CN115090774A - Pipe reducing mold with equal wall thickness and pipe reducing process - Google Patents
Pipe reducing mold with equal wall thickness and pipe reducing process Download PDFInfo
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- CN115090774A CN115090774A CN202210707078.1A CN202210707078A CN115090774A CN 115090774 A CN115090774 A CN 115090774A CN 202210707078 A CN202210707078 A CN 202210707078A CN 115090774 A CN115090774 A CN 115090774A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/04—Reducing; Closing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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Abstract
The invention discloses a pipe reducing mould with equal wall thickness and a pipe reducing process, wherein the pipe reducing mould is of a binary structure and comprises a binary unit and a binary unit, the maximum distance between the binary unit and the binary unit forms a sliding binary distance, the binary structure can realize that a pipe blank smoothly enters a mould to reduce the pipe and returns a core rod to draw the core to trim the wall thickness of the pipe blank, the binary distance is closed to enable the head of a core rod of the mould to move forwards to a mould entering expansion port, and the condition that the pipe blank enters the mould to have enough clearance is ensured; when the die is withdrawn, the distance is gradually increased, the position of the mandrel head of the die is moved to the straight section of the die core, and the original wall thickness of the tube blank is kept after the tube blank is contracted. Therefore, the problem of large-proportion equal-wall-thickness cold-extrusion compression pipes of workpieces such as low-carbon steel seamless steel pipes and the like in the industry at present is effectively solved, the utilization rate of product materials can reach more than 95%, and the proportion of the contracted pipes can reach more than 2.5. The mould adopts binary structural design, and reducible power unit is constituteed, is favorable to promoting the efficiency, the quality and the reduce cost of batch production.
Description
Technical Field
The invention relates to the technical field of metal workpiece processing, in particular to a pipe shrinking mold and a pipe shrinking process for performing pipe shrinking molding on a metal pipe fitting.
Background
The method is applied to metal tubular hollow products in many fields, and the products are generally formed in advance to obtain an initial tube blank, such as a tube blank for an internal and high-pressure integrated axle housing, and then the tube blank is subjected to a tube reducing process by matching a tube reducing machine with a tube reducing die and other equipment to finally obtain a finished tube blank. However, for products such as low-carbon steel seamless steel tubes with small self-stretching coefficients, diameter reduction by cold extrusion is a common practice in the industry, but the pipe shrinkage ratio in the industry is only about 1.5 at present, but the pipe shrinkage ratio of about 1.5 cannot meet the use requirements in many fields. In addition, the prior art can not realize the pipe shrinking at a large proportion (usually, the pipe shrinking proportion is calculated to be large proportion when reaching about 2.5), and simultaneously, the wall thickness of the pipe is not increased or reduced, namely, the pipe shrinking at a large proportion with equal wall thickness is difficult to realize.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a constant-wall-thickness pipe reducing mold and a pipe reducing process, wherein the mold is simple in structure and more reasonable in design, and the constant-wall-thickness pipe reducing mold and the pipe reducing process can be used for realizing the equal-wall-thickness pipe reducing molding of workpieces such as carbon steel pipes and the like made of low-tensile system materials.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a wall thickness reducing pipe mould to slidable structure installs on reducing pipe equipment, its characterized in that: the pipe reducing mold comprises a binary system unit and a binary system unit, wherein the binary system unit is arranged at the outer side of the binary system unit and is respectively installed on pipe reducing equipment in a sliding mode to form a binary system structure with a synchronous sliding process and an independent sliding process, the sliding distance of the binary system unit is larger than that of the binary system unit, the excessive sliding distance of the binary system unit forms a binary system distance, and the binary system distance is also the maximum distance between the binary system unit and the binary system unit in the independent sliding process;
