Multidirectional forging die and forging device for step pin bush

Abstract

The utility model relates to a multidirectional forging die and a forging device for a step pin bush, and belongs to the technical field of step pin bush production. Comprising a lower die and an upper die located above the lower die, an upper half die cavity is formed in the middle of the lower surface of the upper die, a left upper half hole and a right upper half hole which are communicated with the upper half die cavity are formed in the two sides of the upper half die cavity, and a lower half die cavity is formed in the middle of the upper surface of the lower die; a left upper half hole and a left lower half hole which are communicated with the lower half die cavity are formed in the two sides of the lower half die cavity, and a second punching hole allowing a right punching punch to be inserted therein is formed between the upper die and the lower die. The utility model has the beneficial effects that the left side punching punch and the right side punching punch are simultaneously inserted into the die cavity, so that a workpiece is extruded in an all-dimensional closed manner, the integral structure of the step pin bush is forged and formed, and the external defects of a forge piece caused by overlarge vertical one-time punching pressure are avoided; meanwhile, the inner hole of the part is formed at a time, and the two end faces of the part are punched to specified sizes.

Description

Technical Field

[0001] The utility model relates to a multi-directional forging die and a forging device for a step pin sleeve, belonging to the technical field of step pin sleeve production. Background Art

[0002] like Figure 5 The step pin sleeve shown has a hollow inner hole and a stepped outer wall. It is a component used in conjunction with a pin shaft and is widely used in construction machinery (excavators, bulldozers), automobiles, trains, ships and other places with movable arms.

[0003] The patent application with patent number 201811374199.9 discloses a stamping device used for pin sleeve forging. It includes a base, a pressure plate is fixedly arranged on the left side of the upper end face of the base, a mounting plate is arranged on the right bottom of the pressure plate, a mounting seat is arranged above the mounting plate, and a stamping device is arranged on the upper end face of the right side of the mounting plate. The stamping is performed by a hydraulic cylinder, and the stamping die rod is used as the stamping die. It is easy to operate and has a simple structure. The columnar material is placed in the pin shaft hole for easy access. The pressure is shared by the pressure plate and the mounting plate. The structure is stable and reliable, and the stamping efficiency is high.

[0004] The current technical considerations are not comprehensive and have the following disadvantages: the existing processing technology of the step pin sleeve adopts the common vertical forging, and excessive vertical single stamping pressure will cause external defects in the forging.

[0005] In order to solve one of the above problems, a multi-directional forging die and forging device for a step pin sleeve are urgently needed. Utility Model Content

[0006] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is: how to simultaneously insert the left-side punching punch and the right-side punching punch into the die cavity so that the workpiece is subjected to all-round closed extrusion and the overall structural forging of the step pin sleeve is completed. For this purpose, a multi-directional forging die and forging device of a step pin sleeve are provided.

[0007] The multi-directional forging die for a step pin sleeve described in the utility model is characterized in that it includes a lower die and an upper die located above the lower die, an upper die cavity is arranged in the middle of the lower surface of the upper die, a left upper half hole and a right upper half hole connected to the upper die cavity are arranged on both sides of the upper die cavity, a lower die cavity is arranged in the middle of the upper surface of the lower die, a left upper half hole and a left lower half hole connected to the lower die cavity are arranged on both sides of the lower die cavity, the upper die cavity and the lower die cavity are spliced ​​to form a die cavity for forging the step pin sleeve between the upper die and the lower die, the left upper half hole and the left upper half hole are spliced ​​to form a first punching hole for inserting a left punching punch between the upper die and the lower die, and the right upper half hole and the left lower half hole are spliced ​​to form a second punching hole for inserting a right punching punch between the upper die and the lower die.

