Detailed Introduction of Shearing Machine

Shearing machine is the most widely used in various industrial sectors of the plate shearing equipment. China‘s shearing machine shear plate size from 1mm * 1000mm to 40mm * 4000mm to form a complete series, the largest production of 50mm * 3200mm mechanical drive shears, in special industries produced 7mm * 7000mm shears. Shearing machine belongs to the linear shearing machine category, mainly used to cut the linear edge of various sizes of metal plates. With the development of China‘s manufacturing industry, the development of shearing machine bed is increasingly becoming the mainstay of the machinery manufacturing industry, general-purpose high-performance shearing machine, widely used in aviation, automotive, agricultural machinery, electrical machinery, electrical appliances, instruments, medical equipment, home appliances, hardware and other industries. For shearing machine, do you want to know more about it?

Classification and structural characteristics of shearing machine
A, classification
1, flat-edged shearing machine
Good shear quality, distortion deformation is small, but the shear force is large, energy consumption. More mechanical transmission. The shear up and down the two blades parallel to each other, commonly used in steel rolling mills hot shear initial rolling billet and slab; according to its shear can be divided into up-cut and down-cut type.

2, oblique blade shear
Shear the upper and lower two blades into an angle, the general upper blade is inclined, the angle of inclination is generally 1 ° ~ 6 °. Oblique blade shear force than flat blade shear small, so the motor power and weight of the machine is greatly reduced, the most practical applications, shearing machine manufacturers to produce such shears. This type of shearing machine according to the blade movement form gate shear and swing shear; according to the main transmission system is divided into two categories: hydraulic transmission and mechanical transmission.

3, multi-purpose shearing machine.
(1) plate bending shear: that is, in the same machine can be completed on the shear and bending two processes.
(2) joint punching and shearing machine: can complete the plate shear, but also shear the profile, more for the undercutting process.

4, special plate shears.
(1) plate unrolling line shear: used for plate unrolling and leveling line, in line with the production line speed shear requirements and designed for high-speed shear, thick plate line more hydraulic high-speed shear, thin plate line more with pneumatic shear; high-speed line with flying shear, continuous production, high efficiency.
(2) steel structure production line shearing machine: more for angle steel, H-beam automatic production line to complete the shearing process.
(3) cold-forming line shearing machine: for example, the car longitudinal beam cold-forming line, carriage side fender production line, color steel plate forming line and other production lines configured for special shearing machine.

Second, structural features
1, the machine is equipped with punching, shearing and folding three processing units, through the manual or foot switch can be separately or simultaneously bus punching, shearing, folding processing. The machine is highly productive and easy to use.

2、The working stroke of each processing unit can be easily adjusted to reduce processing time and improve production efficiency. By changing the mold can also achieve a variety of processing functions, such as punching long round holes, bending vertical bending, bending flat bending, embossing and flattening.

3, bending unit for closed structure, horizontal processing method to ensure the strength of the bending unit structure. By replacing the bending tooling can complete the workpiece flat bending, vertical bending, embossing and flattening processing; different thickness of the bus bar bending, by adjusting the work cylinder induction switch to control the travel distance, displacement travel counter corresponding to different numbers, you can complete the corresponding bending angle.

4, punching, shearing processing unit using vertical processing mode, the machine is equipped with a manual button and foot switch two types of operation, simple operation, flexible and convenient to use, generally skilled workers can easily use the operation.

The shearing machine undercutting process
1、Applicable scope
(1) Applicable to the shearing of material blanks of various ferrous metals with straight edges and other similar undercutting.
(2) the sheared material thickness of the basic size of 0.5-6 mm, the maximum width of 2500 mm.

2、Material
(1) the material should meet the requirements of the technical conditions.
(2) the material is cold-rolled steel plate, the surface is not allowed to have serious scuffs, scratches, impurities, rust spots.

3、Equipment and process equipment, tools
(1) plate, pliers, oil pot, screwdriver, hand hammer.
(2) vernier calipers, outside diameter micrometer, steel plate ruler, steel tape measure, right angle ruler, scribing needle.

4、Process preparation
(1) familiar with the drawings and the relevant process requirements, fully understand the geometry and size requirements of the parts to be processed.
(2) According to the material specifications of the drawings, and check whether the material meets the process requirements.
(3) In order to reduce consumption and improve the utilization rate of the material, reasonable calculations should be made to take the set cutting method.
(4) The qualified materials will be neatly stacked next to the machine tool.
(5) to shear each oil hole oiling.
(6) check the shear bed blade is sharp and fastened firmly, and according to the thickness of the plate material to adjust the blade gap.

5、Process specification
(1) according to the production batch to take a reasonable set of cutting methods, first under the big material, then under the small material, try to improve the utilization of materials.
(2) parts for the bending parts or material pattern requirements, should be cut according to its material pattern, rolling the direction of the exhibition. 

Shearing machine operation matters
1, before work to carefully check whether the shearing machine is normal, electrical equipment is intact, lubrication system is smooth; clear the table and around the placement of tools, gauges and other debris, as well as edge waste.

2, start the shearing machine for a number of idle cycles to ensure that under normal circumstances, try to cut different thicknesses of plate material, from thin to thick.

3, do not operate the shearing machine alone 1 person, should be 2-3 people to coordinate the feeding, control the size accuracy and take the material, shearing machine and determine the unified command by 1 person.

4, the shearing machine belt, flywheel, gears and shafts and other moving parts must be installed protective cover.

