阅读说明：本技术 一种热旋压支重轮成型方法 (Hot spinning thrust wheel forming method ) 是由 汤善忠 于 2021-09-25 设计创作，主要内容包括：本发明公开一种热旋压支重轮成型方法,该成型方法包括如下步骤：S1、下料：采用冲床进行加工生产板材,获得加工坯料；S2、预热：采用加温机对加工坯料进行预热处理,获得预热加工坯料；S3、旋压成型：采用旋压机对预热加工坯料进行四步旋压工序成型,以获得支重轮粗型；本发明能够采用预热工序对加工坯料进行预热,使加工坯料韧性提高,进而改善加工坯料工艺性能和使用性能,方便对加工坯料进行旋压,并且通过该旋压工艺,能够制备支重轮粗型,方便使用,能够大大减小生产工艺难度。(The invention discloses a hot spinning thrust wheel forming method, which comprises the following steps: s1, blanking: processing the plate by a punch press to obtain a processed blank; s2, preheating: preheating the processing blank by a heating machine to obtain a preheated processing blank; s3, spinning forming: carrying out four-step spinning forming on the preheated blank by using a spinning machine to obtain a rough shape of the thrust wheel; the method can preheat the processing blank by adopting a preheating procedure, so that the toughness of the processing blank is improved, the processing property and the use property of the processing blank are further improved, the processing blank is convenient to spin, the rough type of the thrust wheel can be prepared by the spinning process, the use is convenient, and the difficulty of the production process can be greatly reduced.)

1. A hot spinning thrust wheel forming method is characterized in that: the molding method comprises the following steps:

s1, blanking: processing the plate by a punch press to obtain a processed blank (1);

s2, preheating: preheating the processing blank (1) by a heating machine to obtain a preheated processing blank;

s3, spinning forming: and (3) carrying out four-step spinning forming on the preheated blank by using a spinning machine to obtain the rough profile (15) of the thrust wheel.

2. The method for forming a hot-spinning thrust roller according to claim 1, wherein: in the step S2, the preheating time of the processed blank (1) is 1-1.5min, and the preheating temperature of the preheated processed blank is 400-500 ℃.

3. The method for forming a hot-spinning thrust roller according to claim 2, wherein: the pressure of the spinning machine in the step S3 is 800 KN; the rotating speed of the spinning machine is 1000-1400 revolutions per minute.

4. The method for forming a hot-spinning thrust roller according to claim 3, wherein: the spinning die comprises a spinning upper die (3) and a spinning lower die (4), the spinning upper die (3) is arranged on a pressing shaft of the spinning machine, and the spinning lower die (4) is arranged on a main shaft of the spinning machine; one side of the rotary pressing die (4) is provided with a first forming cutter (5), a second forming cutter (6), a third forming cutter (7) and a fourth forming cutter (8).

5. The method for forming a hot-spinning thrust roller according to claim 4, wherein: in step S3, the specific steps of the spin forming include a clamping and shaping step, and the clamping and shaping step includes the following steps:

1) and clamping: the preheating processing blank is placed on a rotary pressing-down die (4) and is positioned and installed, a rotary pressing-up die (3) presses down and is used for compressing the preheating processing blank through the cooperation of the rotary pressing-down die (4), the preheating processing blank is pressed by the rotary pressing-up die (3) to enable the outer edge of the preheating processing blank to be bent downwards, and the preheating processing blank is made into a first processing blank body (11) in the process.

6. The method for forming a hot-spinning roller according to claim 5, wherein: the integral structure of the first machining blank body (11) comprises a first supporting wheel end face (111) and a first hub forming face (112) which are integrally connected, and an arc transition section is arranged at the joint of the first hub forming face (112) and the first supporting wheel end face (111).

