Forging die for engine balance shaft

Abstract

The utility model discloses a forging die for a balance shaft of an engine, which comprises a lower die holder comprising a lower die block and a jacking block, the top surface of the lower die block is provided with a broken cavity, and the top surface of the jacking block is provided with a supporting through groove; an upper cavity is formed in the bottom surface of the upper die base; and the driving assembly is used for driving the upper mold base to move in the vertical direction, driving the lower mold base to move in the horizontal direction perpendicular to the length direction of the supporting through groove and driving the jacking block to move between the jacking position and the forming position so as to drive the upper mold base and the lower mold base to be switched among the mold closing state, the mold matching state and the mold splitting state. According to the forging die for the engine balance shaft, the relative positions of the upper die base and the lower die base are adjusted through the driving assembly, meanwhile, the positions of the lower die block and the jacking block in the lower die base can be adjusted, the contact area with a blank is increased through the supporting through grooves, and therefore the blank can be stably supported after forging is completed, collision of the blank is reduced, and the forging efficiency is improved. The later processing quality is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production technical field of engine balance shaft, especially to a kind of forging die of engine balance shaft. BACKGROUND

[0002] Engine balance shaft is an important component in automobile engine, which is equipped with eccentric weight on rotating shaft, and utilizes the reverse vibration force generated by eccentric weight when rotating shaft rotates, so that engine obtains good balance effect, thereby reducing engine vibration, therefore, engine balance shaft is of great significance to improve the balance of engine, reduce vibration and noise and improve driving comfort.

[0003] In prior art, the utility model discloses a kind of high-precision internal combustion engine balance shaft's forging die of Chinese utility model patent with announcement number CN212945210U, which reduces the contact area when forging, increases forging pressure, reduces forging pressure requirement, realizes energy saving, at the same time, first knockout hole and second knockout hole are arranged adjacent to the edge of pre-forging cavity and finish-forging cavity, after forging is completed, knockout pin passes through first knockout hole and second knockout hole, and acts on the flash of blank, so that blank is knocked out of pre-forging cavity and finish-forging cavity, which is convenient for mechanical hand to grab.

[0004] However, the above-mentioned end die only relies on knockout pin acting on the flash on the outer periphery of blank when knocking out blank, the contact area is small, and the knockout effect is limited, not only that, the distribution position of flash is random, when the flash material above first knockout hole and second knockout hole is less, the knockout area is further reduced, and since the contact area of knockout pin and flash is small, blank is difficult to balance knockout pre-forging cavity and finish-forging cavity, and in the process of knocking out, it is easy to knock with lower die holder, which causes the deformation of forged blank, and finally affects the product forming quality of balance shaft.

[0005] Therefore, it is necessary to improve the end die of engine balance shaft in prior art. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the defects in prior art, and provides a kind of forging die of engine balance shaft, which improves knockout effect and reduces the deformation of blank caused by knocking.

[0007] To achieve the above technical effects, the technical scheme of the utility model is as follows: a kind of forging die of engine balance shaft, comprising:

[0008] The lower die seat comprises a lower die block and a lifting block, the top surface of the lower die block is provided with a broken cavity, the lower die block is provided with a through hole extending along the height direction of the lower die block and communicating with the broken cavity, the top surface of the lifting block is provided with a horizontal support through slot, the lifting block is located on the inner side of the through hole and slides between a lifting position and a forming position in the vertical direction, the broken cavity and the support through slot combine to form a lower cavity of the lower die seat in the forming position, and the support through slot is located above the bottom wall of the broken cavity to hold up the blank in the lifting position;

[0009] The upper die seat is provided with an upper cavity on the bottom surface;

[0010] The driving assembly is used to drive the upper die seat to move in the vertical direction, drive the lower die seat to move in the horizontal direction perpendicular to the length direction of the support through slot, and drive the lifting block to move between the lifting position and the forming position, so as to drive the upper die seat and the lower die seat to switch between the closed die state, the matched die state and the open die state;

[0011] In the matched die state, the upper cavity is directly above the lower cavity, and the distance between the upper cavity and the lower cavity is greater than the depth of the upper cavity;

[0012] In the matched die state, the upper cavity is directly above the lower cavity, and the distance between the upper cavity and the lower cavity is greater than the depth of the upper cavity;

[0013] In the open die state, the lower die seat is located below the side of the upper die seat.