the first system unit comprises a pipe reducing mold core, and the pipe reducing mold core is arranged at the front end of a sliding support body to form a structure capable of moving synchronously with the sliding support body; the sliding support body is provided with a forming cavity, a mold core rod is inserted in the forming cavity, and the tail end of the mold core rod is installed on the binary system unit to form a structure capable of synchronously moving along with the binary system unit; the binary unit is connected with a driving mechanism, the binary unit is driven to slide by the driving mechanism, and the binary unit drives the linear unit to move so as to complete pipe shrinkage molding;
the inner cavity of the pipe contracting mold core comprises an expanding section and a straight cylinder section, the expanding section is positioned at the front end and faces the pipe blank, and the straight cylinder section is positioned at the rear end and is butted with the tail part of the expanding section; the minimum inner diameter of the flaring section is larger than the outer diameter of the tube blank, and the inner diameter of the straight tube section is equivalent to the outer diameter of the tube blank; when the die is opened, the head of the die core rod is positioned in the straight cylinder section of the pipe reducing die core, and the minimum distance between the outer surface of the head of the die core rod and the inner wall of the straight cylinder section of the pipe reducing die core is the same as the wall thickness of the pipe blank; when the pipe reducing mold is closed, the binary unit and the binary unit are attached to each other, the head of the mold core rod enters the flaring section of the pipe reducing mold core, and the distance between the head of the mold core rod and the inner wall of the flaring section is larger than the wall thickness of the pipe blank.
Furthermore, the flaring section of the pipe contracting mold core is of a conical structure which gradually shrinks inwards, the head part of the mold core rod is a thickening head with a diameter larger than the diameter of the main body part of the mold core rod, the thickening head can be provided with a front section in a round rod shape, a rear section in a tapered conical shape, and the conical part is connected with the main body part of the mold core rod; the thickening head is positioned in the straight cylinder section of the pipe reducing mold core in the mold opening state, and the minimum distance between the outer surface of the thickening head and the inner wall of the straight cylinder section of the pipe reducing mold core is the same as the wall thickness of the pipe blank; when the pipe reducing die is closed, the binary system unit and the one system unit are attached to each other, the thickening head enters the flaring section of the pipe reducing die core, and the distance between the thickening head and the inner wall of the flaring section is larger than the wall thickness of the pipe blank.
Furthermore, the sliding support body is arranged on a first support seat, and the first support seat is arranged on a guide rail of the pipe reducing equipment through a sliding block.
Furthermore, the binary system unit comprises a second supporting seat, and the second supporting seat is installed on the guide rail through another sliding block and is positioned outside the first supporting seat.
Further, the binary unit also comprises a cooling mechanism, and the cooling mechanism extends into the forming cavity of the sliding support body and is aligned with the die core rod and the tube blank inserted into the forming cavity.
Furthermore, the cooling mechanism comprises a water inlet pipe and a cooling pipeline, the water inlet pipe is arranged on the second supporting seat, and the cooling pipeline is connected with the water inlet pipe and penetrates through the second supporting seat to extend to the forming cavity; and a water spray nozzle is arranged at the outlet of the cooling pipeline through a water channel cover plate, the water spray nozzle is aligned with the mold core rod and the pipe blank inserted into the molding cavity, and cooling water or cooling liquid is sprayed onto the pipe blank and inside the mold through the water spray nozzle.
Furthermore, the second supporting seat is connected with a side cylinder rod of a side cylinder serving as a driving mechanism through a side cylinder flange, and the binary distance is the maximum distance generated when the second supporting seat and the first supporting seat slide relatively.
Preferably, a set of pipe reducing dies are respectively arranged on the left side and the right side of the pipe blank, and the pipe reducing dies on the two sides are symmetrically arranged, wherein the arrangement mainly aims at workpieces needing pipe reducing forming on the two sides simultaneously.
