U-shaped gasket stamping unreeling machine

Abstract

A U-shaped gasket stamping unreeling machine comprises a base, a driving box and an unreeling shaft, the outer wall of the unreeling shaft is provided with trapezoidal multi-head threads and is in threaded connection with a shaft sleeve, the outer wall of the shaft sleeve is connected with a tensioning plate through a plurality of sets of connecting arms inclining towards the direction of side plates, an adjusting block is arranged at the end of the unreeling shaft, and the shaft sleeve is driven to move axially by rotating the unreeling shaft. A locking nut is further connected to the unwinding shaft in a screwed mode, a composite damping gasket with an annular cavity is arranged between the locking nut and the shaft sleeve in a sleeved mode and used for locking and looseness prevention, and a turnover supporting mechanism is arranged on the base. A supporting wheel driven by a supporting air cylinder can stably support the far end of an unwinding shaft, and a tension control assembly driven by a tension air cylinder is further arranged on one side of a base and used for accurately adjusting unwinding tension. The tensioning device is compact in structure and convenient to operate, and has the advantages of stable tensioning force, reliable locking, good far-end support, accurate tension control and the like.

Description

Technical Field

[0001] This utility model relates to the field of stamping equipment technology, and in particular to a U-shaped gasket stamping and unwinding machine. Background Technology

[0002] In the stamping production process of U-shaped gaskets, coiled strip (such as steel coil) needs to be mounted on an uncoiling machine. The uncoiling machine unwinds the strip and conveys it to the stamping die for stamping. Existing uncoiling machines typically include an expansion and contraction mechanism to support the steel coil and a tension control mechanism to control the uncoiling tension. However, existing uncoiling machines have the following shortcomings in actual use: 1. The expansion and contraction mechanism has a relatively complex structure, is inconvenient to operate, and has unstable clamping force on the steel coil, which can easily cause the steel coil to loosen or swing during uncoiling, affecting the stability of feeding; 2. For heavier steel coils, the far end of the uncoiling shaft lacks effective support, which can easily lead to bending and deformation of the uncoiling shaft over long-term use, affecting the accuracy and service life of the equipment; 3. The tension adjustment is not sensitive or precise enough, making it difficult to ensure a constant tension of the strip during conveying, thus affecting the stamping quality of the U-shaped gasket. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a U-shaped gasket stamping and unwinding machine with reasonable structural design, convenient operation, stable support, and precise tension control.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a U-shaped gasket stamping and unwinding machine, including a base and a drive box set on the base. An unwinding shaft is rotatably connected to the drive box. The outer wall of the unwinding shaft is provided with a trapezoidal multi-start thread. A bushing is screwed to the outer wall of the unwinding shaft. A side plate is provided on the side of the unwinding shaft near the drive box. Several sets of tensioning components for supporting steel coils are evenly provided along the circumference of the outer wall of the bushing. Each set of tensioning components includes a tensioning plate. A connecting piece that is slidably connected to the side plate is provided on one side of the tensioning plate. Several connecting arms that are inclined towards the side plate are hinged between the inner wall of the tensioning plate and the outer wall of the bushing. An adjusting block is provided at the end of the unwinding shaft. A locking nut that abuts against the end of the bushing is screwed to the unwinding shaft. A composite damping washer is sleeved between the locking nut and the bushing on the unwinding shaft.

[0005] Preferably, the inner wall of the tensioning plate and the outer wall of the bushing are respectively provided with a first connecting seat and a second connecting seat along the axial direction of the unwinding shaft. The two ends of the connecting arm are respectively hinged to the first connecting seat and the second connecting seat. The side plate is provided with a limiting opening along its radial direction at the location corresponding to the tensioning plate. The end of the connecting piece extends through the limiting opening to the other side of the side plate and is provided with a support bearing supported on the side plate.

