Continuous strip punching process system for the production of cable trays

Abstract

This invention discloses a continuous punching process system for strip metal in the production of cable trays. The system includes a continuous punching device. Non-perforated metal strip drawn from the unwinding coil is continuously punched at equal intervals along its length by the continuous punching device, resulting in continuously perforated metal strip. The continuous punching device includes a rotating ring, a lifting pressure plate, and a vertical punch. An arc-shaped transition zone exists between the perforated and non-perforated metal strips, fitting in an arc shape to the upper half of the outer ring of the rotating ring. The lifting pressure plate has a punching inlet, through which the punch passes during its downward punching motion. The rotating ring has a plurality of hollowed-out waist-shaped punch holes arranged in a circumferential array. The rotation of the rotating ring causes these waist-shaped punch holes to successively overlap and connect with the punching inlet on the upper lifting pressure plate. This achieves a strictly equidistant punching process, ensuring that the hollowed-out holes on the perforated metal strip are strictly distributed in an equidistant array, thus avoiding uneven punching.

Description

Technical Field

[0001] This invention relates to the field of cable tray punching. Background Technology

[0002] Cable trays are made by bending strip metal sheets. The raw material is strip metal coil. The metal strip drawn from the metal coil is used for bending. Since the finished structure of the cable tray needs to have several holes evenly distributed in an array, these holes are used to install brackets or other accessories. In order to improve the processing efficiency of the cable tray, the metal strip on the metal coil needs to be pre-processed with the array of holes. In this way, the strip used to produce the cable tray already has the array of holes pre-existing, and the subsequent process can directly perform the bending process to form the cable tray, avoiding the need to perform a separate punching process for each bent cable tray.

[0003] This solution provides a specific solution for "pre-processing the metal strip on the metal coil with equally spaced array of holes" in the above process.

[0004] It should be noted that the process and apparatus for "processing equidistant array holes on the metal strip of the metal coil" in this solution are not limited to the field of processing cable trays. This solution is applicable to other technical fields as long as the process requirement of "processing equidistant array holes on the metal strip of the metal coil" is met. Summary of the Invention

[0005] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a continuous punching process system for strip material for the production of cable trays, which can realize a strict equidistant punching process, so that the perforated metal strip is strictly distributed in an equidistant array, avoiding the problem of uneven punching.

[0006] Technical solution: To achieve the above objectives, the present invention provides a continuous strip punching process system for the production of cable trays, comprising a continuous punching device, wherein a non-perforated metal strip drawn from the unwinding coil is continuously punched at equal intervals along the length direction by the continuous punching device, thereby continuously drawing out a perforated metal strip from the continuous punching device.

[0007] The continuous punching device includes a rotating ring, a lifting pressure plate, and a vertical punch. There is an arc transition zone between the perforated metal strip and the non-perforated metal strip. The arc transition zone is in an arc shape and fits the upper half of the outer ring of the rotating ring. There is a punching inlet on the lifting pressure plate. When the punch performs a downward punching action, it passes through the punching inlet. Several hollowed-out waist-shaped punching holes are distributed in a circular array on the rotating ring. The rotation of the rotating ring causes the several waist-shaped punching holes to overlap one after another and connect to the punching inlet on the upper lifting pressure plate.

[0008] Furthermore, the lower surface of the lifting pressure plate is an arc surface that conforms to the outer contour of the arc transition zone. The descent of the lifting pressure plate causes the lower surface of the lifting pressure plate to fit against the upper arc surface of the middle section of the arc transition zone.

[0009] Furthermore, the continuous punching device also includes a fixed plate, a punch drive device, a first rolling roller and a second rolling roller; the inner edge of the rotating ring is coaxially rotated with the outer ring of the fixed plate through a first bearing; the first rolling roller and the second rolling roller respectively roll the clockwise end and the counterclockwise end of the arc transition zone.

[0010] Furthermore, a central rotating shaft is coaxially arranged at the axis of the rotating ring, and the outer wall of one end of the central rotating shaft is rotatably engaged with the bearing hole at the axis of the fixed disk through a second bearing; an electric telescopic device extending radially along the rotating ring is fixedly installed on the central rotating shaft, and the telescopic part of the electric telescopic device is a telescopic arm.