5, shearing machine placed fence to prevent the operator‘s hands from entering the scissors fall area. When working, it is strictly prohibited to pick up the ground scrap, so as not to be injured by the falling workpiece.

6, shear operator feeding fingers from the scissors mouth should be kept at least 200mm away from the distance, and leave the pressing device. The protective fence placed on the shearing machine should not block the operator‘s eyes and not see the cutting part. After the operation of the scrap generated by the angular, the operator should be removed in a timely manner to prevent stab wounds, cuts.

7, cannot cut hardened material, and never allow cutting more than the working capacity of the shear bed.

Shear blade clearance should be how to adjust?
1, remove the next blade, cleaned piece by piece.

2, the blade can be used on all sides, pick a good side of the sticky installation. And check the blade horizontal and vertical straightness of the two directions.

3、Remove the upper blade and clean it piece by piece. Similarly, the blade can be used on all sides, select a good side to install tightly. And check the horizontal and vertical straightness of the blade in two directions.

4, the upper blade is fixed cannot be adjusted, we adjust the lower blade to adjust the shear blade gap.

5, find the lower blade of the left and right two pull the gap screw is generally at the outermost edge.

6, find the lower blade of the left and right two advance the lower blade to narrow the gap tightening screw it has a locking ready tightening nut on top. Generally, in the inner side.

7, loosen the lower blade table left and right four bolts.

8, the manual plate car will be lowered to the appropriate position on the upper blade, the operator to the shear drop zone to start adjusting.

9, use the plug ruler from the left hand upper and lower blades not occluded part of the coarse adjustment to 0.5 mm.

10, manual disc car so that the blade up to the middle position coarse adjustment to 0.5 mm.

11、Manual pan-turn so that the blade moves up to the right side of the upper and lower blades are not disengaged in the middle of the position coarse adjustment to 0.5 mm.

12、Manual disc carriage to lower the upper blade to the appropriate position, start fine adjustment.

13, the use of the plug ruler from the left hand upper and lower blades are not bitten parts of the start of fine tuning to the plug ruler three silk can enter five silks cannot enter.

14、Manual disc car so that the blade moved up to the middle position to start fine adjustment to the plug ruler three wire can enter five wire cannot enter.

15、Manual disc car so that the blade moved up to the right side of the upper and lower knife is not disconnected from the position to start fine tuning to the plug ruler three wire can enter five wire cannot enter.

16、The above is for the new car to fine tune to the plug ruler three wire can enter five wire cannot enter.

17、For old cars, fine tune to the point where the stopper can enter 20 wires but not the other way around. Or according to the required shear sheet metal thickness of 1/10 - 1/20 for appropriate adjustment.

18、In the case of sharp edge of shearing machine, if there is burr on the edge of the sheared sheet, the gap between the upper and lower blades can be reduced appropriately.

How to distinguish the quality of shearing machine blades
1, the first thing to look at is the price of shearing machine blades: in the case of the same material and processing technology, the price of shearing machine blades is similar. Customers can first understand the production of shearing machine blades used in the market price of raw materials, and then compare the shearing machine blade manufacturer‘s offer. If the offer is lower or slightly higher than the price of the material, then it is in this filling good.

2, production process: In addition to the material, that is the production process of the processing technology. Shearer blade production, each process is very important, and the most important is the heat treatment, and a set of qualified shearer blade, at least two times into the furnace quenching, in order to achieve the same blade hardness inside and outside, the edge tough and not brittle, durable wear-resistant effect. Some shearing machine blade manufacturers, in order to reduce costs, to reduce the number of quenching, or even quenching fire with native methods. If you don‘t want customers to buy such a shearer blade, first of all, or from the price comparison. The second is to buy, with metal hardness tester in to the body, multiple tests, to see if the hardness standards and consistent.

3, precision: general shearing machine blade parallelism in 0.03mm, the thickness of the full length of the blade cannot exceed 0.03mm, and can achieve such precision, in order to be considered a set of qualified shearing machine blades. After the purchase of the available measuring tools, first compared to the error of the two ends of a single piece, and then piece by piece measurement of the accuracy of the whole set of blades is consistent, and then there to see if there is no gap at the joint, touch with your hands whether the flat no touch feeling.

4, warranty: a set of high-quality qualified shearing machine blades, in normal use, less than available for one or two years, more than three or five years and then resharpened. Therefore, when purchasing must ask for after-sales guarantee, sign an agreement. Shearer blade manufacturers will promise users that within a certain period of time, such as quality problems, unconditionally refundable and exchangeable. If there is no such commitment, the quality of the blade is difficult to have a guarantee.

Shearing machine maintenance and maintenance
1, in strict accordance with the operating procedures for operation.

2, each time before the start of the machine according to the requirements of the lubrication chart at regular intervals, fixed points, quantitative plus lubricating oil, oil should be clean without precipitation;

3, the machine tool must often be kept clean, unpainted part of the anti-rust grease.

4, the motor bearings within the lubricating oil should be regularly replaced and refilled, and often check whether the electrical parts work properly and safely.

5, regularly check the v-belt, handle, knob, button is damaged, serious wear and tear should be replaced in a timely manner, and report spare parts to supplement.

6、Regularly check and repair switches, insurance, handles, to ensure that they work reliably.

7, 10 minutes before the end of each day, the machine oil lubrication and scrubbing clean machine tools.

8, non-specified personnel are strictly prohibited from operating the equipment, usually must do people away from the machine stop.