Front and back clamping device of cold saw

Abstract

The utility model belongs to the technical field of equipment in the iron and steel industry, and discloses a front and back clamping device of a cold saw in order to achieve accurate positioning and reliable clamping of profile steel in the cutting process. The clamping device is mounted between front and rear roller ways of a cold saw, and mainly comprises a horizontal clamping system, a longitudinal pressing system, a base, a horizontal hydraulic cylinder, a vertical hydraulic cylinder, a pair of gears, a stepped shaft, a pair of vertical rollers, a roller shaft, a first swing arm, a second swing arm, a rack, a roller seat, a pressing roller and a guide column. And the horizontal clamping system and the longitudinal pressing system are hydraulically driven. The front clamping device and the rear clamping device of the cold saw can clamp profile steel in the horizontal direction and the vertical direction at the same time, the profile steel can be tightly attached to the roller face all the time due to the specific taper design of the roller body of the vertical roller, and therefore reliable positioning and clamping of the profile steel can be achieved in the profile steel cutting process, and the profile steel cutting efficiency and the yield are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of clamping devices before and after cold saw of steel industry BACKGROUND

[0002] In the production process of section steel, in order to cut head, tail and fixed section of section steel, cold saw will be used. When using cold saw to cut section steel, section steel needs to be clamped and fixed. The existing section steel clamping and fixing device only presses down the section steel on the roller in the vertical direction, fixes the section steel longitudinally, and then cuts with cold saw. In the cutting process, the section steel is prone to horizontal deviation, resulting in poor positioning accuracy of section steel, low cutting yield and other problems. SUMMARY

[0003] The utility model solves the technical problem that: in the section steel cutting process, since the fixation of section steel only has pressing down positioning, without horizontal positioning, section steel is prone to deviation in the cutting process, resulting in inaccurate positioning, poor cutting accuracy and low efficiency.

[0004] The technical scheme adopted by the utility model to solve technical problems is: a kind of section steel clamping device before and after cold saw is invented, main components include horizontal clamping system, longitudinal pressing system, base, gear box, a set of clamping device is arranged before and after cold saw, that is, the positioning of the section steel to be cut in vertical direction and horizontal direction can be realized.

[0005] The horizontal clamping system is installed on the base and is used to clamp section steel in horizontal direction. The longitudinal pressing system is installed on the base and is used to press section steel longitudinally. The horizontal clamping system and the longitudinal pressing system are both driven by hydraulic cylinder.

[0006] The horizontal clamping system includes two stepped shafts, a pair of gears, dust cover, swing arm one, swing arm two, a pair of vertical rollers, roller shaft, horizontal hydraulic cylinder, pin shaft and pressing plate.

[0007] The longitudinal pressing system includes rack, vertical hydraulic cylinder, roller seat, pressing roller, guide column and connecting shaft.

[0008] The base is provided with gear box, and the gear box is provided with parallel stepped holes on upper and lower surfaces.

[0009] The two stepped shafts are installed on stepped holes of the gear box through bearings; the pair of gears are installed on the two stepped shafts respectively, and the pair of gears are engaged with each other; two dustproof covers are installed on the two stepped shafts; the swing arm one and the swing arm two are installed on the two stepped shafts respectively and press on the dustproof covers; the pair of vertical rollers are installed on the swing arm one and the swing arm two through two roller shafts respectively; the head of the horizontal hydraulic cylinder is installed on the swing arm one through the pin shaft, and the middle lug of the horizontal hydraulic cylinder is installed on the swing arm two through the pressing plate.

[0010] The vertical roller body is provided with a certain taper, and the vertical roller is large at the top and small at the bottom, so that the vertical roller has a downward force on the two side steels during clamping the steels, and the steels are always close to the roller surface.

[0011] The rack is provided with a circular hole and a strip-shaped hole on each side for installing guide columns, and a circular hole in the middle for installing a vertical hydraulic cylinder.

[0012] The pressing roller is installed on the roller seat; two guide columns are welded on the roller seat, one of which passes through the circular hole of the rack, and the other passes through the strip-shaped hole of the rack; the head of the vertical hydraulic cylinder is connected with the roller seat through the connecting shaft, the flange of the head of the vertical hydraulic cylinder is connected with the rack, and the vertical hydraulic cylinder passes through the circular hole in the middle of the rack.

