nut 203 is set on the spring wire at the end of the spring to fix the spring wire to the end fixing block.

[0065] like Figure 4 As shown, each of the two L-shaped pressure plate assemblies 300 includes an L-shaped pressure plate 301 and several tightening screws 302; the L-shaped pressure plate 301 is composed of a top plate and a side plate, and the outer end face of the top plate is inclined and in contact with the spring wire.

[0066] The side plates are arranged parallel to the side of the V-shaped base 101, and their width does not exceed the height of the V-shaped base 101. The top plate is arranged parallel to the top surface of the V-shaped base 101, and its width does not exceed half the width of the V-shaped base 101.

[0067] The top and side plates of the L-shaped pressure plate 301 are provided with a number of horizontal and vertical through holes, which respectively cooperate with the vertical through holes 103 and horizontal through holes 104 on the V-shaped base. Preferably, the top and side plates of the L-shaped pressure plate 301 are provided with the same number of horizontal and vertical through holes in opposite positions, which respectively cooperate with the vertical through holes 103 and horizontal through holes 104 on the V-shaped base.

[0068] Tighten screws 302 through the horizontal through holes of L-shaped pressure plates 301 and V-shaped bases, and fix the two L-shaped pressure plates 301 to the two sides of the V-shaped base from the horizontal direction.

[0069] Tighten screw 302 through the vertical through hole of L-shaped pressure plate 301 and the vertical through hole of V-shaped base to fix the two L-shaped pressure plates on the top surface of V-shaped base from the vertical direction.

[0070] The two surfaces of the V-shaped surface and the inclined surfaces of the two L-shaped pressure plates 301 together clamp and position the spring, thereby fixing the spring.

[0071] Method of grinding springs using a spring grinding and leveling device:

[0072] Step 1: Mark the initial position of the threaded post of the leveling bolt (102); screw the leveling bolt 102 into the threaded through hole at the bottom of the V-shaped base 101, and use the leveling bolt 102 to level each ring of the spring; after all the leveling bolts 102 are screwed into the marked position at the initial position, place the spring 401 horizontally on the V-shaped base assembly 100.

[0073] Step 2: Pass both ends of the spring wire through the top through holes of the two end fixing blocks 201 respectively, and fix them with tightening nuts 203;

[0074] Step 3: Slowly screw the tightening screws 202 on the two end fixing blocks 201 into the threaded holes of the V-shaped base 101 to fix the two end fixing blocks 201 on the V-shaped base.

[0075] Step 4: Pass the tightening screw 302 through the horizontal through hole 104 and the vertical through hole 103 of the two L-shaped pressure plates 301, and screw it into the vertical through hole 103 and the horizontal through hole 104 on the V-shaped base respectively. The inclined surfaces of the two L-shaped pressure plates 301 clamp the spring but do not completely clamp the spring 401.

[0076] Step 5: Using the height of the first ring of spring 401 as a reference, use a dial indicator to measure the runout of each ring of the spring. Tighten or loosen the leveling bolt 102 in sequence to make the runout of each ring of the spring consistent. Then continue to tighten the screw 302 until the two L-shaped pressure plates 301 completely clamp and fix the spring 401.

[0077] Step 6: Place the spring grinding and leveling device on a vertical grinding machine to process artificially pre-designed damage defects on the outer surface of spring 401, such as... Figure 6 As shown.

[0078] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the scope of the technology disclosed in the present invention, and such modifications or substitutions should all be covered within the scope of protection of the present invention.

