A torsion spring end cutting device

Abstract

The application discloses a torsional spring end cutting device, relates to the torsional spring production and processing technical field, and solves the problem that the existing cutting mode cannot achieve the problem of flat end cutting of the torsional spring. The device comprises a mounting plate, a fixing seat arranged on the mounting plate, the mounting plate being horizontally movable, at least one limiting unit, the limiting unit comprising two symmetrically arranged limiting blocks, a first positioning block arranged between the two limiting blocks, at least one positioning mechanism, at least one pressing mechanism, at least one cutting machine, and a feeding driving mechanism driving connected with the mounting plate and used for controlling the torsional spring on the limiting unit to approach or move away from the cutting machine. The device can accurately and quickly position the torsional spring in terms of the placing angle and the front and back positions, the end of the cut torsional spring is smooth and free of burrs, the customer demand is met, and the size consistency of each cut torsional spring is good due to the accurate positioning of the spring during cutting.

Description

Technical Field

[0001] This invention relates to the field of torsion spring production and processing technology, and in particular to a torsion spring end cutting device. Background Technology

[0002] Existing coiling machines in torsion spring production equipment use a shearing method for cutting. This method works by using two metal blades to squeeze and cut the steel wire. Most machines use ordinary shearing, while a few imported or newer domestic machines use oscillating shearing. Regardless of the shearing method, due to the limitations of extrusion cutting, it is impossible to achieve flush ends; both methods result in uneven ends.

[0003] Due to increasingly stringent requirements in automobile manufacturing, many machines now demand that torsion springs have flush ends, free from concavity, convexity, and burrs. This presents a challenge for spring manufacturing. Because the principles of shearing are relatively limited, solving the problem in equipment cutting is difficult. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems by designing a torsion spring end cutting device, which solves the problem that existing cutting methods cannot achieve a flush cut at the end of the torsion spring.

[0005] The technical solution of the present invention to achieve the above objectives is a torsion spring end cutting device, comprising:

[0006] Mounting plate, wherein a fixed base is provided on the mounting plate, and the mounting plate is horizontally movable;

[0007] At least one limiting unit is mounted on a mounting plate. The limiting unit includes two symmetrically arranged limiting blocks with a gap between them to form a limiting space for limiting the torsion spring. The gap between the two limiting blocks is adjustable. The opposite sides of the two limiting blocks have inclined surfaces for supporting the torsion spring. A first positioning block for positioning the rear end of the torsion spring is provided between the two limiting blocks.

[0008] At least one positioning mechanism, the positioning mechanism including a rotating rod horizontally rotatably connected to a fixed base and a second positioning block disposed at the front end of the rotating rod, the second positioning block being able to abut against the end and the tip of the torsion spring respectively, so as to position the end and the placement angle of the torsion spring.

[0009] At least one pressing mechanism is disposed above the limiting unit for pressing the torsion spring;

[0010] At least one cutting machine having a cutting blade whose cutting direction is aligned with the axis of the torsion spring;

[0011] A feed drive mechanism, which is drivenly connected to the mounting plate, is used to control the torsion spring located on the limiting unit to move closer to or away from the cutting machine.

[0012] As one implementation, the machine base is also included, the feed drive mechanism is horizontally fixed on the machine base, a support base is provided on the machine base, and the cutting machine is horizontally fixed on the support base.

[0013] As one implementation, the machine base is equipped with a sliding front proximity switch, a middle proximity switch, and a rear proximity switch, which are located on one side of the feed drive mechanism and are used to detect the moving position of the mounting plate.

[0014] In one implementation, a receiving tray is provided on the machine base, and the receiving tray is placed below the cutting blade.

[0015] As one implementation, the positioning mechanism further includes a connecting sleeve disposed at the front end of the rotating rod and a connecting plate that can be movably connected to the connecting sleeve vertically, wherein the second positioning block is fixed at the lower end of the connecting plate.

[0016] As one embodiment, the connecting plate has a waist-shaped hole extending along the length of the connecting plate.

[0017] As one implementation, the opposite sides of the two limiting blocks have bevels to accommodate torsion springs of different diameters.