[0011] Furthermore, the waist-shaped punch hole that coincides with the punch inlet is designated as waist-shaped punch hole a, and the waist-shaped punch hole adjacent to waist-shaped punch hole a along the counterclockwise direction of the rotating ring is designated as waist-shaped punch hole b; on the arc transition zone, the hollow hole that coincides with waist-shaped punch hole a is designated as hollow hole a, and the hollow hole that coincides with waist-shaped punch hole b is designated as hollow hole b.

[0012] The upper and lower parts of one side of the fixed plate are respectively fixed with a first limiting post and a second limiting post;

[0013] When the electric expansion joint rotates clockwise with the central shaft until the side limit contacts the second limit post, the telescopic arm is in a vertical position and aligned with the a-shaped punch hole. The telescopic arm can extend upwards and pass through the a-shaped punch hole.

[0014] When the electric expansion joint rotates counterclockwise with the central shaft until it contacts the first limiting post at the side limit, the telescopic arm is in an inclined state and aligned with the B-shaped punch hole. The telescopic arm can extend through the B-shaped punch hole.

[0015] Furthermore, a waste receiving box is fixedly installed on one side of the central rotating shaft, and a perforated waste receiving interface is provided on the upper side of the waste receiving box; when the telescopic arm is aligned with the B-shaped punch hole, the perforated waste receiving interface is exactly below the A-shaped punch hole.

[0016] Furthermore, a circular arc rack is coaxially fixed on the central rotating shaft, and a drive motor is fixedly installed on the fixed plate. The output end of the drive motor is connected to a gear, which meshes with the circular arc rack.

[0017] Furthermore, it also includes a take-up roll, a first crest support, a trough support, a second crest support, and a pair of tail guide rollers distributed vertically.

[0018] The top of the first and second peak supports is equipped with a pair of transverse support rollers and a pair of longitudinal anti-deviation rollers. The trough support is rotatably equipped with transverse trough constraint rollers at a position lower than the top of the first and second peak supports.

[0019] The perforated metal strip drawn from the continuous punching device first crosses the upper side of a pair of transverse support rollers at the top of the first crest support, then crosses the lower side of the transverse trough constraint rollers on the trough support, then crosses the upper side of a pair of transverse support rollers at the top of the second crest support, and finally passes between the two tail guide rollers before being wound into the take-up roll, so that the perforated metal strip has a wavy shape.

[0020] Beneficial effects: The continuous cycle of process S1 to S6 in this invention achieves a strict equidistant punching process, ensuring that the perforated holes on the perforated metal strip are strictly distributed in an equidistant array, thus avoiding the problem of uneven punching.

[0021] The total length of the perforated metal strip in this design has an adaptive increase and decrease elasticity within a certain range, which allows the perforated metal strip in the wavy shape to play a buffering role and avoid the risk of the perforated metal strip breaking. Attached Figure Description

[0022] Appendix Figure 1 This is a schematic diagram of the overall scheme;

[0023] Appendix Figure 2 This is a schematic diagram of the exploded structure of a continuous punching device;

[0024] Appendix Figure 3 This is a schematic diagram of the process from S1 to S3;

[0025] Appendix Figure 4 This is a schematic diagram of the process from S4 to S6;

[0026] Appendix Figure 5 This is a front view at the end of the S4 process;

[0027] Appendix Figure 6 This is a three-dimensional view of the continuous punching device from another perspective. Detailed Implementation

