CN210817234U - Auxiliary combined core rod for forging step inner hole cylinder type forge piece - Google Patents
Auxiliary combined core rod for forging step inner hole cylinder type forge piece Download PDFInfo
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- CN210817234U CN210817234U CN201921392273.XU CN201921392273U CN210817234U CN 210817234 U CN210817234 U CN 210817234U CN 201921392273 U CN201921392273 U CN 201921392273U CN 210817234 U CN210817234 U CN 210817234U
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Abstract
The utility model discloses an auxiliary combined core rod for forging a step inner hole cylinder type forge piece, which comprises a first core rod and a combined core rod which are matched, wherein the first core rod is structurally characterized by comprising a first step and a first cone which are integrally processed; the combined core rod is fixed into a whole by the second core rod and the conical support through spot welding; the second core rod comprises a step II, a cylinder and a cone II which are integrally processed, and a cone main body of the conical support is provided with a taper hole along the axial direction. The utility model discloses a frock, simple structure, convenient operation, the drawing requirement can be guaranteed to the finished product not only overall dimension of gained forging, has practiced thrift material and machining expense moreover greatly to guarantee that the inside streamline of forging is not cut off, increased forging life, strengthened the market competition of this type of forging.
Description
Technical Field
The utility model belongs to the technical field of freely forge, a forged supplementary combination plug of step hole section of thick bamboo class forging is related to.
Background
In free forging production, a large number of cylinder forgings, such as various pressure vessels, cylinder bodies and the like, are produced, wherein the cylinder forgings with inner holes in the steps are designed into straight holes generally in a free forging process because inner hole steps are difficult to forge out in the actual forging process, and the weight of the forgings is increased due to the fact that extra forging blocks are needed; and because the shape of the forging is limited, the subsequent processing working hours are large, and the streamline of the forging is cut off during processing, thereby having certain influence on the service life of the part.
Therefore, a new forging tool and a matching method are urgently needed to be developed, so that the step part of the inner hole can be forged out by the step inner hole cylinder type forge piece, the weight of the forge piece and the machining working hour are reduced, the inner streamline of the forge piece can be ensured, and the service life of the forge piece is prolonged.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an auxiliary combined core rod for forging a step inner hole cylinder type forge piece, which solves the problem that no proper auxiliary tool is available in the prior art, the step inner hole is generally designed into a straight hole in a free forging process, and the weight of the forge piece is increased due to the fact that excessive forging blocks are needed to be additionally arranged; and because the shape of the forging is limited, the subsequent processing working hours are large, the streamline of the forging is easily cut off during processing, and the service life of parts is influenced.
The technical proposal adopted by the utility model is that an auxiliary combined core rod for forging step inner hole cylinder forgings comprises a core rod I and a combined core rod which are matched,
the structure of the first core rod is that the first core rod comprises a step I and a cone I which are integrally processed;
the combined core rod is fixed into a whole by the second core rod and the conical support through spot welding; the second core rod comprises a step II, a cylinder and a cone II which are integrally processed, and a cone main body of the conical support is provided with a taper hole along the axial direction.
The utility model discloses an auxiliary combined core rod for forging step inner hole cylinder forgings, which is also characterized in that,
the conicity of the first cone and the conicity of the second cone are both 1: 100.
The taper of the outer surface of the conical main body of the conical support is 1: 100.
The diameter of the cylinder is larger than that of the second cylindrical step.
The conical surface angle of the conical support (5) is 30-45 degrees.
The utility model has the advantages of simple structure and convenient use, realizes forging step inner hole cylinder forgings on free forging equipment, ensures the inner flow line of the forgings and prolongs the service life of the forgings; and the weight of the forging is reduced, the cost of the forging is reduced, and the market competitiveness is improved.
Drawings
FIG. 1 is a front view of the stepped inner bore cylindrical forging (blank) to be machined according to the present invention;
FIG. 2 is a left side view of the stepped inner bore tube forging (blank) to be machined according to the present invention;
fig. 3 is a schematic cross-sectional structure view of a first core rod of the present invention;
FIG. 4 is a schematic cross-sectional view of a mandrel of the present invention;
FIG. 5 is a schematic structural view of a conical support of the present invention;
FIG. 6 is a left side view of FIG. 5;
fig. 7 is a schematic structural view of the combined mandrel of the present invention;
FIG. 8 is a schematic view of the structure of the blank after completion of the first fire;
FIG. 9 is a schematic view of the mandrel of the present invention after being pulled out for a second fire;
fig. 10 is a schematic structural view of the drawing and forming of the combined mandrel of the present invention by the third fire.