[0006] Preferably, at least one set of the tensioning components has a stop on the tensioning plate. The stop is in the shape of an "A". The two ends of the stop are bent inward to form hooks that abut against the two sides of the tensioning plate. The outer wall of the tensioning plate has a locking groove along its axial direction. The stop is provided with a locking bolt that abuts against the locking groove.

[0007] Preferably, the bushing has a self-lubricating liner embedded in the inner wall of the side facing the unwinding shaft end. The inner wall of the self-lubricating liner has an internal thread that mates with the trapezoidal multi-start thread. The composite damping washer includes two metal pressure rings and a rubber elastomer bonded between the two metal pressure rings. Multiple annular cavities are opened on both sides of the rubber elastomer.

[0008] Preferably, the base has a support mechanism on the lower side of the far end of the unwinding shaft. The support mechanism includes a support frame, which is mounted on the base by hinges and fixed by bolts. The bottom of the support frame is provided with a shock-absorbing pad, and the top of the support frame is provided with a support cylinder. The piston rod end of the support cylinder is provided with a support seat, and two sets of support wheels for supporting the end of the unwinding shaft are rotatably provided in the support seat.

[0009] Preferably, the base has a tension control assembly on one side of the unwinding shaft. The tension control assembly includes a tension frame rotatably mounted on the base, a plurality of tension rollers on the tension frame, a tension cylinder hinged to the base, and a transmission arm on the tension frame. The movable end of the transmission arm is hinged to the piston rod end of the tension cylinder.

[0010] Preferably, the tension roller located on the upper side of the tension frame has sliders at two points, and the tension frame has a groove. The sliders are slidably disposed in the groove, and an adjusting screw is screwed onto the slider. The top of the adjusting screw is provided with a retaining ring that can be engaged with the tension frame and a rotating wheel for rotating the adjusting screw.

[0011] Preferably, the adjusting block has an adjusting hole.

[0012] The beneficial effects of this utility model are:

[0013] 1. By rotating the unwinding shaft, the drive bushing moves axially. The inclined connecting arm converts the axial movement into the radial movement of the tensioning plate, realizing the rapid tensioning and unwinding of the steel coil. The structure is simple, the operation is convenient, and the tensioning force is uniform and reliable.

[0014] 2. By cooperating with the lock nut and the composite damping washer, the bushing can be effectively locked after adjustment. The annular cavity structure of the composite damping washer can provide stable elastic damping and friction, preventing the bushing from loosening under vibration and ensuring the stability of the tension state.

[0015] 3. By setting a support mechanism at the far end of the unwinding shaft, reliable support can be provided to the end of the unwinding shaft, preventing the unwinding shaft from bending due to excessive weight of the steel coil, thus improving the stability and service life of the equipment.

[0016] 4. By driving the tension roller to swing through the tension cylinder, the unwinding tension of the strip can be precisely controlled, ensuring the stability and consistency of feeding during the stamping process, which helps to improve the finished quality of the U-shaped gasket. Attached Figure Description

[0017] Figure 1 This is a front view of an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0019] Figure 3 This is a utility model Figure 2 Enlarged view of point A;

[0020] Figure 4 This is a utility model Figure 2 Enlarged view of point B;

[0021] Figure 5 This is a utility model Figure 2 Enlarged view of point C;

[0022] Figure 6 This is a side view of an embodiment of the present utility model;

[0023] Figure 7 This is a utility model Figure 6 Enlarged view of point D.

[0024] In the diagram: 1. Base; 2. Drive box; 3. Unwinding shaft; 31. Trapezoidal multi-start thread; 32. Side plate; 33. Limiting port; 34. Adjusting block; 35. Support bearing; 36. Adjusting hole; 4. Bushing; 41. Second connecting seat; 42. Connecting arm; 43. Self-lubricating liner; 5. Tensioning assembly; 51. Tensioning plate; 52. Connecting piece; 53. First connecting seat; 54. Locking groove; 6. Locking nut; 7. Composite damping washer; 71. Metal pressure ring; 72. Rubber elastomer 73. Annular cavity; 8. Stop; 81. Hook; 82. Locking bolt; 9. Support mechanism; 91. Support frame; 92. Hinge; 93. Shock-absorbing pad; 94. Support cylinder; 95. Support seat; 96. Support wheel; 97. Fixing bolt; 10. Tension control assembly; 101. Tension frame; 102. Tension roller; 103. Tension cylinder; 104. Transmission arm; 105. Slider; 106. Slide groove; 107. Adjusting screw; 108. Snap ring; 109. Rotary wheel. Detailed Implementation