[0013] The cold saw front and rear clamping device has the following beneficial effects: the cold saw front and rear clamping device can be arranged in front of a cold saw or behind a cold saw, and is used for cutting the head or tail of a steel profile, or a set of the cold saw front and rear clamping device can be arranged in front of a cold saw and behind a cold saw respectively, and is used for cutting the steel profile in sections. The clamping device can clamp the steel profile in the horizontal direction and the vertical direction at the same time, so that the stability of the steel profile during cutting is ensured. The horizontal clamping system is driven by the horizontal hydraulic cylinder to swing the swing arm one and the swing arm two synchronously under the meshing action of the pair of gears, and drives the pair of vertical rollers to open and clamp the steel profile symmetrically and synchronously, so that the function of clamping the steel profile on both sides in the horizontal direction is achieved. The vertical pressing system drives the pressing roller to move up and down under the action of the vertical hydraulic cylinder, so that the function of positioning the steel profile in the vertical direction is achieved. The guide column can limit the swing of the vertical pressing system, so that the effect of stable pressing is achieved. The vertical roller body of the horizontal clamping system is provided with a certain taper, and the vertical roller is large at the top and small at the bottom, so that the vertical roller has a downward force on the two side steels during clamping the steels, and the steels are always close to the roller surface, and the phenomenon of steel stacking does not occur, so that the effect of stable clamping is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a patent axial measurement structure schematic diagram

[0015] Figure 2 is a front view structural schematic diagram of the utility model patent

[0016] Figure 3 is a bottom view structural schematic diagram of the utility model patent

[0017] Figure 4 is a right view structural schematic diagram of the utility model patent

[0018] Figure 5 is a sectional view structural schematic diagram of the utility model patent

[0019] Part number explanation

[0020] 1, base

[0021] 2, horizontal clamping system

[0022] 3, longitudinal press-down system

[0023] 4, stepped shaft

[0024] 5, gear

[0025] 6, dust cover

[0026] 7, shaft sleeve

[0027] 8, bearing

[0028] 9, swing arm one

[0029] 10, swing arm two

[0030] 11, vertical roll

[0031] 12, roll shaft

[0032] 13, horizontal hydraulic cylinder

[0033] 14, pin shaft

[0034] 15, press plate

[0035] 16, vertical hydraulic cylinder

[0036] 17, rack

[0037] 18, roll seat

[0038] 19, press roll

[0039] 20, guide column

[0040] 21, connecting shaft

[0041] 22, gear box

[0042] 23, profile steel

[0043] 24, roll way

[0044] 25, cold saw DETAILED DESCRIPTION

[0045] The structure is as follows: a front and rear clamping device of a cold saw is arranged between the roller tables 24 in front of and behind the cold saw 25; the main components include a base 1, a horizontal clamping system 2, and a longitudinal pressing system 3; the horizontal clamping system is installed on the base 1, and the longitudinal pressing system 2 is installed on the base 1. The horizontal clamping system 1 includes stepped shafts 4, gears 5, shaft sleeves 7, bearings 8, dust covers 6, swing arms 9 and 10, vertical rollers 11, roller shafts 12, horizontal hydraulic cylinders 13, pin shafts 14, and pressing plates 15; the two stepped shafts 4 are respectively installed on two stepped holes of a gear box 22 of the base 1 through two groups of bearings 8; the two gears 5 are installed on the two stepped shafts 4, and the two gears 5 are meshed with each other; the shaft sleeve 7 is installed between the bearing 8 and the gear 5, and is used for positioning the bearing 8 and the gear 5; the shaft end baffle is installed on the stepped shaft 4 through a bolt, and is used for fixing the bearing 8; the two dust covers 6 are installed on the stepped shaft 4, and are used for preventing dust and iron filings from entering the bearing 8; the swing arms 9 and 10 are installed on the stepped shaft 4, and are pressed above the dust covers 6; the two vertical rollers 11 are respectively installed on the swing arms 9 and 10 through the two roller shafts 12; the head of the horizontal hydraulic cylinder 13 is installed on the swing arm 9 through the pin shaft 14, the pressing plate 15, the positioning pin, and the bolt, and the middle trunnion of the horizontal hydraulic cylinder 9 is installed on the swing arm 10 through the pressing plate 15, the sliding bearing, the positioning pin, and the bolt. The longitudinal pressing system 2 includes a rack 17, a vertical hydraulic cylinder 16, a roller seat 18, a pressing roller 19, guide columns 20, a connecting shaft 21, and a baffle; the rack 17 is provided with two round holes and a strip-shaped hole; the pressing roller 19 is installed on the roller seat 18 through the shaft end baffle and the bolt; the two guide columns 20 are welded on the roller seat 18, one of the two guide columns 20 passes through the round hole of the rack 17, and the other guide column 20 passes through the strip-shaped hole of the rack 17; the head of the vertical hydraulic cylinder 16 is connected with the roller seat 18 through the connecting shaft 21, the head flange of the vertical hydraulic cylinder 16 is connected with the rack 17, and the vertical hydraulic cylinder 16 passes through the round hole in the middle of the rack 17.

