CN111036754A

CN111036754A - Special tool for spinning process of T-shaped deep-stretching plate belt pulley

Info

Publication number: CN111036754A
Application number: CN201811183290.2A
Authority: CN
Inventors: 贾锋; 鄢荣清; 周欧亚; 谢圣蛟; 张威
Original assignee: Dongfeng Xiangyang Spinning Technology Co Ltd
Current assignee: Dongfeng Xiangyang Spinning Technology Co Ltd
Priority date: 2018-10-11
Filing date: 2018-10-11
Publication date: 2020-04-21

Abstract

A special tool for spinning technology of T-shaped deep drawing type plate belt pulley comprises a core mold clamp consisting of an upper core mold and a lower core mold, wherein the upper core mold is connected with an upper connecting disc, the lower core mold is connected with a lower connecting disc, and a first pre-forming spinning wheel, a second pre-forming spinning wheel, a first pre-forming spinning wheel and a second pre-forming spinning wheel are correspondingly arranged on respective spinning wheel shafts; the first preforming rotary wheel is a stacking wheel, the forming surface of the first preforming rotary wheel comprises an annular groove in the middle, an upper forming cylindrical surface on the upper part of the annular groove and a lower forming cylindrical surface on the lower part of the annular groove, and the diameter of the bottom surface of the upper forming cylindrical surface is larger than that of the bottom surface of the lower forming cylindrical surface; the second preforming spinning wheel is a flat wheel, and the forming surface of the second preforming spinning wheel is wavy. The invention solves the problems of uneven blank web plane caused by deep drawing, uneven material distribution on the upper and lower sides of the T-shaped deep-drawing type plate spinning belt pulley, web instability and non-groove-shaped problems, and has the advantages of high production efficiency, short processing time and stable product quality.

Description

Special tool for spinning process of T-shaped deep-stretching plate belt pulley

Technical Field

The invention relates to a production process of a belt pulley made of an inner plate of an automobile engine, in particular to a production process of a spinning belt pulley made of a T-shaped deep-drawing plate and a forming spinning wheel used for the process.

Background

At present, a T-shaped plate-made spinning belt pulley of an automobile engine mainly adopts a shape structure without stretching or shallow stretching, most of T-shaped belt pulleys with deep stretching shape structures can be realized by adopting the traditional casting and machining process, but the cast belt pulley has the advantages of heavy weight, large rotational inertia and high batch production cost, and is an important reason for preventing the automobile from realizing light weight.

The weight of plate-made spinning pulleys is generally only 1/2 for cast pulley steel, and plate-made spinning pulleys are widely used in automobiles to reduce the weight of the whole automobile at present, which is also the general trend of automobile development.

The belt pulley spinning is mainly a chipless processing mode, the existing deep drawing forming process is used for providing blanks for the spinning forming process to generate uneven web planes, the defects of uneven material distribution on the upper side and the lower side, web instability, non-groove shape and the like are easily generated in the spinning forming process for manufacturing the T-shaped deep drawing type plate belt pulley due to the uneven web planes, and the like, so that the belt pulley is invalid, especially the deep drawing type shape structure, and the T-shaped deep drawing type plate spinning belt pulley production cannot be successfully realized only by using the spinning forming process.

In order to solve the problems, the production of the T-shaped deep-drawing type plate spinning belt pulley can be realized by adopting the following steps: deep drawing → annealing heat treatment → spinning and forming to form the preliminary shape of the tooth form → turning the tooth form to meet the size requirement.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the special tool for the spinning process of the T-shaped deep-drawing type plate spinning belt pulley, which solves the problems of uneven material distribution on the upper side and the lower side, web stability loss and non-groove shape failure in the spinning process caused by the uneven plane of the web caused by deep drawing, reduces annealing heat treatment and the process of turning the tooth shape and effectively ensures the product quality.

