Internal large-mouth and small-mouth grinding machine rhombic barrel internal integral rubber lining die and its rubber lining method

Abstract

The invention discloses an integrated rubber mold for the interior of a prismatic barrel of a grinder which is large in the middle and small at both ends and a rubber lining method thereof, comprising a ring baffle, an upper ring plate, a middle ring plate, a lower ring plate and a bottom plate which are sequentially connected from top to bottom through an angle connecting plate, nuts and bolts, and the gap between the ring baffle and the upper ring plate, the gap between the upper ring plate and the middle ring plate, the gap between the middle ring plate and the lower ring plate, and the gap between the lower ring plate and the bottom plate are 1 mm-3 mm. The invention has a simple structure and strong practicability.

Description

Technical Field

[0001] The present invention relates to the field of rubber lining for the rhombic barrel of a grinding machine, and in particular, to an integral rubber sizing die and its rubber lining method for the inside of a rhombic barrel of a grinding machine with a large inner opening and a small outer opening. Background Art

[0002] For a rhombic barrel of a grinding machine with a large middle and small ends (i.e., one end is sealed and the other end is open), also known as a grinding barrel, polyurethane rubber needs to be lined inside. Since the opening at the open end is small, after the mold is made, due to the limited thickness of the rubber lining, generally 1 cm - 2 cm, and the size of the grinding barrel is only 1 cm - 2 cm larger than the size of the mold, it cannot be directly taken out or put in. In this way, it is impossible to integrally line the grinding barrel with granular rubber; if lining flat rubber, the rubber solution can be covered and cured evenly on each surface for rubber lining. For this grinding barrel, there are many surfaces, so it needs to be repeated many times, and the process is very cumbersome. However, because it is used for grinding, the surface of the rubber needs to have particles, so this method cannot be used either.

[0003] In the prior art, there is also a method of split rubber lining. For example, in a Chinese invention patent with the patent number 201310112163.4 and the patent name "Grinding Machine", the rolling barrel includes a first barrel body, a second barrel body and a cover body. The workpiece and the abrasive are accommodated in the accommodation space formed by the first barrel body and the second barrel body, and are closed by the cover body installed on the second barrel body. The rolling barrel is in an octagonal olive shape, and the inner wall of the rolling barrel is lined with granular surface polyurethane. It uses the method of split processing of the first barrel body and the second barrel body for rubber lining, and then assembles the first barrel body and the second barrel body into a drum. In this way, there must be a gap in the middle of the barrel body, and there is a hidden danger in the sealing performance. At the same time, at the junction of the first barrel body and the second barrel body, there are high and low interfaces, which have a certain blockage during the grinding process of the workpiece at the bottom, hinder the fluidity of the workpiece, and increase the excessive wear of the polyurethane rubber, resulting in a shorter service life during long-term use.

[0004] There are many difficulties in the method of integrally lining granular rubber for a grinding barrel with a large middle and small ends in the prior art. Therefore, the applicant overcame these difficulties through experiments and invented a die and its method for integrally sizing granular rubber inside a rhombic barrel of a grinding machine with a large middle and small ends. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies of the prior art and at least solve the technical problems in the related technologies to a certain extent, and provide an integral rubber sizing die and its rubber lining method for the inside of a rhombic barrel of a grinding machine with a large middle and small ends, so as to achieve the best sealing performance of the rhombic barrel of the grinding machine.

[0006] To solve the above technical problems, the technical solution of the present invention is as follows: Inside the rhombic barrel of the grinding machine with a large middle and small ends, there is an integrated particle glue mold lining, which includes an annular baffle, an upper annular plate, a middle annular plate, a lower annular plate, and a bottom plate connected in sequence from top to bottom through angle connecting plates, nuts, and bolts. The gaps between the annular baffle and the upper annular plate, between the upper annular plate and the middle annular plate, between the middle annular plate and the lower annular plate, and between the lower annular plate and the bottom plate are 1 mm - 3 mm;

[0007] The upper annular plate includes a number of upper templates connected end to end in sequence to form a ring. Any two adjacent upper templates are fixed through angle connecting plates, nuts, and bolts, and the gap between any two connected upper templates is 1 mm - 3 mm;

[0008] The middle annular plate includes a number of middle templates connected end to end in sequence to form a ring. Any two adjacent middle templates are fixed through angle connecting plates, nuts, and bolts, and the gap between any two connected middle templates is 1 mm - 3 mm;