[0025] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0026] Example: Figures 1 to 7 The U-shaped gasket stamping and unwinding machine shown includes a base 1 and a drive box 2 mounted on the base 1. An unwinding shaft 3 is rotatably connected to the drive box 2. The drive box 2 is equipped with a drive motor and a reduction mechanism (not shown in the figure) for driving the unwinding shaft 3 to rotate.

[0027] The outer wall of the unwinding shaft 3 is provided with a trapezoidal multi-start thread 31. A bushing 4 is screwed onto the outer wall of the unwinding shaft 3. In order to reduce wear, a self-lubricating liner 43 is embedded in the inner wall of the bushing 4 facing the end of the unwinding shaft 3. The inner wall of the self-lubricating liner 43 is provided with an internal thread that matches the trapezoidal multi-start thread 31. A side plate 32 is provided on the side of the unwinding shaft 3 near the drive box 2.

[0028] The outer wall of the bushing 4 is uniformly provided with several sets (four sets in this embodiment) of tensioning components 5 for supporting the steel coil. Each set of tensioning components 5 includes an arc-shaped tensioning plate 51. One side of the tensioning plate 51 is provided with a connecting piece 52 that is slidably connected to the side plate 32. The side plate 32 is provided with a limiting opening 33 in its radial direction corresponding to the tensioning plate 51. The end of the connecting piece 52 extends through the limiting opening 33 to the other side of the side plate 32, and the end is provided with a support bearing 35. The support bearing 35 is provided on the side plate 32 and abuts against the side surface of the side plate 32, which can guide and support the radial movement of the tensioning plate 51.

[0029] The inner wall of the tensioning plate 51 and the outer wall of the bushing 4 are respectively provided with a first connecting seat 53 and a second connecting seat 41 along the axial direction of the unwinding shaft 3. Several connecting arms 42 inclined towards the side plate 32 are hinged between the first connecting seat 53 and the second connecting seat 41. When the bushing 4 moves along the axial direction of the unwinding shaft 3, it will drive the tensioning plate 51 to move radially along the unwinding shaft 3 through the inclined connecting arms 42, thereby achieving tensioning or contraction.

[0030] The unwinding shaft 3 has an adjusting block 34 at its end, and an adjusting hole 36 is provided on the adjusting block 34. During operation, the adjusting block 34 can be clamped with a wrench, or an adjusting rod such as a pry bar can be passed through the adjusting hole 36 to rotate the unwinding shaft 3, which is very labor-saving.

[0031] A locking nut 6 is screwed onto the unwinding shaft 3, which abuts against the end of the bushing 4. A composite damping washer 7 is fitted between the locking nut 6 and the bushing 4 on the unwinding shaft 3. The composite damping washer 7 includes two metal pressure rings 71 and a rubber elastomer 72 bonded between the two metal pressure rings 71. Multiple annular cavities 73 are provided on both sides of the rubber elastomer 72. This structure can provide a stable and elastic damping force. When the locking nut 6 is tightened, it can effectively prevent the bushing 4 from loosening due to vibration.

[0032] At least one tensioning assembly 5 has a tensioning plate 51 with a stop 8. The stop 8 is in the shape of an "A". The two ends of the stop 8 are bent inward to form hooks 81 that abut against the two sides of the tensioning plate 51, so that it is firmly locked on the tensioning plate 51. The outer wall of the tensioning plate 51 has a locking groove 54 along its axial direction. The stop 8 is provided with a locking bolt 82. The end of the locking bolt 82 abuts against the locking groove 54. The stop 8 is used to axially limit the side of the steel coil to prevent it from moving during the unwinding process.

