WO2017113448A1

WO2017113448A1 - Spreading device for form grinding machine

Info

Publication number: WO2017113448A1
Application number: PCT/CN2016/071340
Authority: WO
Inventors: 李占华
Original assignee: 廊坊盛森磨具有限公司
Priority date: 2015-12-30
Filing date: 2016-01-19
Publication date: 2017-07-06

Abstract

A spreading device for a form grinding machine is disclosed. The spreading device comprises an air flow generating mechanism and a scraping mechanism, wherein the scraping mechanism comprises a scraper (2) and a 3-way pipe (1) for horizontally spreading a molding material in a mold cavity; the air flow generating mechanism comprises an air compressor, and the air compressor has an outlet pipe having an electric control valve and a pressure-limiting valve sequentially connected thereto, and the air flow generating mechanism is used to generate a designated negative pressure and is in communication with the scraping mechanism, and configured to suction and remove an excessive amount of the molding material. Instead of spreading materials by a spirally ascending technique as in the conventional approach, the spreading device horizontally spreads material, ensuring the molding material to have a uniform thickness before pressing, avoiding unbalanced materials, effectively absorbing excessive materials and preventing the accumulation of materials resulting from excessive materials.

Description

Spreading device for grinding wheel forming machine

Technical field

The invention belongs to a grinding wheel manufacturing device, and particularly relates to a spreading device for a grinding wheel forming machine.

Background technique

The grinding wheel is also called a fixed abrasive. It is a kind of abrasive which has a certain strength by a bonding agent to fix a common abrasive into a certain shape (mostly round, with a through hole in the center). Generally, it consists of abrasives, binders, and pores. In the traditional grinding wheel manufacturing process, it is necessary to mix the sand with the binder and other auxiliary materials as raw materials through the mixing device until the mixture is evenly distributed, that is, the molding material, and then can be placed in a molding die for further molding. The molding compound is placed into the molding die, and the molding material is uniformly evenly distributed in the special mold required for molding by the rotary micro-lifting device, and then the stepping motor drives the scraping plate to vertically descend to a set distance from the bottom of the mold. At this time, the forming mold starts to rotate, and at the same time, the stepping motor is used to drive the scraping plate to vertically and vertically lift up slightly. After the micro-lifting is completed, the spreading process is finished after the mold stops rotating, and then press-pressed by a press, and finally heated by the oven. After hardening, it is the finished product. After the finished product has passed the test, it is qualified to produce the finished product. Finally, it can be marketed for sale and use after packaging.

However, in actual production, unbalanced grinding wheels occur frequently. The main reason is that the geometrical dimensions of the grinding wheel are asymmetrical, the density of each part of the grinding wheel is not uniform, and the thickness of each part of the product is inconsistent, which leads to the static imbalance of the finished product and the in use. Unbalanced. When the dynamic and unbalanced grinding wheel runs at high speed, vibration will occur. The hand feel is not good when cutting, the polishing degree of the cutting surface is not good, and even the grinding wheel is broken and broken during use, and even poses a threat to the safety of the user.

Summary of the invention

In order to solve the above problems in the prior art, the present invention provides a spreading device for a grinding wheel forming machine.

The technical solution adopted by the invention is:

A spreading device for a grinding wheel forming machine, comprising an airflow generating mechanism and a scraping mechanism, wherein the scraping mechanism is for horizontally leveling a molding material in a mold cavity; and the airflow generating mechanism is configured to generate a rated Negative pressure, and in communication with the scraping mechanism, sucking away excess molding compound.

The inventors have found that in the prior art distribution device, the molding material is spirally leveled during the spreading process. At the end of the aggregating process, that is, when the scraping plate is slightly lifted away from the molding material, the position of the scraping plate relative to the bottom of the mold at this time cannot form a closed ring with respect to the relative starting position, so if the amount of the scraping plate is excessive, the molding may be caused. The material is piled up, or in the position near the end point to the end point, the molding material is more, resulting in a larger thickness of the finished product at the position. Both of the above results are stacked and cause dynamic and static imbalance. Unbalanced motion and static will cause vibration during use, poor hand feel during cutting and grinding operations, poor polishing of the cutting and grinding surface, and even cracking and breaking during use, posing a threat to user safety.

