A buffer device and buffer method for a bar steel dropping machine

Abstract

The present invention relates to a buffer device for a bar steel dropping machine and a buffer method thereof, and belongs to the technical field of small bar steel rolling finishing in the metallurgical industry. The technical solution is: a pair of retaining fingers are arranged in a U-shaped collecting trough (26) and located at the upper part of the U-shaped collecting trough (26): a left retaining finger (6) and a right retaining finger (7), wherein the left retaining finger (6) and the right retaining finger (7) are long strips, and one end of the left retaining finger (6) and the right retaining finger (7) are respectively rotatably connected to the two corresponding side walls of the U-shaped collecting trough (26), and the other end of the left retaining finger (6) and the right retaining finger (7) are respectively connected to the piston rod of the retaining finger driving cylinder (9). The beneficial effects of the present invention are: reducing the drop of the bar, and preventing the bar from bending excessively, bumping and scratching due to the crossing and winding of the bar during the collection process.

Description

Technical Field

[0001] The invention relates to a buffer device of a bar steel dropping machine and a buffer method thereof, belonging to the technical field of small bar steel rolling finishing in the metallurgical industry. Background Art

[0002] The steel dropper is a device used by small bar rolling mills to collect the fixed-length bars after the bars are cut by fixed-length shears. According to the corresponding weight, a certain number of bars are collected and bundled into one piece after calculation, which is convenient for storage and transportation.

[0003] See attached Figure 1 The existing steel drop machine mainly includes a transmission shaft, a transmission gear, a support arm, a chain, a transmission belt, a transmission motor and a passive sprocket. The transmission motor is connected to the transmission gear through a transmission belt. The transmission gear is located on the upper side of the U-shaped collecting trough, and the passive sprocket is located on the lower side of the U-shaped collecting trough. The transmission gear and the passive sprocket are connected through chain transmission. The length of the support arm matches the width of the U-shaped collecting trough, and one end of the support arm is fixed on the chain. After the bar is transported to the end by the chain conveyor, it directly falls on the support arm, and then falls on the conveyor roller at the bottom of the collecting trough. This type of steel drop machine has the following main problems:

[0004] (1) The drop is large. The bars are not parallel due to impact before and during the falling process, that is, the bars are crossed and entangled. The smaller the diameter, the more obvious it is. If the bars are entangled during packaging, the curvature of the bars will increase, the product quality cannot be guaranteed, and the use of downstream high-end customers will be affected;

[0005] (2) The bundles fall into the same position for a long time, resulting in poor and uneven bundle shape. The bundles cannot be evenly divided into two positions on the cross section, which affects the packaging quality and the company's product image.

[0006] (3) The vertical drop is large. When the bars fall, they are easily bumped or scratched against each other or against the support arm of the steel dropper, which affects the surface quality of the product. However, small-sized bars often have very high requirements for product surface quality. Otherwise, it will have a great impact on the quality and life of the products processed by downstream customers.

[0007] (4) The vertical drop is large, which has a great impact on the equipment. Especially when the specifications are large and there is no buffer mechanism, it is easy to affect the life of the transmission mechanism of the steel drop machine and the support arm and other components. Summary of the invention

[0008] The purpose of the present invention is to provide a buffer device for a bar dropping machine and a buffer method thereof, so as to reduce the drop of the bars and prevent the bars from being bent excessively or damaged by bumps due to crossing and winding of the bars during the collection process, thereby solving the problems existing in the background technology.

[0009] The technical solution of the present invention is:

[0010] A buffer device for a bar dropping machine comprises a vertical steel dropping machine, a conveying roller, a collecting trough and a chain conveyor. The end of the chain conveyor is provided with a plurality of collecting troughs arranged side by side and a vertical steel dropping machine matched with each collecting trough. The collecting trough is U-shaped, and a conveying roller is provided at the bottom of the U-shaped collecting trough. The vertical steel dropping machine comprises a transmission shaft, a transmission gear, a supporting arm, a chain, a transmission belt, a transmission motor and a passive sprocket. The transmission motor is driven and connected to the transmission gear through a transmission belt. The transmission gear is located on the upper side of the U-shaped collecting trough, and the passive sprocket is located on the lower side of the U-shaped collecting trough. The transmission gear and the passive sprocket are connected through chain transmission. The length of the supporting arm matches the trough width of the U-shaped collecting trough. One end of the supporting arm is fixed on the chain. A pair of retaining fingers are provided in the U-shaped collecting trough and at the upper part of the U-shaped collecting trough: a left retaining finger and a right retaining finger. The left retaining finger and the right retaining finger are long strips, and one end of the left retaining finger and the right retaining finger are respectively rotatably connected to the two side walls corresponding to the U-shaped collecting trough, and the other end of the left retaining finger and the right retaining finger are respectively connected to the piston rod of the retaining finger driving cylinder.