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] As attached Figures 1 to 6 A continuous strip punching process system for the production of cable trays, such as... Figure 1The system includes a strip unwinding device, a strip winding device, a continuous punching device 29, a first crest support 28, a trough support 27, a second crest support 26, and a pair of vertically distributed tail guide rollers 30. The tops of both the first crest support 28 and the second crest support 26 are equipped with a pair of transverse support rollers 31 and a pair of longitudinal anti-deviation rollers 32. The trough support 27 is rotatably equipped with transverse trough constraint rollers 33 at a position lower than the tops of the first crest support 28 and the second crest support 26. The non-perforated metal strip 3.1 drawn from the unwinding coil is continuously punched by the continuous punching device 29 at equal intervals along its length. The punching process continuously draws out perforated metal strips 3.3 from the continuous punching device 29. The perforated metal strips 3.3 drawn from the continuous punching device 29 first cross the upper side of a pair of transverse support rollers 31 at the top of the first crest support 28, then cross the lower side of the transverse trough constraint rollers 33 on the trough support 27, then cross the upper side of a pair of transverse support rollers 31 at the top of the second crest support 26, and finally pass between the two tail guide rollers 30 before being wound into the take-up roll, so that the perforated metal strips 3.3 have a wave-like undulating shape, and the perforated holes 1 on the perforated metal strips 3.3 are evenly distributed in an array along the length direction.

[0030] The winding rate of the take-up coil and the continuous punching rate of the continuous punching device 29 can be easily coordinated in general. However, since the winding process of the take-up coil is continuous, while the punching process of the continuous punching device 29 is intermittent, the winding rate of the take-up coil and the punching rate of the continuous punching device 29 cannot be synchronized at any time. The total length of the perforated metal strip 3.3 with a wavy shape in this solution has an adaptive elasticity of increasing and decreasing within a certain range, so that the perforated metal strip 3.3 with a wavy shape plays a buffering role and avoids the risk of the perforated metal strip 3.3 breaking.

[0031] like Figure 2 The continuous punching device 29 includes a fixed plate 13, a rotating ring 4, a lifting pressure plate 14, a punch drive device 15, a vertical punch 18, a first rolling roller 11, and a second rolling roller 7. The punch drive device 15 can be a cylinder, a hydraulic rod, or an electric telescopic device, used to drive the punch 18 to perform a downward punching action. The vertical punch 18 has an oblong cross-sectional profile. The first rolling roller 11 and the second rolling roller 7 are rotatably mounted on the rolling roller bracket 9 through bearings. The lifting pressure plate 14 is fixed on the lifting arm 16, and the lifting device 81 can drive the lifting arm 16 and the lifting pressure plate 14 to perform lifting movements.

[0032] like Figure 6 The side of the fixed disk 13 is fixed on the fixed bracket 25, and the inner edge of the rotating ring 4 is coaxially rotated with the outer ring of the fixed disk 13 through the first bearing 71.

[0033] Between the perforated metal strip 3.3 and the non-perforated metal strip 3.1, there is a circular arc transition strip 3.2. The circular arc transition strip 3.2 is attached to the upper half of the outer ring of the rotating ring 4 in an arc shape. The first rolling roller 11 and the second rolling roller 7 respectively roll the clockwise end and the counterclockwise end of the circular arc transition strip 3.2. The lower surface of the lifting pressure plate 14 is an arc surface that conforms to the outer contour of the circular arc transition strip 3.2. When the lifting pressure plate 14 descends, the lower surface of the lifting pressure plate 14 is attached to the upper arc surface of the middle section of the circular arc transition strip 3.2. The lifting pressure plate 14 has a vertically penetrating waist-shaped punch entrance 17. When the punch 18 performs a downward punching action, it passes through the punch entrance 17. The rotating ring 4 has a number of hollowed-out waist-shaped punch holes 2 distributed in a circular array. The rotation of the rotating ring 4 causes the number of waist-shaped punch holes 2 to overlap and connect with the punch entrance 17 on the upper lifting pressure plate 14.

[0034] The waist-shaped punch 2 that coincides with the punch inlet 17 is designated as waist-shaped punch 2.1 (a). The waist-shaped punch 2 adjacent to waist-shaped punch 2.1 in the counterclockwise direction of the rotating ring 4 is designated as waist-shaped punch 2.2 (b). On the arc transition zone 3.2, the hollow hole 1 that coincides with waist-shaped punch 2.1 (a) is designated as hollow hole 1.1 (a), and the hollow hole 1 that coincides with waist-shaped punch 2.2 (b) is designated as hollow hole 1.2 (b).

