A hammer blade for a crusher and its manufacturing method

Abstract

A hammer piece for a crusher, characterized in that two pin holes (2) are provided at one end of the hammer piece matrix (1), and two pin rods are used to connect with the rotor of the crusher. The other end is the working end face (3). There is a groove in the middle of the working end face (3), and a rake-shaped scraping piece (4) is welded in the groove. The front end of the rake-shaped scraping piece (4) is a rake tooth (5). The widths of the rake teeth (5) are the same, and are also the same as the width of the groove. The thickness of the rake teeth (5) is less than the width of the working end face (3) of the hammer piece matrix (1), and the mutual ratio is between 1 / 2 and 1 / 5. It can break the pulp sheet into uniform small pieces one by one, with a plush-like periphery and no hard marks, and can solve the problem of uneven crushing of the tailings.

Description

Technical Field

[0001] The present invention relates to a hammer blade for a crusher and a manufacturing method thereof, especially a hammer blade and a manufacturing method thereof used in a water-drop type crusher, a vertical crusher, a double-rotor crusher, a multi-chamber crusher, a corrugated plate crusher, a sieve-less crusher, etc. Background Art

[0002] In the prior art, the hammer blade of a hammer mill is in the shape of a rectangular sheet. The manufacturing material of the hammer blade usually uses ordinary carbon steel as the matrix (1). One end of the hammer blade is provided with a pin hole (2), which is connected to the rotor of the crusher by a pin rod or the like. The other end of the hammer blade is the working end face (3). The front end and the side face of the working end face (3) are built-up welded with wear-resistant materials such as tungsten carbide, and the whole surface is subjected to carburizing hardening treatment. The pin hole (2) and the working end face (3) can also be manufactured in a shape with both ends being symmetrical. After one end is worn, the other end is replaced and reused.

[0003] However, the function of the hammer blade in the existing hammer mill technology can only crush the material, and it is impossible to control the shape of the material after crushing to maintain a uniform shape. Especially when it is applied to the crushing of virgin pulp paper, its special requirement is to crush the virgin pulp paper into uniform small pieces one by one, with a furry edge and no hard marks. Especially when it comes to the tail material of the virgin pulp paper, the tail material is short and uncontrollable, and the whole tail material will suddenly fall into the crusher or get stuck at the feeding port, resulting in uneven products. After consulting all technical materials, no such hammer blade and its manufacturing method have been seen, nor are there any cases with the same invention purpose. Summary of the Invention

[0004] The purpose of the present invention is to provide a hammer blade and a manufacturing method thereof, which can crush the virgin pulp paper into uniform small pieces one by one, with a furry edge and no hard marks, and can solve the problem of uneven crushing of the tail material.

[0005] The purpose of the present invention is realized through the following technical solutions. A hammer blade for a crusher uses a hammer blade matrix (1) made of ordinary steel. One end of the hammer blade matrix (1) is provided with a pin hole (2), which is connected to the rotor of the crusher by a pin rod. The other end of the hammer blade matrix (1) is the working end face (3). Wear-resistant material tungsten carbide is built-up welded on the front end and the side face of the working end face (3), and the surface is subjected to carburizing hardening treatment. The characteristic is that two pin holes (2) are provided at one end of the hammer blade matrix (1), and two pin rods are used to connect to the rotor of the crusher. The other end is the working end face (3). There is a groove in the middle of the working end face (3), and a rake-shaped scraping blade (4) is welded in the groove. The front end of the rake-shaped scraping blade (4) is a rake tooth (5). The widths of the rake teeth (5) are the same, and are also the same as the width of the groove. The thickness of the rake teeth (5) is less than the width of the working end face (3) of the hammer blade matrix (1), and the mutual ratio is between 1 / 2 and 1 / 5.

