A metal workpiece upsetting device

Abstract

The present invention relates to the field of workpiece processing, and specifically to a metal workpiece upsetting device. The technical solution of the present invention is: a metal workpiece upsetting device, comprising: a punch and a die respectively fixedly connected to the driving shaft and the driven shaft of a driving device, the punch and the die can be engaged with each other for processing the workpiece; when the punch and the die are engaged with each other, there is a workpiece clearance space between the first end face of the punch and the first end face of the die, and the clearance space is located downward from the first end face of the punch. The present invention improves the punch and the die used in upsetting, so that during the processing of the workpiece, the metal material can flow in a set direction during upsetting, thereby avoiding the generation of fillet creases on the workpiece.

Description

Technical Field

[0001] The invention relates to the field of workpiece processing, and in particular to a metal workpiece upsetting device. Background Art

[0002] The material of precision hub parts of new energy vehicle engines is usually high-strength alloy steel. Figure 1 As shown in the figure, the small R angle of the first fillet of the automobile engine precision hub is required to be less than 1.5mm, so it is generally processed by upsetting technology. Due to the high strength of high-strength alloy steel, when the conventional deep drawing process is used for upsetting, after the workpiece is pressed by the die and the punch, the upward force of the lower support plate of the punch, the downward force of the die, and the interaction between the die and the punch, such as the die and the inner and outer clamps of the die, the counterforce generated by the interaction between the die and the punch, will hinder the flow of material inside the workpiece during processing. The material flow resistance is large, which easily leads to a fold of more than 0.5mm in length at the second fillet and a fold of more than 0.3mm in length at the third fillet. The fold will reduce the torsion resistance of the part and fail to meet the product quality requirements. Summary of the invention

[0003] The present invention is to solve at least one defect or problem existing in the background technology and provide a metal workpiece upsetting device.

[0004] The technical solution of the present invention is: a metal workpiece upsetting device, comprising:

[0005] A male die and a female die are respectively fixedly connected to the driving shaft and the driven shaft of the driving device, and the male die and the female die can be engaged with each other for processing a workpiece;

[0006] When the male mold and the female mold are engaged with each other, there is a workpiece clearance space between the first end face of the male mold and the first end face of the female mold, and the clearance space is located below the first end face of the male mold.

[0007] Furthermore, the clearance space includes a clearance groove, which is located at the connection between the first end surface of the punch and the second end surface of the punch and extends downward toward the first end surface of the punch.

[0008] Furthermore, the give way groove is an annular groove structure surrounding the connection between the first end face of the punch and the second end face of the punch, and the width of the give way groove is greater than or equal to 1 / 2 of the wall thickness of the workpiece, and the depth is greater than or equal to 1 / 4 of the wall thickness of the workpiece.

[0009] Furthermore, the clearance space also includes a limit platform, and the limit platform is located on the outer side of the connection between the first end face of the punch and the second end face of the punch.

[0010] Furthermore, the limiting platform is a raised structure surrounding the outer side of the giving way groove.

[0011] Furthermore, the relief space further includes a small tapered surface with a slope, and the small tapered surface is connected to the limiting platform.

[0012] Furthermore, the relief space includes a material blocking port, the material blocking port is connected to the small tapered surface, and the material blocking port forms a limiting surface for the outer edge of the workpiece.

[0013] Furthermore, the first end face and the second end face of the female die are connected by an inclined opening. When the male die and the female die are engaged with each other, the inclined opening is located above the relief space.

[0014] Furthermore, the slope of the small tapered surface is greater than or equal to 8°.

[0015] The present invention has the following beneficial effects:

[0016] 1. Improve the local features of the male die and the female die used in upsetting, so that there is a relief space for the workpiece when the male die and the female die are engaged with each other. During the processing of the workpiece, when upsetting, the metal material can flow in the set direction, avoiding the generation of rounded corner creases on the workpiece.

[0017] 2. A relief groove, a limiting platform, a small tapered surface and a material blocking port are provided on the first end face of the male die. An inclined opening is provided at the connection between the first end face and the second end face of the female die, so that the relief groove, the limiting platform, the small tapered surface, the material blocking port and the inclined opening form a relief space for the outer edge of the workpiece, effectively avoiding the resistance of material flow during upsetting of the workpiece, and further avoiding the generation of creases at the second rounded corner and the third rounded corner during upsetting processing of the workpiece, thereby reducing the quality of the workpiece.