In the figure, 1, a forging, 2, a blank, 3, a first core rod, 4, a second core rod, 5, a conical support, 6, a combined core rod, 7, a flat anvil and 8, a V-shaped anvil are arranged; 31. the first step, 32, the first cone, 41, the second step, 42, the cylinder and 43, the second cone.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings.
Referring to fig. 1 and 2, the present invention is a finished structure of a forged object (forged piece 1), and the forged piece 1 is a typical stepped inner hole cylinder shape.
Forging 1 of this kind of step hole section of thick bamboo class shape needs to adopt at the forging in-process the utility model discloses two solitary frock parts, plug 3 (see figure 3) and combination plug 6 (see figure 7) promptly together are called (step hole section of thick bamboo class forging) supplementary combination plug.
Referring to fig. 3, the mandrel bar 3 has a structure including two integrally formed parts, i.e., a step one 31 and a cone one 32 (taper 1:100), and the cylindrical step one 31 is used for holding by a drawing manipulator.
Referring to fig. 4, 5, 6, and 7, the combined mandrel 6 is fixed integrally by the second mandrel 4 and the tapered support 5 by spot welding; the second core rod 4 comprises three integrally processed parts, namely a second step 41, a cylinder 42 and a second cone 43 (the taper is 1:100), the diameter of the cylinder 42 is obviously larger than that of the second cylindrical step 41, and the second cylindrical step 41 is also used for clamping by an operation machine during drawing; a conical hole is formed in the conical main body of the conical support 5 along the axial direction (the taper of the outer surface of the conical main body is 1: 100); the inner hole of the conical support 5 is sleeved on the second cone 43, and the large-diameter end face of the conical support 5 is tightly attached to the end face of the cylinder 42 and firmly fixed through spot welding.
Utilize the utility model discloses foretell two kinds of frocks and other relevant equipment carry out the free forging of step hole section of thick bamboo class forging, implement according to the step of following three fire number:
a first fire: a blank 2 is manufactured and then a blank is manufactured,
the raw material steel ingot is processed by chamfering, chopping and blanking, upsetting, rounding and flattening and punching an inner hole in sequence to obtain a blank 2 in a cylindrical ring shape, which is shown in figure 8;
and (3) second fire: the blank 2 is drawn out to be long,
the first mandrel 3 penetrates through the inner hole of the blank 2, so that a forging manipulator (the forging manipulator is auxiliary forging equipment, and the operations such as blank clamping, feeding, rotation and the like are controlled by an operating system) is used for firmly clamping a step one 31 of the first mandrel 3, the blank 2 is drawn out to a process required size by utilizing a conical cone one 32 of the first mandrel 3, a prototype forging 1 is obtained, and a section of protruding part appears on the outer circle of the forging 1, as shown in figure 9; the convex part on the excircle of the forging 1 is used as a transition section for closing a hole in the step part of the inner hole of the third fire number, and then the first core rod 3 is taken away;
and (3) third fire: the finishing of the forging 1 is carried out,
sleeving the combined core rod 6 in the inner hole of the prototype forging 1 again, so that the forging manipulator firmly clamps the second step 41 on the second core rod 4, and the combined core rod 6 plays a role in fixing the forging 1; placing the convex part of the blank 2 obtained by the second firing in the V-shaped anvil 8, controlling the reciprocating downward pressing motion of the flat anvil 7 (the V-shaped anvil 8 is fixed on the feeding table and used in cooperation with the flat anvil 7), simultaneously combining the rotary motion of the core rod 6, closing the hole of the convex part of the blank 2 obtained by the second firing to the size requirement of the forging, and finishing the forming through an initial stage and a finishing stage to obtain the forging 1 (finished product) formed by the inner hole of the step, wherein the size requirement of the forging is met, and the figure is 10.