A pipe reducing process based on the equal-wall-thickness pipe reducing mold is characterized in that: the method comprises the following steps of (1),
step 3, the side cylinder rod pushes the pipe contracting mold to move towards the pipe blank, so that the mold core rod and the pipe contracting mold core also move towards the pipe blank; when the pipe contracting mold core contacts the pipe blank, the first system unit slides backwards under the action of resistance due to the action of the resistance of the pipe blank entering the mold, and the sliding distance reaches the first system distance and then is attached to the second system unit; at the moment, the thickening head of the mold core rod extends into the flaring section of the pipe reducing mold core, and the gap at the position is larger than the gap in the straight cylinder section, so that the pipe blank can smoothly pass through the pipe reducing mold core and enter the forming cavity when being guided into the pipe reducing mold;
step 4, in the process that the tube blank enters the forming cavity, the thickness of the tube blank is influenced by the extrusion of the pipe shrinking die core and the die core rod, so that the thickness of the tube blank is increased and is changed into a wavy irregular shape;
and 7, after the integral retraction of the pipe shrinking mold is finished, the pipe blank returns to the original wall thickness and is integrally smooth and flat, the cooling system is closed, and the pipe shrinking is finished. Certainly, the whole pipe reducing process can be divided into a plurality of (for example, three) working procedures, each working procedure completes a certain pipe reducing process, and the final pipe reducing molding of the pipe blank can be realized after all the working procedures are completed.
Further, when the pipe blank enters and exits the interior of the pipe contracting mould, the pipe contracting mould and the pipe blank are lubricated and cooled through a water spray nozzle, so that the pipe contracting process is ensured to be smooth and the mould is protected.
The pipe reducing die is designed into a binary structure and consists of a binary unit and a binary unit, the maximum distance between the binary unit and the binary unit forms a sliding binary distance, the large-proportion pipe reducing is pushed forwards through the die, and the equal wall thickness is ensured by drawing a core backwards. The binary structure can realize smooth entering of the tube blank into a die reducing pipe and withdrawal of a core rod for core pulling and trimming of the wall thickness of the tube blank, the binary distance opening and closing is mainly reflected on the position change of a working position of a core pulling head, and the binary distance closing enables the head of the core rod of the die to move forward to a die entering expansion opening so as to ensure that the tube blank enters the die with enough clearance; when the die is withdrawn, the distance is gradually increased, the position of the mandrel head of the die is moved to the straight section of the die core, and the original wall thickness of the tube blank is kept after the tube blank is contracted.
Therefore, the problem of large-proportion equal-wall-thickness cold-extrusion compression pipes of workpieces such as low-carbon steel seamless steel pipes and the like in the industry at present is effectively solved, the utilization rate of product materials can reach more than 95%, and the proportion of the contracted pipes can reach more than 2.5. The die is provided with a cooling and lubricating circulating mechanism, is integrally designed in a modular mode, is convenient to replace and maintain, and can change the manufacturing environment with low efficiency and messy difference in the industry. The mold adopts a binary structure design, can reduce the composition of power mechanisms, is beneficial to realizing miniaturization and simplification, and can realize the effect of finishing four actions in two directions by one power. The efficiency, the quality and the cost of batch production are improved qualitatively, the method is suitable for automatic production, and the modern production without pollution, standardization and automation can be realized.
Drawings
FIG. 1 is a schematic view showing a change from closing to opening of a pipe-contracting mold in a molding process according to the present invention;
FIG. 2 is a schematic structural view of a pipe shrinking mold according to the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a schematic view showing the changing states of the pipe contracting mold and the pipe blank in the molding process of the present invention;
FIG. 5 is a schematic view of the installation of the pipe reduction die in the pipe reduction machine;
fig. 6 is a schematic diagram showing the change of the tube blank forming process of the invention.
In the figure, a is a unit of a scale, B is a unit of a scale, 1 is a water inlet pipe, 2 is a cooling pipeline, 3 is a water channel cover plate, 4 is a water spray nozzle, 5 is a mold core rod, 6 is a pipe shrinking mold core, 61 is an expanding section, 62 is a straight cylinder section, 7 is a sliding support body, 71 is a forming cavity, 8 is a first support seat, 9 is a second support seat, 10 is a side cylinder rod, 11 is a slide block, 12 is a guide rail, 13 is a side cylinder flange, and 14 is a tube blank.
