Methods for improving production efficiency of discontinuous production lines

Abstract

The present invention discloses a belt tail lifting device, which is applied to the No. 7 rewinding unit. The present invention also discloses a method for improving production efficiency of a discontinuous production line, including: lifting the belt tail of the previous steel coil of the raw material coil by the above-mentioned belt tail lifting device, passing the belt head of the raw material coil under the belt tail of the previous steel coil, and after the belt passing is completed, speeding up the production of the production line; when the raw material coil runs to the belt head shearing position, the belt head of the raw material coil is sheared; the raw material coil after the belt head is sheared is coiled, and when the qualified finished product is coiled, the belt tail is stopped and cut; the cut belt tail runs to the inspection table area in front of the steering roller, waiting for the next steel coil belt head. The embodiment of the present invention solves the technical problems of many times of loading and unloading and long time consumption in the prior art by providing a belt tail lifting device and a method for improving production efficiency of a discontinuous production line, reduces the production operation process, improves production efficiency, and reduces production costs.

Description

Technical Field

[0001] The invention relates to the technical field of steel rolling, and in particular to a method for improving production efficiency of a discontinuous production line. Background Art

[0002] The No. 7 rewinding unit is a non-continuous production line, and its main work is to cut off the head and tail of the strip or remove defects and split the strip. Its raw materials mainly come from the offline leveler, which is a rolling mill, so the head and tail of the product are unleveled parts, which must be cut off before sales.

[0003] However, the No. 7 rewinding line is a non-continuous production line, and the head and tail of the strip cannot be connected. Each head and tail of the strip generates a waste roll, which is then unloaded and packaged. Because the strip is thin, each roll needs to consume a paper sleeve. The number of times of loading and unloading is high, and the time of loading and unloading is relatively long, which affects the effective production time. Summary of the invention

[0004] The embodiments of the present invention provide a tail lifting device and a method for improving production efficiency of a discontinuous production line, thereby solving the technical problems of frequent coil loading and unloading and long time consumption in the prior art, reducing the production operation process, improving production efficiency and reducing production costs.

[0005] In one aspect of an embodiment of the present invention, a belt tail lifting device is provided, which is applied to a No. 7 rewinding unit, comprising:

[0006] A permanent magnet, which is used to attract the belt tail;

[0007] A frame, wherein the permanent magnet is arranged at the bottom of the frame;

[0008] The lifting mechanism has two groups and is arranged at two ends of the bottom of the frame. The lifting mechanism is used to drive the frame to move up and down.

[0009] Furthermore, the lifting mechanism comprises:

[0010] A guide rail, the guide rail being arranged at the bottom of the frame;

[0011] A lifting cylinder, the lifting cylinder is arranged at the bottom of the frame, and the lifting cylinder is used to drive the guide rail to move up and down;

[0012] The guide rail fixing frame is arranged on the outside of the guide rail and is used to limit the movable track of the guide rail and the stability of its operation.

[0013] Furthermore, the number of the permanent magnets is greater than or equal to 5 and are evenly distributed at the bottom of the frame.

[0014] Another aspect of the present invention provides a method for improving production efficiency of a discontinuous production line, comprising:

[0015] The tail of the steel coil preceding the raw material coil is lifted by the tail lifting device, and the head of the raw material coil is passed under the tail of the preceding steel coil. After the passing of the tape is completed, the production line is accelerated;

[0016] When the raw material roll runs to the tape head shearing position, the tape head of the raw material roll is sheared;

[0017] The raw material roll after cutting the strip head is wound up, and when the roll is wound up to a qualified finished product, the machine is stopped and cut;

[0018] The slit tail of the strip is run to the inspection table area in front of the turning roller, waiting for the head of the next steel coil.

[0019] Furthermore, the tail of the steel coil before the raw material coil is lifted by the tail lifting device, and the head of the raw material coil is passed under the tail of the previous steel coil. After the passing of the tape is completed, the production line speed-up production includes:

[0020] The roll-up trolley at the entrance goes to the material storage area to pick up the raw material roll;

[0021] The entrance roll-up trolley measures the width and height, and after the height is aligned, the raw material roll is transported to the unwinding mandrel, the entrance outer support is lifted and supported on the end of the unwinding mandrel, and the unwinding mandrel expands to fix the raw material roll;

[0022] The entrance guide plate platform is lifted, the unwinding machine drives the unwinding mandrel to rotate, and the raw material coil head is guided to the entrance pinch roller by the tape threading guide plate;

[0023] The tail of the steel coil preceding the raw material coil is lifted by the tail lifting device, and the head of the raw material coil is passed under the tail of the preceding steel coil;

[0024] The No. 7 rewinder unit threads the strip to the coiler;

[0025] After the belt is threaded, the entrance guide table and the exit guide table automatically descend, and the production line speeds up production.