[0009] The lower annular plate includes a number of lower templates connected end to end in sequence to form a ring. Any two adjacent middle templates are fixed through angle connecting plates, nuts, and bolts, and the gap between any two connected lower templates is 1 mm - 3 mm;

[0010] Atomic putty is applied in the said gaps;

[0011] Grooves are distributed on the outer surfaces of the upper annular plate, the middle annular plate, and the lower annular plate;

[0012] It also includes a number of support plates for supporting the said mold;

[0013] It also includes an annular retaining ring buckled on the barrel mouth of the rhombic barrel of the grinding machine, and atomic putty is applied at the contact connection between the annular retaining ring and the rhombic barrel of the grinding machine.

[0014] Further, the angle connecting plate is an obtuse angle connecting plate.

[0015] Further, the said support plate is angled, with one end fixed to the said mold and the other end fixed to the rhombic barrel of the grinding machine.

[0016] Further, atomic putty is filled outside the said mold, and the nut is located outside the mold.

[0017] Further, the angle connecting plate and the bolt head are located inside the said mold.

[0018] Furthermore, the gaps between the annular baffle and the upper annular plate, between the upper annular plate and the middle annular plate, between the middle annular plate and the lower annular plate, between the lower annular plate and the bottom plate, between any two adjacent upper templates, between any two adjacent middle templates, and between any two adjacent lower templates are all 2 mm.

[0019] Furthermore, the annular baffle includes a connected vertical annular retaining ring and a transverse baffle. The transverse baffle is adapted to the upper annular plate and is in a regular polygonal shape. A through hole is provided in the middle of the transverse baffle.

[0020] Furthermore, positioning rods and a number of positioning columns are provided on the bottom plate. The positioning rods and the positioning columns are connected to the bottom plate by threads, and the number of positioning columns are evenly distributed around the positioning rods.

[0021] The disassembly and assembly method of the granular rubber lining inside the rhombic barrel of the center-large-and-two-ends-small grinding machine, characterized in that the specific steps are as follows:

[0022] a: Drawing, calculating the dimensions of the rhombic barrel of the grinding machine and the dimensions of the mold, and processing the plates required for each part of the mold and the plates required for each part of the rhombic barrel of the grinding machine;

[0023] b: Assembling the upper annular plate, the middle annular plate, and the lower annular plate through angle connecting plates, nuts, and bolts;

[0024] c: Assembling the annular baffle, the upper annular plate, the middle annular plate, the lower annular plate, and the bottom plate to the forming mold for standby through angle connecting plates, nuts, and bolts. Fill the atomic putty in each gap until the atomic putty cures, and weld the support plate to the annular baffle;

[0025] d: Unscrew the positioning rod to a preset position, perform center-to-center positioning with the bottom plate of the grinding barrel, then unscrew three positioning columns until they contact the bottom plate of the grinding barrel. Weld the plates of each part to the forming rhombic barrel of the grinding machine outside the forming mold. At this time, the other end of the support plate contacts the forming rhombic barrel of the grinding machine, the forming mold is suspended, and a forming cavity is formed between the forming mold and the forming rhombic barrel of the grinding machine. At this time, rotate the positioning columns until they are flush with the bottom plate;

[0026] e: Hoop an annular retaining ring around the periphery of the barrel opening of the forming rhombic barrel of the grinding machine, and use atomic putty to seal the contact connection between the annular retaining ring and the forming rhombic barrel of the grinding machine until the atomic putty cures. Pour the polyurethane glue from one side along the forming mold;

[0027] f: Send the forming rhombic barrel of the grinding machine in step e into the oven, heat it regularly, take it out and cool it to obtain the finished rhombic barrel of the grinding machine;

[0028] g: From top to bottom, reach into the through hole, loosen the bolts, remove the ring baffle, upper ring plate, middle ring plate, lower ring plate and bottom plate in turn, polish the barrel mouth with polyurethane, spray paint, and you will get the grinding barrel.