Detailed Description
In this embodiment, referring to fig. 1 to 6, the pipe reducing mold with the same wall thickness is installed on a pipe reducing device (e.g. a pipe reducing machine) in a slidable structure, the pipe reducing mold includes a binary unit a and a binary unit B, the binary unit B is disposed at an outer side of the binary unit a, and the binary unit B are respectively installed on the pipe reducing device in a sliding manner to form a binary structure with a synchronous sliding process and an independent sliding process, wherein a sliding distance of the binary unit B is greater than a sliding distance of the binary unit a, an excessive sliding distance of the binary unit B forms a binary distance L4, and the binary distance L4 is also a maximum distance between the binary unit a and the binary unit B in the independent sliding process;
the first system unit A comprises a pipe reducing mold core 6, and the pipe reducing mold core 6 is arranged at the front end of a sliding support body 7 to form a structure capable of synchronously moving along with the sliding support body 7; the sliding support body 7 is provided with a forming cavity 71, a die core rod 5 is inserted into the forming cavity 71, and the tail end of the die core rod 5 is installed on the binary system unit B to form a structure capable of synchronously moving along with the binary system unit B; the binary unit B is connected with a driving mechanism, the driving mechanism drives the binary unit B to slide, and the binary unit B drives the linear unit A to move so as to complete pipe reducing molding;
the inner cavity of the pipe contracting mold core 6 comprises an expanding section 61 and a straight tube section 62, the expanding section 61 is positioned at the front end and faces the pipe blank 14, and the straight tube section 62 is positioned at the rear end and is butted with the tail part of the expanding section 61; the minimum inner diameter of the flaring section 61 is larger than the outer diameter of the tube blank 14, and the inner diameter of the straight tube section 62 is equivalent to the outer diameter (the pipe reducing part) of the tube blank 14; when the mold core rod 5 is in a mold opening state, the head part of the mold core rod 5 is positioned in the straight cylindrical section 62 of the pipe reducing mold core 6, and the minimum distance between the outer surface of the head part of the mold core rod 5 and the inner wall of the straight cylindrical section 62 of the pipe reducing mold core 6 is the same as or equal to the wall thickness H of the pipe blank 14; when the pipe reducing die is closed, the binary unit B and the binary unit A are attached to each other, the head of the die core rod 5 enters the flaring section 61 of the pipe reducing die core 6, and the distance between the head of the die core rod 5 and the inner wall of the flaring section 61 is larger than the wall thickness H of the pipe blank 14.
The flaring section 61 of the pipe contracting mold core 6 is of a conical structure which gradually shrinks inwards, the head part of the mold core 5 is a thickening head with a diameter larger than the diameter of the main part of the mold core 5, the thickening head can be provided with a front section in a round rod shape, a rear section in a tapered conical shape, and the conical part is connected with the main part of the mold core 5; the thickening head is positioned in the straight cylinder section 62 of the pipe reducing mold core 6 in a mold opening state, and the minimum distance between the outer surface of the thickening head and the inner wall of the straight cylinder section 62 of the pipe reducing mold core 6 is the same as the wall thickness H of the pipe blank 14; when the pipe reducing die is closed, the binary unit B and the binary unit A are attached to each other, the thickening head enters the flaring section 61 of the pipe reducing die core 6, and the distance between the thickening head and the inner wall of the flaring section 61 is larger than the wall thickness H of the pipe blank 14.
The sliding support body 7 is arranged on a first support seat 8, and the first support seat 8 is arranged on a guide rail 12 of the pipe reducing device through a slide block 11.
The binary unit B comprises a second support 9, the second support 9 is mounted on the guide rail 12 via another slide 11 and is located outside the first support 8.