[0033] The base 1 has a support mechanism 9 on the lower side of the far end of the unwinding shaft 3. The support mechanism 9 includes a support frame 91. The support frame 91 is flipped onto the base 1 by a hinge 92 and fixed by a fixing bolt 97. It can be flipped outward to facilitate loading and unloading of steel coils. The bottom of the support frame 91 is provided with a shock-absorbing pad 93. The top of the support frame 91 is vertically provided with a support cylinder 94. The piston rod end of the support cylinder 94 is provided with a support seat 95. Two sets of support wheels 96 for supporting the end of the unwinding shaft 3 are rotatably provided in the support seat 95. After the steel coil is loaded, the support frame 91 is flipped to the working position, and the support cylinder 94 is activated so that the support wheels 96 press against the end of the unwinding shaft 3 to form a stable support.

[0034] The base 1 has a tension control assembly 10 on one side of the unwinding shaft 3. The tension control assembly 10 includes a tension frame 101 rotatably mounted on the base 1, with several tension rollers 102 on the tension frame 101. A tension cylinder 103 is also hinged to the base 1. A transmission arm 104 is mounted on the tension frame 101, and the movable end of the transmission arm 104 is hinged to the piston rod end of the tension cylinder 103. After the strip is drawn from the steel coil, it passes over the tension rollers 102. The tension cylinder 103 drives the tension frame 101 to swing, which can precisely control the unwinding tension of the strip. Slider 105s are provided at two points on the tension roller 102 on the upper side of the tension frame 101. A groove 106 is provided in the tension frame 101. The slider 105 is slidably disposed in the groove 106. An adjusting screw 107 is screwed onto the slider 105. The top of the adjusting screw 107 is provided with a retaining ring 108 that can be locked onto the tension frame 101 and a rotating wheel 109 for rotating the adjusting screw 107. The position of the slider 105 in the groove 106 is adjusted by rotating the rotating wheel 109, thereby adjusting the spacing between the tension rollers 102 on the tension frame 101.

[0035] The working principle of this utility model is as follows: During loading, first rotate the locking nut 6 in the reverse direction to loosen it, and then drive the unwinding shaft 3 to rotate by rotating the adjusting block 34; due to the action of the trapezoidal multi-start thread 31, the bushing 4 will move axially along the unwinding shaft 3, and drive the tensioning plate 51 to contract radially through the connecting arm 42; the steel coil is placed on the contracted tensioning assembly 5, and then the unwinding shaft 3 is rotated in the reverse direction to make the bushing 4 move in the reverse direction, and the tensioning plate 51 expands radially until the inner ring of the steel coil is tightened; adjust the position of the baffle 8. Place and lock it with locking bolt 82 so that it abuts against the side of the steel coil; then tighten the locking nut 6 and lock the bushing 4 with composite damping washer 7; finally, flip the support frame 91 to the working position and start the support cylinder 94 so that the support wheel 96 abuts against the end of the unwinding shaft 3; when unwinding, the drive box 2 drives the unwinding shaft 3 to rotate, the strip is pulled out, and the tension control component 10 adjusts the position of the tension frame 101 through the tension cylinder 103, thereby accurately controlling the unwinding tension and ensuring the stable operation of the stamping process.