[0029] The technical effects of the present invention are mainly reflected in the following aspects: 1: Through the mold and the method, it is possible to achieve an integrated lining of particle rubber inside the prismatic barrel of the grinder that is larger in the middle and smaller at both ends, so that the sealing performance of the grinding barrel is improved to the best and the service life is greatly improved. 2: The present invention first processes the mold through each plate, uses putty for sealing, and processes the grinding barrel outside the mold, so that the entire mold is located inside the grinding barrel, and uses the support plate to cooperate with the positioning column to make the mold suspended in the air. After lining with rubber, each mold plate is removed from top to bottom in turn, thereby achieving the purpose of lining the inside of the prismatic barrel of the grinder that is larger in the middle and smaller at both ends with particle rubber. The reverse processing thinking is used for rubber lining, that is, the reverse thinking of making the mold first and then making the grinding barrel (rather than the thinking of making the grinding barrel first and then making the mold inside the grinding barrel, so that the mold cannot be installed). The internal rubber lining of the grinding barrel processed by reverse thinking is more beautiful and shows a curved curve. 3: The gap between the plates in the present invention is 2mm, which ensures the sealing performance of the putty and prevents the pressure generated between the plates during the high-temperature curing process of the glue liquid from causing the forces of mutual conflict between the plates, making it convenient to remove the mold plates. 4: First, use the positioning rod to perform centering positioning, then use the positioning column to support, which is convenient for the grinding barrel to process and shape, and finally use the support plate to suspend the mold in the grinding barrel. Before injecting glue, rotate the positioning column until the bottom plate a surface is flush, on the one hand, to form a molding cavity, and on the other hand, to relatively fix the mold and the grinding barrel to prevent the pressure at each point from being different during the high-temperature curing of the glue liquid, resulting in changes in the position of the mold and uneven thickness of the lining rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure in which the prismatic barrel of the grinding machine in the present invention is sleeved outside the mold;

[0031] Figure 2 It is a structural schematic diagram of the mold of the present invention;

[0032] Figure 3 for Figure 1 Schematic diagram of top view;

[0033] Figure 4 for Figure 2 A schematic diagram of the main view;

[0034] Figure 5 for Figure 3 A schematic cross-sectional view in the direction A-A1;

[0035] Figure 6 for Figure 5 Schematic diagram of the enlarged G part;

[0036] Figure 7 is Figure 4 a schematic cross-sectional view in the C-C1 direction;

[0037] Figure 8 is Figure 7 an enlarged schematic view of part X of

[0038] Figure 9 is Figure 4 a schematic cross-sectional view of another structure in the C-C1 direction;

[0039] Figure 10 is Figure 9 an enlarged schematic view of part Y of

[0040] Figure 11 is a schematic structural view of the rhombic barrel of the grinding machine;

[0041] Figure 12 is Figure 5 an enlarged schematic view of part Z of

[0042] Figure 13 is a schematic structural view of the bottom plate of the present invention;

[0043] Figure 14 is Figure 13 a front view schematic of

[0044] Figure 15 is Figure 5 an enlarged schematic view of part D of Detailed implementation manners

[0045] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention so that the technical solutions of the present invention are easier to understand and master, and should not be construed as a limitation to the present invention.

[0046] Such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 11As shown in the figure: The inner integrated lining particle glue mold of the rhombic barrel of the grinder with a large middle and small ends includes an annular baffle 4, an upper annular plate 5, a middle annular plate 6, a lower annular plate 7, and a bottom plate 8 that are sequentially connected from top to bottom through an angle connecting plate 1, a nut 2, and a bolt 3. The upper annular plate 5 includes 8 upper templates 51 that are sequentially connected end to end to form a ring. The upper template 51 is a first trapezoidal plate, and any two adjacent upper templates 51 are fixed through an angle connecting plate 1, a nut 2, and a bolt 3. The middle annular plate 6 includes 8 middle templates 61 that are sequentially connected end to end to form a ring. The middle template 61 is a square plate, and any two adjacent middle templates 61 are fixed through an angle connecting plate 1, a nut 2, and a bolt 3. The lower annular plate 7 includes 8 lower templates that are sequentially connected end to end to form a ring. The lower template is a second trapezoidal plate, and any two adjacent middle templates 61 are fixed through an angle connecting plate 1, a nut 2, and a bolt 3. The bottom side of the first trapezoidal plate, the width of the square plate, and the bottom side of the second trapezoidal plate are the same. Through the above design, a mold with one less circle than the rhombic barrel of the grinder is made. A forming cavity for polyurethane glue is formed between the rhombic barrel of the grinder and the mold. Approximately hemispherical grooves are distributed on the outer surface of the upper annular plate 5, the outer surface of the middle annular plate 6, and the outer surface of the lower annular plate 7. Therefore, after lining with glue, convex point particles in the shape of approximately hemispherical are formed on the glue surface. The annular baffle 4 includes a vertical annular retaining ring 41 and a horizontal baffle 42 that are connected. The horizontal baffle 42 is adapted to the upper annular plate 5 and is in the shape of a regular octagon. The purpose is to prevent too large a gap between the annular baffle 4 and the upper annular plate 5 and also to provide a position for the angle connecting plate 1 to be installed. A through hole 421 is provided in the middle of the horizontal baffle 42. The through hole 421 facilitates the disassembly and assembly of the angle connecting plate 1 and allows the hand to reach into the bottom plate 8 through the through hole to rotate the positioning rod and the positioning column.