The binary unit B also comprises a cooling mechanism which extends into the forming cavity 71 of the slide support 7 and aligns the die core rod 5 and the tube blank 14 inserted into the forming cavity 71.
The cooling mechanism comprises a water inlet pipe 1 and a cooling pipeline 2, the water inlet pipe 1 is arranged on the second supporting seat 9, and the cooling pipeline 2 is connected with the water inlet pipe 1 and extends to the forming cavity 71 through the second supporting seat 9; a water nozzle 4 is installed at the outlet of the cooling pipeline 2 through a water channel cover plate 3, the water nozzle 4 is aligned with the die core rod 5 and the tube blank 14 inserted into the forming cavity 71, and cooling water or cooling liquid is sprayed onto the tube blank 14 and the inside of the die through the water nozzle 4.
The second supporting seat 9 is connected with a side cylinder rod 10 of a side cylinder as a driving mechanism through a side cylinder flange 13, and the binary distance L4 is the maximum distance generated when the second supporting seat 9 and the first supporting seat 8 slide relatively.
The left side and the right side of the tube blank 14 are respectively provided with a set of pipe reducing dies, and the pipe reducing dies on the two sides are symmetrically arranged, and the arrangement mainly aims at workpieces needing pipe reducing forming on the two sides simultaneously.
Based on the pipe reducing process of the pipe reducing mould with the equal wall thickness, the pipe reducing process is carried out according to the following steps,
step 3, the side cylinder rod 10 pushes the pipe reducing die to move towards the pipe blank 14, so that the die core rod 5 and the pipe reducing die core 6 also move towards the pipe blank 14; when the pipe reducing mold core 6 contacts the pipe blank 14, the first system unit A slides backwards under the action of resistance due to the action of the resistance of the pipe blank 14 entering the mold, and the sliding distance reaches a system distance L4 and then is jointed with the second system unit B; at this time, the enlarged head of the mold core rod 5 extends into the flaring section 61 of the pipe reducing mold core 6, and the gap is larger than the gap in the straight cylindrical section 62, so that the pipe blank 14 can smoothly pass through the pipe reducing mold core 6 to enter the forming cavity 71 when being guided into the pipe reducing mold;
step 4, in the process that the tube blank 14 enters the forming cavity 71, the thickness H of the tube blank 14 is influenced by the extrusion of the pipe-reducing die core 6 and the die core rod 5, so that the thickness of the tube blank 14 is increased to H1 and is changed into a wavy irregular shape;
and 7, after the integral retracting action of the pipe reducing die is finished, the pipe blank 14 returns to the original wall thickness H and is integrally smooth and flat, the cooling system is closed, and pipe reducing is finished.
When the tube blank 14 enters and exits the interior of the pipe reducing die, the pipe reducing die and the tube blank 14 are lubricated and cooled through the water spray nozzle 4, so that the pipe reducing process is smooth and the die is protected.
Certainly, the whole pipe reducing process can be divided into a plurality of (for example, three) processes, each process completes a certain pipe reducing process, and the final pipe reducing molding of the pipe blank is realized after all the processes are completed.
The following three steps are further described as examples:
1) increasing the length L of the tube blank 14 to L1 through a tube reducing mould at a first station, and finishing a first tube reducing process;
2) after the first process of pipe reducing is finished, an automatic feeding mechanism of pipe reducing equipment is controlled by a system to start working, the pipe blank 14 subjected to pipe reducing in the first process is sent to a jig of a second station, then the pipe reducing process is repeated, the length L1 of the pipe blank 14 is increased to L2, and the second process of pipe reducing is finished;
3) after the second process of pipe contraction is finished, an automatic feeding mechanism of the pipe contraction equipment starts to work under the control of the system, the pipe blank 14 after the pipe contraction of the second process is finished is sent to a jig of a third station, then the pipe contraction process is repeated, the length L2 of the pipe blank 14 is increased to L3, the third process of pipe contraction is finished, the pipe blank 14 is sent out through the automatic feeding mechanism, and the pipe contraction is finished.