Claims

1. A leveling device for spring grinding, characterized in that, It includes a V-shaped base assembly (100), two end fixing block assemblies (200) and two L-shaped pressure plate assemblies (300). The V-shaped base assembly (100) includes a V-shaped base (101) and a leveling bolt (102). The V-shaped base (101) is a cuboid; The top of the V-shaped base (101) is a V-shaped surface, and both sides of the V-shaped surface are in contact with the cut surface of the spring wire at the same time. The angle of the V-shaped surface is 90°. The bottom of the V-shaped surface is provided with a vertical threaded through hole with the same number of spring coils, and the position of the threaded through hole is consistent with the position of the contact point of the spring wire at the bottom of the V-shaped base. The V-shaped base (101) has several vertical through holes (103) on the top end faces of both sides of the V-shaped surface. The V-shaped base (101) has several horizontal through holes (104) on its two sides. The V-shaped base (101) has two blind holes (105) on each of its front and rear end faces. The leveling bolt (102) is set in the threaded through hole. The bottom end of the leveling bolt (102) is in direct contact with the lowest point of the bottom of the single coil spring wire, ensuring that the leveling bolt (102) can directly control the height of the single coil spring wire by the depth in the threaded through hole. The threaded post of the leveling bolt (102) is marked with a mark representing the initial position; The two end fixing block assemblies (200) are respectively disposed on the front and rear end faces of the V-shaped base; Each of the two end fixing block assemblies (200) includes an end fixing block (201), two tightening screws (202) and a tightening nut (203); The end fixing block (201) is an equilateral triangular plate structure with rounded edges; the top of the end fixing block (201) has a first through hole for the spring wire at the end to pass through, and the bottom has two second through holes for fixing the end fixing block (201) to the end face of the V-shaped base (101); the two tightening screws (202) cooperate with the two blind holes (105), and the two tightening screws (202) pass through the two second through holes and are set in the two blind holes (105) respectively, fixing the end fixing block (201) to the end face of the V-shaped base (101); The tightening nut (203) engages with the end of the spring wire; when the spring is placed on the V-shaped base and at its natural length, the spring wire at the end of the spring passes through the first through hole, and the tightening nut (203) is set on the spring wire at the end of the spring to fix the spring wire to the end fixing block; Each of the two L-shaped pressure plate assemblies (300) includes an L-shaped pressure plate (301) and a plurality of tightening screws (302); the L-shaped pressure plate (301) is composed of a top plate and a side plate, and the outer end face of the top plate is inclined and in contact with the spring wire; The top plate and side plate are evenly provided with the same number of horizontal and vertical through holes in opposite positions, which respectively cooperate with the vertical through holes (103) and horizontal through holes (104) on the V-shaped base; The two surfaces of the V-shaped surface and the inclined surfaces of the two L-shaped pressure plates together clamp and position the spring, thereby fixing the spring.

2. The leveling device for spring grinding according to claim 1, characterized in that: The side plate is arranged parallel to the side of the V-shaped base (101), and its width does not exceed the height of the V-shaped base; the top plate is arranged parallel to the top surface of the V-shaped base (101), and its width does not exceed half the width of the V-shaped base.

3. The leveling device for spring grinding according to claim 1, characterized in that: The two blind holes (105) are symmetrical about the central axis of the V-shaped surface.

4. The leveling device for spring grinding according to claim 1, characterized in that: The top plate and side plate of the L-shaped pressure plate (301) are evenly provided with a number of horizontal and vertical through holes of the same number and opposite positions.

5. The leveling device for spring grinding according to claim 1, characterized in that: The V-shaped surface at the top of the V-shaped base has an angle of 90°.

6. The leveling device for spring grinding according to claim 1, characterized in that: The end fixing block (201) is an equilateral triangular plate structure.

7. The leveling device for spring grinding according to claim 1, characterized in that: The bottom of the V-shaped base is hollow.

8. A spring grinding leveling method using the spring grinding leveling device according to any one of claims 1 to 7, characterized in that, Includes the following steps: Step 1: Screw the leveling bolt (102) into the threaded through hole at the bottom of the V-shaped base (101), and use the leveling bolt (102) to level each ring of the spring; Step 2: Pass both ends of the spring wire through the top through holes of the two end fixing blocks (201) respectively, and fix them with tightening nuts (203); Step 3: Slowly screw the tightening screws (202) on the two end fixing blocks (201) into the threaded holes of the V-shaped base (101) to fix the two end fixing blocks (201) on the V-shaped base; Step 4: Pass the tightening screw (302) through the horizontal through hole (104) and vertical through hole (103) of the two L-shaped pressure plates (301), and screw it into the vertical through hole (103) and horizontal through hole (104) on the V-shaped base respectively, so that the inclined surfaces of the two L-shaped pressure plates (301) clamp the spring but do not completely clamp the spring (401); Step 5: Using the height of the first ring of the spring (401) as a reference, use a dial indicator to measure the runout of each ring of the spring. Tighten or loosen the leveling bolt (102) in sequence to make the runout of each ring of the spring consistent. Then continue to tighten the screw (302) until the two L-shaped pressure plates (301) completely clamp and fix the spring (401). Step 6: Place the spring grinding and leveling device on a vertical grinding machine to process artificially pre-set damage defects on the outer surface of the spring (401).

9. The spring grinding and leveling method according to claim 8, characterized in that: In step 1, the initial position of the threaded post of the leveling bolt (102) is marked; when the leveling bolt (102) is used to level each ring of the spring, the initial position of the threaded post is taken as the reference.

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