CN205200426U - Mould structure of driving cog intense beam intermediate tooth shape - Google Patents

Abstract

The utility model relates to a mold structure with an intermediate tooth shape of transmission teeth, which includes a main mold unit and a die unit. The main mold inner mold is provided at the front end of the mold shell, the main mold inner pad is provided at the rear end of the main mold shell, and the main mold thimble and the main mold ejector pin are arranged at the center of the main mold inner pad. The main mold thimble and the main mold top The rods are offset, the main mold inner mold is provided with a main mold insert, the main mold insert is a molding cavity, and the die pusher is provided around the die ejector. The cross section of the punch pusher is hollow and square. There is a locking groove, and the main formwork shell is provided with threaded holes and screws for fixing the inner mold of the main formwork. The material can refine the internal grains of the product and have a complete metal flow line through cold heading extrusion deformation, so that the strength and plasticity of the product are better, the mechanical properties are improved, the processing procedure is reduced, the material is saved, the processing efficiency is improved, and the production is effectively reduced. cost.

Description

The mold structure of the transmission tooth and the intermediate tooth shape

technical field

The utility model relates to cold heading forming in the field of mechanical processing and manufacturing, in particular to a mold structure of a drive tooth with a middle tooth shape.

Background technique

At present, the transmission gear of the car door is the main part of automobile production, and the production quality of the transmission gear also affects the safety of the entire vehicle operation. The production of the transmission gear usually requires multiple processes, usually after forging through a die, and then milling. The tooth shape and square shape are processed by the method, and the excess waste is removed during the milling process to meet the requirements, so that the internal structure of the transmission tooth processed in this way is not streamlined and the strength is not high, which affects the mechanical properties of the transmission tooth, thus reducing the mechanical properties of the transmission tooth. The service life and scope of the product, and the need for milling operations to mill more waste and low production efficiency, resulting in waste, which greatly increases the production cost of the product, which does not meet the requirements of the enterprise to reduce costs.

Contents of the invention

The technical problem to be solved by the utility model is to provide a mold structure with a strong middle tooth shape of the transmission tooth, which can ensure that the internal structure of the transmission tooth is streamlined, improve the strength and mechanical properties, prolong the service life, improve product quality, and save materials.

The technical solution adopted by the utility model to solve the technical problem is: a mold structure with a transmission tooth strong beam middle tooth shape, including a main mold unit and a die unit, and the die unit includes a die shell. Die thimbles are provided inside, the main mold unit includes a main mold shell, an inner mold of the main mold is provided at the front end of the main mold shell, and an inner cushion block of the main mold is provided at the rear end of the main mold shell, A main mold thimble and a main mold ejector pin are arranged at the center of the inner pad of the main mold. The inside of the main mold insert is a molding cavity, and a die push tube is arranged around the punch thimble. The cross section of the punch push tube is hollow and square, and the main mold shell is provided with a locking groove. There are three locking grooves, and threaded holes and screws for fixing the inner mold of the main mold are provided on the main mold shell.

More specifically, the inner pad of the main mold includes a first inner pad of the main mold and a second inner pad of the main mold. In the center of the first inner pad of the main mold, there is a hole for the thimble of the main mold to pass through. The ejector pin hole of the first inner block of the main form, and the ejector pin hole of the main form for the ejector pin of the main form to pass through are provided in the center of the second inner block of the main form.

More specifically, the bottom of the die thimble is provided with a die pad.

More specifically, both the main mold ejector pin and the die ejector pin include a stem and a head.

More specifically, the rear part of the main formwork shell is provided with a rear cushion block of the main formwork.

The beneficial effect of the utility model is: after adopting the above-mentioned mold structure, the material can refine the internal crystal grains of the product and have a complete metal flow line through the cold heading extrusion deformation, so that the strength and plasticity of the product are better, and the mechanical properties are improved. Then adopt the milling processing method to reduce processing procedures, save materials, improve processing efficiency, and effectively reduce production costs.

Description of drawings:

Fig. 1 is the process molding schematic diagram of the present utility model;

Fig. 2 is the mold structural representation of step S2 of the present utility model;

Fig. 3 is the mold structure schematic diagram of the utility model step S3;

Fig. 4 is the mold structural representation of step S4 of the present utility model;

Fig. 5 is the mold structural representation of step S5 of the present utility model;

Fig. 6 is the mold structural representation of step S6 of the present utility model;

Fig. 7 is a schematic diagram of the mold structure in step S7 of the present invention.

In the figure: 1, 3, die unit; 2, 4, main die unit; 11, 31, die shell; 12, 32, die thimble; 13, die insert; 33, die push tube; 21, 41, main die Shell; 22, 42, inner mold of main mold; 23, 43, thimble of main mold; 24, 44, cushion block of main mold; 34, cushion block of punching die; 45, inner cushion block of main mold; , the first insert of the main mold; 48, the second insert of the main mold; 49, the third insert of the main mold; 421, the first inner mold of the main mold; 422, the second inner mold of the main mold; 423, the third of the main mold Inner mold; 451, the first inner cushion block of the main mold; 452, the second inner cushion block of the main mold.

detailed description:

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figure 1, a cold heading forming process of transmission teeth, the steps of the cold heading forming process are:

S1, cutting wire;

S2, the upper beam rod;

S3, the lower beam rod;

S4, the middle step of cold heading;

S5. The two ends are shrunk into a square and the middle step is upset for the first time;

S6. Square shaping at both ends and upsetting the middle step for the second time;

S7, forcibly shrinking the middle tooth profile.

The wire is work hardened.