[0018] To make the above and other objects, features and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of processing a workpiece by the upsetting technology of a workpiece in the prior art;

[0020] Figure 2 Schematic diagram of the creases generated during the processing of a workpiece by the upsetting technology of a workpiece in the prior art;

[0021] Figure 3 Schematic diagram of the structures of the male die and the female die in an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the internal material flow direction of a part of the workpiece during upsetting of the workpiece in an embodiment of the present invention;

[0023] Figure 5 Schematic diagram of the male die and the female die being engaged with each other to process the workpiece in an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the local enlargement of the workpiece processed by the male die and the female die engaging with each other in an embodiment of the present invention;

[0025] Figure 7 Schematic diagram of the change of the workpiece before and after processing in an embodiment of the present invention.

[0026] Reference numerals:

[0027] Male die: 10, the first end face of the male die; 11, small taper surface; 12, relief groove; 13, limiting platform; 14, blanking port; 15, the second end face of the male die

[0028] Female die: 20, the first end face of the female die; 21, inclined opening; 25, the second end face of the female die

[0029] Workpiece: 31, the first end face of the workpiece; 32, the second end face of the workpiece; 33, the third end face of the workpiece; 34, the fourth end face of the workpiece; 35, the first fillet; 36, the second fillet; 37, the third fillet Detailed implementation manners

[0030] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.

[0031] As Figure 2 , to avoid the generation of the fold seams of the fillets 2 and 3, some manufacturers complete the processing of the precision shaft hub parts of the new energy vehicle engine through the method of forging blanks and then turning processing. The blank shape of this kind of workpiece processing technology is easy to achieve, but the material utilization rate is low, and the defective rate is relatively high during the processing of the forging process.

[0032] As Figures 3 to 7 , the present invention provides a metal workpiece upsetting device, including: a male die and a female die respectively fixedly connected to the driving shaft and the driven shaft of the driving device, and the male die and the female die can engage with each other for processing the workpiece; when the male die and the female die engage with each other, there is a workpiece relief space between the first end face 10 of the male die and the first end face 20 of the female die, and the relief space is located below the first end face 10 of the male die. Under the control of the driving device, the male die and the female die respectively fixedly connected to the driving shaft and the driven shaft are aligned and engaged with each other, and the outer edge of the workpiece fixedly placed on the male die is positioned in the relief space. The relief space provides a smooth flow direction for the materials on the inner sides of the first end face 31, the second end face 32, the third end face 33 and the fourth end face 34 of the workpiece, avoiding the generation of workpiece fillet fold seams.

[0033] The present invention improves the upsetting die, that is, improves the local features of the punch and die used in the upsetting process, so that the punch and die have a workpiece clearance space when they are engaged with each other, so that the metal material can flow in a set direction during the processing of the workpiece during the upsetting process, and the generation of rounded corner creases of the workpiece is avoided. Figures 4 to 7 Schematic diagram of the material flow direction inside the workpiece during the upsetting process of the workpiece. It should be emphasized that the "rounded corners" mentioned in the present invention without serial numbers or distinguishing names generally include the first rounded corner 35, the second rounded corner 36, and the third rounded corner 37. It should be noted that the upsetting process of the workpiece processing in the present invention is to perform cold upsetting processing on the workpiece.

[0034] In one embodiment of the present invention, the clearance space includes a clearance groove 12, which is located at the connection between the first end face 10 of the punch and the second end face 15 of the punch, and extends downward toward the first end face 10 of the punch. The clearance groove 12 is an annular groove structure surrounding the connection between the first end face 10 of the punch and the second end face 15 of the punch, and the width of the clearance groove is greater than or equal to 1 / 2 of the wall thickness of the workpiece, and the depth is greater than or equal to 1 / 4 of the wall thickness of the workpiece. When the punch and the die are engaged, the clearance groove 12 is located below the connection between the first end face 31 of the workpiece and the second end face 32 of the workpiece. The clearance groove 12 allows the material on the inner side of the second end face 32 of the workpiece to flow downward smoothly during the upsetting process of the workpiece, so that the second fillet 36 of the workpiece will not produce a crease.