[0046] Work flow: the roller 24 transports the steel 23 to the working position of the cold saw 25, first the horizontal clamping system 2 of the front and rear clamping device of the cold saw 25 acts, the horizontal hydraulic cylinder 13 drives the swing arm 9 and the swing arm 10, under the meshing action of the pair of gears 5, the swing arm 8 and the swing arm 10 are symmetrically clamped in the horizontal direction, drive a pair of vertical rollers 11 to clamp the steel 23, and keep the horizontal direction positioning under the pressure action of the horizontal hydraulic cylinder 13, then the vertical hydraulic cylinder 16 of the vertical pressing system 3 extends, drives the pressing roller 19 to act downward, and presses the upper surface of the steel 23, when the pressing roller 19 descends, the pair of guide columns 20 can limit the swing of the pressing roller 19, realize the stable pressing action, and keep the vertical direction positioning of the steel 23 under the pressure action of the vertical hydraulic cylinder 16, so that the four direction firm positioning of the steel 23 to be sawn is realized, the sawing precision is ensured, and the sawing effect is improved. After the sawing is finished, the horizontal hydraulic cylinder 13 retracts, the swing arm 9 and the swing arm 10 are symmetrically opened to return to the initial position, the vertical hydraulic cylinder 16 retracts, and the pressing roller 19 rises to return to the initial position, that is, a working cycle is completed. When the steel 23 needs to be cut, the front clamping device of the cold saw runs, when the steel 23 needs to be cut, the rear clamping device of the cold saw 25 runs, and when the steel needs to be sawn in sections, the front and rear clamping devices of the cold saw 25 run simultaneously.

Claims

1. A clamping device before and after a cold saw, characterized in that: The system includes a base, a horizontal clamping system, and a longitudinal pressing system. The horizontal clamping system includes two stepped shafts, a pair of gears, a dust cover, a first swing arm, a second swing arm, a pair of vertical rollers, a roller shaft, a horizontal hydraulic cylinder, a pin, a pressure plate, and a gearbox. The longitudinal pressing system includes a frame, a vertical hydraulic cylinder, a roller seat, a pressure roller, a guide column, and a connecting shaft. The gearbox is welded to the base, and parallel stepped holes are provided on the upper and lower sides of the gearbox. The stepped shafts are mounted on the stepped holes of the gearbox via bearings. The pair of gears, the first swing arm, the second swing arm, and the dust cover are all mounted on the stepped shafts. The pair of gears mesh with each other. The pair of vertical rollers are mounted on the first and second swing arms respectively via roller shafts. The head of the horizontal hydraulic cylinder is mounted on the first swing arm via a pin, and the trunnion in the middle of the horizontal hydraulic cylinder is mounted on the second swing arm via a pressure plate. When the horizontal hydraulic cylinder extends and retracts, it can drive the first and second swing arms. Under the meshing action of the pair of gears, the first and second swing arms can achieve symmetrical and equidistant opening and clamping actions.

2. The clamping device before and after a cold saw according to claim 1, characterized in that: The vertical roller in the horizontal clamping system is tapered, with a larger top and a smaller bottom. During the clamping process, it can exert a downward force on the steel sections on both sides, ensuring that the steel sections always remain in close contact with the roller surface.

3. The clamping device before and after a cold saw according to claim 1, characterized in that: The longitudinal pressing system is provided with two guide columns. The frame has a round hole and a strip hole on both sides. The two guide columns are welded to the roller seat. One guide column passes through the round hole of the frame and the other guide column passes through the strip hole of the frame. When the vertical hydraulic cylinder drives the pressure roller to move up and down, the guide columns restrict the sway of the pressure roller, so as to realize the stable lifting and lowering action of the pressure roller.

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