[0014] Preferably, in order to adjust the relative position of the upper die seat and the lower die seat, the driving assembly comprises:

[0015] The base is provided with a support strip on the top surface, the top surface of the support strip is matched with the bottom surface of the lifting block and comprises a first horizontal surface, a transition surface and a second horizontal surface which are sequentially and smoothly connected and the height increases, the first horizontal surface and the second horizontal surface are both horizontal and the length direction is perpendicular to the length direction of the support through slot;

[0016] The translation unit is connected with the lower die block on the output end to drive the lower die block to move in the horizontal direction perpendicular to the length direction of the support through slot while adjusting the height position of the lifting block;

[0017] The lifting unit is connected with the upper die seat on the output end to drive the upper die seat to move in the vertical direction.

[0018] Preferably, in order to ensure the smooth movement of the lifting block on the support strip, the bottom of the lifting block is provided with a rolling member which rolls on the top surface of the support strip.

[0019] Preferably, in order to ensure smooth movement of the lower module, the bottom surface of the lower module is provided with a sliding groove which is in sliding fit with the support strip.

[0020] Preferably, in order to precisely control the moving position of the lower module, the top surface of the base is further provided with positioning members at both ends of the support strip, and the lower module abuts against one of the positioning members in the closed die state and the other positioning member in the matched die state.

[0021] Preferably, in order to smoothly hold the blank, the support through groove is located in the middle of the lower cavity.

[0022] Preferably, in order to increase the width of the contact area with the blank, the inner wall of the support through groove is semicircular in cross section.

[0023] Preferably, in order to facilitate accurate placement of the blank in the support groove while aligning the parting cavity in the parting state, the height difference between the first horizontal plane and the second horizontal plane is less than the cavity depth of the parting cavity.

[0024] Preferably, in order to improve production efficiency, the upper die seat and the lower die seat are both provided with two.

[0025] Preferably, in order to improve production efficiency while improving forging precision, the two upper die seats are integrally connected and respectively serve as a pre-forging upper die and a finish-forging upper die, the two lower die seats are integrally connected and respectively serve as a pre-forging lower die and a finish-forging lower die, the pre-forging upper die corresponds to the pre-forging lower die, and the finish-forging lower die corresponds to the finish-forging upper die.

[0026] In summary, compared with the prior art, the forging die of the engine balance shaft of the utility model can adjust the relative position of the upper die seat and the lower die seat through the driving assembly, and can also adjust the position of the lower module and the jacking block in the lower die seat, and can increase the contact area with the blank through the support through groove, thereby facilitating smooth holding of the blank after forging, reducing the knocking of the blank, and ensuring the quality of subsequent processing. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structure schematic diagram of the utility model in the parting state;

[0028] Figure 2 is a structure schematic diagram of the utility model in the matched die state;

[0029] Figure 3 is a structure schematic diagram of the utility model in the closed die state;

[0030] Figure 4 is an explosion structure schematic diagram of Figure 2 ; and

[0031] Figure 5 is a sectional structure schematic view of Figure 2 ;

[0032] Figure 6 is a structure schematic view of the lower die seat of the utility model;

[0033] Figure 7 is an explosion schematic view of Figure 6 ;

[0034] In the figure: 1, lower die seat; 11, lower die block; 111, broken cavity; 112, through hole; 113, sliding groove; 12, jacking block; 121, supporting through slot; 13, rolling part; 2, upper die seat; 21, upper cavity; 3, base; 31, supporting strip; 311, first horizontal plane; 312, transition surface; 313, second horizontal plane; 32, positioning part; 4, translation unit; 5, lifting unit; 51, fixing frame; 52, hydraulic cylinder; 53, guide rod; 6, blank. DETAILED DESCRIPTION

[0035] The specific implementation of the utility model will be further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot be used to limit the protection scope of the utility model.