On the basis of discovering the defects of the prior art, the inventor canceled the process of micro-lifting of the scraper plate, and no longer carried out the spiral ascending process, but became a horizontal rotating spread (specifically, the scraper was perpendicular to the bottom of the forming mold) The lower edge of the scraper is parallel to the plane line of the bottom of the mold. When rotating, excess molding material is deposited on the opposite side of the scraper plate and the rotation of the mold. After reaching the set number of rotations, all the materials except the excess material are evenly distributed. At this time, the airflow generating mechanism starts to work, and the excess molding material is sucked out from the mold. The mold is always in rotation throughout the process. At this point, the amortization process ends and proceeds to the next process. According to the products of different specifications and sizes, the number of rotations of the mold is different, so the working duration of the preset suction device is not equal, so as to ensure that all the excess molding materials are completely removed, and the molding materials that have been evenly spread are not destroyed, and the suction is removed. After that, stop sucking and the scraper plate is lifted vertically to the preset position.

Optionally, the airflow generating mechanism comprises an air compressor, and an electric control valve and a pressure limiting valve are sequentially connected to the outlet pipeline of the air compressor. Among them, the air compressor can generate high pressure gas as the power to absorb excess molding material; the electric control valve is used to control the gas opening time and adapt to the needs of different specifications; the pressure limiting valve can control the gas flow rate, thereby correspondingly changing the pressure.

Optionally, the scraping mechanism comprises a scraper plate and a tee pipe, and the outer side of the scraper plate is provided with at least one suction port; the tee pipe comprises an intake pipe cavity, an air outlet pipe cavity and a suction material a lumen, the nozzle of the suction lumen is docked with the suction opening.

Optionally, the intake duct and the outlet duct are disposed on two sides of the horizontal direction of the tee, and a nozzle axis of the intake duct and a nozzle of the outlet lumen The axis of the inlet is located on the same horizontal line; the diameter of the orifice of the inlet lumen is smaller than the diameter of the orifice of the outlet lumen.

Optionally, the end of the intake lumen extends obliquely downward to form the suction lumen.

Optionally, the scraper plate is vertically disposed, the bottom edge length of the scraper plate is equal to the radius of the mold cavity, and the distance from the suction port to the bottom edge is 0.08-0.6 cm.

Further, a fine adjustment mechanism is further included for adjusting a horizontal and vertical position of the scraping mechanism; the fine adjustment mechanism includes a balance seat and a base, the balance seat and the base are arranged up and down, and both are rotated by a rotating shaft Connected, the balance seat swings in a vertical plane around the rotating shaft, and the swing range is 20-160°.

Optionally, a center of the top surface of the balance seat is provided with a connecting hole for mounting a vertical lifting rod, and one end of the balance seat is mounted with a vertical bolt, and the vertical bolt penetrates the balance seat and is disposed at On the top surface of the base, the other end of the balance seat is mounted with a vertical spring, and the vertical spring is pressed between the balance seat and the base.

Optionally, a horizontal rail is disposed on a bottom surface of the base, and the scraping mechanism is slidably engaged with the horizontal rail.

Optionally, one end of the horizontal rail is blocked, a horizontal spring and a lateral bolt are disposed in the horizontal rail, the transverse spring is located at a blocking end of the horizontal rail, and the horizontal bolt is screwed at the level The other end of the rail presses the transverse spring to slide the scraping mechanism to change the horizontal position.

The invention has the beneficial effects that: on the basis of discovering the defects of the prior art, the traditional spiral rising spreading mode is turned into a horizontal spreading material to ensure uniform thickness of the molding material before pressing, and avoiding the occurrence of production finished products. Unbalanced situation; at the same time, it can effectively remove excess materials and prevent material accumulation caused by excessive feeding.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention;

Figure 2 is a side view of the tee of the present invention;

Figure 3 is a front elevational view of the tee of the present invention;

Figure 4 is a schematic view showing the structure of the fine adjustment mechanism of the present invention.

In the figure: 1, three-way pipe; 2, scraper plate; 3, fine-tuning mechanism; 101, air outlet lumen; 102, intake lumen; 103, suction lumen; 301, balance seat; 302, base; 303, vertical bolts; 304, vertical springs; 305 lateral springs; 306, transverse bolts.

detailed description

The invention provides a spreading device for a grinding wheel forming machine, comprising an airflow generating mechanism and a scraping mechanism, wherein the scraping mechanism is used for horizontally leveling a molding material in a mold cavity; the airflow generating mechanism is used To generate a nominal negative pressure and communicate with the scraping mechanism to remove excess molding compound.