[0018] As one implementation, the limiting block has an oblong hole that extends along the distance between the two limiting plates.

[0019] As one implementation, the pressing mechanism includes a vertically arranged pressing cylinder and a pressure plate connected to the output end of the pressing cylinder.

[0020] As one implementation scheme, two of each of the limiting unit, positioning mechanism, pressing mechanism and cutting machine are provided, and the two limiting units, two positioning mechanisms, two pressing mechanisms and two cutting machines are distributed symmetrically.

[0021] Its advantages over existing technologies are:

[0022] This invention uses a limiting unit to limit the torsion spring. When the torsion spring is placed in the limiting space formed between two limiting blocks, the inclined surfaces on the two limiting blocks support the torsion spring and prevent it from rolling left and right. The distance between the two limiting blocks can be adjusted according to the diameter of the torsion spring to determine the center height of the torsion spring. The rear end of the torsion spring is blocked and positioned by the first positioning block to determine the front and rear position of the torsion spring. By rotating the rotating rod, the second positioning block is brought into close contact with the upper rear side of the torsion spring and the end of the torsion spring to determine the placement angle of the torsion spring. The top of the torsion spring is pressed by a pressing mechanism. Through multiple methods, the torsion spring is finally positioned quickly and accurately.

[0023] During cutting, the feed drive mechanism controls the torsion spring to approach the cutting blade, and the cutting machine controls the rotation of the cutting blade to cut the end of the torsion spring away from the first positioning block. The cut torsion spring end is smooth and free of burrs, meeting customer requirements. Because the spring is positioned quickly and accurately during cutting, the dimensions of each cut torsion spring are highly consistent.

[0024] The cutting machine only rotates when the feed drive mechanism is feeding; at all other times, the cutting machine remains stationary, ensuring safety by keeping the cutting blade stationary during employee loading and unloading of parts. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the torsion spring end cutting equipment;

[0026] Figure 2 It is a schematic diagram of the installation structure of each mechanism on the machine;

[0027] Figure 3 yes Figure 2 Another structural diagram from another perspective;

[0028] Figure 4 This is a schematic diagram of the structure when the limiting unit, pressing mechanism, and positioning mechanism position the torsion spring.

[0029] Figure 5 yes Figure 4 A structural diagram from another perspective.

[0030] In the diagram, 1. Machine base; 2. Mounting plate; 201. Clearance groove; 3. Fixed base; 4. Feed drive mechanism; 5. Limiting unit; 51. Limiting block; 6. Positioning mechanism; 61. Rotating rod; 62. Connecting sleeve; 63. Connecting plate; 631. Waist-shaped hole; 64. Second positioning block; 7. Cutting machine; 71. Cutting blade; 8. Pressing mechanism; 81. Pressing cylinder; 82. Pressure plate; 9. Protective cover; 10. Front proximity switch; 11. Middle proximity switch; 12. Rear proximity switch; 13. First positioning block; 14. Receiving tray. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] like Figure 1 As shown, a preferred embodiment of the present invention provides a torsion spring end cutting device. After the torsion spring is positioned, the cutting device uses the basic principle of metal cutting machine 7 to cut the uneven part of the torsion spring end.

[0033] For details, please refer to Figure 2 , Figure 3 The cutting equipment mainly consists of a machine base 1, a feed drive mechanism 4, a mounting plate 2, a fixed base 3, a pressing mechanism 8, a limit unit 5, a positioning mechanism 6, and a cutting machine 7.

[0034] The feed drive mechanism 4 is horizontally fixed on the machine base 1. In this embodiment, the feed drive mechanism 4 adopts a motor-lead screw module, and the mounting plate 2 is mounted on this module. The motor controls the lead screw to rotate, thereby driving the mounting plate 2 to move horizontally. The direction of movement is towards or away from the cutting machine 7.

[0035] The mounting base 3 has a slotted hole and is fixed to the mounting plate 2 by bolts, so the installation position of the mounting base 3 is adjustable. The adjustment direction is consistent with the movement direction of the mounting plate 2.