[0036] As shown in Figures 1-7 , the forging die of the engine balance shaft of the utility model comprises:

[0037] The lower die seat 1 comprises a lower die block 11 and a jacking block 12, the top surface of the lower die block 11 is provided with a broken cavity 111, the lower die block 11 is provided with a through hole 112 extending along the height direction thereof and communicating with the broken cavity 111, the top surface of the jacking block 12 is provided with a horizontal supporting through slot 121, the jacking block 12 is located on the inner side of the through hole 112 and slides between a jacking position and a forming position in the vertical direction, the broken cavity 111 and the supporting through slot 121 combine to form a lower cavity of the lower die seat 1 at the forming position, and at the jacking position, the supporting through slot 121 is located above the bottom wall of the broken cavity 111 to hold up the blank 6;

[0038] The upper die seat 2, the bottom surface of the upper die seat 2 is provided with an upper cavity 21;

[0039] The driving assembly is used to drive the upper die seat 2 to move in the vertical direction, drive the lower die seat 1 to move in the horizontal direction perpendicular to the length direction of the supporting through slot 121, and drive the jacking block 12 to move between the jacking position and the forming position, so as to drive the upper die seat 2 and the lower die seat 1 to switch between the die closing state, the die closing and opening state and the die opening state;

[0040] In the die closing and opening state, the upper cavity 21 and the lower cavity combine to form a forging cavity;

[0041] In the closed die state, the upper cavity 21 is directly above the lower cavity, and the distance between the two is greater than the depth of the upper cavity 21.

[0042] In the open die state, the lower die seat 1 is located below the side of the upper die seat 2.

[0043] When the forging die is in use, the driving assembly is used to adjust the upper die seat 2 and the lower die seat 1 to switch to the open die state, as shown in Figure 1 Specifically, the driving assembly drives the lower module 11 to move in a horizontal direction perpendicular to the support channel 121, and at the same time, the jacking block 12 moves upward to the jacking position, so that the support channel 121 on the top surface of the jacking block 12 is located above the top surface of the lower module 11. The blank 6 is placed on the support channel 121, so that the blank 6 is aligned with the broken cavity 111, and the support channel 121 is used to stably support the blank 6.

[0044] Then, the driving assembly switches the upper die seat 2 and the lower die seat 1 to the closed die state, as shown in Figure 2 Specifically, the driving assembly drives the lower module 11 to move in a horizontal direction perpendicular to the support channel 121, and at the same time, the jacking block 12 moves downward to the forming position, so that the support channel 121 on the top surface of the jacking block 12 and the broken cavity 111 on the top surface of the lower module 11 combine to form the lower cavity of the lower die seat 1, and the lower cavity is directly opposite the upper cavity 21 on the bottom surface of the upper die seat 2 above.

[0045] Then, the driving assembly switches the upper die seat 2 and the lower die seat 1 to the closed die state, as shown in Figure 3 In this state, the driving assembly drives the upper die seat 2 to move downward, so that the upper cavity 21 of the upper die seat 2 and the lower cavity of the lower die seat 1 combine to form a forging cavity. During the downward movement, the upper die seat 2 and the lower die seat 1 cooperate with each other, and the blank 6 is forged.

[0046] After the forging is completed, the driving assembly switches the upper die seat 2 and the lower die seat 1 to the open die state again, as shown in Figure 2 After the upper die seat 2 is located above the blank 6, the driving assembly switches the upper die seat 2 and the lower die seat 1 to the open die state again, as shown in Figure 1 At the same time, the jacking block 12 moves upward to the jacking position, so that the support channel 121 is lifted during the upward movement.

[0047] Compared with the prior art, in the utility model, the top of the through hole 112 is communicated with the broken cavity 111 of the top surface of the lower module 11, the inside of the through hole 112 slides along the horizontal direction of the vertical direction of the sliding groove 113, the inner wall of the sliding groove 113 increases the contact area of the blank 6, so that the blank 6 is conveniently lifted stably, is separated from the cavity wall of the broken cavity 111, the mechanical hand is conveniently grabbed, and the opportunity of the blank 6 colliding with the lower die base 1 is reduced, so that the machining precision of subsequent blank 6 and the forming quality of the final engine balance shaft product are guaranteed.

[0048] Further improvement is that the driving assembly comprises:

[0049] The top surface of the base 3 is provided with a support strip 31, the top surface of the support strip 31 is attached to the bottom surface of the jacking block 12 and comprises a first horizontal surface 311, a transition surface 312 and a second horizontal surface 313 which are sequentially and smoothly connected and the height increases, the first horizontal surface 311 and the second horizontal surface 313 are both horizontal and the length direction is perpendicular to the length direction of the support through groove 121;

[0050] The output end of the translation unit 4 is connected with the lower module 11 to drive the lower module 11 to move along the horizontal direction perpendicular to the length direction of the support through groove 121 while adjusting the height position of the jacking block 12;

[0051] The output end of the lifting unit 5 is connected with the upper die base 2 to drive the upper die base 2 to move along the vertical direction.