The airflow generating mechanism includes an air compressor, and an electric control valve and a pressure limiting valve are sequentially connected to the outlet pipe of the air compressor.

As shown in FIGS. 1 to 3, the scraping mechanism includes a scraper plate 2 and a tee pipe 1, wherein the tee pipe 1 includes an intake pipe cavity 102, an air outlet pipe cavity 101, and a suction pipe cavity 103. The intake lumen 102 and the outlet lumen 101 are disposed on both sides of the horizontal direction of the tee 1 , and the orifice axis of the inlet lumen 102 and the tube of the outlet lumen 101 The axis of the mouth is on the same horizontal line; the diameter of the orifice of the inlet lumen 102 is smaller than the diameter of the orifice of the outlet lumen 101. The end of the intake duct 102 is inclined downwardly to form the suction duct cavity 103, that is, in three pipelines, the intake duct 102 and the outlet duct 101 are horizontally disposed, and the suction duct 103 is inclined. of. The nozzle of the intake duct 102 is screwed to the blower nozzle (connected with the airflow generating device), and the nozzle of the outlet duct 101 is provided with an air outlet, and is connected to the residual material collecting mechanism through the pipeline.

The scraper plate 2 is vertically disposed, the length of the bottom edge of the scraper plate 2 is equal to the radius of the mold cavity used, and the outer side of the scraper plate 2 is provided with at least one suction port, the suction port The distance to the bottom edge is 0.08 to 0.6 cm. The scraper plate is a "convex" type scraper plate with two mounting holes at the top for Installed on the tee pipe, after installation, the suction port is docked with the nozzle of the suction pipe cavity, and the lower plane of the tee pipe 1 does not exceed the bottom edge of the scraper plate, so that only the scraper plate contacts the molding material.

During processing, the stepping motor drives the tee (the scraper plate has been screwed to the tee) to vertically descend into the mold, so that the scraper is at a certain height from the bottom surface of the mold cavity, and the mold starts to rotate for three weeks (or According to the product specifications, after the mold is rotated several times, the equalization process of the required molding material is completed. The mold continues to rotate, and the excess molding material will gradually concentrate under the centrifugal force of the circular motion and the resistance of the scraper plate (the scraper plate does not coincide with the center line of the mold and the angle is perpendicular to the circumferential tangential direction of the mold rotation). To the intersection of the edge of the mold and the scraper, that is, accumulate at the suction port. At this time, the electric control valve is opened, and the high pressure gas flows toward the pressure limiting valve. After the pressure limiting valve is controlled to the rated air pressure, the high pressure gas is blown into the tee pipe from the intake duct cavity, and is maintained by the intake duct and the outlet duct. Horizontal, high velocity airflow is ejected through the outlet lumen. The high-speed airflow is blown, the radius of the intake pipe cavity is smaller than the radius of the air outlet pipe cavity, the air pressure around the airflow flow path is less than the atmospheric pressure, and a negative pressure is formed, and the remaining material is pushed by the external atmospheric pressure into the residual material lumen, and follows the gas outlet lumen. Blow to the residual material collection facility. After the above process is completed, the electric control valve closes the flow of the high pressure gas, and then the stepping motor drives the scraper plate to rise vertically, and the mold stops rotating. The amortization process ends.

As an embodiment of the present invention, the present invention also includes a fine adjustment mechanism for adjusting the horizontal and vertical positions of the scraping mechanism.

As shown in FIG. 4, the fine adjustment mechanism 3 includes a balance seat 301 and a base 302. The balance base 301 and the base 302 are arranged up and down, and the two are rotatably connected by a rotating shaft. The balance seat 301 rotates around the base. The shaft oscillates in a vertical plane with a range of 20 to 160°.

A center of the top surface of the balance seat 301 is provided with a connecting hole for mounting a vertical lifting rod for lifting or lowering the device of the present invention. One end of the balance seat 301 is mounted with a vertical bolt 303. The vertical bolt 303 extends through the balance base 301 and abuts against the top surface of the base 302. The other end of the balance base 301 is mounted. There is a vertical spring 304, and the vertical spring pressure 304 is disposed between the balance seat 301 and the base 302. The bottom surface of the balance base 301 further defines a limit hole, and the vertical spring 304 is disposed at the limit hole. In order to prevent its instigation. When adjusting, tighten or loosen the vertical bolts, the vertical springs can be elastically changed to adaptively change the distance, and the balance seat is rotated by a certain angle around the rotating shaft until the lower edge of the scraping mechanism scraper is adjusted to It is parallel with the bottom surface of the mold cavity.