[0011] The lengths of the left holding fingers and the right holding fingers in the bar buffer device match the width of the U-shaped collecting groove.

[0012] The lengths of the left holding fingers and the right holding fingers in the bar buffer device are smaller than the width of the U-shaped collecting groove and larger than half of the width of the U-shaped collecting groove.

[0013] The left holding finger and the right holding finger in the bar buffer device are close to the unloading position at the end of the chain conveyor.

[0014] A bar dropping machine buffering method adopts a bar dropping machine buffering device defined above. When the bar is transported to the end through a chain conveyor, the left holding finger and the right holding finger are in a horizontal state, i.e., a closed state, under the action of a holding finger driving cylinder. Then the bar falls onto the left holding finger and the right holding finger. When the supporting arm on the chain rotates to the bottom of the left holding finger and the right holding finger, under the action of the holding finger driving cylinder, the left holding finger and the right holding finger gradually open and slowly place the bar onto the supporting arm. The supporting arm places the bar onto the conveying roller with the transmission of the chain and transports it to a designated location for bundling and packaging.

[0015] The beneficial effects of the present invention are: reducing the drop of the bars, preventing the bars from being bent excessively, being bumped and damaged due to crossing and winding of the bars during the collection process, meeting the requirements of internal control standards for packaging, effectively improving work efficiency, avoiding the breaking, sorting and re-bundling of problematic bars, shortening delivery time and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the main view of the background technology;

[0017] Figure 2 It is the front view of the present invention;

[0018] Figure 3 It is a left side view of the present invention;

[0019] Figure 4 is a top view of the present invention;

[0020] Figure 5 This is a front view of the vertical steel dropping machine including the retaining finger of the present invention;

[0021] Figure 6 It is a left view of a single-group enlarged view of the vertical steel dropping machine of the present invention;

[0022] Figure 7 It is a top view of a single group of the vertical steel dropping machine of the present invention;

[0023] Figure 8 It is a front view of the retaining finger of the present invention;

[0024] Fig. 9 It is a left view of the retaining finger of the present invention;

[0025] Fig.10 is a top view of the retaining finger of the present invention;

[0026] Fig.11 It is a schematic diagram of the left holding finger high position state of the present invention;

[0027] Fig.12 It is a schematic diagram of the left holding finger in the low position state of the present invention;

[0028] Fig.13 It is a top view of a single group of the vertical steel dropping machine including the retaining fingers of the present invention;

[0029] In the figure: vertical steel drop machine 1, transmission shaft 2, transmission gear 3, support arm 4, chain 5, left holding finger 6, right holding finger 7, cylinder base fixed end 8, holding finger driving cylinder 9, cylinder piston rod 10, piston rod holding finger connecting shaft 11, holding finger fixed shaft 12, transmission belt 17, transmission wheel 18, transmission motor 19, motor base 20, roller motor 21, steel drop machine base 22, conveyor roller bearing seat 23, conveyor roller 24, bundled bars 25, collecting trough 26, detection grating 27, bars to be collected 28, support arm fixing pin 29, wheel 30, U-shaped groove guide 31, chain conveyor 34. DETAILED DESCRIPTION

[0030] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0031] See attached Figure 2-13A bar steel dropping machine buffer device comprises a vertical steel dropping machine 1, a conveying roller 24, a collecting trough 26 and a chain conveyor 34. The end of the chain conveyor 34 is provided with a plurality of collecting troughs 26 arranged side by side and a vertical steel dropping machine 1 matched with each collecting trough 26. The collecting trough 26 is U-shaped, and a conveying roller 24 is provided at the bottom of the U-shaped collecting trough 26. The vertical steel dropping machine 1 comprises a transmission shaft 2, a transmission gear 3, a supporting arm 4, a chain 5, a transmission belt 17, a transmission motor 19 and a passive sprocket. The transmission motor 19 is driven and connected to the transmission gear 3 through the transmission belt 17. The transmission gear 3 is located on the upper side of the U-shaped collecting trough 26. The sprocket is located at the lower side of the U-shaped collecting trough 26, the transmission gear 3 and the driven sprocket are connected by the chain 5, the length of the supporting arm 4 matches the width of the U-shaped collecting trough 26, one end of the supporting arm 4 is fixed on the chain 5, and a pair of retaining fingers are arranged in the U-shaped collecting trough 26 and at the upper part of the U-shaped collecting trough 26: a left retaining finger 6 and a right retaining finger 7, the left retaining finger 6 and the right retaining finger 7 are long strips, one end of the left retaining finger 6 and the right retaining finger 7 are respectively rotatably connected to the two corresponding side walls of the U-shaped collecting trough 26, and the other ends of the left retaining finger 6 and the right retaining finger 7 are respectively connected to the piston rod of the retaining finger driving cylinder 9.