[0035] A central rotating shaft 23 is coaxially arranged at the axis of the rotating ring 4. One end of the outer wall of the central rotating shaft 23 is rotatably engaged with the bearing hole at the axis of the fixed disk 13 through the second bearing 12. An electric telescopic device 21 extending radially along the rotating ring 4 is fixedly installed on the central rotating shaft 23. The telescopic part of the electric telescopic device 21 is a telescopic arm 24 with a waist-shaped cross section. The telescopic arm 24 has the same cross-sectional shape as the punch 18. The upper and lower parts of one side of the fixed disk 13 are respectively fixed with a first limiting post 6 and a second limiting post 10.

[0036] When the electric telescopic device 21 rotates clockwise with the central rotating shaft 23 until the side limit contact with the second limit post 10, the telescopic arm 24 is in a vertical state and the telescopic arm 24 is aligned with the a-shaped punch hole 2.1. The telescopic arm 24 can extend upward to pass through the a-shaped punch hole 2.1.

[0037] When the electric telescopic device 21 rotates counterclockwise with the central rotating shaft 23 to the side limit contact with the first limit post 6, the telescopic arm 24 is in an inclined state and the telescopic arm 24 is aligned with the b-shaped punch hole 2.2. The telescopic arm 24 can extend to pass through the b-shaped punch hole 2.2.

[0038] A waste receiving box 20 is fixedly installed on one side of the central rotating shaft 23. A punched waste receiving interface 19 is provided on the upper side of the waste receiving box 20. When the telescopic arm 24 is aligned with the b-shaped punch hole 2.2, the punched waste receiving interface 19 is exactly below the a-shaped punch hole 2.1.

[0039] A circular arc rack 22 is coaxially fixed on the central rotating shaft 23, and a drive motor 5 is fixedly installed on the fixed plate 13. The output end of the drive motor 5 is connected to a gear 8, which meshes with the circular arc rack 22.

[0040] Working principle: The non-perforated metal strip 3.1 drawn from the unwinding coil is continuously punched at equal intervals along the length direction by the continuous punching device 29, so that the continuous punching device 29 continuously draws out the perforated metal strip 3.3. The perforated metal strip 3.3 drawn from the continuous punching device 29 first crosses the upper side of a pair of transverse support rollers 31 at the top of the first crest support 28, then crosses the lower side of the transverse trough constraint rollers 33 on the trough support 27, then crosses the upper side of a pair of transverse support rollers 31 at the top of the second crest support 26, and finally passes between the two tail guide rollers 30 and is wound into the take-up coil, so that the perforated metal strip 3.3 has a wave-like undulating shape, and the perforated holes 1 on the perforated metal strip 3.3 are distributed in an equal array along the length direction.

[0041] The winding rate of the take-up coil and the continuous punching rate of the continuous punching device 29 can be easily coordinated in general. However, since the winding process of the take-up coil is continuous, while the punching process of the continuous punching device 29 is intermittent, the winding rate of the take-up coil and the punching rate of the continuous punching device 29 cannot be synchronized at any time. The total length of the perforated metal strip 3.3 with a wave-like shape in this solution has an adaptive increase and decrease elasticity within a certain range, so that the perforated metal strip 3.3 with a wave-like shape plays a buffering role and avoids the risk of the perforated metal strip 3.3 breaking.

[0042] The continuous punching device 29 of this scheme operates in a periodic, intermittent, continuous, equidistant punching process. Any work cycle captured during this process includes the following processes S1 to S6, as detailed below. Figure 3 and Figure 4 :

[0043] S1, the telescopic arm 24 is in the state of passing through the b-shaped punch hole 2.2 and the b-shaped hollow hole 1.2, the punching waste receiving interface 19 corresponds to the bottom of the a-shaped punch hole 2.1, the rotating ring 4 and the arc transition zone 3.2 are completely positioned and remain relatively stationary under the constraint of the telescopic arm 24 in the static state, at which time the a-shaped hollow hole 1.1 has not yet been formed;