As shown in Figure 7, a mold structure with a strong beam intermediate tooth shape in step S7 includes a main mold unit 4 and a die unit 3, and the die unit 3 includes a die shell 31, and a die shell 31 is provided inside the die shell 31. Die thimble 32, the main mold unit 4 includes a main mold shell 41, the main mold inner mold 42 is provided at the front end of the main mold shell 41, and the main mold inner mold 42 is provided at the rear end of the main mold shell 41. Pad block 45, in the center of the pad 45 in the main mold, a main mold ejector pin 43 and a main mold ejector pin 46 are arranged, and the main mold ejector pin 43 is offset against the main mold ejector pin 46, and the main mold inner mold 42 is provided with a main mold insert 47, and the inside of the main mold insert 47 is a molding cavity, and a die push tube 33 is arranged around the punch thimble 32, and the cross section of the punch push tube 33 is hollow. Square, described main formwork 41 is provided with lock groove 48, and described lock groove 48 is three, is provided with on described main formwork 41 and is used for fixing the threaded hole 49 of main mold inner mold 42 and Screw; the main mold inner spacer 45 includes the first main mold inner spacer 451 and the main mold second inner spacer 452, and the center of the main mold first inner spacer 451 is provided with a main mold thimble 43 The thimble hole of the first inner cushion block of the main mold passed through, and the main mold ejector pin hole for the main mold ejector pin 46 to pass through is provided at the center of the second inner cushion block 452 of the main mold; the described die ejector pin 32 Die pads are provided at the bottom; the main die thimble 42 and die thimble 32 both include a rod and a head; the rear of the main die shell 41 is provided with a main die rear pad 44 .

As shown in Figures 2 to 7, each station is divided into a die unit 1 and a main die unit 2. The die unit 1 is composed of a die shell 11, a die insert 13 and a die thimble 12, and the main die unit 2 has a main die shell 21. , main mold inner mold 22, main mold thimble 23 and main mold cushion block 24 and other parts. Among them, the mold is completed by the clamp, and all the molds are installed on the cold heading machine.

As shown in Figure 2, the die unit of the upper beam bar moves as a whole during the working process and the die thimble pushes the part into the main mold forming cavity; the main die unit is fixed on the machine, the main die thimble and the main die ejector pin are moving, starting To push out parts; as shown in Figure 3, the die unit of the lower beam rod moves as a whole during the working process, and the die thimble, die cushion block and die shell move relatively, and play the role of ejecting parts in the die forming cavity; the main die The unit is fixed on the machine, and the ejector pin of the main die and the ejector pin of the main die are moving to play the role of pushing out the parts; as shown in Figure 4, the die unit of the middle step of the cold heading moves as a whole during the working process, and the ejector pin of the die, the die pad and the The relative movement of the die shell plays the role of ejecting the parts in the die forming cavity. The main die unit is fixed on the machine, and the main die ejector pin and the main die ejector pin are moving to play the role of ejecting the parts; the two ends are shown in Figure 5 The die unit, which shrinks into a square and upsets the middle step for the first time, moves as a whole during the working process, and the ejector pin of the die pushes the part into the cavity of the main model, where the ejector pin material is formed in the mold. 4 are consistent; Figure 6 and Figure 7 have the same movement process as above; as shown in Figure 7, the die unit uses the die thimble and the die push tube to push the blank processed in Figure 6 into the strong beam gear of the main die unit, and the die push tube is square Matching the square of the blank in step S5 can play a limiting role, ensuring that the square does not rotate, and the combination of threaded holes and screws ensures that the inner mold of the main mold does not rotate, and ensures that the formed tooth shape will not change. The machine table is fixed by three lock slots, which can be rotated to fine-tune the fixed position.

It should be emphasized that: the above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model in any form. Any simple modification, equivalent change and Modifications still belong to the scope of the technical solution of the utility model.

Claims (5)

1. the mould structure of the middle profile of tooth of driving cog intense beam, comprise main form unit (4) and punch die unit (3), described punch die unit (3) comprises punch die shell (31), punch die thimble (32) is provided with in described punch die shell (31) inside, described main form unit (4) comprises main formwork (41), main mould internal mold (42) is provided with in described main formwork (41) interior forward end, cushion block (45) in main mould is provided with in described main formwork (41) rear end, in described main mould, cushion block (45) center is provided with main mould thimble (43) and main mould push rod (46), described main mould thimble (43) and main mould push rod (46) offset, it is characterized in that, described main mould internal mold (42) is provided with main mould insert (47), be forming cavity in described main mould insert (47), described punch die thimble (32) is provided with punch die ejector sleeve (33) around, the cross section of described punch die ejector sleeve (33) is the square of hollow, described main formwork (41) is provided with locked groove (48), described locked groove (48) is three, described main formwork (41) is provided with the screwed hole (49) for fixing main mould internal mold (42) and screw.

2. the mould structure of the middle profile of tooth of driving cog intense beam according to claim 1, it is characterized in that, in described main mould, cushion block (45) to comprise in main mould first cushion block (452) in cushion block (451) and main mould second, in described main mould first, cushion block (451) center is provided with cushion block centre hole in the main mould first that passes for main mould thimble (43), and in described main mould second, cushion block (452) center is provided with the main mould jogger hole passed for main mould push rod (46).

3. the mould structure of the middle profile of tooth of driving cog intense beam according to claim 1, is characterized in that, described punch die thimble (32) bottom is provided with punch die cushion block.

4. the mould structure of the middle profile of tooth of driving cog intense beam according to claim 1, it is characterized in that, described main mould thimble (43) and punch die thimble (32) include bar portion and head.

5. the mould structure of profile of tooth in the middle of driving cog intense beam according to claim 1, is characterized in that, described main formwork (41) rear portion is provided with cushion block (44) after main mould.