CN107363205B - Forging forming module for body forgings of flange ball valves with handles - Google Patents

Abstract

The invention discloses a forging forming module of a valve body forging piece of a flange ball valve with a handle, which comprises a blank making die and a final forging die; the blank making die comprises a blank making upper male die, a blank making lower female die, a material ejecting rod and a backing plate; the final forging die comprises a final forging upper male die, a final forging lower male die, a die holder, a left half die and a right half die; after the left half die and the right half die are oppositely moved and folded, the finish forging upper male die moves downwards, and the finish forging lower male die moves upwards, so that the valve body forging piece of the flange ball valve with the handle is finally formed, the left flange is formed by the finish forging upper male die, the left half die and the right half die, the right flange and the handle flange are formed by the left half die and the right half die, and the middle cavity is formed by the finish forging lower male die. The blank making die and the final forging die are combined, and the middle die cavity is directly forged without subsequent machining; a closed mold is adopted, so that no flash is generated; saving materials, reducing working procedures, reducing manufacturing cost and improving production efficiency.

Description

Forging forming module for body forgings of flange ball valves with handles

Technical field

The invention relates to a metal plastic forming process in the field of material processing technology, and in particular to a forging forming module for a body forging of a flange ball valve with a handle.

Background technique

The body forging of the ball valve with handle flange shown in Figure 1 and Figure 2 is mainly composed of left flange a, right flange b, middle cavity c and handle flange d. The middle cavity c is close to the left flange a, and the handle flange d is located directly above the middle cavity c. Due to the traditional forging method, the intermediate cavity c cannot be forged. In order to save costs, such valve body blanks are basically manufactured by casting methods.

If the body of the flange ball valve with handle is formed by traditional forging, the process flow is: blanking → heating → billet making (material separation) → thick right flange → pre-forging (pre-forming) → final forging and forming → cutting side, a total of 7 processes. The main problems are:

(1) The middle cavity cannot be forged and requires mechanical processing, which results in high manufacturing costs;

(2) Using open forging, the blank has flash edges and needs to be trimmed;

(3) Material waste is serious, and the intermediate cavity formed by mechanical processing and the cut off flash become waste;

Contents of the invention

The present invention improves the above technical problems and provides a forging forming module for flange ball valve body forgings with handles, which reduces the number of processes, produces no flash, has high utilization of parts and materials, high production efficiency and low manufacturing cost.

To this end, the invention provides a forging forming module for a flange ball valve body forging with a handle. The flange ball valve body forging with a handle includes a left flange, a right flange, a middle cavity and a handle flange. The middle cavity is close to the left flange, and the handle flange is located directly above the middle cavity. The forging forming die set includes a blank making die and a final forging die;

The blank making mold includes an upper blank making punch, a lower blank making concave mold, an ejector rod and a backing plate; the blank making upper punch includes a top plate mounting plate, a middle column and a tapered bottom, and the middle column includes a cylinder. and a small column extending laterally on the outer wall of the cylinder, and the bottom surface of the cylinder and the small column is flush; the inner cavity of the lower blank mold is divided into an upper part of the cavity and a lower part of the cavity, and the upper part of the cavity has a cross section with the middle column The bottom surface matches, the height of the upper part of the cavity is greater than the height of the tapered bottom, the lower part of the cavity is a cylindrical hole, and the cylinder, tapered bottom, and cylindrical hole are coaxially arranged, and the cross section of the cylinder, cylindrical hole, tapered bottom, and small column The area decreases successively; the backing plate is located at the bottom of the inner cavity of the lower die for blanking, the ejector rod passes through the lower die from bottom to top and rests on the backing plate, and the upper punch moves toward the lower die for blanking until The bottom surface of the middle column is flush with the top surface of the inner cavity of the lower blank-making die to achieve mold closing. After the workpiece is formed, the upper blank-making punch moves upward, and the ejector rod pushes the backing plate and drives the workpiece to move upward to achieve demolding;

The final forging die includes an upper final forging punch, a lower final forging punch, a die base, a left half mold and a right half die. The final forging die is symmetrical as a whole, and the lower final forging punch passes through the die base from bottom to top. Stretching into the cavity surrounded by the left half mold and the right half mold; after the left half mold and the right half mold move toward each other and close, the final forging upper punch moves downward, and the final forging lower punch moves upward, finally forming For the body forging of a ball valve with handle flange, the left flange is formed by the final forging upper die, left half mold and right half mold, the right flange and handle flange are formed by the left half mold and right half mold, and the middle cavity is formed by the final forging die. After the lower forging punch is formed and the workpiece is formed, the final forging upper punch and the final forging lower punch return to their initial positions at the same time, and the left and right half molds return to their initial positions.

