Steel plate blank structure for forging connecting rod

Abstract

The utility model provides a steel plate blank structure for forging a connecting rod. The steel plate blank structure comprises a steel plate blank subjected to one-time forging machining. The steel plate blank comprises a rod part forging area which is separated in advance and free forging areas which are oppositely arranged at the two ends of the rod part forging area; the two free forging areas are distributed at the two ends of the rod part forging area in a mirror image mode, and a material distribution identification structure is arranged between the rod part forging area and the corresponding free forging area. According to the forging device, the rod part forging area and the free forging area are separated in advance, precise separation is achieved, the rod part forging area can be rapidly forged after the steel plate blank is heated, the forging area can be precisely obtained through the material separation identification structure, the yield is increased, and therefore the manufacturing cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal hot forming, in particular to a steel plate blank structure for connecting rod forging. BACKGROUND

[0002] The automobile connecting rod is used to connect two shock absorbers arranged on the two sides of the automobile, which functions to greatly reduce the impact from the road, reduce the jolt force, and prolong the service life of the automobile parts. Due to the characteristics of the slender rod part and no subsequent processing, the connecting rod product is usually forged by a round steel with a diameter of 90 mm. The quality control in the production process of the existing processing technology is very difficult, and the first forging qualified rate is less than 60%, and the proportion of the second forging rework adjustment reaches 40%. The main reason for the low qualified rate of the existing technology is that the structure of the blank is not conducive to the processing of the subsequent process. As shown in the reference Figure 1 , the round steel needs to be divided into the rod part area 20 and the first forging part 10 and the second forging part 30 after heating, so as to facilitate the subsequent processing of the first forging part 10 and the second forging part 30. On the one hand, due to the time required for material separation, the material temperature will be reduced to below the forging temperature during the separation process, so that it cannot be formed by one-time forging; on the other hand, due to the requirement of no processing of the rod part area 20, once the material separation is not accurate, the rod part size will not meet the standard, resulting in material rework. The existing problems of the existing technology make the production efficiency of the connecting rod forging low and the production cost high. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a steel plate blank structure for connecting rod forging, which improves the yield rate and reduces the manufacturing cost by precise material separation.

[0004] The steel plate blank structure for connecting rod forging provided by the present application comprises: a steel plate blank for one-time forging processing; the steel plate blank comprises a rod part forging area and free forging areas oppositely arranged at both ends of the rod part forging area; wherein the two free forging areas are mirror image distributed at both ends of the rod part forging area, and a material separation identification structure is arranged between the rod part forging area and the corresponding free forging area.

[0005] In the present application, the rod part forging area and the free forging area are pre-separated, which realizes precise separation and enables the rod part forging area to be forged quickly after the steel plate blank is heated. The forging area can be accurately obtained through the material separation identification structure, thereby improving the yield rate and reducing the manufacturing cost.

[0006] In a specific implementation scheme, the rod part forging area and the two free forging areas are formed by the same steel mold casting processing. An integrated steel plate blank structure is formed, which has precise area division.

[0007] In one specific implementation, both of the free forging areas are circular forging areas. The subsequent finishing requirements are met.

[0008] In one specific implementation, the diameters of both of the free forging areas are not less than 118 mm. The precision requirements are met.

[0009] In one specific implementation, the thickness of the steel plate blank is 50 mm. The overall forging requirements are met.

[0010] In one specific implementation, the length of the rod forging area is not less than 250 mm. The forging stretching requirements are met.

[0011] In one specific implementation, the two free forging areas are a first forging area and a second forging area, respectively; and the material distribution identification structure includes a first V-shaped groove between the first forging area and a first end of the rod forging area, and a second V-shaped groove between the second forging area and a second end of the rod forging area. Through the material distribution identification structure, the forging area information can be accurately obtained, and the secondary processing caused by cooling can be effectively reduced.

[0012] In one specific implementation, the narrow throat width of the first V-shaped groove and / or the second V-shaped groove is less than the width of the rod forging area. The material distribution identification is obvious. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the material distribution of the existing 90 round steel blank;

[0014] Figure 2 It is a schematic diagram of the steel plate blank structure for connecting rod forging provided by the embodiment of the application;

[0015] Figure 3 It is a top view of the connecting rod blank provided by the embodiment of the application;

[0016] Figure 4 It is a side view of the connecting rod blank provided by the embodiment of the application.