[0047] As Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown in the figure: The gap between the annular baffle 4 and the upper annular plate 5, the gap h between the upper annular plate 5 and the middle annular plate 6, the gap between the middle annular plate 6 and the lower annular plate 7, and the gap between the lower annular plate 7 and the bottom plate 8 are 2 mm. The gap between any two adjacent upper templates 51 is 2 mm. The gap between any two adjacent middle templates 61 is 2 mm. The gap j between any two adjacent lower templates is 2 mm. The above gaps are filled with putty 11. The putty 11 is used to seal the above gaps. Through experiments, if the above gaps are set to be less than 1 mm, because the liquid glue in the forming cavity generates pressure on the mold after curing, as Figure 9 and Figure 10As shown in the figure: Finally, there is no gap between the plates in the mold, and the plates are in contact with each other, with a pulling force between them. The upper templates 51 in the mold are in contact with each other, the middle templates 61 are in contact with each other, and the lower templates are in contact with each other, making it impossible to disassemble. Then, when demolding, it is not easy to remove the plates in the mold. If the above-mentioned gap is set to be greater than 3 mm, the sealing effect of the putty 11 will be greatly reduced. During the curing process of the glue, the putty 11 will be directly cracked, resulting in the failure of rubber lining and further leading to the scrapping of the grinding barrel.

[0048] As Figure 1 and Figure 5 shown in the figure: It also includes several support plates 9 for supporting the mold. The support plates 9 are angular, with one end welded and fixed to the mold and the other end welded and fixed to the outer wall of the rhombic barrel of the grinding machine. In this way, the mold is suspended, and a forming cavity is formed between the mold and the rhombic barrel of the grinding machine.

[0049] As Figure 5 and Figure 15 shown in the figure: It also includes an annular retaining ring 10 hoop on the mouth of the rhombic barrel of the grinding machine. The purpose of the vertical ring retaining ring 41 and the annular retaining ring 10 is to line the mouth of the rhombic barrel of the grinding machine with rubber. The annular retaining ring 10 adopts the structure of an existing hoop or clamp. The contact connection between the annular retaining ring 10 and the rhombic barrel of the grinding machine is coated with putty 11 to seal the contact connection between the annular retaining ring 10 and the outer surface of the rhombic barrel of the grinding machine.

[0050] As Figure 5 shown in the figure: The angle connecting plate 1 is an obtuse angle connecting plate, that is, two flat plates are welded into an obtuse angle or a single plate is integrally processed into an obtuse angle connecting plate. Bolt holes are provided on the flat plate, and fixing holes are provided at corresponding positions on each plate of the mold for passing through the bolts 3.

[0051] As Figure 6 , Figure 8 and Figure 10 shown in the figure: The putty 11 is filled in from the outside of the mold, and the surface is filled into a chamfer, generating an arc surface at the connection of each mold plate to make the rubber lining more beautiful.

[0052] As Figure 5 shown in the figure: The angle connecting plate 1 and the head of the bolt 3 are located inside the mold. On the one hand, it is convenient to disassemble the plates in the mold. On the other hand, it makes the rubber lining more beautiful. The nut 2 is located outside the mold. After the polyurethane glue hardens, it wraps the nut 2, which is equivalent to fixing the nut 2. Then, it is convenient to loosen the screw and pry off the nut later.