[0008] The upper die is installed on the main press, the connecting plate A and the connecting plate B are installed on the left and right presses respectively, and the lower die is installed on the workbench. The main press is used for the upper die closing and opening, and the forged blank is placed in the lower die cavity. The main press controls the closing of the upper and lower dies, and the left and right presses of the multi-directional die forging hydraulic equipment squeeze inward at the same time. The left and right punching punches are inserted into the die cavity at the same time, so that the workpiece is subjected to all-round closed extrusion to complete the overall structural forging of the step pin sleeve. Avoid excessive vertical one-time stamping pressure to cause external defects in the forging, and at the same time ensure that the inner hole of the part is formed and the two end faces of the part are stamped to the specified size at one time.

[0009] Preferably, the cross-sections of the left upper half hole and the left upper half hole are semicircular, the cross-sections of the right upper half hole and the left lower half hole are semicircular, and the first punching hole and the second punching hole are coaxially arranged with the mold cavity.

[0010] Preferably, the mold cavity consists of a three-section structure of a front section hole, a middle section hole and a rear section hole. The front section hole, the middle section hole and the rear section hole are all coaxially arranged straight holes. The diameter of the front section hole is smaller than that of the middle section hole, and the diameter of the front section hole is equal to that of the rear section hole.

[0011] Preferably, the first punching hole is connected to the front section hole, and the second punching hole is connected to the rear section hole.

[0012] Preferably, the four corners of the lower surface of the upper mold are respectively provided with a positioning corner block, and the four corners of the upper surface of the lower mold are respectively provided with a positioning groove, and the four groups of the positioning corner blocks and the four groups of the positioning grooves correspond one to one.

[0013] Preferably, the left punching punch is horizontally arranged and also includes a connecting column A coaxial with the left punching punch. The left punching punch and the connecting column A are integrally formed. A tail plate A is provided at the tail end of the connecting column A, and the tail plate A is detachably mounted on the connecting plate A by bolt A.

[0014] Preferably, the right punching punch is horizontally arranged and also includes a connecting column B coaxial with the right punching punch. The right punching punch and the connecting column B are integrally formed. A tail plate B is provided at the tail end of the connecting column B, and the tail plate B is detachably mounted on the connecting plate B by bolts B.

[0015] The utility model also discloses a forging device for a step pin sleeve, comprising a multi-directional die forging hydraulic device, wherein the multi-directional die forging hydraulic device comprises a workbench, a main position press located above the workbench, and a left position press and a right position press located on both sides of the workbench, and also comprises the multi-directional forging die of the step pin sleeve mentioned above, wherein the upper die of the multi-directional forging die of the step pin sleeve is installed on the main position press, the connecting plate A and the connecting plate B are installed on the left position press and the right position press respectively, and the lower die is installed on the workbench, the main position press is used for closing and opening the upper die, the blank to be forged is placed in the lower half die cavity, the main position press controls the closing of the upper die and the lower die, the left position press and the right position press of the multi-directional die forging hydraulic device are squeezed inward at the same time, the left punching punch and the right punching punch are inserted into the die cavity, so that the workpiece is subjected to all-round closed extrusion, and the overall structural forging of the step pin sleeve is completed.

[0016] The main press of the multi-directional die forging hydraulic equipment is still in the pressure-maintaining state, and the left-side press and the right-side press are reset at the same time; the main press of the multi-directional die forging hydraulic equipment is reset to complete the multi-directional forging.