[0032] In this embodiment, refer to the attached Figure 2-13 There are 12 vertical steel droppers 1 (including 12 U-shaped collecting troughs 26), the distance between two adjacent ones is about 1.25 meters, and the total length is about 14 meters. The distance between two adjacent ones and the total length can be adjusted accordingly according to the specifications and length of the products to adapt to the corresponding products. Every six steel droppers 1 form a group, each of which is powered by a transmission motor through a belt, and there are two motors in total.

[0033] The steel drop machine transmission system is installed on the upper side of the collecting tank 26, connected by four transmission shafts through a rigid coupling, and driven by a motor. A passive sprocket is installed on the lower side of each collecting tank 26, and the steel drop machine chain is driven to do periodic motion through the transmission sprocket.

[0034] Three supporting arms 4 are symmetrically mounted on the chain 5 of each steel dropper. The roots of the supporting arms 4 are fixed to the chain links through pins. A wheel is mounted on both sides of the pin, and the wheel is guided by the U-shaped groove of the column to play a guiding and stabilizing role.

[0035] A pair of retaining fingers, i.e., a left retaining finger 6 and a right retaining finger 7, are installed on the side wall of each U-shaped collecting groove 26. The retaining fingers are driven by a cylinder. The length of the left retaining finger 6 and the right retaining finger 7 is less than the groove width of the U-shaped collecting groove 26, and is greater than half of the groove width of the U-shaped collecting groove 26.

[0036] All holding fingers are divided into two groups in the longitudinal direction (length direction), with six pairs in each group. Each group can act independently or two groups can be interlocked and act synchronously. For steel products of different lengths, if the product length is about 6 meters, only one group of holding fingers needs to act accordingly, and the other group does not need to act, that is, it is in a stopped state; if the length of the product is about 12 meters, two groups of holding fingers need to be interlocked, and all holding fingers act simultaneously and consistently. The specific control is flexibly operated according to the production situation.

[0037] The steel drop machine 1 is driven by the transmission shaft 2 to rotate the transmission gear 3, and the transmission gear 3 then drives the chain 5 on it to move, and the chain 5 drives the supporting arm 4 with one end fixed on it to move. The fixed end at the root of the supporting arm 4 is processed into a shape similar to the shape of an outer link in the chain 5, and is put on a link from the outside. Two circular holes are arranged as connection points, and the root of the supporting arm 4 is fixed to the chain 5 by two anchor bolts. The fixation is firm and reliable, and the supporting arm 4 is driven by the chain 5 to move together. When the supporting arm 4 moves with the chain 5 to the steel supporting working position of the steel drop machine collecting trough 26, a special supporting arm position detection grating detects the corresponding position signal, controls the transmission shaft 2 to stop moving, and ensures that the supporting arm 4 stops at the corresponding collection and supporting steel working position.

[0038] When a layer of bars cut by the fixed-length shear of the small-size bar rolling line is transported to the end through the chain conveyor 34, the movable ends of the left holding finger 6 and the right holding finger 7 are both in a high position (i.e., closed state), and the detection proximity switch on the chain conveyor detects that steel has passed, and then delays for 3 seconds (the time is adjustable) and the bars fall onto the left holding finger 6 and the right holding finger 7, and are temporarily supported by the two holding fingers. Then, the left holding finger 6 is opened first (the holding finger cylinder 9 acts at the same time, the piston rod 10 is retracted, and the right holding finger 7 falls to a low position), and the layer of bars is placed on the supporting arm 4 of the steel dropper, so that its landing point is located slightly to the left of the middle of the collecting tank 26, and then delays for 3 seconds (the time is adjustable). The finger holding cylinder 9 is activated again to lift all the left holding fingers 6 to a high position at the same time, that is, the holding fingers are in a closed state, and the second layer of bars on the chain conveyor comes over, and the proximity switch is detected to detect that there is steel coming, and then the bars fall onto the two holding fingers after a delay of 3 seconds (the time is adjustable), and then the right holding fingers 7 are opened at the same time (the cylinder 9 is activated at the same time, the piston rod 10 is retracted, and the right holding fingers 7 are dropped to a low position), and this layer of bars is placed on the supporting arm 4 of the steel dropper, so that its landing point is located a little to the right of the middle of the collecting tank 26, and then the finger holding cylinder 9 is activated again after a delay of 3 seconds (the time is adjustable), and the right holding fingers 7 are lifted to a high position at the same time, that is, the two holding fingers are in a closed (supporting steel) state. The two holding fingers open and put down the bars alternately, which not only makes them more parallel through the buffering of the two holding fingers, reduces the drop difference, better prevents the bars from crossing and winding, and reduces bumps and scratches, but also divides the bars into two steel drop points in the cross-sectional width direction of the steel drop machine collection trough, which is equivalent to subdividing them into two small areas, and alternately lays and collects them, making the bars, especially small-sized bars, more uniform and smooth on the entire cross-sectional surface of the collection trough. When the third layer of bars comes to collect, the action is repeated periodically according to the law of the first action.