[0026] Further, when the raw material roll runs to the tape head shearing position, shearing the tape head of the raw material roll includes:

[0027] When the raw material roll runs to the slitting position, the machine stops and the tape head of the raw material roll is sheared;

[0028] The exit unloading trolley unloads the coiled waste strip head from the coiling mandrel and then lifts it through the overhead crane.

[0029] Further, the raw material roll after the strip head is cut is wound up, and when the qualified finished product is wound up, the cutting is stopped and includes:

[0030] After the overhead crane lifts, the outlet unloading trolley takes the first sleeve;

[0031] The outlet unloading trolley transports the first sleeve to the winding mandrel, the outer support is lifted and supported on the end of the winding mandrel, and the winding mandrel expands to fix the first sleeve;

[0032] The exit winding machine moves forward to the working position, holds the forearm tightly, and enters the working state;

[0033] The No. 7 rewinder unit threads the strip to the coiler;

[0034] After the tape is threaded, the exit winding device automatically withdraws, the entrance guide table and the exit guide table automatically descend, and the production line speeds up production;

[0035] After the qualified finished product is coiled, the car is stopped and cut;

[0036] The outlet unloading trolley unloads the qualified finished products from the coiling mandrel, transports them to the packaging position for packaging and weighing, and then transports them to the walking beam saddle of the packaging unit.

[0037] Furthermore, the slit tail is run to the inspection table area in front of the turning roller, waiting for the next coil head to include:

[0038] The outlet unloading trolley transports the second sleeve to the winding mandrel, the outlet outer support is lifted and supported on the end of the winding mandrel, and the winding mandrel expands to fix the second sleeve;

[0039] The exit winding aid moves forward to the working position, holds the forearm tightly, and enters the working state;

[0040] The No. 7 rewinder unit threads the strip to the coiler;

[0041] After the tape is threaded, the exit winding device automatically withdraws, the entrance guide table and the exit guide table automatically descend, and the production line speeds up production;

[0042] The tail of the raw material coil runs to the inspection table area in front of the turning roller, and the coiler presses the upper pressing roller, lifts the exit guide plate table, and waits for the head of the next steel coil.

[0043] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0044] By adopting the tail lifting device, the head of the raw material coil and the tail of the previous steel coil can be continuously wound up, which reduces the production operation process, improves production efficiency and reduces the cost of using paper sleeves. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic structural diagram of a belt tail lifting device in Embodiment 1 of the present invention;

[0046] Figure 2 This is a flowchart of a method for improving production efficiency of a discontinuous production line in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0047] The existing No. 7 rewinding unit produces a waste roll for each belt head and tail during winding, and each roll consumes a paper sleeve. The number of times of loading and unloading the rolls is relatively large, and the time for loading and unloading the rolls is relatively long, which affects the effective production time. In order to reduce the production operation process, improve production efficiency, and reduce the cost of using paper sleeves, the present application provides a belt tail lifting device and a method for improving production efficiency of a discontinuous production line.

[0048] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0049] Embodiment 1

[0050] like Figure 1 As shown, an embodiment of the present application provides a belt tail lifting device, which is applied to the No. 7 rewinding unit, including: a permanent magnet 1, a frame 2 and a lifting mechanism, wherein the permanent magnet is used to attract the belt tail; the permanent magnet is arranged at the bottom of the frame; the lifting mechanism has two groups and is arranged at both ends of the bottom of the frame, and the lifting mechanism is used to drive the frame to move up and down.

[0051] The lifting mechanism includes: a guide rail 3, a lifting cylinder 4 and a guide rail fixing frame 5, wherein the guide rail is arranged at the bottom of the frame; the lifting cylinder is arranged at the bottom of the frame, and the lifting cylinder is used to drive the guide rail to move up and down; the guide rail fixing frame is arranged outside the guide rail, and is used to limit the moving track of the guide rail and the stability of the operation. The number of the permanent magnets is greater than or equal to 5, and is evenly distributed at the bottom of the frame.

[0052] When the tail lifting device of the present application is in use, the lifting cylinder drives the frame down, the permanent magnet attracts the tail of the previous steel coil, and the lifting cylinder drives the frame up, so that the tail of the coil forms an angle with the horizontal line of the No. 7 rewinding unit to facilitate the insertion of the head of the raw material coil.