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (10)
1. The utility model provides a wall thickness reducing pipe mould to slidable structure installs on reducing pipe equipment, its characterized in that: the pipe reducing mold comprises a binary system unit and a binary system unit, wherein the binary system unit is arranged at the outer side of the binary system unit and is respectively installed on pipe reducing equipment in a sliding mode to form a binary system structure with a synchronous sliding process and an independent sliding process, the sliding distance of the binary system unit is larger than that of the binary system unit, the excessive sliding distance of the binary system unit forms a binary system distance, and the binary system distance is also the maximum distance between the binary system unit and the binary system unit in the independent sliding process;
the first system unit comprises a pipe reducing mold core, and the pipe reducing mold core is arranged at the front end of a sliding support body to form a structure capable of moving synchronously with the sliding support body; the sliding support body is provided with a molding cavity, a mold core rod is inserted in the molding cavity, and the tail end of the mold core rod is installed on the binary system unit so as to form a structure capable of synchronously moving along with the binary system unit; the binary unit is connected with a driving mechanism, the binary unit is driven to slide through the driving mechanism, and the binary unit drives the first unit to move so as to complete pipe shrinking forming;
the inner cavity of the pipe contracting mold core comprises an expanding section and a straight cylinder section, the expanding section is positioned at the front end and faces the pipe blank, and the straight cylinder section is positioned at the rear end and is butted with the tail part of the expanding section; the minimum inner diameter of the flaring section is larger than the outer diameter of the tube blank, and the inner diameter of the straight cylinder section is equivalent to the outer diameter of the tube blank; when the mold core rod is in a mold opening state, the head of the mold core rod is positioned in the straight cylinder section of the pipe reducing mold core, and the minimum distance between the outer surface of the head of the mold core rod and the inner wall of the straight cylinder section of the pipe reducing mold core is the same as the wall thickness of the pipe blank; when the pipe reducing mold is closed, the binary system unit and the binary system unit are attached to each other, the head of the mold core rod enters the flaring section of the pipe reducing mold core, and the distance between the head of the mold core rod and the inner wall of the flaring section is larger than the wall thickness of the pipe blank.
2. The constant wall thickness reducing pipe mold according to claim 1, wherein: the flaring section of the pipe reducing mold core is of a conical structure which gradually shrinks inwards, the head of the mold core rod is an increasing head with the diameter larger than the diameter of the main body part of the mold core rod, the increasing head is positioned in the straight cylinder section of the pipe reducing mold core in the mold opening state, and the minimum distance between the outer surface of the increasing head and the inner wall of the straight cylinder section of the pipe reducing mold core is the same as the wall thickness of the pipe blank; when the pipe reducing mold is closed, the binary unit and the binary unit are attached to each other, the thickening head enters the flaring section of the pipe reducing mold core, and the distance between the thickening head and the inner wall of the flaring section is larger than the wall thickness of the pipe blank.
3. The equal wall thickness reduction mold of claim 2, wherein: the sliding support body is arranged on a first support seat, and the first support seat is arranged on a guide rail of the pipe reducing device through a sliding block.
4. The equal wall thickness reduction mold of claim 3, wherein: the binary system unit comprises a second supporting seat, and the second supporting seat is arranged on the guide rail through another sliding block and is positioned on the outer side of the first supporting seat.
5. The equal wall thickness reduction mold of claim 4, wherein: the binary system unit also comprises a cooling mechanism, and the cooling mechanism extends into the forming cavity of the sliding support body and is aligned with the die core rod and the pipe blank inserted into the forming cavity.