7. The method for forming a hot-spinning roller according to claim 6, wherein: the specific process of the spinning forming further comprises a spinning process, and the spinning process comprises the following steps:

2) and a first spinning process: the rotary pressing die (4) and the rotary pressing upper die (3) simultaneously drive the first processing blank body (11) to rotate, the first forming cutter (5) performs horizontal feeding, a first hub forming surface (112) of the first processing blank body (11) is pushed to one side close to the lower part of the rotary pressing die (4), a second processing blank body (12) is formed in the process, and the first forming cutter (5) resets after feeding is completed;

3) and a second spinning process: the second forming cutter (6) is horizontally fed, a second hub forming surface (122) of the second processing blank body (12) is pushed to one side close to the lower side of the rotary pressing die (4), a third processing blank body (13) is formed in the process, and the second forming cutter (6) is reset after feeding is finished;

4) and a third spinning procedure: horizontally feeding the third forming cutter (7), pushing a third hub forming surface (132) of the third processing blank body (13) to one side close to the lower part of the rotary pressing die (4), forming a fourth processing blank body (14) in the process, and resetting after the third forming cutter (7) is fed;

5) and a fourth spinning process: and horizontally feeding the fourth forming cutter (8), pushing a fourth hub forming surface (142) of the fourth processing blank body (14) to one side close to the outer surface of the rotary pressing die (4), forming a thrust wheel rough type (15) in the process, and resetting after the feeding of the fourth forming cutter (8) is finished.

8. The method for forming a hot-spinning roller according to claim 7, wherein: the specific process of the spinning forming further comprises a spinning process, and the spinning process comprises the following steps: the external included angle between the end face (121) of the second thrust wheel and the second hub forming face (122) in the step 2) is 60 degrees;

and in the step 3), an outer included angle between the third thrust wheel end surface (131) of the third machined blank body (13) and the third hub forming surface (132) is 90 degrees.

9. The method for forming a hot-spinning roller according to claim 8, wherein: the outer included angle between the fourth supporting wheel end surface (141) and the fourth hub forming surface (142) of the fourth machined green body (14) in the step 4) is 95 degrees;

in the step 5), the included angle between the thrust wheel end surface (151) and the hub surface (152) of the thrust wheel rough type (15) is 90 degrees.

10. The method for forming a hot-spinning roller according to claim 9, wherein: the feeding speeds of the first forming cutter (5), the second forming cutter (6), the third forming cutter (7) and the fourth forming cutter (8) are all 2 mm/s; the feeding forces are all as follows: 200 KN.

Technical Field

The invention belongs to the technical field of spinning forming, and particularly relates to a hot spinning belt pulley forming method.

Background

At present, the domestic track thrust wheel is still formed by adopting a traditional cast blank and then machining, and the machining method causes the wall thickness of parts to be very thick and the weight to be heavier; the cutting amount is large, reinforcing ribs need to be cast in the thrust wheel, and the material utilization rate is low; pores can be formed in the cast blank, so that the density is uneven, dynamic balance treatment is required after the thrust wheel is machined, and the production efficiency is low; the manufacturing cycle is long and the energy consumption is high.

In order to solve the above technical problems, a spinning process is also used in the market to produce the thrust wheel, wherein the spinning process comprises the following steps: CN201010272155.2 discloses a spinning forming method of a single V-groove belt pulley, which comprises the following steps: a. stamping a steel plate into a first blank I with a boss; b. the first spinning cutter spins the boss part of the first blank I towards the center to form a second blank II with a bearing chamber; c. the second spinning cutter on the left side spins and extrudes the outer edge of the second blank II inwards to form a third blank III with a semi-electromagnetic coil groove; d. a third spinning cutter on the left side cuts a part of the rim of the third blank III and performs spinning extrusion to a certain height; the third spinning cutter on the right side spins and pushes the cut part inwards to form the wall of the coil slot, and a fourth blank IV of the full electromagnetic coil slot is formed; e. and the fourth spinning cutters on the left and right sides spin and press the rims of the fourth blank IV into complete single V-shaped grooves.