[0052] The base 3 is a horizontal rectangular plate, the bottom surface of the lower module 11 is attached to the top surface of the base 3, the lifting unit 5 comprises a fixed frame 51 in inverted U shape, both ends of the fixed frame 51 are fixed above the base 3, a downward hydraulic cylinder 52 is arranged on the fixed frame 51, the cylinder barrel of the hydraulic cylinder 52 is downward, the piston rod penetrates through the top of the fixed frame 51 and is fixedly connected with the top surface of the upper die base 2 at the bottom end, the top surface of the upper die base 2 is also fixedly connected with a guide rod 53 which extends along the vertical direction and is in sliding fit with the fixed frame 51, in this way, after the hydraulic cylinder 52 is started, through the sliding fit of the guide rod 53 and the fixed frame 51, the stable movement of the upper die base 2 along the vertical direction is ensured.

[0053] The projection length direction of the support strip 31 on the horizontal plane is perpendicular to the length direction of the support through groove 121, the top surface of the support strip 31 comprises three parts, wherein the transition surface 312 is an inclined surface, so that the first horizontal surface 311, the transition surface 312 and the second horizontal surface 313 are sequentially and smoothly connected while the height increases, furthermore, the bottom of the jacking block 12 is also provided with a rolling part 13, the rolling part 13 is a roller, and the roller rolls on the top surface of the support strip 31.

[0054] With the above structure, the lower module 11 is driven by the translation unit 4 to move in the horizontal direction perpendicular to the length direction of the support channel 121. During the movement, the rolling member 13 is in contact with the top surface of the support strip 31, so that the contact position of the rolling member 13 with the support strip 31 is different at different horizontal positions. When the rolling member 13 is located at the first horizontal plane 311, the jacking block 12 is in the forming position. When the rolling member 13 is located at the second horizontal plane 313, the jacking block 12 is in the jacking position, and the blank 6 can be jacked up. The rolling member 13 can reduce the friction with the support strip 31.

[0055] Further improvement is that the bottom surface of the lower module 11 is provided with a sliding groove 113 which is in sliding fit with the support strip 31. Specifically, the groove width of the sliding groove 113 is consistent with the width of the support strip 31, so that the two inner side walls of the sliding groove 113 opposite to each other are connected with the support strip 31 to ensure that the lower module 11 moves stably when the translation unit 4 operates.

[0056] Further improvement is that the top surface of the base 3 is further provided with a positioning member 32 located at both ends of the support strip 31. In the closed die state and the die alignment state, the lower module 11 is in abutment with one of the positioning members 32. In the die alignment state, the lower module 11 is in abutment with the other positioning member 32. By providing two positioning members 32, the sliding range of the lower module 11 can be limited, so that when the lower module 11 is in abutment with one of the positioning members 32, the lower die seat 1 and the upper die seat 2 are in one of the closed die state, the die alignment state and the die opening state. The translation unit 4 is a translation cylinder, the cylinder barrel of which is fixed to one of the positioning members 32, and the piston rod is fixedly connected with the lower module 11.

[0057] Further improvement is that the support channel 121 is located in the middle of the lower cavity. With the above design, the center of gravity of the blank 6 can be located above the support channel 121, which is further conducive to stably supporting the blank 6.

[0058] Further improvement is that the inner wall of the support channel 121 is semicircular in cross section. In this way, the width dimension of the support channel 121 is increased, and the contact area between the support channel 121 and the blank 6 is increased, so as to stably support the blank 6.

[0059] Further improvement is that the height difference between the first horizontal plane 311 and the second horizontal plane 313 is less than the cavity depth of the broken cavity 111. In this way, when the blank 6 is placed on the support channel 121 in the die opening state, the blank 6 can partially enter the broken cavity 111 to realize precise butt joint between the blank 6 and the broken cavity 111.

[0060] Further improvement is that the upper die seat 2 and the lower die seat 1 are both provided with two; two upper die seats 2 are integrally connected and are respectively a pre-forging upper die and a finish-forging upper die, two lower die seats 1 are integrally connected and are respectively a pre-forging lower die and a finish-forging lower die, the pre-forging upper die corresponds to the pre-forging lower die, and the finish-forging lower die corresponds to the finish-forging upper die.