[0044] S2, the lifting pressure plate 14 descends, so that the lower surface of the lifting pressure plate 14 fits tightly against the upper arc surface of the middle section of the arc transition band 3.2; so that the middle section of the arc transition band 3.2 that has not yet been punched is tightly clamped between the top of the rotating ring 4 and the lifting pressure plate 14; then the punch 18 quickly performs a downward punching action. The punch 18 first passes down through the punching inlet 17 and punches the middle section of the arc transition band 3.2 that has not yet been punched, so that the middle section of the arc transition band 3.2 is punched out with a hollow hole 1.1. Then the punch 18 continues to pass down through the waist-shaped punching hole 2.1, completing the punching process of the hollow hole 1.1. At the same time, the punching waste receiving interface 19 just receives the metal waste sheet punched out from the end of the punch 18;

[0045] S3, the telescopic arm 24 retracts until it separates from the b-shaped punch hole 2.2 and the b-shaped hollow hole 1.2. At this time, although the telescopic arm 24 loses its constraint on the rotating ring 4 and the arc transition zone 3.2, the punch 18 is in the state of passing through the a-shaped hollow hole 1.1 and the a-shaped punch hole 2.1. The rotating ring 4 and the arc transition zone 3.2 are still completely positioned and remain relatively stationary under the constraint of the punch 18 in the stationary state.

[0046] S4, the drive motor 5 drives the arc rack 22, the central rotating shaft 23, and the electric telescopic device 21 to rotate clockwise synchronously through the gear 8 until the side limit of the electric telescopic device 21 contacts the second limit post 10. At this time, the telescopic arm 24 is in a vertical state, and the telescopic arm 24 and the upper punch 18 are on the same extension line. The telescopic arm 24 can extend upward adaptively, so that the upper end of the telescopic arm 24 and the lower end of the punch 18 contact and overlap each other; at this time, the telescopic arm 24 and the punch 18 are combined to form a longitudinal combined rod 91; as Figure 5 As shown.

[0047] S5, as the telescopic arm 24 extends upward, the punch 18 retracts upward simultaneously. As the punch 18 retracts upward and disengages from the a-shaped punch hole 2.1 and the a-hollow hole 1.1, the telescopic arm 24 passes upward through the a-shaped punch hole 2.1 and the a-hollow hole 1.1, thereby achieving the switching between the telescopic arm 24 and the punch 18 while keeping the rotating ring 4 and the arc transition zone 3.2 stationary. Finally, the lifting pressure plate 14 is controlled to rise until it disengages from the arc transition zone 3.2.

[0048] In S6, the drive motor 5 drives the arc rack 22, the central rotating shaft 23 and the electric telescopic device 21 to rotate counterclockwise synchronously through the gear 8. Under the constraint of the telescopic arm 24, the rotating ring 4 and the arc transition band 3.2 rotate counterclockwise synchronously until the side limit of the electric telescopic device 21 contacts the first limit post 6. At this time, the original a waist-shaped punch hole 2.1 and a hollow hole 1.1 become a waist-shaped punch hole 2.2 and a hollow hole 1.2, and the state of "S1" is restored. One punching cycle is completed.

[0049] The process of continuously repeating S1 to S1 achieves a strict equidistant punching process, ensuring that the perforated holes 1 on the perforated metal strip 3.3 are strictly distributed in an equidistant array, thus avoiding uneven punching.