[0053] Embodiment 2

[0054] like Figure 2 As shown, the embodiment of the present application also provides a method for improving production efficiency of a discontinuous production line, comprising:

[0055] Step S1: lift the tail of the previous steel coil of the raw material coil by the tail lifting device, and pass the head of the raw material coil under the tail of the previous steel coil. After the passing, the production line speeds up production;

[0056] Step S2: When the raw material roll runs to the tape head shearing position, the tape head of the raw material roll is sheared;

[0057] Step S3: winding the raw material roll after cutting the tape head, and stopping the machine for cutting when the roll is a qualified finished product;

[0058] Step S4: Run the slit tail to the inspection table area in front of the steering roller to wait for the next steel coil head.

[0059] Among them, step S1: lift the tail of the previous steel coil of the raw material coil by the tail lifting device, and pass the head of the raw material coil under the tail of the previous steel coil. After the strip passing is completed, the production line speed-up production includes:

[0060] Step S11: The entrance roll-up trolley goes to the material storage area to pick up the raw material roll;

[0061] Step S12: the inlet roll-up trolley measures the width and height, and after height alignment, the raw material roll is transported to the unwinding mandrel, the inlet outer support is lifted and supported on the end of the unwinding mandrel, and the unwinding mandrel expands to fix the raw material roll;

[0062] Step S13: the inlet guide plate platform is lifted, the unwinding machine drives the unwinding mandrel to rotate, and the raw material coil head is guided to the inlet pinch roller by the tape threading guide plate;

[0063] Step S14: lifting the tail of the previous steel coil of the raw material coil by means of the tail lifting device, and passing the head of the raw material coil under the tail of the previous steel coil;

[0064] Step S15: The main operator in the main operation room performs the tape threading procedure, and the unit threads the tape to the coiler;

[0065] Step S16: After the belt threading is completed, the inlet guide plate platform and the outlet guide plate platform automatically descend, and the production line speeds up production.

[0066] In step S2, when the raw material roll runs to the tape head shearing position, shearing the tape head of the raw material roll includes:

[0067] Step S21: when the raw material roll runs to the cutting position, the machine stops and cuts the tape head of the raw material roll;

[0068] Step S22: The outlet unloading trolley unloads the wound waste strip head from the winding mandrel and then lifts it through an overhead crane.

[0069] Step S3 is to coil the raw material roll after cutting the tape head, and when the raw material roll is coiled to a qualified finished product, the cutting is stopped and includes:

[0070] Step S31: After the overhead crane lifts, the outlet unloading trolley takes the first sleeve;

[0071] Step S32: the outlet unloading trolley transports the first sleeve to the winding mandrel, the outer support is lifted and supported on the end of the winding mandrel, and the winding mandrel expands to fix the first sleeve;

[0072] Step S33: the exit winding aid moves forward to the working position, holds the forearm tightly, and enters the working state;

[0073] Step S34: The main operator in the main operation room performs the tape threading procedure, and the No. 7 rewinding unit threads the tape to the coiler;

[0074] Step S35: After the tape is threaded, the exit winding device automatically withdraws, the entrance guide table and the exit guide table automatically descend, and the production line speeds up production;

[0075] Step S36: After the qualified finished product is coiled, the machine stops and cuts;

[0076] Step S37: The outlet unloading trolley unloads the qualified finished product from the winding mandrel, transports it to the packaging position for packaging and weighing, and then transports it to the walking beam saddle of the packaging unit.

[0077] Step S4 runs the slit tail to the inspection table area in front of the steering roller, waiting for the next coil head, including:

[0078] Step S41: the outlet unloading trolley transports the second sleeve to the winding mandrel, the outer support is lifted and supported on the end of the winding mandrel, and the winding mandrel expands to fix the second sleeve.

[0079] Step S42: the exit winding aid moves forward to the working position, holds the forearm tightly, and enters the working state;

[0080] Step S43: The main operator in the main operation room performs the tape threading procedure, and the No. 7 rewinding unit threads the tape to the coiler;

[0081] Step S44: After the tape threading is completed, the exit winding device automatically withdraws, the entrance guide table and the exit guide table automatically descend, and the production line speeds up production;

[0082] Step S45: the tail of the raw material coil runs to the inspection table area in front of the turning roller, the coiler presses the upper pressing roller, lifts the exit guide table, and waits for the head of the next steel coil.