[0053] As Figure 12 , Figure 13 and Figure 14As shown in the figure: on the bottom plate 8, there are a positioning rod 801 and several positioning columns 802. The positioning rod 801 and the positioning columns 802 are connected to the bottom plate 8 by threads. The several positioning columns 802 are evenly distributed around the positioning rod 801. Since a hole 001 needs to be opened at the bottom of the grinding barrel, and the hole 001 is used for water passing during the grinding process, the end of the positioning rod 801 is slightly larger than the hole 001. Through the above, when processing the grinding barrel, first use the positioning rod 801 to center and position the grinding barrel with the mold, and then rotate the three positioning columns 802 to extend out until they touch the grinding barrel body. In this way, during the process of processing the grinding barrel, the mold will not tip over. Similarly, the three positioning columns 802 also have the function of adjusting the horizontal height of the mold, which is convenient for the subsequent welding of the support plate 9. After the welding of the support plate 9, rotate the positioning column 802 until it is flush with the bottom plate ( Figure 14 the surface indicated by a in the figure).

[0054] Disassembly and assembly method of the inner integrated lining particle glue of the rhombic barrel of the grinding machine with large middle and small ends at both ends. The specific steps are as follows:

[0055] a: Draw a drawing, calculate the dimensions of the rhombic barrel of the grinding machine and the dimensions of the mold, and process the plates required for each part of the mold and the plates required for each part of the rhombic barrel of the grinding machine;

[0056] b: Assemble the upper annular plate 5, the middle annular plate 6 and the lower annular plate 7 through the angle connecting plate 1, the nut 2 and the bolt 3;

[0057] c: Assemble the ring baffle 4, the upper annular plate 5, the middle annular plate 6, the lower annular plate 7 and the bottom plate 8 through the angle connecting plate 1, the nut 2 and the bolt 3 to form a spare forming mold. Fill the atomic ash 11 in each gap until the atomic ash 11 cures, and weld the support plate 9 and the ring baffle 4;

[0058] d: Screw out the positioning rod to a preset position, perform center alignment positioning with the bottom plate of the grinding barrel, and then screw out the three positioning columns until they touch the bottom plate of the grinding barrel. Weld the plates of each part outside the forming mold to form the rhombic barrel of the grinding machine. At this time, the other end of the support plate 9 touches the formed rhombic barrel of the grinding machine and rotates the mold to adjust the direction and perform spot welding. The forming mold is suspended, and a forming cavity is formed between the forming mold and the formed rhombic barrel of the grinding machine. At this time, rotate the positioning column 802 until it is flush with the bottom plate ( Figure 14 the surface indicated by a in the figure).

[0059] e: Hoop a ring-shaped retaining ring 10 around the outer periphery of the barrel mouth of the formed rhombic barrel of the grinding machine, and use atomic ash 11 to seal the contact joint D between the ring-shaped retaining ring 10 and the formed rhombic barrel of the grinding machine until the atomic ash 11 cures. Pour the polyurethane glue solution from one side along the forming mold. The purpose is to prevent the phenomenon of air bubbles in the lining rubber;

[0060] f: Feed the rhombic barrel of the forming and grinding machine in step e into an oven, heat it at a fixed time, and then take it out for cooling to obtain the finished rhombic barrel of the grinding machine;

[0061] g: Pry open the spot-welded part between the support plate 9 and the rhombic barrel of the forming and grinding machine, insert the hand into the through hole 421, loosen the bolt 3 from top to bottom, and sequentially remove the ring baffle 4, the upper annular plate 5, the middle annular plate 6, the lower annular plate 7 and the bottom plate 8, polish the polyurethane at the barrel opening, and paint it to obtain the grinding barrel.

[0062] Certainly, the above are only typical examples of the present invention. In addition, the present invention can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. An integrated lining particle glue mold inside the rhombic barrel of a middle-large-and-two-ends-small grinding machine, Characterized in that: It includes an annular baffle, an upper annular plate, a middle annular plate, a lower annular plate and a bottom plate connected in sequence from top to bottom through angle connecting plates, nuts and bolts. The gaps between the annular baffle and the upper annular plate, between the upper annular plate and the middle annular plate, between the middle annular plate and the lower annular plate, and between the lower annular plate and the bottom plate are 1 mm to 3 mm; The upper annular plate includes a number of upper templates connected end to end in sequence to form a ring. Any two adjacent upper templates are fixed through angle connecting plates, nuts and bolts, and the gap between any two connected upper templates is 1 mm to 3 mm; The middle annular plate includes a number of middle templates connected end to end in sequence to form a ring. Any two adjacent middle templates are fixed through angle connecting plates, nuts and bolts, and the gap between any two connected middle templates is 1 mm to 3 mm; The lower annular plate includes a number of lower templates connected end to end in sequence to form a ring. Any two adjacent lower templates are fixed through angle connecting plates, nuts and bolts, and the gap between any two connected lower templates is 1 mm to 3 mm; The gaps are filled with putty; The outer surfaces of the upper annular plate, the middle annular plate and the lower annular plate are distributed with grooves; It also includes a number of support plates for supporting the mold; It also includes an annular retaining ring buckled on the barrel mouth of the rhombic barrel of the grinding machine. The contact connection part between the annular retaining ring and the rhombic barrel of the grinding machine is coated with putty; The bottom plate is provided with a positioning rod and a number of positioning columns. The positioning rod and the positioning columns are threadedly connected to the bottom plate, and the number of positioning columns is evenly distributed around the positioning rod.