[0017] Preferably, the left-side positioning press and the right-side positioning press respectively adopt a left-thrust hydraulic cylinder and a right-thrust hydraulic cylinder as power, and also include a hydraulic control system for driving the left-thrust hydraulic cylinder and the right-thrust hydraulic cylinder to synchronously extend and retract, the hydraulic control system includes an oil tank, a hydraulic pump and a three-position four-way reversing valve, the P port of the three-position four-way reversing valve is connected to the oil outlet of the hydraulic pump, the A port of the three-position four-way reversing valve is connected to the rodless chamber of the left-thrust hydraulic cylinder through an oil pipe, the T port of the three-position four-way reversing valve and the oil inlet of the hydraulic pump are both connected to the oil tank, the rod chamber of the left-thrust hydraulic cylinder is connected to the rodless chamber of the right-thrust hydraulic cylinder through a straight oil pipe, the B port of the three-position four-way reversing valve is connected to the rod chamber of the right-thrust hydraulic cylinder through a pipeline, and the left-thrust hydraulic cylinder and the right-thrust hydraulic cylinder are of the same model.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The multi-directional forging die of the step pin sleeve described in the utility model has a left-side punching punch and a right-side punching punch inserted into the die cavity at the same time, so that the workpiece is subjected to all-round closed extrusion, and the overall structural forging of the step pin sleeve is completed, avoiding external defects of the forging caused by excessive vertical single punching pressure, and at the same time ensuring that the inner hole of the part is formed and the two end faces of the part are punched to the specified size at one time.

[0020] The multi-directional forging die of the step pin sleeve described in the utility model, the left-side press and the right-side press respectively use a left-push hydraulic cylinder and a right-push hydraulic cylinder as power, and the left-push hydraulic cylinder and the right-push hydraulic cylinder are driven to extend and retract synchronously through a hydraulic control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the lower mold;

[0024] Figure 3 It is a structural schematic diagram of the upper die;

[0025] Figure 4 It is the hydraulic control principle diagram of the multi-directional die forging hydraulic equipment;

[0026] Figure 5 This is the finished product picture of the step pin sleeve.

[0027] In the figure: 1, upper die 1.2, left upper half hole 1.3, right upper half hole 2, lower die 2.1, lower half die cavity 2.2, left upper half hole 2.3, left lower half hole 3, left punch 4, right punch 5, positioning angle block 6, positioning groove 7, connecting column A 8, tail plate A 9, connecting plate A 10, step pin sleeve 11, left push hydraulic cylinder 12, right push hydraulic cylinder 13, oil tank 14, hydraulic pump 15, three-position four-way reversing valve 2.1.1, front section hole 2.1.2, middle section hole 2.1.3, rear section hole. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings:

[0029] The present invention is further described below through specific embodiments, but is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0030] Embodiment 1, as Figure 1-3As shown, the multi-directional forging die of the step pin sleeve comprises a lower die 2 and an upper die 1 located above the lower die 2, an upper die cavity 1.1 is arranged in the middle of the lower surface of the upper die 1, and a left upper half hole 2.2 and a right upper half hole 1.3 connected to the upper die cavity 1.1 are arranged on both sides of the upper die cavity 1.1, and a lower die cavity 2.1 is arranged in the middle of the upper surface of the lower die 2, and a left upper half hole 2.2 and a right upper half hole 1.3 connected to the lower die cavity 2.1 are arranged on both sides of the lower die cavity 2.1. 2 and the left lower half hole 2.3, the upper half cavity 1.1 and the lower half cavity 2.1 are spliced ​​between the upper die 1 and the lower die 2 to form a cavity for forging a step pin sleeve, the left upper half hole 2.2 and the left upper half hole 2.2 are spliced ​​between the upper die 1 and the lower die 2 to form a first punching hole for the left punch 3 to be inserted, the right upper half hole 1.3 and the left lower half hole 2.3 are spliced ​​between the upper die 1 and the lower die 2 to form a second punching hole for the right punch 4 to be inserted.

[0031] The upper die 1 is installed on the main press, the connecting plate A9 and the connecting plate B are installed on the left and right presses respectively, and the lower die 2 is installed on the workbench. The main press is used for the closing and opening of the upper die 1. The blank to be forged is placed in the lower die cavity 2.1. The main press controls the closing of the upper die 1 and the lower die 2. The left and right presses of the multi-directional die forging hydraulic equipment squeeze inward at the same time, and the left punch 3 and the right punch 4 are inserted into the die cavity, so that the workpiece is subjected to all-round closed extrusion, and the overall structural forging of the step pin sleeve 10 is completed. Avoid excessive vertical one-time stamping pressure to cause external defects in the forging, and at the same time ensure that the inner hole of the part is formed and the two end faces of the part are stamped to the specified size at one time.