The technical scheme adopted by the invention for solving the technical problems is as follows: the core mold clamp comprises an upper core mold and a lower core mold, wherein the upper core mold is connected with an upper connecting disc assembled on an upper main shaft of the spinning equipment, the lower core mold is connected with a lower connecting disc assembled on a lower main shaft of the spinning equipment, and a first preforming spinning wheel, a second preforming spinning wheel, a primary forming spinning wheel and a finishing spinning wheel are correspondingly arranged on respective spinning wheel shafts; the first preforming spinning wheel is a stacking wheel, the forming surface of the first preforming spinning wheel comprises an annular groove in the middle, an upper forming cylindrical surface on the upper portion of the annular groove and a lower forming cylindrical surface on the lower portion of the annular groove, and the diameter of the bottom surface of the upper forming cylindrical surface is larger than that of the bottom surface of the lower forming cylindrical surface, so that materials are distributed downwards, and the materials are uniformly distributed up and down. If the diameter of the bottom surface of the upper molding cylindrical surface is equal to or smaller than that of the bottom surface of the lower molding cylindrical surface, the upper edge of the web plate is divided more, and finally the tooth form of the product cannot meet the preset requirement; the second preforming rotary wheel is a flat wheel, the forming surface of the second preforming rotary wheel is a wave-shaped cylindrical surface, the forming surface of the second preforming rotary wheel is a wave-shaped surface capable of controlling the speed, the flow quantity and the flow direction of the material flowing up and down, and the purpose is finally to solve the problem of uniform flowing of the material; the forming surface of the primary forming rotary wheel is a shallow groove type, and the depth of the shallow groove type is smaller than the final required groove type of the product; the forming surface of the finishing spinning wheel is a deep groove shape, and the shape and the size of the deep groove shape correspond to the final required groove shape of the product.

Two side edges of the section of the wavy cylindrical surface are formed by alternately and sequentially connecting a plurality of positive arcs and negative arcs, and two adjacent positive arcs and negative arcs are tangent.

The diameter of the bottom surface of the upper molding cylindrical surface is 0.6-2mm larger than that of the bottom surface of the lower molding cylindrical surface.

The angle of the shallow groove shape is larger than the final required groove shape angle of the product.

An upper ejector is arranged in the upper core die, and a lower ejector is arranged in the lower core die.

The upper ejector and the lower ejector are both in a stepped cylindrical shape.

The positive circular arc corresponds to a peak, the reverse circular arc corresponds to a trough, the height difference between the peak and the trough is h, and h =0.2-1 mm.

And the upper end and the lower end of the forming surface of the second preforming rotary wheel are provided with belt opening structures matched with the corresponding positions of the products in shape.

And the belt yielding structure and the molding surface of the second preforming spinning wheel are in annular arc surface transition.

The belt abdicating structure is formed by curve rotation formed by a first initial outer side oblique line, a first positive arc end face, a first vertical straight line section, a second reverse arc end face and a second oblique line which are sequentially and tangentially connected.

The method adopts four-step rotary forming to enable materials to flow to a required position, reduce forming amount of each time, and avoid the loss of stability of a web, and the most important is the former three steps.

The invention solves the problems of uneven web plane caused by deep drawing, uneven material distribution on the upper and lower sides of the T-shaped deep-drawing type plate-made spinning belt pulley, web instability and non-groove-shaped problem, does not need annealing heat treatment and tooth-shaped turning process steps, realizes chipless stable spinning production and provides the qualified T-shaped deep-drawing type plate-made spinning belt pulley. The invention has the advantages of high production efficiency, short processing time, high yield and stable product quality.

Drawings

The invention is further described with reference to the following figures and detailed description.

FIG. 1 is a product produced by the present invention.

Fig. 2 is a schematic diagram of the tooling used in the spin-forming step ①.

Fig. 3 is a schematic view of the tooling used in the spin forming step ①.

Fig. 4 is a schematic diagram of the tooling used in the spin-forming step ②.

Fig. 5 is a schematic view of the tooling used in spin forming step ②.

Fig. 6 is a schematic diagram of the tooling used in spin forming step ③.

Fig. 7 is a schematic view of the tooling used in spin forming step ③.

Fig. 8 is a schematic diagram of the tooling used in spin forming step ④.

Fig. 9 is a schematic view of the tooling used in spin forming step ④.

Fig. 10 is a partial schematic view of a section of the forming surface (9 ') of the second preforming wheel (8').

Fig. 11 is a partially enlarged view of fig. 10.

Detailed Description

As shown in figure 1, 1 is a groove shape to be processed, the product is a rotating part, the height of a web plate corresponding to the groove shape from a bottom plane is 90mm, and the outer diameter phi is 214 mm.