[0006] The manufacturing method thereof is that two pin holes (2) are provided at one end of the hammer piece matrix (1), a groove is opened in the middle of the working end face (3) at the other end of the matrix (1), the width dimension of the groove is slightly larger than the thickness of the rake-type scraping piece (4), a groove is opened at the tail end of the rake-type scraping piece (4), the width of the groove is slightly larger than the thickness of the hammer piece matrix (1), the two grooves are matched, so that the front end of the rake-type scraping piece (4) is aligned with the front end of the hammer piece matrix (1), and then they are vertically embedded and welded. Tungsten carbide, a wear-resistant material, is surfacing-welded at the front edge and the side surface of the rake teeth (5) and the working end face (3) of the hammer piece matrix (1), and then surface treatment is carried out. When installed and used, the rake-type hammer pieces (2) on the crusher rotor are installed in four groups, symmetrically arranged in pairs at 180 degrees, and staggered by one rake tooth (19).

[0007] For a hammer piece for a crusher using the above invention, two pin holes (2) are provided at one end of the hammer piece matrix (1) to prevent the hammer piece from shaking during work, avoid inconsistent hammering sequence, and make the small pieces of paper more uniform. The other end is the working end face (3). There is a groove in the middle of the working end face (3), and a rake-type scraping piece (4) is welded in the groove. The front end of the rake-type scraping piece (4) is the rake teeth (5). There are grooves between the rake teeth (5). The widths of the rake teeth (5) are the same and are also the same as the width of the groove. When installed and used, the rake-type hammer pieces (2) on the crusher rotor are installed in four groups, symmetrically arranged in pairs at 180 degrees, and staggered by one rake tooth (5), which makes the width of the paper product consistent. The rotation speed of the hammer piece is coordinated with the feeding speed of the paper pressing roller to control the length of the small pieces of paper and make the lengths consistent. Since the hammer piece in this case is in the form of high-speed tearing and pulverizing of paper, it can break the pulp pieces into uniform small pieces one by one, with a fluffy periphery and no hard marks. The thickness of the rake teeth (5) is less than the width of the working end face (3) of the hammer piece matrix (1). This is the key technology for generating an intermittent feeding state and is also the technology for solving the uniform pulverization of the tail material. During work, the front angle of the working end face (3) of the hammer piece matrix (1) first touches the front edge of the paper. Due to the small contact area, a groove is broken out on the paper. Subsequently, multiple rake teeth (5) hammer the paper again. At this time, because the working end face (3) is long, the paper groove rides on the working end face (3), the paper is held up, and after the working end face (3) passes, feeding starts again, forming a working state of feeding, stopping, feeding, and stopping, effectively preventing a large amount of tail material from feeding into the crusher all at once. The ratio of the thickness of the rake teeth (5) to the width of the working end face (3) of the hammer piece matrix (1) is between 1 / 2 and 1 / 5. When it is greater than 1 / 2, a large amount of tail material will feed into the crusher all at once. When it is less than 1 / 5, the service life of the rake teeth (5) is short. The front end of the rake-type scraping piece (4) is aligned with the front end of the hammer piece matrix (1), and then they are vertically embedded and welded. Tungsten carbide, a wear-resistant material, is surfacing-welded at the front edge and the side surface of the rake teeth (5) and the front edge and the side surface of the working end face (3) of the hammer piece matrix (1), and then surface treatment is carried out, which can make the hammer piece firm and durable. Description of the Drawings

[0008] Figure 1 It is a hammer piece matrix (1) of a hammer piece. In the figure, there are two pin holes (2) for installation at one end of the hammer piece matrix (1), and the other end is the working end face (3). There is a groove in the middle of the working end face (3).

[0009] Figure 2 It is a schematic diagram of a rake-shaped scraping piece (4) of a hammer piece. The front end of the rake-shaped scraping piece (4) is rake teeth (5). There are grooves between the rake teeth (5), and the width of the rake teeth (5) is the same as the width of the groove.

[0010] Figure 3 It is a front view of a hammer piece. The hammer piece in this case is formed by cross-installing and welding a hammer piece matrix (1) and a rake-shaped scraping piece (4).