[0036] In this embodiment, two of each of the pressing mechanism 8, limiting unit 5, positioning mechanism 6, and cutting machine 7 are provided, forming two workstations. Each workstation has one pressing mechanism 8, limiting unit 5, positioning mechanism 6, and cutting machine 7, which can simultaneously cut the ends of two torsion springs to improve production efficiency.

[0037] Two limiting units 5 are mounted on the mounting plate 2, located in front of the fixed base 3, and are symmetrically distributed. Two pressing mechanisms 8 correspond one-to-one with the two limiting units 5, and are located directly above the limiting units 5, fixed on the fixed base 3. Two positioning mechanisms 6 also correspond one-to-one with the two limiting units 5, and are both mounted on the fixed base 3. Two cutting machines 7 correspond one-to-one with the two limiting units 5, and are symmetrically distributed.

[0038] Since torsion springs vary in size and length, it is essential to accurately and quickly fix them while considering the versatility of the fixing fixture. The adjustable structure of the limiting unit 5 is designed to solve this problem.

[0039] like Figure 4 , Figure 5As shown, the limiting unit 5 consists of two limiting blocks 51 arranged opposite each other, with a certain distance between the two limiting blocks 51 to form a limiting space for limiting the left and right sides of the torsion spring. Each of the two limiting blocks 51 has an inclined surface on its opposite side to prevent the torsion spring from moving left and right, and can also accommodate torsion springs of different diameters.

[0040] Two oblong holes are provided on opposite sides of the two limiting blocks 51. Bolts pass through the oblong holes and are threaded into the mounting plate 2, thereby fixing the limiting blocks 51. The extension direction of the oblong holes is consistent with the adjustment direction of the distance between the two limiting blocks 51, so as to adjust the distance between the two limiting blocks 51 to accommodate torsion springs of different diameters and adjust the axial height of the torsion springs.

[0041] A first positioning block 13 is provided between the two limiting blocks 51. The first positioning block 13 is fixed to the mounting plate 2 by bolts and is used to position the end of the torsion spring. After the torsion spring is placed between the two limiting blocks 51, the end of the torsion spring is close to the first positioning block 13.

[0042] An oblong hole is provided on the first positioning block 13. The extension direction of the oblong hole is consistent with the axial direction of the torsion spring, so as to adjust the position of the first positioning block 13 and meet the positioning requirements of torsion springs of different lengths.

[0043] Continue to refer to Figure 4 , Figure 5 The positioning mechanism 6 mainly consists of a rotating rod 61, a connecting sleeve 62, a connecting plate 63, and a second positioning block 64. The rotating rod 61 is horizontally positioned and rotatably connected to the fixed base 3, while the connecting sleeve 62 is connected to the front end of the rotating rod 61. The connecting sleeve 62 has a threaded hole, and the connecting plate 63 is fixed to the connecting sleeve 62 by bolts, with the bolts threaded into the threaded hole. The second positioning block 64 is fixed to the lower end of the connecting plate 63, and its angle can be adjusted by rotating the rotating rod 61.

[0044] refer to Figure 4 A slotted hole 631 is provided on the connecting plate 63, extending along the length of the connecting plate 63 to adjust the vertical height of the second positioning block 64 and accommodate torsion springs of different diameters. At least two bolts are provided in the slotted hole 631, and the connecting plate 63 is fixed to the connecting sleeve 62 by the two bolts to prevent the connecting plate 63 from rotating relative to the connecting sleeve 62, thus ensuring the accuracy of the angle adjustment of the second positioning block 64.

[0045] The rotating rod 61 has an external thread in the central area, and nuts (not shown in the figure) are located on both sides of the fixed seat 3 on the rotating rod 61. After the angle of the second positioning block 64 is adjusted, the two nuts can be tightened, and the two nuts will clamp the fixed seat 3, thereby preventing the rotating rod 61 from rotating.

[0046] The torsion spring is formed by spiraling steel wire, so both ends of the torsion spring have ends (i.e., the cut ends of the steel wire). Since different torsion springs have different cutting requirements and different cutting lengths, the placement angle of the torsion spring needs to be adjusted after it is placed between the two limit blocks 51.