Above-mentioned all kinds of spinning processes can produce the thrust wheel, but this kind of spinning process whole operation is complicated, and manufacturing cost is high, and then reduces the practicality to this kind of current spinning process is when carrying out spin forming to the punching press steel sheet, kink department on the steel sheet produces stress concentration easily, and this stress can make the kink emergence fracture or the crack of steel sheet, and the yield is low, improves manufacturing cost, and this stress can influence the overall structure intensity of thrust wheel, reduces the result of use.

Disclosure of Invention

The invention aims to provide the hot spinning thrust wheel forming method which has simple operation steps and good plasticity, can solve the phenomenon of fracture or crack at the bent part of a steel plate during spinning, improves the yield, improves the integral structural strength of a product, is energy-saving and environment-friendly and can improve the use effect.

In order to solve the technical problems, the invention provides the following technical scheme:

a hot spinning thrust wheel forming method is characterized in that: the molding method comprises the following steps:

s1, blanking: processing the plate by a punch press to obtain a processed blank;

s2, preheating: preheating the processing blank by a heating machine to obtain a preheated processing blank;

s3, spinning forming: and (4) carrying out four-step spinning forming on the preheated blank by using a spinning machine to obtain the rough shape of the thrust wheel.

The following is a further optimization of the above technical solution of the present invention:

in the step S2, the preheating time of the processed blank is 1-1.5min, and the preheating temperature of the preheated processed blank is 400-.

Further optimization: the pressure of the spinning machine in the step S3 is 800 KN; the rotating speed of the spinning machine is 1000-1400 revolutions per minute.

Further optimization: the spinning die comprises a spinning upper die and a spinning lower die, the spinning upper die is arranged on a pressing shaft of the spinning machine, and the spinning lower die is arranged on a main shaft of the spinning machine; one side of the rotary lower die is provided with a first forming cutter, a second forming cutter, a third forming cutter and a fourth forming cutter.

Further optimization: in step S3, the specific steps of the spin forming include a clamping and shaping step, and the clamping and shaping step includes the following steps:

1) and clamping: the preheating processing blank is placed on a rotary pressing die and is positioned and installed, the rotary pressing die presses down the rotary pressing die and is matched with the rotary pressing die to compress the preheating processing blank, the preheating processing blank is pressed by the rotary pressing die to bend the outer edge of the preheating processing blank downwards, and the preheating processing blank is made into a first processing blank body in the process.

Further optimization: the integral structure of the first processing blank body comprises a first supporting wheel end face and a first hub forming face which are integrally connected, and an arc transition section is arranged at the joint of the first hub forming face and the first supporting wheel end face.

Further optimization: the specific process of the spinning forming further comprises a spinning process, and the spinning process comprises the following steps:

2) and a first spinning process: the spinning lower die and the spinning upper die simultaneously drive the first machined green body to rotate, the first forming tool carries out horizontal feeding, the first hub forming surface of the first machined green body is pushed towards one side close to the lower part of the spinning lower die, a second machined green body is formed in the process, and the first forming tool is reset after feeding is finished;

3) and a second spinning process: horizontally feeding the second forming tool, pushing a second hub forming surface of the second processing blank body to one side close to the lower part of the spinning lower die, forming a third processing blank body in the process, and resetting after the feeding of the second forming tool is finished;

4) and a third spinning procedure: horizontally feeding a third forming tool, pushing a third hub forming surface of a third machined blank body to one side close to the lower part of the spinning lower die, forming a fourth machined blank body in the process, and resetting after the feeding of the third forming tool is finished;

5) and a fourth spinning process: and horizontally feeding a fourth forming cutter, pushing a fourth hub forming surface of a fourth processing blank to one side close to the outer surface of the rotary pressing lower die, forming a rough shape of the supporting wheel in the process, and resetting after the fourth forming cutter is fed.

Further optimization: the specific process of the spinning forming further comprises a spinning process, and the spinning process comprises the following steps: the external included angle alpha 1 between the end surface of the second thrust wheel and the second hub forming surface in the step 2) is 60 degrees;

the outer included angle alpha 2 between the third thrust wheel end surface and the third hub forming surface of the third machined blank in the step 3) is 90 degrees.