[0011] Figure 4 It is a top view of a hammer piece. The width of the working end face (3) of the hammer piece matrix (1) is greater than the thickness of the rake teeth (5). The ratio of the thickness of the rake teeth (5) to the width of the working end face (3) of the hammer piece matrix (1) is between 1 / 2 and 1 / 5.

[0012] Figure 5 It is a 3D view of a hammer piece. Carbides are surfacing-welded on the working end face (3), the front end and the side of the rake teeth (5).

[0013] Figure 6 It is an arrangement and development view of a hammer piece. The rake-shaped hammer pieces (2) are installed in four groups, symmetrically paired at 180 degrees, and arranged with a stagger of one rake tooth (19). Specific implementation mode

[0014] The following further describes the present invention with reference to the embodiments given in the accompanying drawings:

[0015] A hammer piece for a crusher, using a hammer piece matrix (1) made of ordinary steel. One end of the hammer piece matrix (1) is provided with pin holes (2), which are connected to the rotor of the crusher by pin rods. The other end of the hammer piece matrix (1) is the working end face (3). Wear-resistant material tungsten carbide is surfacing-welded on the front end and the side of the working end face (3), and the surface is subjected to carburizing hardening treatment. Its characteristics are that two pin holes (2) are provided at one end of the hammer piece matrix (1), and two pin rods are used to connect to the rotor of the crusher. The other end is the working end face (3). There is a groove in the middle of the working end face (3), and a rake-shaped scraping piece (4) is welded in the groove. The front end of the rake-shaped scraping piece (4) is rake teeth (5). The width of the rake teeth (5) is the same, and is also the same as the width of the groove. The thickness of the rake teeth (5) is less than the width of the working end face (3) of the hammer piece matrix (1), and the mutual ratio is between 1 / 2 and 1 / 5.

[0016] Its manufacturing method is as follows: at one end of the hammer piece matrix (1), two pin holes (2) are provided; in the middle of the working end face (3) at the other end of the matrix (1), a groove is opened, and the width dimension of the groove is slightly larger than the thickness of the rake scraping piece (4); at the tail end of the rake scraping piece (4), a groove is opened, and the width of the groove is slightly larger than the thickness of the hammer piece matrix (1). The two grooves are matched so that the front ends of the rake scraping piece (4) and the hammer piece matrix (1) are aligned, and then they are vertically embedded and welded. Tungsten carbide, a wear-resistant material, is surfacing-welded on the rake teeth (5), the leading edge and the side surface of the working end face (3) of the hammer piece matrix (1), and then surface treatment is carried out. When in installation and use, the rake hammers (2) on the crusher rotor are installed in four groups, symmetrically in pairs at 180 degrees, and arranged with a stagger of one rake tooth (19).