The beneficial effects of the present invention: combined with the blank making die and the final forging die, the intermediate cavity is directly forged without subsequent mechanical processing; a closed mold is used, and no flash is produced; taking the product in Figure 1 as an example, the traditional forging forming method is used The unloading weight is 8.9Kg, and the unloading weight of this method is 6.01Kg. In comparison, this method saves up to 32.4% of materials compared with the traditional method, reduces processes, reduces manufacturing costs, and improves production efficiency.

Description of the drawings

Figure 1 is a schematic structural diagram of the valve body of the flange ball valve with handle.

Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1 .

Figure 3 is a state before clamping the blank forming mold of the forging forming die set of the present invention.

Fig. 4 shows the state of the workpiece after the blank forming die of the forging forming die set of the present invention is clamped.

Figure 5 is a state before the final forging die of the forging forming die set of the present invention is closed.

Figure 6 is a state after the left half mold and the right half mold of the final forging die of the forging forming die set of the present invention are closed.

Figure 7 shows the state of the workpiece formed by the final forging die of the forging forming die set of the present invention.

Figure 8 is a process flow chart for forming the body forging of a flange ball valve with handle using the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and examples:

The body forging of the ball valve with handle flange shown in Figure 1 and Figure 2 is mainly composed of left flange a, right flange b, middle cavity c and handle flange d. The middle cavity c is close to the left flange a, and the handle flange d is located directly above the middle cavity c. The middle cavity of the forging needs to be completed during forging.

First, a forging forming die set needs to be made, including a blank making die and a final forging die.

As shown in Figures 3 and 4, the blank making mold mainly consists of an upper blank making punch 1, a lower blank making concave mold 2, an ejector rod 3 and a backing plate 4.

The upper punch 1 for blank making includes a top mounting plate 1a, a middle column and a tapered bottom 1c, which are integrally formed. The top mounting plate 1a is used to connect with the power part, and the power part drives the upper punch 1 for blank making to move up and down. The middle column includes a cylinder 1b and a small column 1d extending laterally on the outer wall of the cylinder 1b, and the cylinder 1b is flush with the bottom surface of the small column 1d. The bottom surface of the cylinder 1b and the small column 1d matches the upper surface of the preformed workpiece with the prototype of the handle flange. The tapered bottom 1c is used for the intermediate cavity of the preformed workpiece.

The inner cavity of the lower blank mold 2 is divided into an upper cavity 2a and a lower cavity 2b. The cross section of the upper cavity 2a matches the bottom surface of the middle column and is used to preform the workpiece with a handle flange prototype. The height of the upper part of the cavity 2a is greater than the height of the tapered bottom 1c. The lower part of the cavity 2b is a cylindrical hole, and the cylinder 1b, the tapered bottom 1c, and the cylindrical hole are coaxially arranged. The cylinder 1b, the cylindrical hole, the tapered bottom 1c, and the small column The cross-sectional area of 1d decreases successively. The backing plate 4 is located at the bottom of the inner cavity of the lower blanking die 2. The ejector rod 3 passes through the lower concave mold 2 from bottom to top and is pressed against the backing plate 4. The upper blanking punch 1 moves toward the lower blanking die 2. Until the bottom surface of the middle column is flush with the top surface of the inner cavity of the lower blanking die 2, the mold is closed. After the workpiece is formed, the upper blanking punch 1 moves upward, and the ejector rod 3 pushes the backing plate 4 and drives the workpiece to move upward. Achieve demoulding.

As shown in Figures 5 to 7, the final forging die mainly consists of the final forging upper punch 5, the final forging lower punch 6, the die base 7, the left half die 8 and the right half die 9. The final forging die is symmetrical as a whole. The final forging lower punch 6 is rod-shaped, passing through the die base 7 from bottom to top and extending into the cavity surrounded by the left half mold 8 and the right half mold 9. After the left half mold 8 and the right half mold 9 move toward each other and close together, the final forging upper punch 5 moves downward and the lower final forging punch 6 moves upward, finally forming the flange ball valve body forging with handle.

The left flange a is formed by the final forging upper punch 5, the left half mold 8 and the right half mold 9, the right flange b and the handle flange d are formed by the left half mold 8 and the right half mold 9, the middle cavity c is formed by the final forging After the lower forging punch 6 is formed and the workpiece is formed, the final forging upper punch 5 and the final forging lower punch 6 return to their initial positions at the same time, and then the left half mold 8 and the right half mold 9 return to their initial positions.

Preferably, the top of the die base 7 of the final forging die is also provided with a cushion block 10 .

As shown in Figure 8, a forging method for body forgings of flange ball valves with handles includes the following process steps:

The first step: Make the mold, including the blank mold and the final forging mold.

Step 2: Cut the material and press the material specifications.

Step 3: Heating, put the bar that has been cut according to specifications into the heating furnace, heat it to the initial forging temperature and then release it from the furnace.