A horizontal rail is disposed on a bottom surface of the base 302, and the scraping mechanism (a top end of the tee or a top end of the scraper) is slidably engaged with the horizontal rail. One end of the horizontal rail is blocked, and a horizontal spring 305 and a lateral bolt 306 are disposed in the horizontal rail. The lateral spring 305 is located at the blocking end of the horizontal rail, and the horizontal bolt 306 is screwed at the level. The other end of the track presses the transverse spring 305 to slide the scraping mechanism to change the horizontal position. When the transverse bolt is loosened, the compressed transverse spring pushes the scraping mechanism (the top end of the tee or the top end of the scraper) in the direction of the transverse bolt by its elastic force, thereby realizing the adjustment of the horizontal position of the scraping mechanism.

The present invention is not limited to the above-described preferred embodiments, and any other form of product can be derived by anyone of the present invention, but without any change in shape or structure, it is the same as or equivalent to the present application. Approximate technical solutions are all within the scope of the present invention.

Claims

A spreading device for a grinding wheel forming machine, comprising: an airflow generating mechanism and a scraping mechanism, wherein

The scraping mechanism is configured to horizontally level the molding material in the mold cavity;

The airflow generating mechanism is configured to generate a rated negative pressure and communicate with the scraping mechanism to absorb excess molding material.
The spreading device for a grinding wheel forming machine according to claim 1, wherein the airflow generating mechanism comprises an air compressor, and an electric control valve and a pressure limiting valve are sequentially connected to the outlet pipe of the air compressor.
The spreading device for a grinding wheel forming machine according to claim 1, wherein the scraping mechanism comprises a scraping plate and a tee, and the outer side of the scraping plate is provided with at least one suction opening; The tee tube includes an intake lumen, an outlet lumen, and a suction lumen, and the nozzle of the suction lumen is docked with the suction opening.
The spreading device for a grinding wheel forming machine according to claim 3, wherein the intake duct and the outlet duct are disposed on both sides of a horizontal direction of the tee, and the intake air The orifice axis of the lumen is on the same horizontal line as the axis of the orifice of the outlet lumen; the diameter of the orifice of the inlet lumen is smaller than the diameter of the orifice of the outlet lumen.
A spreading device for a grinding wheel forming machine according to claim 4, wherein the end of the intake duct extends obliquely downward to form the suction duct cavity.
A spreading device for a grinding wheel forming machine according to claim 3, wherein said scraping plate is vertically disposed, a length of a bottom edge of said scraping plate is equal to a radius of said mold cavity, said suction material The distance from the mouth to the bottom edge is 0.08 to 0.6 cm.
A spreading device for a grinding wheel forming machine according to any one of claims 1 to 6, further comprising: a fine adjustment mechanism for adjusting a horizontal and vertical position of the scraping mechanism; the fine adjustment mechanism including a balance seat And a base, the balance seat and the base are arranged up and down, and the two are rotatably connected by a rotating shaft, and the balance seat swings in a vertical plane around the rotating shaft, and the swing range is 20-160°.
The materializing device for a grinding wheel forming machine according to claim 7, wherein a center of the top surface of the balance seat is provided with a connecting hole for mounting a vertical lifting rod, and one end of the balance seat is provided with a vertical bolt. The vertical bolt penetrates the balance seat and abuts against a top surface of the base, and the other end of the balance seat is mounted with a vertical spring, and the vertical spring is pressed on the balance seat and Between the pedestals.
A spreading device for a grinding wheel forming machine according to claim 8, wherein a horizontal rail is provided on a bottom surface of the base, and the scraping mechanism is slidably engaged with the horizontal rail.
A spreading device for a grinding wheel forming machine according to claim 9, wherein one end of said horizontal rail is blocked, and said horizontal rail is provided with a lateral spring and a lateral bolt, said transverse spring being located at said horizontal rail The blocking end is screwed to the other end of the horizontal rail and presses the lateral spring to cause the scraping mechanism to slide to change the horizontal position.