[0083] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0084] 1. When starting to thread the tape, the tape head of the raw material coil is passed under the tape tail of the previous coil by using the tape tail lifting device, so that the front and rear coils can be coiled continuously, without the need to use sleeves to coil the tape head and tape tail separately to produce two waste coils, reducing the number of times a sleeve is wound up and unwound, which can save about 6 minutes of process time, and also reduces the use of a sleeve, reduces the production operation process, improves production efficiency, and reduces production costs.

[0085] 2. Due to the addition of the tail lifting device, the tail of the raw material coil is cut and coiled together with the head of the next steel coil, and then the waste coil is lifted away. After the qualified finished product is completed, the raw material coil is produced in the original process, and the tail is coiled onto the mandrel. The export trolley unloads the coiled waste tail from the mandrel, and waits for the overhead crane to lift it after unloading. This operation can be deleted, which can save at least 6 minutes of process time.

[0086] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for improving production efficiency of a discontinuous production line, characterized in that: include: The tail lifting device applied to the No. 7 rewinding unit is used to lift the tail of the previous steel coil of the raw material coil, and the head of the raw material coil is passed under the tail of the previous steel coil. After the threading is completed, the production line speeds up production; When the raw material roll runs to the tape head shearing position, the tape head of the raw material roll is sheared; The raw material roll after cutting the strip head is wound up, and when the roll is wound up to a qualified finished product, the machine is stopped and cut; Run the slit strip tail to the inspection table area in front of the steering roller, waiting for the next roll of steel coil strip head; Among them, the tail of the steel coil before the raw material coil is lifted by the tail lifting device, and the head of the raw material coil is passed under the tail of the previous steel coil. After the passing of the tape is completed, the production line speed-up production includes: The roll-up trolley at the entrance goes to the material storage area to pick up the raw material roll; The entrance roll-up trolley measures the width and height, and after the height is aligned, the raw material roll is transported to the unwinding mandrel, the entrance outer support is lifted and supported on the end of the unwinding mandrel, and the unwinding mandrel expands to fix the raw material roll; The entrance guide plate platform is lifted, the unwinding machine drives the unwinding mandrel to rotate, and the raw material coil head is guided to the entrance pinch roller by the tape threading guide plate; The tail of the steel coil preceding the raw material coil is lifted by the tail lifting device, and the head of the raw material coil is passed under the tail of the preceding steel coil; The No. 7 rewinder unit threads the strip to the coiler; After the belt is threaded, the inlet guide table and the outlet guide table automatically drop down, and the production line speeds up production; The slit tail runs to the inspection table area in front of the turning roller, waiting for the next coil head, including: The exit unloading trolley transports the second sleeve to the winding mandrel, the exit outer support is lifted and supported on the end of the winding mandrel, and the winding mandrel expands to fix the second sleeve; The exit winding machine moves forward to the working position, holds the forearm tightly, and enters the working state; The No. 7 rewinder unit threads the strip to the coiler; After the tape is threaded, the exit winding device automatically withdraws, the entrance guide table and the exit guide table automatically descend, and the production line speeds up production; The tail of the raw material coil runs to the inspection table area in front of the turning roller, and the coiler presses the upper pressing roller, lifts the exit guide plate table, and waits for the head of the next steel coil.

2. The method for improving production efficiency of a discontinuous production line according to claim 1, characterized in that: When the raw material roll runs to the tape head shearing position, shearing the tape head of the raw material roll includes: When the raw material roll runs to the slitting position, the machine stops and the tape head of the raw material roll is sheared; The exit unloading trolley unloads the coiled waste strip head from the coiling mandrel and then lifts it through the overhead crane.

3. The method for improving production efficiency of a discontinuous production line according to claim 2, characterized in that: The raw material roll after cutting the strip head is coiled up, and when the qualified finished product is coiled up, the cutting is stopped and includes: After the overhead crane lifts, the outlet unloading trolley takes the first sleeve; The outlet unloading trolley transports the first sleeve to the winding mandrel, the outer support is lifted and supported on the end of the winding mandrel, and the winding mandrel expands to fix the first sleeve; The exit winding machine moves forward to the working position, holds the forearm tightly, and enters the working state; The No. 7 rewinder unit threads the strip to the coiler; After the tape is threaded, the exit winding device automatically withdraws, the entrance guide table and the exit guide table automatically descend, and the production line speeds up production; After the qualified finished product is coiled, the car is stopped and cut; The outlet unloading trolley unloads the qualified finished products from the coiling mandrel, transports them to the packaging position for packaging and weighing, and then transports them to the walking beam saddle of the packaging unit.

Images