Further optimization: an outer included angle alpha 3 between the end face of a fourth thrust wheel and the forming face of a fourth hub of the fourth machined green body in the step 4) is 95 degrees;

the included angle alpha 4 between the end surface of the thrust wheel of the coarse type of the thrust wheel and the hub surface in the step 5) is 90 degrees.

Further optimization: the feeding speeds of the first forming cutter, the second forming cutter, the third forming cutter and the fourth forming cutter are all 2 mm/s; the feeding forces are all as follows: 200 KN.

By adopting the technical scheme, the processing blank preheating device is ingenious in concept and reasonable in structure, the preheating process can be adopted to preheat the processing blank, so that the toughness of the processing blank is improved, the processing property and the use property of the processing blank are further improved, the processing blank is convenient to spin, the thick type of the thrust wheel can be prepared through the spinning process, the use is convenient, the production process difficulty can be greatly reduced, and the physical and mechanical properties of the product are improved.

The invention is further illustrated with reference to the following figures and examples.

Drawings

FIG. 1 is a schematic view of a machined blank according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a spinning machine according to an embodiment of the present invention;

FIG. 3 is a schematic view of a first spinning process in an embodiment of the present invention;

FIG. 4 is a schematic view of a second spinning process in an embodiment of the present invention;

fig. 5 is a schematic view of a third spinning process in an embodiment of the present invention;

fig. 6 is a schematic view of a fourth spinning process in the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a thick type of a thrust wheel in an embodiment of the invention.

In the figure: 1-processing a blank; 11-a first processing blank; 111-first bogie end face; 112-a first hub shaping surface; 12-second machining the blank; 121-a second bogie end face; 122-a second hub shaping surface; 13-third processing the blank; 131-a third thrust wheel end face; 132-a third hub shaping surface; 14-fourth processing the blank; 141-fourth bogie end face; 142-a fourth hub shaping surface; 15-track wheel coarse type; 151-thrust wheel end face; 152-a hub surface; 153-transition link segment; 2-a central hole; 3, pressing the die in a rotating manner; 4-pressing the die in a rotating manner; 5-a first forming cutter; 6-a second forming cutter; 7-a third forming cutter; 8-a fourth forming cutter.

Detailed Description

Example 1: referring to fig. 1-7, a method for forming a hot-spinning thrust roller includes the following steps:

s1, blanking: the processing method comprises the steps of processing a plate by using a punch press to obtain a processed blank 1, wherein the overall shape of the processed blank 1 is a circular plate shape, and a central hole 2 is formed in the middle of the processed blank 1 in a punching mode.

The overall dimensions of the machined blank 1 are obtained from the overall dimensions of the thrust wheel product.

S2, preheating: the method comprises the following steps of preheating a processing blank 1 by using a heating machine, firstly, loading the processing blank 1 into the heating machine, starting the heating machine to preheat the processing blank 1 to obtain a preheated processing blank, wherein the preheating time of the processing blank 1 is 1min, and the preheating temperature of the preheated processing blank is 400 ℃.

S3, spinning forming: and spinning the preheated blank by using a spinning machine, mounting the preheated blank on a spinning die of the spinning machine, and forming the preheated blank by using the spinning machine through a four-step spinning process to obtain the rough type 15 of the thrust wheel.

In the step S3, the pressure of the spinning machine is 800 KN; the rotational speed of the spinning machine was 1200 revolutions per minute.

The spinning die in the step S3 includes a spinning upper die 3 and a spinning lower die 4, the spinning upper die 3 is mounted on a pressing shaft of the spinning machine, and the spinning lower die 4 is mounted on a main shaft of the spinning machine.

The spinning machine further comprises a first forming cutter 5, a second forming cutter 6, a third forming cutter 7 and a fourth forming cutter 8, wherein the first forming cutter 5, the second forming cutter 6, the third forming cutter 7 and the fourth forming cutter 8 are respectively arranged on one side of the lower spinning mold 4.