[0050] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A continuous strip punching process system for the production of cable trays, characterized in that: Includes a continuous punching device (29), through which a non-perforated metal strip (3.1) drawn from the unwinding coil is continuously punched at equal intervals along its length, so that the continuous punching device (29) continuously draws out a perforated metal strip (3.3). The continuous punching device (29) includes a rotating ring (4), a lifting pressure plate (14), and a vertical punch (18). There is an arc transition zone (3.2) between the perforated metal strip (3.3) and the non-perforated metal strip (3.1). The arc transition zone (3.2) is arc-shaped and fits the upper half of the outer ring of the rotating ring (4). There is a punching inlet (17) on the lifting pressure plate (14). When the punch (18) performs a downward punching action, it passes through the punching inlet (17). There are several hollow waist-shaped punching holes (2) arranged in a circular array on the rotating ring (4). The rotation of the rotating ring (4) causes the several waist-shaped punching holes (2) to overlap and connect with the punching inlet (17) on the upper lifting pressure plate (14). The continuous punching device (29) also includes a fixed plate (13), a punch drive device (15), a first rolling roller (11), and a second rolling roller (7); the inner edge of the rotating ring (4) is coaxially rotated with the outer ring of the fixed plate (13) through a first bearing (71); the first rolling roller (11) and the second rolling roller (7) respectively roll the clockwise end and the counterclockwise end of the arc transition strip (3.2); A central rotating shaft (23) is coaxially arranged at the center of the rotating ring (4). One end of the outer wall of the central rotating shaft (23) is rotatably engaged with the bearing hole at the center of the fixed disk (13) through the second bearing (12). An electric telescopic device (21) extending radially along the rotating ring (4) is fixedly installed on the central rotating shaft (23). The telescopic part of the electric telescopic device (21) is a telescopic arm (24). The waist-shaped punch hole (2) that coincides with the punching inlet (17) is denoted as waist-shaped punch hole (2.1), and the waist-shaped punch hole (2) that is adjacent to waist-shaped punch hole (2.1) along the counterclockwise direction of the rotating ring (4) is denoted as waist-shaped punch hole (2.2); on the arc transition zone (3.2), the hollow hole (1) that coincides with waist-shaped punch hole (2.1) is denoted as hollow hole (1.1), and the hollow hole (1) that coincides with waist-shaped punch hole (2.2) is denoted as hollow hole (1.2). The upper and lower parts of one side of the fixed plate (13) are respectively fixed with a first limiting post (6) and a second limiting post (10). When the electric telescopic device (21) rotates clockwise with the central shaft (23) until the side limit contacts the second limit post (10), the telescopic arm (24) is in a vertical state and the telescopic arm (24) is aligned with the a-shaped punch hole (2.1). The telescopic arm (24) can extend upward to pass through the a-shaped punch hole (2.1). When the electric telescopic device (21) rotates counterclockwise with the central shaft (23) until the side limit contacts the first limit post (6), the telescopic arm (24) is in an inclined state and the telescopic arm (24) is aligned with the b-shaped punch hole (2.2). The telescopic arm (24) can extend to pass through the b-shaped punch hole (2.2). A waste receiving box (20) is fixedly installed on one side of the central rotating shaft (23), and a punched waste receiving interface (19) is provided on the upper side of the waste receiving box (20); when the telescopic arm (24) is aligned with the b-shaped punch hole (2.2), the punched waste receiving interface (19) is exactly below the a-shaped punch hole (2.1).

2. The continuous strip punching process system for producing cable trays according to claim 1, characterized in that: The lower surface of the lifting pressure plate (14) is an arc surface that conforms to the outer contour of the arc transition zone (3.2). The descent of the lifting pressure plate (14) causes the lower surface of the lifting pressure plate (14) to fit against the upper arc surface of the middle section of the arc transition zone (3.2).

3. The continuous strip punching process system for producing cable trays according to claim 1, characterized in that: A circular arc rack (22) is coaxially fixed on the central rotating shaft (23), and a drive motor (5) is fixedly installed on the fixed disk (13). The output end of the drive motor (5) is connected to a gear (8), and the gear (8) meshes with the circular arc rack (22).

4. The continuous strip punching process system for producing cable trays according to claim 3, characterized in that: It also includes a take-up roll, a first crest support (28), a trough support (27), a second crest support (26), and a pair of tail guide rollers (30) distributed vertically. The top of the first crest bracket (28) and the second crest bracket (26) are provided with a pair of transverse support rollers (31) and a pair of longitudinal anti-deviation rollers (32). The trough bracket (27) is provided with a transverse trough constraint roller (33) at a position lower than the top of the first crest bracket (28) and the second crest bracket (26). The perforated metal strip (3.3) drawn from the continuous punching device (29) first crosses the upper side of a pair of transverse support rollers (31) at the top of the first crest support (28), then crosses the lower side of the transverse trough constraint rollers (33) on the trough support (27), then crosses the upper side of a pair of transverse support rollers (31) at the top of the second crest support (26), and finally passes between the two tail guide rollers (30) and is wound into the take-up roll, so that the perforated metal strip (3.3) is in a wave-like shape.

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