[0032] Embodiment 2, as Figure 1-3 As shown, the multi-directional forging die of the step pin sleeve comprises a lower die 2 and an upper die 1 located above the lower die 2, an upper die cavity 1.1 is arranged in the middle of the lower surface of the upper die 1, and a left upper half hole 2.2 and a right upper half hole 1.3 connected to the upper die cavity 1.1 are arranged on both sides of the upper die cavity 1.1, and a lower die cavity 2.1 is arranged in the middle of the upper surface of the lower die 2, and a left upper half hole 2.2 and a right upper half hole 1.3 connected to the lower die cavity 2.1 are arranged on both sides of the lower die cavity 2.1. 2 and the left lower half hole 2.3, the upper half cavity 1.1 and the lower half cavity 2.1 are spliced ​​between the upper die 1 and the lower die 2 to form a cavity for forging a step pin sleeve, the left upper half hole 2.2 and the left upper half hole 2.2 are spliced ​​between the upper die 1 and the lower die 2 to form a first punching hole for the left punch 3 to be inserted, the right upper half hole 1.3 and the left lower half hole 2.3 are spliced ​​between the upper die 1 and the lower die 2 to form a second punching hole for the right punch 4 to be inserted.

[0033] Furthermore, the cross-sections of the left upper half hole 2.2 and the left upper half hole 2.2 are semicircular, the cross-sections of the right upper half hole 1.3 and the left lower half hole 2.3 are semicircular, and the first punching hole and the second punching hole are coaxially arranged with the mold cavity.

[0034] Furthermore, the mold cavity consists of a three-section structure of a front hole 2.1.1, a middle hole 2.1.2 and a rear hole 2.1.3. The front hole 2.1.1, the middle hole 2.1.2 and the rear hole 2.1.3 are all coaxially arranged straight holes. The diameter of the front hole is smaller than that of the middle hole, and the diameter of the front hole is equal to that of the rear hole.

[0035] Furthermore, the first punching hole is connected to the front section hole, and the second punching hole is connected to the rear section hole.

[0036] Furthermore, four corners of the lower surface of the upper mold 1 are respectively provided with a positioning corner block 5, and four corners of the upper surface of the lower mold 2 are respectively provided with a positioning groove 6, and the four groups of the positioning corner blocks 5 and the four groups of the positioning grooves 6 correspond one to one.

[0037] Furthermore, the left punching punch 3 is horizontally arranged and also includes a connecting column A7 coaxial with the left punching punch 3. The left punching punch 3 and the connecting column A7 are integrally formed. A tail plate A8 is provided at the tail end of the connecting column A7, and the tail plate A8 is detachably mounted on the connecting plate A9 by bolts A.

[0038] Furthermore, the right punching punch 4 is horizontally arranged and also includes a connecting column B coaxial with the right punching punch 4. The right punching punch 4 and the connecting column B are integrally formed. A tail plate B is provided at the tail end of the connecting column B, and the tail plate B is detachably mounted on the connecting plate B by bolts B.

[0039] Embodiment 3, the forging device of the step pin sleeve comprises a multi-directional die forging hydraulic equipment, the multi-directional die forging hydraulic equipment comprises a workbench, a main position press located above the workbench, and a left position press and a right position press located on both sides of the workbench, and also comprises the above-mentioned multi-directional forging die of the step pin sleeve, the upper die 1 of the multi-directional forging die of the step pin sleeve is installed on the main position press, the connecting plate A9 and the connecting plate B are installed on the left position press and the right position press respectively, the lower die 2 is installed on the workbench, the main position press is used for the closing and opening of the upper die 1, the blank to be forged is placed in the lower half die cavity 2.1, the main position press controls the closing of the upper die 1 and the lower die 2, the left position press and the right position press of the multi-directional die forging hydraulic equipment squeeze inward at the same time, the left punching punch 3 and the right punching punch 4 are inserted into the die cavity, so that the workpiece is subjected to all-round closed extrusion, and the overall structural forging of the step pin sleeve is completed.