In step S3, the specific steps of the spinning forming include a clamping and shaping step, a spinning step, and a discharging step.

Wherein the clamping and shaping process comprises the following steps:

1) and clamping: and placing the preheated machining blank on a rotary pressing lower die 4, positioning and installing, pressing down by the rotary pressing upper die 3, and pressing the preheated machining blank tightly by the cooperation of the rotary pressing lower die 4.

The pressure of the spinning machine in the step 1) is 800 KN.

The middle part of the upper end face of the spinning lower die 4 in the step 1) is a plane, the periphery of the plane is an arc surface, and the shape of the lower end face of the spinning upper die 3 is matched with the shape of the upper end face of the spinning lower die 4.

When the preheating processing blank is pressed on the rotary pressing lower die 4 by the output pressure of the rotary pressing upper die 3, the preheating processing blank is deformed along the upper end surface of the rotary pressing lower die 4 by the pressure, so that the outer edge of the preheating processing blank is bent downwards, and the preheating processing blank is made into a first processing blank 11 in the process.

The whole structure of the first processing blank body 11 comprises a first supporting wheel end surface 111 and a first hub forming surface 112, wherein the first supporting wheel end surface 111 and the first hub forming surface 112 are integrally connected.

The junction of first wheel hub profiled surface 112 and first thrust wheel terminal surface 111 is provided with the excessive section of circular arc, can reduce stress concentration through the excessive section of this circular arc, and then can prevent that the broken phenomenon from appearing in the coarse type of fashioned thrust wheel, improves production effect.

And can also make things convenient for the later stage to carry out follow-up spinning process through this circular arc transition section, reduce the production degree of difficulty, improve the result of use.

The spinning process comprises the following steps:

2) and a first spinning process: the spinning lower die 4 and the spinning upper die 3 rotate simultaneously to drive the first processing blank body 11 to rotate, at the moment, the first forming cutter 5 of the spinning machine performs horizontal feeding, the first hub forming surface 112 of the first processing blank body 11 is pushed towards one side close to the lower side of the spinning lower die 4, and a second processing blank body 12 is formed in the process.

And resetting the first forming cutter 5 after feeding is finished.

The rotating speed of the lower spinning die 4 and the upper spinning die 3 of the spinning machine is 1200 revolutions per minute, and further the rotating speed of the preheated blank is 1200 revolutions per minute.

The feeding speed of the first forming cutter 5 is 2 mm/s; the feed force of the first forming tool 5 is: 200 KN.

The second blank 12 comprises a second thrust wheel end surface 121 and a second hub forming surface 122 which are integrally connected with each other, and the external included angle alpha 1 between the second thrust wheel end surface 121 and the second hub forming surface 122 is 60 degrees.

When the first forming tool 5 performs spin forming on the first processing blank body 11, the first hub forming surface 112 is gradually bent from 0 degrees to 60 degrees, and then the second processing blank body 12 is prepared.

3) And a second spinning process: and the rotary pressing lower die 4 and the rotary pressing upper die 3 continue to drive the second machined blank body 12 to rotate, at the moment, the second forming tool 6 of the rotary press performs horizontal feeding, and the second hub forming surface 122 of the second machined blank body 12 is pushed towards one side close to the lower part of the rotary pressing lower die 4, so that a third machined blank body 13 is formed in the process.

And resetting the second forming cutter 6 after the feeding is finished.

The feeding speed of the second forming tool 6 is 2 mm/s; the feed force of the second forming tool 6 is: 200 KN.

The third green machining body 13 includes a third bogie end face 131 and a third hub forming face 132 integrally connected to each other, and an outer included angle α 2 between the third bogie end face 131 and the third hub forming face 132 is 90 °.

When the second forming tool 6 performs spin forming on the second machining blank 12, the second hub forming surface 122 is gradually bent from 60 degrees to 90 degrees, and then the third machining blank 13 is prepared.