[0017] REFERENCE NUMERALS:

[0018] First forging part-1, rod area-2, second forging part-3;

[0019] First forging area-10, second forging area-20, rod forging area-30, first V-shaped groove-40, second V-shaped groove-50;

[0020] First processing position-100, second processing position-200, rod-300. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to specific embodiments and drawings.

[0022] It should be noted that, unless otherwise defined, technical terms or scientific terms used in one or more embodiments of the present disclosure should be understood as their ordinary meaning to those skilled in the art to which the present disclosure belongs. The terms "first", "second" and the like used in one or more embodiments of the present disclosure do not represent any order, number or importance, but are only used to distinguish different components. The terms "include" or "contain" and the like mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and the like are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0023] In order to facilitate the understanding of the structure of the steel blank for forging the connecting rod provided by the embodiments of the present application, the application scenario of the connecting rod is first described. The connecting rod of the automobile is used to connect two shock absorbers arranged on the two sides of the automobile. Its function is to greatly reduce the impact from the road, and also to reduce the jolt force and prolong the service life of the automobile parts. Due to the characteristics of the slender rod part and the subsequent non-processing, the connecting rod product is usually forged by round steel with a diameter of 90 mm. The quality control in the production process of the existing processing technology is very difficult, and the first forging qualified rate is less than 60%, and the proportion of secondary forging rework adjustment reaches 40%. The main reason for the low qualified rate of the prior art is that the structure of the blank is not conducive to the processing of the subsequent process. As shown in Figure 1 , the round steel needs to be divided into the rod part area 20 and the first forging part 10 and the second forging part 30 at the two ends after heating, so as to facilitate the subsequent processing of the first forging part 10 and the second forging part 30. On the one hand, due to the time required for material division, the material temperature will decrease below the forging temperature during the material division process, so that it cannot be formed by one-time forging; on the other hand, due to the non-processing requirement of the rod part area 20, once the material division is not accurate, the rod part size will not meet the standard, resulting in material rework. The problems existing in the prior art make the production efficiency of the connecting rod forging low and the production cost high. In view of this, the present application provides a steel blank structure for forging a connecting rod, which improves the yield rate and reduces the manufacturing cost by precise material division.

[0024] Reference Figure 2As shown in the illustration, the steel plate blank structure for forging the connecting rod provided in this application embodiment includes a steel plate blank processed in one forging process. This application uses steel plate as the blank material, overcoming the drawback of the previous method of using 90mm round steel which made material segmentation difficult, while maintaining the same material cost. The steel plate blank is segmented during casting, ensuring rapid processing according to the segmented areas during subsequent processing. This achieves a high yield rate for connecting rod blanks produced in one casting after heating, shortening manufacturing time, improving cost efficiency, and reducing manufacturing costs.

[0025] In achieving the purpose of pre-dividing the material, this application pre-divides the steel plate blank into regions during casting. The steel plate blank includes a pre-divided rod forging zone 30 and free forging zones located at opposite ends of the rod forging zone 30. The rod forging zone 30 does not require subsequent finishing; therefore, during hot forging, it is necessary to ensure that the rod forging zone 30 forms a slender standard dimension (e.g., ...). Figure 3 and Figure 4 (as shown in the image).

[0026] The steel plate blank in this application has a thickness of 50mm, meeting the requirements for integral forging. And after forging, it forms a shape as shown... Figure 3 and Figure 4 The connecting rod blank shown has a rod portion 300 with a length of 1.7 meters and a length of 40mm × 20mm, as well as a first machining position 100 at the first end of the rod portion 300 and a second machining position 200 at the second end of the rod portion 300.

[0027] To better delineate the forging zone 30 and the two free forging zones, the two free forging zones are mirror images of each other at both ends of the forging zone 30, and a material separation marking structure is provided between the forging zone 30 and the corresponding free forging zones. This material separation marking structure can accurately separate materials, reduce errors, maintain the required weight for each material, and thus improve the yield rate.