[0061] After the above structure is adopted, the device can be used to simultaneously pre-forging and finish-forging two blank 6 respectively, improve the production efficiency, further improve the forging precision, and improve the forming quality of the final automobile engine balance shaft product.

[0062] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A forging die for an engine counter shaft, characterized by, The utility model relates to a die set for a die-casting machine, comprising: a lower die seat (1) comprising a lower die block (11) and a jacking block (12), the top surface of the lower die block (11) is provided with a broken cavity (111), the lower die block (11) is provided with a through hole (112) extending along the height direction thereof and communicating with the broken cavity (111), the top surface of the jacking block (12) is provided with a horizontal support through groove (121), the jacking block (12) is located on the inner side of the through hole (112) and slides between a jacking position and a forming position in the vertical direction, the broken cavity (111) and the support through groove (121) combine to form a lower cavity of the lower die seat (1) in the forming position, and the support through groove (121) is located above the bottom wall of the broken cavity (111) to hold up a blank (6) in the jacking position; an upper die seat (2), the bottom surface of the upper die seat (2) is provided with an upper cavity (21); a driving assembly for driving the upper die seat (2) to move in the vertical direction, driving the lower die seat (1) to move in the horizontal direction perpendicular to the length direction of the support through groove (121), and driving the jacking block (12) to move between the jacking position and the forming position, so as to drive the upper die seat (2) and the lower die seat (1) to switch between a closed die state, a matched die state and a split die state; in the matched die state, the upper cavity (21) is directly above the lower cavity; in the split die state, the lower die seat (1) is located below the side of the upper die seat (2). The driving assembly comprises:

2. The forging die for an engine counter shaft according to claim 1, characterized by: a base (3), the top surface of the base (3) is provided with a support strip (31), the top surface of the support strip (31) is attached to the bottom surface of the jacking block (12) and comprises a first horizontal surface (311), a transition surface (312) and a second horizontal surface (313) which are sequentially and smoothly connected and have increasing heights, the first horizontal surface (311) and the second horizontal surface (313) are both horizontal and have lengths perpendicular to the length direction of the support through groove (121); a translation unit (4), the output end of the translation unit (4) is connected to the lower die block (11) to drive the lower die block (11) to move in the horizontal direction perpendicular to the length direction of the support through groove (121) while adjusting the height position of the jacking block (12); a lifting unit (5), the output end of the lifting unit (5) is connected to the upper die seat (2) to drive the upper die seat (2) to move in the vertical direction. The bottom of the jacking block (12) is provided with a rolling part (13) rolling on the top surface of the support strip (31).

3. The forging die for an engine counter shaft according to claim 2, characterized by: The bottom surface of the lower die block (11) is provided with a sliding groove (113) slidingly matched with the support strip (31).

4. The forging die for an engine counter shaft according to claim 2, characterized by: ​ 5. The forging die for an engine counter shaft as set forth in claim 2, characterized by: The top surface of the base (3) is further provided with positioning members (32) at both ends of the support strips (31), the lower mold block (11) abuts against one of the positioning members (32) in the closed mold state and the matched mold state, and the lower mold block (11) abuts against the other positioning member (32) in the matched mold state.

6. The forged die for an engine counter shaft as set forth in claim 1, characterized by: The support through slot (121) is located in the middle of the lower cavity.

7. The forged die for an engine counter shaft as set forth in claim 1, characterized by: The inner wall of the support through slot (121) is semicircular in cross section.

8. The forging die for an engine counter shaft as set forth in claim 2, characterized by: The height difference between the first horizontal plane (311) and the second horizontal plane (313) is less than the cavity depth of the broken cavity (111).

9. The forged die for an engine counter shaft as set forth in claim 1, characterized by: Both the upper die seat (2) and the lower die seat (1) are provided with two.

10. The forging die for an engine counter shaft as set forth in claim 9, characterized by: The two upper die seats (2) are integrally connected and respectively serve as a pre-forging upper die and a finish-forging upper die, the two lower die seats (1) are integrally connected and respectively serve as a pre-forging lower die and a finish-forging lower die, the pre-forging upper die corresponds to the pre-forging lower die, and the finish-forging lower die corresponds to the finish-forging upper die.

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