[0017] Beneficial effects

[0018] A hammer for a pulverizer adopts the above invention. One end of the hammer mother body (1) is provided with two pin holes (2) to prevent the hammer from shaking during operation, avoid inconsistent hammering sequence, and make the small pieces of paper more uniform. The other end is a working end face (3). There is a groove in the middle of the working end face (3). A rake scraper (4) is welded in the groove. The front end of the rake scraper (4) is a rake tooth (5). The width of the rake teeth (5) is the same and the same as the width of the groove. When installed and used, the rake hammers (2) on the rotor of the pulverizer are installed in four groups, 180 degrees symmetrically in pairs, and staggered with one rake tooth (5), so that the width of the paper products is consistent. The rotation speed of the hammer cooperates with the feeding speed of the paper pressing roller to control the length of the small paper pieces and make the length consistent. Since the hammer in this case is a high-speed tearing paper pulverization form, it can break the pulp sheets into uniform small pieces, with fluffy edges and no hard marks. The thickness of the rake teeth (5) is smaller than the width of the working end face (3) of the hammer mother body (1). This is a key technology for producing an intermittent feeding state and a technology for solving the problem of uniform crushing of tailings. When working, the front corner of the working end face (3) of the hammer mother body (1) first touches the front edge of the paper sheet. Due to the small contact surface, a groove is broken out of the paper sheet. Then, multiple rake teeth (5) hammer the paper sheet again. At this time, due to the long working end face (3), the paper sheet groove rides on the working end face (3), and the paper sheet is supported. After the working end face (3) passes, feeding starts again, forming a feed, stop, feed, stop working state, effectively preventing large tailings from being fed into the crusher at the same time. The ratio of the thickness of the rake teeth (5) to the width of the working end face (3) of the hammer mother body (1) is between 1 / 2 and 1 / 5. When it is greater than 1 / 2, large tailings will be fed into the crusher at the same time. When it is less than 1 / 5, the service life of the rake teeth (5) is short. The front end of the rake scraper (4) is aligned with the front end of the hammer mother body (1), and then they are embedded vertically and welded. The front edge and side of the rake teeth (5) and the front edge and side of the working end face (3) of the hammer mother body (1) are all welded with wear-resistant material tungsten carbide, and then surface treatment is performed to make the hammer firm and durable. The hammer and the manufacturing method of the present invention are actually used to break pulp sheets into uniform small pieces with fluffy edges and no hard marks, and can solve the problem of uneven crushing of tailings, with good results.

[0019] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent change or modification to the above examples based on the technical essence of the present invention, such as the change of various irregular scraper patterns of the rake scraper (4), changing the scraper into a scraper rod, a scraper strip, changing the shape into a cylindrical, prismatic, triangular, etc., or using a plurality of independent scrapers, are all within the scope of the present invention. Any other form of crusher, such as a water drop crusher, a vertical crusher, etc., which adopts this technical solution, or is installed in six or eight groups, etc., also falls within the scope of the technical solution of the present invention.

Claims

1. A hammer blade for a crusher, comprising a hammer blade matrix (1) made of ordinary steel. One end of the hammer blade matrix (1) is provided with a pin hole (2) and is connected to the rotor of the crusher by a pin rod. The other end of the hammer blade matrix (1) is a working end face (3). Wear-resistant material tungsten carbide is surfacing-welded on the front end and side face of the working end face (3), and the surface is subjected to carburizing hardening treatment. It is characterized in that One end of the hammer piece matrix (1) is provided with two pin holes (2), and is connected to the rotor of the crusher by two pin rods. The other end of the hammer piece matrix (1) is the working end face (3); there is a groove in the middle of the working end face (3), and a rake-shaped scraping blade (4) is welded in the groove. The front end of the rake-shaped scraping blade (4) is a rake tooth (5). The widths of the rake teeth (5) are the same, and are also the same as the width of the groove. The thickness of the rake teeth (5) is less than the width of the working end face (3) of the hammer piece matrix (1), and the mutual ratio is between 1 / 2 and 1 / 5.

2. A manufacturing method of the hammer blade for a crusher according to claim 1, characterized in that First, two pin holes (2) are opened at one end of the hammer piece matrix (1), and a groove is opened in the middle of the working end face (3) at the other end of the hammer piece matrix (1). The width of the groove is slightly larger than the thickness of the rake-shaped scraping blade (4). A groove is opened at the tail end of the rake-shaped scraping blade (4), and the width of the groove is slightly larger than the thickness of the hammer piece matrix (1). The two grooves are matched so that the front ends of the rake-shaped scraping blade (4) and the hammer piece matrix (1) can be aligned, and then they are vertically embedded and welded.

3. A manufacturing method according to claim 2, characterized in that Tungsten carbide, a wear-resistant material, is surfacing welded at the front edge and side of the rake teeth (5) and at the front edge and side of the working end face (3) of the hammer piece matrix (1), and then surface treatment is carried out.

4. A manufacturing method according to claim 2, characterized in that When installed and used, the hammer pieces on the crusher rotor are installed in four groups, symmetrically arranged in pairs at 180 degrees, and staggered by one rake tooth (5).

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