[0039] After a certain number of batches of bars are buffered and smoothly dropped onto the supporting arm of the steel dropper, the transmission motor 19 on the motor base 20 drives the transmission wheel 18 to drive the transmission belt 17 to drive the vertical steel dropper chain 5 on the steel dropper base 22 to rotate, thereby driving the supporting arm 4 to move downward until the bundled bars (bars) 25 connected to the supporting arm are slowly placed on the conveyor roller 24, and then the roller motor 21 drives the conveyor roller 24 tightly fixed by the conveyor roller bearing seat 23 to slowly open the bars above, and after opening (moving) to the baling station, the baler will bundle and package the bundled bars (bars) 25 in a bulk state.

Claims

1. A bar steel dropping machine buffer device, comprising a vertical steel dropping machine (1), a conveying roller (24), a collecting trough (26) and a chain conveyor (34), wherein a plurality of collecting troughs (26) arranged side by side and a vertical steel dropping machine (1) matched with each collecting trough (26) are provided at the end of the chain conveyor (34), wherein the collecting trough (26) is U-shaped, and a conveying roller (24) is provided at the bottom of the U-shaped collecting trough (26), wherein the vertical steel dropping machine (1) comprises a transmission shaft (2), a transmission gear (3), a supporting arm (4), a chain conveyor (34), and a plurality of collecting troughs (26) arranged side by side and a vertical steel dropping machine (1) matched with each collecting trough (26). The invention relates to a material support arm (4), a transmission belt (17), a transmission motor (19) and a driven sprocket, wherein the transmission motor (19) is connected to the transmission gear (3) through the transmission belt (17), the transmission gear (3) is located on the upper side of the U-shaped collecting trough (26), the driven sprocket is located on the lower side of the U-shaped collecting trough (26), the transmission gear (3) and the driven sprocket are connected through the chain (5), the length of the support arm (4) matches the width of the U-shaped collecting trough (26), and one end of the support arm (4) is fixed on the chain (5), characterized in that: A pair of retaining fingers are arranged in the U-shaped collecting groove (26) and at the upper part of the U-shaped collecting groove (26): a left retaining finger (6) and a right retaining finger (7), wherein the left retaining finger (6) and the right retaining finger (7) are in the shape of long strips, one end of the left retaining finger (6) and the right retaining finger (7) are respectively rotatably connected to two corresponding side walls of the U-shaped collecting groove (26), and the other end of the left retaining finger (6) and the right retaining finger (7) are respectively connected to the piston rod of the retaining finger driving cylinder (9); The lengths of the left retaining finger (6) and the right retaining finger (7) match the width of the U-shaped collecting groove (26); The length of the left retaining finger (6) and the right retaining finger (7) is less than the width of the U-shaped collecting groove (26) and greater than half the width of the U-shaped collecting groove (26); The left retaining finger (6) and the right retaining finger (7) are located close to the unloading position at the end of the chain conveyor (34).

2. A bar steel dropping machine buffering method, characterized in that: A bar dropping machine buffer device as defined in claim 1 is used. When the bar is transported to the end through a chain conveyor (34), the left holding finger (6) and the right holding finger (7) are in a horizontal state, i.e., a closed state, under the action of the holding finger driving cylinder (9). Then, the bar falls onto the left holding finger (6) and the right holding finger (7). When the supporting arm (4) on the chain (5) rotates to the bottom of the left holding finger (6) and the right holding finger (7), under the action of the holding finger driving cylinder (9), the left holding finger (6) and the right holding finger (7) gradually open and slowly place the bar onto the supporting arm (4). The supporting arm (4) places the bar onto the conveying roller (24) driven by the chain (5) and transports it to a designated location for bundling and packaging.

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