4) And a third spinning procedure: the spinning lower die 4 and the spinning upper die 3 continue to drive the third machined blank body 13 to rotate, at this time, the third forming cutter 7 of the spinning machine performs horizontal feeding, the third hub forming surface 132 of the third machined blank body 13 is pushed towards one side close to the lower side of the spinning lower die 4, the outer circle of the third hub forming surface 132 is attached to the outer surface of the spinning lower die 4, and the fourth machined blank body 14 is formed in the process.

And resetting the third forming tool 7 after the feeding is finished.

The feeding speed of the third forming cutter 7 is 2 mm/s; the feed force of the third forming tool 7 is: 200 KN.

The fourth work blank 14 includes a fourth bogie end face 141 and a fourth hub forming surface 142 integrally connected to each other, and an outer included angle α 3 between the fourth bogie end face 141 and the fourth hub forming surface 142 is 95 °.

When the third forming tool 7 performs spin forming on the third machined blank 13, the third hub forming surface 132 is gradually bent from 90 ° to 95 °, and then the fourth machined blank 14 is prepared, and at this time, the inner included angle between the fourth thrust wheel end surface 141 and the fourth hub forming surface 142 of the fourth machined blank 14 is 85 °.

5) And a fourth spinning process: the fourth green machining body 14 is continuously driven to rotate by the rotary pressing lower die 4 and the rotary pressing upper die 3, at the moment, the fourth forming cutter 8 of the rotary press performs horizontal feeding, the fourth hub forming surface 142 of the fourth green machining body 14 is pushed towards one side close to the outer surface of the rotary pressing lower die 4, the inner surface of the fourth hub forming surface 12 is attached to the outer surface of the rotary pressing lower die 4, and the thrust wheel rough type 15 is formed in the process.

And resetting the fourth forming tool 8 after the feeding is finished.

The feeding speed of the fourth forming cutter 8 is 2 mm/s; the feed force of the fourth forming tool 8 is: 200 KN.

The thrust wheel thick type 15 comprises a thrust wheel end surface 151 and a hub surface 152 which are integrally connected with each other, and an included angle alpha 4 between the thrust wheel end surface 151 and the hub surface 152 is 90 degrees.

A transition section 153 is provided between the thrust wheel end face 151 and the hub face 152.

The discharging process comprises the following steps:

6) and discharging: and taking down the formed rough shape 15 of the thrust wheel on the lower spinning die 4 and the upper spinning die 3, and warehousing.

By the design, the processing blank 1 can be preheated by adopting a preheating process, so that the toughness of the processing blank 1 is improved, the processing property and the use property of the processing blank 1 are further improved, the processing blank 1 is convenient to spin, the thick type 15 of the thrust wheel can be prepared by the spinning process, the use is convenient, the difficulty of the production process can be greatly reduced, and the physical and mechanical properties of the product are improved.

Example 2: the difference from embodiment 1 is that: the preheating time of the processing blank 1 is 1.3min, and the preheating temperature of the preheating processing blank is 450 ℃.

When spinning forming is carried out, the pressure of the spinning machine is 800 KN; the rotating speed is 1000 revolutions per minute, and the feeding speeds of the first forming cutter 5, the second forming cutter 6, the third forming cutter 7 and the fourth forming cutter 8 are all 2 mm/s; the feeding forces are all as follows: 200 KN.

Example 3: the difference from embodiment 1 is that: the preheating time of the processing blank 1 is 1.5min, and the preheating temperature of the preheating processing blank is 500 ℃.

When spinning forming is carried out, the pressure of the spinning machine is 800 KN; the rotating speed is 1400 revolutions per minute, and the feeding speeds of the first forming cutter 5, the second forming cutter 6, the third forming cutter 7 and the fourth forming cutter 8 are all 2 mm/s; the feeding forces are all as follows: 200 KN.

It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments described above without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.