[0035] In one embodiment of the present invention, the clearance space further includes a limit platform 13, which is located outside the connection between the first end face 10 of the punch and the second end face 15 of the punch. The limit platform 13 is a protruding structure surrounding the outside of the clearance groove 12. When the punch and the die are engaged, the limit platform 13 has a limiting effect on the third end face 33 of the workpiece, so that the material inside the third end face 33 of the workpiece can flow upward smoothly during the upsetting of the workpiece, so as to fill the first fillet 35 of the workpiece, so that the fillet of the workpiece after processing meets the requirement of a small R angle.

[0036] In one embodiment of the present invention, the clearance space also includes a small tapered surface 11 with a slope, and the small tapered surface 11 is connected to the limit platform 13. The slope of the small tapered surface 11 is greater than or equal to 8°. The improvement of the slope of the taper angle is conducive to the flow of materials. The clearance space also includes a material stopper 14, which is connected to the small tapered surface 11, and the material stopper 14 constitutes a limit surface of the outer edge of the workpiece. The first end face 20 of the die and the second end face 25 of the die are connected by an oblique opening 21, and the oblique opening 21 is located on the upper side of the clearance space when the punch and the die are engaged with each other. When the punch and the die are engaged, the small tapered surface 11, the oblique opening and the oblique opening 21 constitute the clearance space of the outer edge of the workpiece, so that the upper side material of the outer edge of the workpiece can flow smoothly to the right, avoiding the formation of creases at the third fillet 37 of the workpiece.

[0037] The improvement of the present invention breaks through the limitations of the conventional upsetting process. Through the fine design of the upsetting die, the flow direction of the material during the upsetting process is changed, and the application of high-strength steel small-radius upsetting crease-free technology is realized, replacing the existing forging + turning workpiece production process, and has a positive effect on the production of high-precision parts, the production efficiency of high-strength alloy steel processing into workpieces, reducing costs, and improving product quality stability.

[0038] The present invention has the following beneficial effects:

[0039] 1. Improve the local features of the punch and die used in upsetting so that there is space for the workpiece to make way when the punch and die are engaged with each other, so that during the processing of the workpiece, the metal material can flow in the set direction during upsetting, avoiding the generation of rounded creases at the workpiece corners.

[0040] 2. A clearance groove 12, a limit platform 13, a small tapered surface 11 and a material stopper 14 are provided on the first end face 10 of the punch, and an oblique opening 21 is provided at the connection between the first end face 20 of the die and the second end face 25 of the die, so that the clearance groove 12, the limit platform 13, the small tapered surface 11, the material stopper 14 and the oblique opening 21 constitute a clearance space at the outer edge of the workpiece, effectively avoiding the resistance to material flow during the upsetting of the workpiece, and further avoiding the generation of creases at the second fillet 36 and the third fillet 37 of the workpiece during the upsetting process, thereby reducing the quality of the workpiece.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A metal workpiece upsetting device, characterized in that, include: A male die and a female die are respectively fixedly connected to the driving shaft and the driven shaft of the driving device, and the male die and the female die can be engaged with each other for processing a workpiece; When the male mold and the female mold are engaged with each other, there is a workpiece clearance space between the first end face of the male mold and the first end face of the female mold, and the clearance space is located downward from the first end face of the male mold; The clearance space includes a clearance groove, which is located at the connection between the first end face of the punch and the second end face of the punch and extends downward toward the first end face of the punch. The clearance groove is an annular groove structure surrounding the connection between the first end face of the punch and the second end face of the punch. The width of the clearance groove is greater than or equal to 1 / 2 of the wall thickness of the workpiece, and the depth is greater than or equal to 1 / 4 of the wall thickness of the workpiece; The clearance space also includes a limit platform, which is located outside the connection between the first end surface of the punch and the second end surface of the punch, and is a convex structure surrounding the outside of the clearance groove; The clearance space also includes a small tapered surface with a slope, the small tapered surface is connected to the limiting platform, the clearance space includes a material blocking opening, the material blocking opening is connected to the small tapered surface, and the material blocking opening constitutes a limiting surface of the outer edge of the workpiece; The first end surface of the concave die and the second end surface of the concave die are connected by an oblique opening, and when the male die and the female die are engaged with each other, the oblique opening is located on the upper side of the clearance space; The bevel angle of the small tapered surface is greater than or equal to 8°.

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