6. The equal wall thickness reduction mold of claim 5, wherein: the cooling mechanism comprises a water inlet pipe and a cooling pipeline, the water inlet pipe is arranged on the second supporting seat, and the cooling pipeline is connected with the water inlet pipe and penetrates through the second supporting seat to extend to the forming cavity; and a water spray nozzle is arranged at the outlet of the cooling pipeline through a water channel cover plate and is aligned with the mold core rod and the pipe blank inserted into the forming cavity.
7. The equal wall thickness reduction mold of claim 6, wherein: the second supporting seat is connected with a side cylinder rod of a side cylinder serving as a driving mechanism through a side cylinder flange, and the carry-over distance is the maximum distance generated when the second supporting seat and the first supporting seat slide relatively.
8. The equal wall thickness reduction mold of claim 7, wherein: the left side and the right side of the tube blank are respectively provided with a set of pipe contracting dies, and the pipe contracting dies on the two sides are symmetrically arranged.
9. A pipe shrinking process based on the equal-wall-thickness pipe shrinking mold of claim 8, wherein: the method comprises the following steps of (1),
step 1, placing the tube blank into a jig of a pipe reducing device;
step 2, the pipe reducing equipment clamps the middle shape of the pipe blank under the control of a numerical control system, and the left and right side cylinders drive a pipe reducing die to start pipe reducing under the control of the system;
step 3, the side cylinder rod pushes the pipe contracting mold to move towards the pipe blank, so that the mold core rod and the pipe contracting mold core also move towards the pipe blank; when the pipe contracting mold core contacts the pipe blank, the first system unit slides backwards under the action of resistance due to the action of the resistance of the pipe blank entering the mold, and the sliding distance reaches the first system distance and then is attached to the second system unit; at the moment, the thickening head of the mold core rod extends into the flaring section of the pipe reducing mold core, and the gap at the position is larger than the gap in the straight cylinder section, so that the pipe blank can smoothly pass through the pipe reducing mold core and enter the forming cavity when being guided into the pipe reducing mold;
step 4, in the process that the tube blank enters the forming cavity, the thickness of the tube blank is influenced by the extrusion of the pipe shrinking die core and the die core rod, so that the thickness of the tube blank is increased and is changed into a wavy irregular shape;
step 5, after the set length of the pipe blank completely enters the pipe reducing die, the binary system unit starts to do a return action under the driving of the side cylinder rod; at the moment, the first system unit can be kept still due to the action of friction force with the pipe blank, the first system unit is pulled to a first system distance under the action of the retraction of the second system unit, and meanwhile, the thickening head of the mold core rod is pulled back to the straight cylinder section of the pipe reducing mold core, and the process is the second system action;
step 6, the binary system unit continuously returns to drive the binary system unit to enable the pipe reducing die to start to integrally pull back, and due to the fact that the gap between the thickening head of the die core rod and the inner wall of the straight cylinder section of the pipe reducing die core rod is the same as the original wall thickness of the pipe blank, the pulling back of the die core rod enables the increased wall thickness of the pipe blank to be trimmed again and thinned to the original thickness;
and 7, after the integral retracting action of the pipe reducing die is finished, the pipe blank returns to the original wall thickness and is integrally smooth and flat, the cooling system is closed, and pipe reducing is finished.
10. A pipe shrinking process according to claim 9, wherein: and lubricating and cooling the pipe contracting die and the pipe blank through a water nozzle when the pipe blank enters and exits from the interior of the pipe contracting die.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116475305A (en) * | 2023-06-21 | 2023-07-25 | 倍力汽车轻量化科技(潍坊)有限公司 | Commercial vehicle and light commercial wheel house bracket tube beam and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116475305A (en) * | 2023-06-21 | 2023-07-25 | 倍力汽车轻量化科技(潍坊)有限公司 | Commercial vehicle and light commercial wheel house bracket tube beam and manufacturing method thereof |
| CN116475305B (en) * | 2023-06-21 | 2023-10-24 | 倍力汽车轻量化科技(潍坊)有限公司 | Commercial vehicle and light commercial wheel house bracket tube beam and manufacturing method thereof |
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