Claims

1. A U-shaped gasket stamping unwinding machine, comprising a base (1), a drive box (2) arranged on the base (1), and an unwinding shaft (3) rotatably connected to the drive box (2), characterized in that: The outer wall of the unwinding shaft (3) is provided with a trapezoidal multi-start thread (31). A bushing (4) is screwed onto the outer wall of the unwinding shaft (3). A side plate (32) is provided on the side of the unwinding shaft (3) near the drive box (2). Several sets of tensioning components (5) for supporting the steel coil are evenly provided on the outer wall of the bushing (4) along its circumference. Each set of tensioning components (5) includes a tensioning plate (51). A connecting piece (52) that is slidably connected to the side plate (32) is provided on one side of the tensioning plate (51). Several connecting arms (42) that are inclined toward the side plate (32) are hinged between the inner wall of the tensioning plate (51) and the outer wall of the bushing (4). An adjusting block (34) is provided at the end of the unwinding shaft (3). A locking nut (6) that abuts against the end of the bushing (4) is also screwed onto the unwinding shaft (3). A composite damping washer (7) is sleeved between the locking nut (6) and the bushing (4) on the unwinding shaft (3).

2. The U-clip press uncoiler according to claim 1, wherein: The inner wall of the tensioning plate (51) and the outer wall of the bushing (4) are respectively provided with a first connecting seat (53) and a second connecting seat (41) along the axial direction of the unwinding shaft (3). The two ends of the connecting arm (42) are respectively hinged to the first connecting seat (53) and the second connecting seat (41). The side plate (32) is provided with a limiting opening (33) in the radial direction corresponding to the tensioning plate (51). The end of the connecting piece (52) extends through the limiting opening (33) to the other side of the side plate (32) and the end is provided with a support bearing (35) supported on the side plate (32).

3. The U-clip press uncoiler according to claim 1, wherein: At least one set of tensioning components (5) has a stop (8) on its tensioning plate (51). The stop (8) is in the shape of an "A". The two ends of the stop (8) are bent inward to form hooks (81) that abut against the two sides of the tensioning plate (51). The outer wall of the tensioning plate (51) is provided with a locking groove (54) along its axial direction. The stop (8) is provided with a locking bolt (82) that abuts against the locking groove (54).

4. The U- gasket punch uncoiler of claim 1, wherein: The bushing (4) has a self-lubricating liner (43) embedded in the inner wall of the side facing the end of the unwinding shaft (3). The inner wall of the self-lubricating liner (43) has an internal thread that matches the trapezoidal multi-start thread (31). The composite damping washer (7) includes two metal pressure rings (71) and a rubber elastomer (72) bonded between the two metal pressure rings (71). Multiple annular cavities (73) are opened on both sides of the rubber elastomer (72).

5. The U- gasket punch uncoiler of claim 1, wherein: The base (1) has a support mechanism (9) on the lower side of the far end of the unwinding shaft (3). The support mechanism (9) includes a support frame (91). The support frame (91) is flipped onto the base (1) by a hinge (92) and fixed by a fixing bolt (97). The bottom of the support frame (91) is provided with a shock-absorbing pad (93). The top of the support frame (91) is provided with a support cylinder (94). The piston rod end of the support cylinder (94) is provided with a support seat (95). The support seat (95) is rotatably provided with two sets of support wheels (96) for supporting the end of the unwinding shaft (3).

6. The U- gasket punch uncoiler of claim 1, wherein: The base (1) has a tension control assembly (10) on one side of the unwinding shaft (3). The tension control assembly (10) includes a tension frame (101) rotatably mounted on the base (1). The tension frame (101) has several tension rollers (102). The base (1) is also hinged to a tension cylinder (103). The tension frame (101) has a transmission arm (104). The movable end of the transmission arm (104) is hinged to the piston rod end of the tension cylinder (103).

7. The U-shaped gasket stamping and unwinding machine according to claim 6, characterized in that: Slider (105) is provided at two points on the tension roller (102) located on the upper side of the tension frame (101). A groove (106) is provided in the tension frame (101). The slider (105) is slidably disposed in the groove (106). An adjusting screw (107) is screwed onto the slider (105). The top of the adjusting screw (107) is provided with a retaining ring (108) that can be locked onto the tension frame (101) and a rotating wheel (109) for rotating the adjusting screw (107).

8. The U- gasket punch uncoiler of claim 1, wherein: The adjusting block (34) has an adjusting hole (36).

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