[0040] The main press of the multi-directional die forging hydraulic equipment is still in the pressure-maintaining state, and the left-side press and the right-side press are reset at the same time; the main press of the multi-directional die forging hydraulic equipment is reset to complete the multi-directional forging.

[0041] Further, refer to Figure 4 The left-side press and the right-side press respectively use a left-thrust hydraulic cylinder 11 and a right-thrust hydraulic cylinder 12 as power, and also include a hydraulic control system for driving the left-thrust hydraulic cylinder 11 and the right-thrust hydraulic cylinder 12 to synchronously extend and retract. The hydraulic control system includes an oil tank 13, a hydraulic pump 14 and a three-position four-way reversing valve 15. The P port of the three-position four-way reversing valve 15 is connected to the oil outlet of the hydraulic pump 14, the A port of the three-position four-way reversing valve 15 is connected to the rodless cavity of the left-thrust hydraulic cylinder 11 through an oil pipe, the T port of the three-position four-way reversing valve 15 and the oil inlet of the hydraulic pump 14 are both connected to the oil tank 13, the rod cavity of the left-thrust hydraulic cylinder 11 is connected to the rodless cavity of the right-thrust hydraulic cylinder 12 through a straight oil pipe, the B port of the three-position four-way reversing valve 15 is connected to the rod cavity of the right-thrust hydraulic cylinder 12 through a pipeline, and the left-thrust hydraulic cylinder 11 and the right-thrust hydraulic cylinder 12 are of the same model.

[0042] Hydraulic oil is filled in the rod chamber of the left-thrust hydraulic cylinder 11 and the rodless chamber of the right-thrust hydraulic cylinder 12. When working, the three-position four-way reversing valve 15 is switched to the left position, and the oil enters the rodless chamber of the left-thrust hydraulic cylinder 11 through the hydraulic pump 14 and the three-position four-way reversing valve 15, pushing the piston and piston rod of the left-thrust hydraulic cylinder 11 to move to the right, and the oil in the rod chamber of the left-thrust hydraulic cylinder 11 is squeezed into the rodless chamber of the right-thrust hydraulic cylinder 12. The oil in the rodless chamber of the right-thrust hydraulic cylinder 12 pushes the piston and piston rod of the right-thrust hydraulic cylinder 12 to move to the left, and the left-side press and the right-side press of the multi-directional die forging hydraulic equipment are squeezed inward at the same time, and the left-side punch 3 and the right-side punch 4 are inserted into the die cavity;

[0043] On the contrary, the three-position four-way reversing valve 15 is switched to the right position, and the oil enters the rod chamber of the right push hydraulic cylinder 12 through the hydraulic pump 14 and the three-position four-way reversing valve 15, pushing the piston and piston rod of the right push hydraulic cylinder 12 to move to the right, and the oil in the right push hydraulic cylinder 12 is squeezed into the rod chamber of the left push hydraulic cylinder 11, and the oil in the rod chamber of the left push hydraulic cylinder 11 pushes the piston and piston rod of the left push hydraulic cylinder 11 to move to the left, and the left push hydraulic cylinder 11 and the right push hydraulic cylinder 12 respectively drive the left position press and the right position press to reset at the same time, and restore the initial state;

[0044] The three-position four-way reversing valve 15 is switched to the middle position, and the left push hydraulic cylinder 11 and the right push hydraulic cylinder 12 are in a pressure maintaining state.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the present utility model is defined by the attached claims and their equivalents.