Examples
Utilize the utility model discloses carry out the free forging of step hole section of thick bamboo class forging, concrete step is:
the preparation method comprises the following steps: according to the forging process for manufacturing the step inner hole cylinder type forgings with different specifications, selecting a first core rod 3 and a second core rod 4 with corresponding sizes according to the size of a forging drawing and manufacturing an applicable conical support 5, controlling the conical surface angle of the conical support 5 to be 30-45 degrees, ensuring that the actual supporting part (the part contacted with the forging 1) is in the middle section of the conical supporting conical surface and the vertical deviation is within 20mm in the hole closing process, and fixing the second core rod 4 and the conical support 5 firmly to form a combined core rod 6 in a spot welding mode;
a first fire: chamfering, chopping and blanking steel ingots of raw materials, upsetting, rounding and flattening, punching, and manufacturing a blank 2 according to the process required size, as shown in figure 8;
and (3) second fire: drawing out the blank 2, and drawing out the blank 2 to the size required by the process by using a first core rod 3 to obtain a prototype forging 1 as shown in figure 9. The convex part on the excircle of the forging 1 must be forged strictly according to the process size, the convex part must be guaranteed to meet the requirement of hole shrinkage for the third fire, and the process size of the convex part is determined according to the following two points: 1) the length of the protruding part is required to be more than or equal to the wall thickness of the protruding part 1/3, and the length of the protruding part is ensured to be more than 50mm shorter than the step of the inner hole forged by the third fire at the part. 2) The size of the outer circle of the convex part is calculated by weight according to the law of weight invariance on the basis of considering the fire loss of the hole closing end and the sawing of the flat head residual block of the hole closing end. The process of weight calculation is detailed below: and the weight of the second fire-time convex part is equal to the weight of the inner hole step section after the hole is closed for the third fire time, the weight of the second fire-time convex part is added in the third fire-time heating fire consumption weight, the subsequent sawing flat head weight of the end face of the inner hole step section of the third fire-time closing hole, the weight of the second fire-time convex part can be calculated through the calculation mode, then the weight of the convex part is obtained according to the calculation mode, the length of the inner hole step section forged by the third fire time is assumed to be L, the length of the convex part is L-50mm, the size of the inner hole is consistent with that of the first 3 core rods, and the size of the first 3 core rods is known.
And (3) third fire: and (3) using the combined core rod 6 to close the hole of the forged piece 1 to the required size of the finished product of the forged piece 1, as shown in figure 10. The right end of the forging piece 1 is fixed through the combined core rod 6 in the hole closing process, and deviation caused by instability of the forging piece 1 in the process of closing the hole in the step inner hole is avoided. Through the reciprocating downward pressing motion of the flat anvil 7 (the V-shaped anvil 8 is fixed on the feeding table and is matched with the flat anvil 7) and the rotary motion of the combined core rod 6, the protruding part of the second hot blank is closed to meet the size requirement of the forge piece, the rotary angle of the combined core rod 6 at the initial stage of driving the forge piece 1 is 12-15 degrees, and the rolling reduction is more than or equal to 50 mm; in the finishing stage, the rotation angle and the reduction are properly reduced, the combined core rod 6 drives the forge piece 1 to rotate by 8-10 degrees, and the reduction is 10-20mm, so that a finished product of the forge piece 1 is obtained, as shown in fig. 1 and 2.
The utility model discloses a frock is simple, convenient to use, and drawing requirement can be guaranteed to the not only overall dimension of finished product of obtained forging 1, has practiced thrift material and machining expense moreover greatly to guarantee that the inside streamline of forging is not cut off, increased forging life, strengthened the market competition of this type of forging.
Claims (5)
1. An auxiliary combined core rod for forging a step inner hole cylinder forging is characterized by comprising a first core rod (3) and a combined core rod (6) which are matched,
the first core rod (3) is structurally characterized by comprising a first step (31) and a first cone (32) which are integrally machined;
the combined core rod (6) is fixed into a whole by the second core rod (4) and the conical support (5) through spot welding; the second core rod (4) comprises a step II (41), a cylinder (42) and a cone II (43) which are integrally processed, and a conical hole is formed in the conical main body of the conical support (5) along the axial direction.
2. The auxiliary combined mandrel for forging the stepped inner hole cylinder forging according to claim 1, wherein: the conicity of the cone I (32) and the taper of the cone II (43) are both 1: 100.
3. The auxiliary combined mandrel for forging the stepped inner hole cylinder forging according to claim 1, wherein: the taper of the outer surface of the conical main body of the conical support (5) is 1: 100.
4. The auxiliary combined mandrel for forging the stepped inner hole cylinder forging according to claim 1, wherein: the diameter of the cylinder (42) is larger than that of the cylindrical step II (41).
5. The auxiliary combined mandrel for forging the stepped inner hole cylinder forging according to claim 1, wherein: the conical surface angle of the conical support (5) is 30-45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921392273.XU CN210817234U (en) | 2019-08-26 | 2019-08-26 | Auxiliary combined core rod for forging step inner hole cylinder type forge piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921392273.XU CN210817234U (en) | 2019-08-26 | 2019-08-26 | Auxiliary combined core rod for forging step inner hole cylinder type forge piece |
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| CN210817234U true CN210817234U (en) | 2020-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947551A (en) * | 2020-07-31 | 2020-11-17 | 北京北机机电工业有限责任公司 | Integral full-shape core rod |
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2019
- 2019-08-26 CN CN201921392273.XU patent/CN210817234U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947551A (en) * | 2020-07-31 | 2020-11-17 | 北京北机机电工业有限责任公司 | Integral full-shape core rod |
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