As shown in figures 2 and 3, an upper core die 2 and a lower core die 3 form a core die clamp, the upper core die 2 is connected with an upper connecting disc 5 assembled on an upper main shaft of a spinning device, the lower core die 3 is connected with a lower connecting disc 4 assembled on a lower main shaft of the spinning device, a first preforming spinning wheel 3 ' is correspondingly arranged on a spinning wheel shaft, 1 ' is the shape of a plate base material before spinning and is arranged in the core die clamp, 2 ' is the shape formed by a spinning forming step ①, 3 ' is a first preforming spinning wheel, 4 ' is a middle groove of the first preforming spinning wheel, 5 ' is the upper shape (namely an upper forming cylindrical surface) of the first preforming spinning wheel, 6 ' is the lower shape (namely a lower forming cylindrical surface) of the first preforming spinning wheel, the first preforming spinning wheel 3 ' moves horizontally during operation to flow the base material along the upper shape and the lower shape of the preforming spinning wheel simultaneously, the flow of the base material is violent in the process, the flow of the base material is caused by uneven flow of the upper shape and the lower shape of the preforming spinning wheel, the raw material flows along the upper portion and the lower portion of the web plate, the lower portion of the preforming spinning wheel are controlled by uneven distribution of the upper web plate, the upper portion and the web plate material, the lower portion of the web plate 3 ' is controlled by uneven distribution, the uneven distribution of the web, the uneven distribution of the web plate, the web plate is controlled by the uneven distribution, the upper portion, the uneven distribution of the web plate, the web.

As shown in fig. 4 and 5, the upper core mold 2 and the lower core mold 3 form a core mold clamp, the upper core mold 2 is connected with an upper connecting disk 5 assembled on an upper main shaft of a spinning device, the lower core mold 3 is connected with a lower connecting disk 4 assembled on a lower main shaft of the spinning device, a second preforming spinning wheel 8 ' is correspondingly arranged on a spinning wheel shaft, 2 ' is the shape of a plate material before spinning in a spinning forming step ② after spinning in a spinning forming step ①, 7 ' is the shape after forming in a step ②, 9 ' is the shape on the second preforming spinning wheel 8 ', a forming surface 9 ' on the second preforming spinning wheel 8 ' is a wavy arc tangent cross-connection shape, the height difference between a crest and a trough of the shape needs to be accurately controlled, the height difference range is 0.2-1mm, if the height difference between the crest and the trough is too small, more intermediate materials are stored, the materials are not easy to flow upwards and downwards, the lack of the materials in the subsequent spinning step can cause that the upper and lower side tooth profiles are not formed, if the height difference between the crest and the trough of the spinning material is too small, the difference between the preformed material is not accurately distributed, and the lower spinning step, and the uniformity of the spinning material is not caused by the lack of the lower spinning control of the lower spinning wheel.

As shown in figures 6 and 7, an upper core die 2 and a lower core die 3 form a core die clamp, the upper core die 2 is connected with an upper connecting disc 5 assembled on an upper main shaft of a spinning device, the lower core die 3 is connected with a lower connecting disc 4 assembled on a lower main shaft of the spinning device, a primary forming spinning wheel 11 'is correspondingly arranged on a spinning wheel shaft, 7' is the shape of a plate material before spinning in a spinning forming step ③ after spinning in a spinning forming step ②, 10 'is the shape after forming in a step ③, and 12' is the groove shape on the primary forming spinning wheel 11 ', the angle of the groove shape 12' of the primary forming spinning wheel is larger than the angle of the groove shape finally required by the product, the depth is smaller than the groove shape finally required by the product, the angle of the spun product is larger than the angle to be finally reached, and the depth is smaller than the depth to be finally reached, if the material flows unevenly in a forming stage by directly spinning to the final size, and the non-forming state occurs at the part with less material storage, therefore, the shape of the groove 12 'on the primary forming spinning wheel 11' is more important, the material is promoted to.

As shown in figures 8 and 9, an upper core die 2 and a lower core die 3 form a core die clamp, the upper core die 2 is connected with an upper connecting disc 5 assembled on an upper main shaft of a spinning device, the lower core die 3 is connected with a lower connecting disc 4 assembled on a lower main shaft of the spinning device, a finishing spinning wheel 13 ' is correspondingly arranged on a spinning wheel shaft, 10 ' is the shape of a plate material after spinning in a spinning forming step ③ and before spinning in a

spinning forming step

④,1 is the shape after forming in a step ④, namely the final forming state, 14 ' is the forming groove shape on the finishing spinning wheel 13 ', and the forming groove shape 14 ' corresponds to the final required groove shape of a product.

As shown in fig. 10 and 11, the upper end and the lower end of the molding surface 9 'of the second preforming rotary wheel 8' are provided with a belt receding structure shape matched with the corresponding position shape of the product, the belt receding structure shape and the molding surface 9 'of the second preforming rotary wheel 8' are transited by adopting an annular arc surface R1, and the radius of a circle of the section of the annular arc surface R1 is 0-2 mm. The belt abdicating structure is formed by curve rotation consisting of a first initial outer oblique line A, a first normal arc end face R3, a vertical straight line section, a second reverse arc end face R2 and a second oblique line which are sequentially and tangentially connected. The number of the wave crests corresponds to 8 for the positive circular arc R4, the number of the wave crests corresponds to the number of the tooth bottoms of the product, the radius of the circle where the positive circular arc R4 is located is 2-6mm, the radius of the circle where the reverse circular arc R5 corresponds to the wave trough, the number of the wave troughs is 7, and the radius of the circle where the reverse circular arc R5 is located is 2-6 mm. The number corresponds to the number of the tooth tops of the product. The length of the vertical line segment is L1, L1=0-0.562mm, the length of the oblique line two is L2, and L2=0.329-0.929 mm. h is the difference between the wave crest and the wave trough, and the difference range is 0.2-1 mm.