[0028] In this application, the rod forging zone 30 and the two free forging zones are cast and machined from the same steel mold, forming a one-piece steel plate blank structure with precise area division. Both free forging zones are circular forging zones, meeting the requirements for subsequent finishing.

[0029] In one specific embodiment of this application, the diameters of both free forging zones are not less than 118 mm, improving precision requirements. The length of the rod forging zone 30 is not less than 250 mm, meeting forging tensile requirements. It can be seen that when using steel plate blanks for heated forging, precise forging of the rod forging zone 30 and the two free forging zones is achieved through material separation markings, reducing material separation time, avoiding heat loss, and improving the yield of one-time forging.

[0030] And, in order to better highlight the distribution effect, the two free forging zones in the application are respectively a first forging zone 10 and a second forging zone 20; the distribution identification structure comprises: a first V-shaped groove 40 opened between the first forging zone 10 and the first end of the rod forging zone 30, and a second V-shaped groove 50 opened between the second forging zone 20 and the second end of the rod forging zone 30. Through the distribution identification structure, the forging area information can be accurately obtained, and the secondary processing caused by cooling can be effectively reduced. The narrow throat width of the first V-shaped groove 40 and / or the second V-shaped groove 50 is smaller than the width of the rod forging zone 30. The distribution identification is obvious.

[0031] In the application, by pre-distributing the rod forging zone 30 and the free forging zone, precise separation is realized, and after the steel plate blank is heated, the rod forging zone 30 can be forged quickly, the forging area can be accurately obtained through the distribution identification structure, the yield is improved, and the manufacturing cost is reduced.

[0032] It should be understood by those skilled in the art that the above discussion of any of the embodiments is merely exemplary and is not intended to suggest the scope of the disclosure (including the claims) is limited to these examples; under the concept of the disclosure, the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the above one or more embodiments of the specification, which are not provided in detail for the sake of brevity.

[0033] In addition, in order to simplify the description and discussion, and so as not to make one or more embodiments of the specification difficult to understand, the known power / ground connections of other components can or can not be shown in the provided drawings. In addition, the devices can be shown in the form of block diagrams in order to avoid making one or more embodiments of the specification difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented one or more embodiments of the specification (i.e. these details should be fully within the understanding of those skilled in the art). With the specific details described to describe the exemplary embodiments of the disclosure, it is obvious to those skilled in the art that one or more embodiments of the specification can be implemented without these specific details or with changes to these specific details. Therefore, these descriptions should be considered as illustrative rather than limiting.

[0034] One or more embodiments of the specification are intended to cover all such alternatives, modifications and variations falling within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent replacements, improvements, etc. made in the spirit and principles of one or more embodiments of the specification should be included within the protection scope of the disclosure.

Claims

1. A structure of a steel plate blank for forging a connecting rod, comprising a steel plate blank processed by one-time forging; characterized in that, the steel plate blank comprises a rod forging area and two free forging areas arranged at two ends of the rod forging area respectively; the two free forging areas are mirror images arranged at the two ends of the rod forging area, and a material distribution mark structure is arranged between the rod forging area and the corresponding free forging area.

2. The connecting rod forged steel plate blank configuration of claim 1 wherein, the rod forging area and the two free forging areas are formed by casting with the same steel mold.

3. The connecting rod forged steel plate blank configuration of claim 2 wherein, the two free forging areas are both circular structures.

4. The connecting rod forged steel plate blank configuration of claim 3 wherein, the diameters of the two free forging areas are both not less than 118 mm.

5. The connecting rod forged steel plate blank configuration of claim 1 wherein, the thickness of the steel plate blank is 50 mm.

6. The connecting rod forged steel plate blank configuration of claim 5 wherein, the length of the rod forging area is not less than 250 mm.

7. The connecting rod forged steel plate blank configuration of claim 3 wherein, the two free forging areas are a first forging area and a second forging area respectively; the material distribution mark structure comprises a first V-shaped groove arranged between the first forging area and the first end of the rod forging area, and a second V-shaped groove arranged between the second forging area and the second end of the rod forging area.

8. The connecting rod forged steel plate blank configuration of claim 7, wherein, the narrow throat width of the first V-shaped groove and / or the second V-shaped groove is less than the width of the rod forging area.

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