2. The integrated lining particle glue mold inside the rhombic barrel of a middle-large-and-two-ends-small grinding machine according to claim 1, Characterized in that: The angle connecting plate is an obtuse angle connecting plate.

3. The integrated lining particle glue mold inside the rhombic barrel of a middle-large-and-two-ends-small grinding machine according to claim 1, Characterized in that: The support plate is angular, one end is fixed to the mold, and the other end is fixed to the rhombic barrel of the grinding machine.

4. The integrated lining particle glue mold inside the rhombic barrel of a middle-large-and-two-ends-small grinding machine according to claim 1, Characterized in that: The putty is filled outside the mold.

5. The integrated lining particle glue mold inside the rhombic barrel of a middle-large-and-two-ends-small grinding machine according to claim 1, Characterized in that: The angle connecting plate and the bolt head are located inside the mold, and the nut is located outside the mold.

6. The integrated lining particle glue mold inside the rhombic barrel of a middle-large-and-two-ends-small grinding machine according to claim 1, Characterized in that: The gaps between the annular baffle and the upper annular plate, between the upper annular plate and the middle annular plate, between the middle annular plate and the lower annular plate, between the lower annular plate and the bottom plate, between any two connected upper templates, between any two connected middle templates, and between any two connected lower templates are all 2 mm.

7. The integrated lining particle glue mold inside the rhombic barrel of a middle-large-and-two-ends-small grinding machine according to claim 1, Characterized in that: The annular baffle includes a vertically connected annular retaining ring and a transverse baffle. The transverse baffle is adapted to the upper annular plate and is in a regular polygonal shape. A through hole is provided in the middle of the transverse baffle.

8. A method for disassembling and assembling the integrally lined granular rubber inside the rhombic barrel of a center-large-and-two-ends-small grinding machine applicable to any one of claims 1-7, characterized in that: The specific steps are as follows in sequence: a: Drawing, calculating the dimensions of the rhombic barrel of the grinding machine and the dimensions of the mold, and processing the plates required for each part of the mold and the plates required for each part of the rhombic barrel of the grinding machine; b: Assembling the upper annular plate, the middle annular plate and the lower annular plate through angle connecting plates, nuts and bolts; c: Assembling the annular baffle, the upper annular plate, the middle annular plate, the lower annular plate and the bottom plate to the forming die for standby through angle connecting plates, nuts and bolts. Fill the atomic putty in each gap until the atomic putty cures, and weld the support plate to the annular baffle; d: Screw out the positioning rod to a preset position, perform center-to-center positioning with the bottom plate of the grinding barrel, then screw out the three positioning posts until they contact the bottom plate of the grinding barrel. Weld the plates at each part outside the forming die to form the rhombic barrel of the forming grinding machine. At this time, the other end of the support plate is fixed on the rhombic barrel of the forming grinding machine, and the forming die is suspended. A forming cavity is formed between the forming die and the rhombic barrel of the forming grinding machine. At this time, rotate the positioning posts until they are flush with the bottom plate; e: Hoop an annular retaining ring around the periphery of the barrel mouth of the rhombic barrel of the forming grinding machine, and use atomic putty to seal the contact joint between the annular retaining ring and the rhombic barrel of the forming grinding machine until the atomic putty cures. Pour the polyurethane glue from one side along the forming die; f: Send the rhombic barrel of the forming grinding machine in step e into the oven, heat it regularly, take it out and cool it to obtain the finished rhombic barrel of the grinding machine; g: Reach into the through hole from top to bottom, loosen the bolts, and sequentially remove the annular baffle, the upper annular plate, the middle annular plate, the lower annular plate and the bottom plate. Grind the polyurethane at the barrel mouth and spray paint to obtain the grinding barrel.

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