Claims

1. The utility model provides a special frock of spinning technology of T type deep-drawing formula board system belt pulley which characterized in that: the core mould clamp comprises an upper core mould (2) and a lower core mould (3), wherein the upper core mould (2) is connected with an upper connecting disc (5) assembled on an upper main shaft of spinning equipment, the lower core mould (3) is connected with a lower connecting disc (4) assembled on a lower main shaft of the spinning equipment, and a first preforming spinning wheel (3 '), a second preforming spinning wheel (8'), a primary forming spinning wheel (11 ') and a finishing spinning wheel (13') are correspondingly arranged on respective spinning wheel shafts; the first preforming rotary wheel (3 ') is a stacking wheel, the forming surface of the first preforming rotary wheel (3 ') comprises an annular groove (4 ') positioned in the middle, an upper forming cylindrical surface (5 ') positioned at the upper part of the annular groove (4 '), and a lower forming cylindrical surface (6 ') positioned at the lower part of the annular groove (4 '), and the diameter of the bottom surface of the upper forming cylindrical surface (5 ') is larger than that of the bottom surface of the lower forming cylindrical surface (6 '); the second preforming rotary wheel (8 ') is a flat wheel, and the forming surface (9 ') of the second preforming rotary wheel (8 ') is a wave-shaped cylindrical surface; the forming surface of the primary forming rotary wheel (11 ') is a shallow groove type (12 '), and the depth of the shallow groove type (12 ') is smaller than the final required groove type of the product; the forming surface of the finishing spinning wheel (13 ') is a deep groove type (14 '), and the shape and the size of the deep groove type (14 ') correspond to the final required groove type shape of a product.

2. The special tool for the spinning process of the T-shaped deep-drawing plate pulley according to claim 1, wherein the special tool comprises: two side edges of the section of the wavy cylindrical surface are formed by alternately and sequentially connecting a plurality of positive arcs and negative arcs, and two adjacent positive arcs and negative arcs are tangent.

3. The special tool for the spinning process of the T-shaped deep-drawing plate pulley according to claim 1, wherein the special tool comprises: the diameter of the bottom surface of the upper forming cylindrical surface (5 ') is 0.6-2mm larger than that of the bottom surface of the lower forming cylindrical surface (6').

4. The special tool for the spinning process of the T-shaped deep-drawing plate pulley according to claim 1, wherein the special tool comprises: the angle of the shallow trough shape (12') is greater than the final required trough shape angle of the product.

5. The special tool for the spinning process of the T-shaped deep-drawing plate pulley according to claim 1, wherein the special tool comprises: an upper ejector is arranged in the upper core mold (2), and a lower ejector is arranged in the lower core mold (3).

6. The special tool for the spinning process of the T-shaped deep-drawing plate pulley according to claim 5, wherein the special tool comprises: the upper ejector and the lower ejector are both in a stepped cylindrical shape.

7. The special tool for the spinning process of the T-shaped deep-drawing plate pulley according to claim 1, wherein the special tool comprises: the positive circular arc corresponds to a peak, the reverse circular arc corresponds to a trough, the height difference between the peak and the trough is h, and h =0.2-1 mm.

8. The special tool for the spinning process of the T-shaped deep-drawing plate pulley according to claim 1, wherein the special tool comprises: the upper end and the lower end of the forming surface (9 ') of the second preforming rotary wheel (8') are provided with belt yielding structures matched with the corresponding positions of the products in shape.

9. The special tool for the spinning process of the T-shaped deep-drawing plate pulley according to claim 8, wherein the special tool comprises: and an annular arc surface (R1) is adopted for transition between the belt yielding structure and the forming surface (9 ') of the second preforming spinning wheel (8').

10. The special tool for the spinning process of the T-shaped deep-drawing plate-made belt pulley according to claim 8 or 9, wherein the special tool comprises: the belt abdicating structure is formed by curve rotation consisting of a first initial outer oblique line (A), a first normal-arc end face (R3), a vertical straight line section, a second reverse-arc end face (R2) and a second oblique line which are sequentially and tangentially connected.