[0047] After the torsion spring is placed between the two limiting blocks 51, the end of the torsion spring will be close to the first positioning block 13. At the same time, by rotating the rotating rod 61, the rotation angle of the second positioning block 64 is adjusted so that the front side of the second positioning block 64 is close to the end of the torsion spring, and the other side is close to the end of the torsion spring (i.e., the cut end of the steel wire). Simultaneously, the positions of the two limiting blocks 51 are adjusted to match the rotation position of the second positioning block 64. Then, the torsion spring is pressed tightly by the pressing mechanism 8.

[0048] In other words, the torsion spring is pressed down by a cylinder at the top, and the center height of the torsion spring is determined by adjusting the distance between the two limit blocks 51 at the bottom. The first positioning block 13 at the rear determines the front and rear position of the torsion spring, and the second positioning block 64 at the rear determines the angle of the torsion spring. By taking multiple factors into consideration, the torsion spring can be positioned quickly and accurately.

[0049] The pressing mechanism 8 consists of a pressing cylinder 81 and a pressure plate 82. The pressing cylinder 81 is vertically fixed on the fixed base 3. The pressure plate 82 is connected to the output end of the pressing cylinder 81. The pressing cylinder 81 controls the pressure plate 82 to move downward and press the torsion spring.

[0050] See Figure 2 Two support bases are provided on the machine base 1. Two cutting machines 7 are horizontally fixed on the two support bases respectively. Each cutting machine 7 has a cutting blade 71, and the cutting machine 7 controls the rotation of the cutting blade 71 to cut the end of the torsion spring.

[0051] The cutting blade 71 is set vertically, and the cutting direction of the cutting blade 71 is consistent with the axial direction of the torsion spring to ensure that the end of the torsion spring is cut flat and even.

[0052] During cutting, the feed drive mechanism 4 controls the torsion spring to approach the cutting disc 71 to complete the cutting. After cutting, it returns to its original position.

[0053] By employing two 1KW servo motors with a speed of 3500 rpm as the power output for rotary cutting, and using one 1.5KW servo motor with a speed of 2000 rpm and a closed ball screw transmission mechanism with a stroke of 300 mm as the power output, simultaneous cutting by two torsion springs can be achieved.

[0054] The cutting disc 71 is an industrial cutting disc with a thickness of 1.2 mm. Although it can cut metal, the cutting disc 71 inevitably becomes smaller and smaller over time during the cutting process. If the feed stroke of the lead screw motor is fixed, the worn-down cutting disc 71 will not be able to contact the torsion spring. This application adds a compensation setting to the equipment's program settings, and a set of error-proof combination buttons (two buttons) controls the feed to achieve rapid feed compensation of 0.5 mm.

[0055] See Figure 4 The mounting plate 2 has a clearance groove 201 at the corresponding part, which extends between the two limiting blocks 51 and plays a role in avoiding the cutting of the cutting blade 71.

[0056] like Figure 3 As shown, a front proximity switch 10, a middle proximity switch 11, and a rear proximity switch 12 are sequentially arranged on one side of the feed drive mechanism 4, with the three proximity switches distributed along the direction closest to the cutting machine 7. The front proximity switch 10, the middle proximity switch 11, and the rear proximity switch 12 are horizontally slidably connected to the slide rail on the machine base 1 to adjust the position of the three proximity switches. The movement position of the mounting plate 2 is detected by the three proximity switches.

[0057] When the feed drive mechanism 4 controls the torsion spring to approach the cutting blade 71, a signal is triggered when the mounting plate 2 moves to the position of the front proximity switch 10, and the cutting machine 7 is ready to start. When the mounting plate 2 moves to the position of the middle proximity switch 11, the torsion spring will move slowly, and the cutting blade 71 will begin to cut the end of the torsion spring. When the mounting plate 2 moves to the position of the rear proximity switch 12, it indicates that the cutting is complete, the torsion spring stops approaching the cutting blade 71, and the feed drive mechanism 4 controls the torsion spring to return to its original position.