Step 4: Preparing the billet, put the bar being baked into the lower billet-making concave die 2 of the billet-making mold, and the upper billet-making punch 1 moves toward the lower billet-making concave mold 2 until the bottom surface of the middle column is in contact with the lower billet-making die. The top surface of the inner cavity of the concave mold 2 is flush to achieve mold closing. After pressing the bar into the shape of the blank, the upper punch 1 moves upward and returns to the initial position. The ejector rod 3 moves upward, pushing the backing plate 4 and driving the The workpiece moves upward, ejects the workpiece from the lower die, and takes out the workpiece to complete a working cycle.

Step 5: Material separation, also known as waist pinching, puts the workpiece into two semi-circular calipers with its axis horizontally, and rotates the workpiece to complete material separation, that is, pinch the waist of the workpiece to make the workpiece The material in the left and right parts is evenly distributed, so that the material can fill the entire cavity during final forging. Waist pinching is a common process in forging forming, which will not be described in detail here. This step is also included in the forging forming process of traditional flange ball valve body forgings with handles.

Step 6: Final forging is formed. Place the divided workpiece on the final forging lower punch 6 of the final forging die. The left and right mold clamping cylinders of the die forging hydraulic press move toward the middle, driving the left half mold 8 and the right half mold 9. They move in opposite directions to close, and the closed left and right half molds are locked. After that, while the main cylinder of the die forging hydraulic press drives the final forging upper punch 5 to move downward, the lower cylinder of the die forging hydraulic press drives the final forging lower punch 6 to move upward, finally forming the flange ball valve body forging with handle, left flange a It is formed by the final forging upper punch 5, the left half die 8 and the right half die 9. The right flange b and the handle flange d are formed by the left half die 8 and the right half die 9. The middle cavity c is formed by the final forging lower punch. 6 forming, after the workpiece is formed, first the final forging upper punch 5 and the final forging lower punch 6 return to the initial position at the same time, then the left half mold 8 and the right half mold 9 return to the initial position, and finally the workpiece is taken out to complete a Work cycle.

Claims (2)

1. A forging forming module for a flange ball valve body forging with a handle. The flange ball valve body forging with a handle includes a left flange (a), a right flange (b), a middle cavity (c) and The handle flange (d), the middle cavity (c) is close to the left flange (a), the handle flange (d) is located directly above the middle cavity (c), and is characterized by: the forging forming die The group includes blanking dies and final forging dies; The blank making mold includes an upper blank making punch (1), a lower blank making concave mold (2), an ejector rod (3) and a backing plate (4); the blank making upper punch (1) includes a top plate installation The plate (1a), the middle column and the tapered bottom (1c), the middle column includes a cylinder (1b) and a small column (1d) extending laterally on the outer wall of the cylinder (1b), and the cylinder (1b) and the small column (1d) The bottom surface of 1d) is flush; the inner cavity of the lower blank mold (2) is divided into an upper part of the cavity (2a) and a lower part of the cavity (2b), and the cross section of the upper part of the cavity (2a) is consistent with the bottom surface of the middle column Matching, the height of the upper part of the cavity (2a) is greater than the height of the tapered bottom (1c), the lower part of the cavity (2b) is a cylindrical hole, and the cylinder (1b), the tapered bottom (1c), and the cylindrical hole are coaxially arranged, and the cylinder The cross-sectional areas of (1b), cylindrical hole, conical bottom (1c), and small column (1d) decrease in sequence; the backing plate (4) is located at the bottom of the inner cavity of the lower blank mold (2), and the ejector rod (3) Pass through the lower blank-making die (2) from bottom to top and rest on the backing plate (4). The upper blank-making punch (1) moves toward the lower blank-making die (2) until the bottom surface of the middle column is in contact with the base plate (4). The top surface of the inner cavity of the lower blank-making die (2) is flush to achieve mold closing. After the workpiece is formed, the upper blank-making punch (1) moves upward, and the ejector rod (3) pushes the backing plate (4) and drives the workpiece upward. Movement to achieve demoulding; The final forging die includes an upper final forging punch (5), a lower final forging punch (6), a die base (7), a left half die (8) and a right half die (9). The final forging die is symmetrical as a whole. , the final forging lower punch (6) extends from bottom to top through the die base (7) into the cavity surrounded by the left half mold (8) and the right half mold (9); the left half mold (8) After moving together with the right half mold (9), the final forging upper punch (5) moves downward, and the final forging lower punch (6) moves upward, finally forming the flange ball valve body forging with handle, left method The flange (a) is formed by the final forging upper punch (5), the left half mold (8) and the right half mold (9). The right flange (b) and the handle flange (d) are formed by the left half mold (8) and the right half mold (9). The right half mold (9) is formed, and the middle cavity (c) is formed by the final forging lower punch (6). After the workpiece is formed, the final forging upper punch (5) and the final forging lower punch (6) return to the initial state at the same time. After the position, the left half mold (8) and the right half mold (9) return to the initial position. 2. The forging mold set for body forgings of flange ball valves with handles according to claim 1, characterized in that: the top of the die base (7) of the final forging die is also provided with a cushion block (10).