[0046] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A multi-directional forging die for a stepped pin sleeve, characterized in that: The invention comprises a lower mold (2) and an upper mold (1) located above the lower mold (2); an upper mold cavity (1.1) is arranged in the middle of the lower surface of the upper mold (1); a left upper half hole (2.2) and a right upper half hole (1.3) connected to the upper mold cavity (1.1) are arranged on both sides of the upper mold cavity (1.1); a lower mold cavity (2.1) is arranged in the middle of the upper surface of the lower mold (2); a left upper half hole (2.2) and a left lower half hole (2.3) connected to the lower mold cavity (2.1) are arranged on both sides of the lower mold cavity (2.1); .3), the upper half mold cavity (1.1) and the lower half mold cavity (2.1) are assembled between the upper mold (1) and the lower mold (2) to form a mold cavity for forging a step pin sleeve, the left upper half hole (2.2) and the left upper half hole (2.2) are assembled between the upper mold (1) and the lower mold (2) to form a first punch hole for inserting a left punch (3), and the right upper half hole (1.3) and the left lower half hole (2.3) are assembled between the upper mold (1) and the lower mold (2) to form a second punch hole for inserting a right punch (4).

2. The multi-directional forging die of the stepped pin sleeve according to claim 1 is characterized in that: The cross-sections of the left upper half hole (2.2) and the left upper half hole (2.2) are semicircular, the cross-sections of the right upper half hole (1.3) and the left lower half hole (2.3) are semicircular, and the first punching hole and the second punching hole are coaxially arranged with the mold cavity.

3. The multi-directional forging die of the stepped pin sleeve according to claim 2 is characterized in that: The mold cavity is composed of a three-section structure of a front section hole (2.1.1), a middle section hole (2.1.2) and a rear section hole (2.1.3). The front section hole (2.1.1), the middle section hole (2.1.2) and the rear section hole (2.1.3) are all coaxially arranged straight holes. The aperture of the front section hole is smaller than that of the middle section hole, and the aperture of the front section hole is equal to that of the rear section hole.

4. The multi-directional forging die of the stepped pin sleeve according to claim 3 is characterized in that: The first punching hole is connected to the front section hole, and the second punching hole is connected to the rear section hole.

5. The multi-directional forging die of the stepped pin sleeve according to claim 1 is characterized in that: Four corners of the lower surface of the upper die (1) are respectively provided with a positioning corner block (5), and four corners of the upper surface of the lower die (2) are respectively provided with a positioning groove (6), and the four groups of positioning corner blocks (5) and the four groups of positioning grooves (6) correspond one to one.

6. The multi-directional forging die of the stepped pin sleeve according to claim 5, characterized in that: The left-side punching punch (3) is arranged horizontally, and further comprises a connecting column A (7) coaxial with the left-side punching punch (3), wherein the left-side punching punch (3) and the connecting column A (7) are integrally formed, and a tail plate A (8) is arranged at the rear end of the connecting column A (7), and the tail plate A (8) is detachably mounted on the connecting plate A (9) by means of bolts A.

7. The multi-directional forging die of the stepped pin sleeve according to claim 6, characterized in that: The right punching punch (4) is arranged horizontally, and also includes a connecting column B coaxial with the right punching punch (4), the right punching punch (4) and the connecting column B are integrally formed, and a tail plate B is arranged at the rear end of the connecting column B, and the tail plate B is detachably mounted on the connecting plate B by bolts B.

8. A forging device for a stepped pin sleeve, comprising a multi-directional die forging hydraulic device, wherein the multi-directional die forging hydraulic device comprises a workbench, a main press located above the workbench, and a left press and a right press located on both sides of the workbench, characterized in that: It also includes a multi-directional forging die for a step pin sleeve as described in claim 7, wherein the upper die (1) of the multi-directional forging die for the step pin sleeve is installed on a main press, the connecting plate A (9) and the connecting plate B are installed on a left press and a right press respectively, the lower die (2) is installed on a workbench, and the main press is used for closing and opening the upper die (1).

Images