[0058] In other words, the cutting motor only rotates when the feed screw motor is moving; the cutting motor does not rotate when the screw is not rotating. Furthermore, the equipment is protected by a safety shell in the cutting section to ensure safe operation by personnel.

[0059] like Figure 2 As shown, there is a rectangular hole on the machine base 1, which is located between two cutting machines 7. The receiving tray 14 is supported in the rectangular hole. The receiving tray 14 has handles on both sides. After the torsion spring finishes cutting, the operator puts the torsion spring into the receiving tray 14, and then loads material until the receiving tray 14 is full. Then the operator holds the handles and removes the receiving tray 14, and places an empty receiving tray 14 in its place.

[0060] See Figure 1 A protective cover 9 is also installed on the machine 1. The protective cover 9 covers the torsion spring and the cutting machine 7 to ensure that the operator will not be injured in extreme situations such as the cutting disc 71 bursting or the cutting end of the torsion spring flying.

[0061] The above technical solutions only embody the preferred technical solutions of the present invention. Any modifications that may be made by those skilled in the art to certain parts thereof embody the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A torsion spring end cutting device, characterized in that, include: Mounting plate (2), on which a fixing seat (3) is provided, the mounting plate (2) is horizontally movable; At least one limiting unit (5) is mounted on the mounting plate (2). The limiting unit (5) includes two symmetrically arranged limiting blocks (51). There is a gap between the two limiting blocks (51) to form a limiting space for limiting the torsion spring. The gap between the two limiting blocks (51) is adjustable. The opposite sides of the two limiting blocks (51) have inclined surfaces for bearing the torsion spring. A first positioning block (13) for positioning the rear end of the torsion spring is provided between the two limiting blocks (51). At least one positioning mechanism (6) includes a rotating rod (61) horizontally rotatably connected to a fixed base (3), a second positioning block (64) disposed at the front end of the rotating rod (61), a connecting sleeve (62) disposed at the front end of the rotating rod (61), and a connecting plate (63) capable of being movably connected to the connecting sleeve (62) vertically. The second positioning block (64) is fixed at the lower end of the connecting plate (63). The second positioning block (64) can abut against the end and the end head of the torsion spring respectively to position the end and the placement angle of the torsion spring. The connecting plate (63) has a waist-shaped hole extending along the length direction of the connecting plate (63). At least one pressing mechanism (8) is disposed above the limiting unit (5) for pressing the torsion spring; At least one cutting machine (7) having a cutting blade (71) whose cutting direction is consistent with the axis of the torsion spring; The feed drive mechanism (4) is driven to connect with the mounting plate (2) and is used to control the torsion spring located on the limiting unit (5) to move closer to or away from the cutting machine (7).

2. The torsion spring end cutting device according to claim 1, characterized in that, It also includes a machine base (1), the feed drive mechanism (4) is horizontally fixed on the machine base (1), a support base is provided on the machine base (1), and the cutting machine (7) is horizontally fixed on the support base.

3. The torsion spring end cutting device according to claim 2, characterized in that, The machine base (1) is equipped with a sliding front proximity switch (10), a middle proximity switch (11) and a rear proximity switch (12). The front proximity switch (10), the middle proximity switch (11) and the rear proximity switch (12) are located on one side of the feed drive mechanism (4) and are used to detect the moving position of the mounting plate (2).

4. The torsion spring end cutting device according to claim 2, characterized in that, The machine base (1) is provided with a receiving tray (14), which is placed below the cutting disc (71).

5. The torsion spring end cutting device according to claim 1, characterized in that, The limiting block (51) has a waist-shaped hole that extends along the distance between the two limiting plates.

6. The torsion spring end cutting device according to claim 1, characterized in that, The pressing mechanism (8) includes a vertically arranged pressing cylinder (81) and a pressure plate (82) connected to the output end of the pressing cylinder (81).

7. The torsion spring end cutting device according to claim 1, characterized in that, The limiting unit (5), positioning mechanism (6), pressing mechanism (8) and cutting machine (7) are each provided in two, and the two limiting units (5), two positioning mechanisms (6), two pressing mechanisms (8) and two cutting machines (7) are distributed symmetrically.

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