A hot-dip bar upsetting die for a gear shift fork

Abstract

The utility model discloses a kind of bar upsetting die of automobile gear shifting fork hot plating, the bar upsetting die includes upper die, lower die and side die, the mating surface of upper die and lower die is provided with the pit of bar upsetting, pit and the side surface of upper die and lower die are through as open end, the other side of pit is blind end;Four corners of lower die are provided with four limit holes, four corners of upper die are provided with limit pin matched with limit hole, when upper die and lower die close, limit pin and limit hole cooperate and leave the gap of overflow between upper die and lower die;Side die is fixed in the side of pit open end, when side die and upper die and lower die close, the gap between side die and upper die and lower die is the blank thickness of gear shifting fork open end.The beneficial effects of the utility model are: realize the shaft end upsetting of gear shifting fork and the upsetting of fork end in same die complete, complete the upsetting of two parts by once positioning, provide more accurate batching for subsequent process, can save material, save process.

Description

Technical Field

[0001] This utility model belongs to the technical field of forging blanks for automotive shift forks, and particularly relates to a bar upsetting die for hot-dip galvanizing automotive shift forks. Background Technology

[0002] The existing forging of automotive shift fork blanks requires two processes: upsetting the shaft end and upsetting the fork end. Since the two upsetting processes require two positioning, there is a difference in the center of the finished material. In order to eliminate the impact of this difference on subsequent processing, the size of the material can only be increased, resulting in waste of forging materials and too many processes. Summary of the Invention

[0003] The purpose of this utility model embodiment is to provide a bar upsetting mold for hot-dip galvanizing automotive shift forks, aiming to solve the technical problem that the existing automotive shift fork blank forging requires two processes, and the upsetting of the shaft end and the fork end of the automotive shift fork results in too many processes.

[0004] The present invention is implemented as follows:

[0005] A bar stock upsetting die for hot-dip galvanizing an automotive shift fork, comprising an upper die, a lower die, and side dies. The mating surfaces of the upper and lower dies are provided with upsetting recesses for the bar stock, the recesses being open ends that connect to the sides of the upper and lower dies, and the other side of the recess being a blind end. The lower die has four limiting holes at its four corners, and the upper die has limiting pins at its four corners that mate with the limiting holes. When the upper and lower dies are closed, the limiting pins and limiting holes create a gap between the upper and lower dies for material overflow. The side dies are fixed to the side of the opening end of the recesses. When the side dies are closed with the upper and lower dies, the gap between the side dies and the upper and lower dies is equal to the blank thickness at the opening end of the shift fork.

[0006] Furthermore, the side mold has a groove at its center, and when the upsetting mold is closed, the axis of the groove is coaxial with the axis of the pit.

[0007] Furthermore, the recess is divided into an upper recess and a lower recess, with the upper recess located on the bottom surface of the upper mold and the lower recess located on the top surface of the lower mold; when the upsetting mold is closed, the upper recess and the lower recess form the recess.

[0008] Furthermore, the upper and lower dies are provided with load-bearing blocks on the side away from the side dies to withstand the impact force of the side dies when the side dies are upsetting.

[0009] Furthermore, a limiting ejector rod is provided on the side along the movement direction of the side mold. When the ejector rod contacts the side of the upper or lower mold, the side upsetting of the bar stock is completed.

[0010] Furthermore, a contact switch is connected to the end of the ejector rod away from the upper or lower mold, and the termination action of the side mold is controlled by the contact switch.

[0011] Furthermore, there are two ejector rods, symmetrically arranged on both sides of the side mold. The ejector rods are provided with threaded sections, which can be used to adjust the upsetting termination position of the side mold.

[0012] The positive effects of this utility model are as follows: by setting up the upsetting pits of the bar stock on the mating surfaces of the upper and lower dies, the shaft end of the shift fork is upset; by using the gap between the side die and the upper and lower dies when they are closed, the blank thickness of the open end of the shift fork is achieved, thus achieving upsetting of the shift fork end. The shaft end upsetting and the shift fork end upsetting are completed in the same mold, and the upsetting of the two parts is completed in one positioning, providing more accurate material preparation for subsequent processes, saving materials and processes. Attached Figure Description

[0013] Figure 1 This is a front view of a hot-dip galvanized bar stock upsetting die for an automotive gear shift fork, according to this utility model.

[0014] Figure 2 yes Figure 1 The diagram shown is a three-dimensional structural schematic diagram of a hot-dip galvanized bar stock upsetting die for an automotive shift fork according to the present invention, taken from a first-view perspective.

[0015] Figure 3 yes Figure 1 The diagram shown is a three-dimensional structural schematic from a second perspective of the upsetting die for a hot-dip galvanized automotive shift fork according to this utility model.

[0016] Figure 4 yes Figure 1 The diagram shown is a three-dimensional structural schematic diagram of a hot-dip galvanized bar stock upsetting die for an automotive shift fork according to this utility model, viewed from a third perspective.

[0017] Legend: 1—Side mold, 101—Support leg, 2—Side upsetting mold core, 201—Groove, 3—Upper mold, 301—Upper recess, 4—Mold handle, 5—Upper template, 6—Stop block, 601—Bearing surface, 602—Fixing surface, 7—Lower template, 701—Fixing bolt, 8—Lower mold, 801—Lower recess, 802—Limiting hole, 9—Contact, 10—Push rod, 11—Contact switch. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] like Figures 1 to 4 The diagram shows the structure of a bar stock upsetting die for hot-dip galvanizing a gear shift fork according to an embodiment of this utility model. The bar stock upsetting die includes an upper die 3, a lower die 8, and a side die 1. The mating surfaces of the upper die 3 and the lower die 8 are provided with upsetting recesses for the bar stock. The recesses are open ends that are connected to the sides of the upper die 3 and the lower die 8, and the other side of the recesses is a blind end. The lower die has four limiting holes 802 at its four corners, and the upper die has limiting pins that cooperate with the limiting holes 802 at its four corners. When the upper die and the lower die are closed, the limiting pins and the limiting holes 802 cooperate to leave a gap for overflow between the upper die 3 and the lower die 8. The side die 1 is fixed to the side of the opening end of the recess. When the side die 1 is closed with the upper die 3 and the lower die 8, the gap between the side die 1 and the upper die 3 and the lower die 8 is the blank thickness of the opening end of the gear shift fork.

[0022] In this embodiment of the invention, the upsetting of the shaft end of the shift fork is achieved by setting a groove for bar upsetting on the mating surface of the upper mold 3 and the lower mold 8. When the side mold 1 is closed with the upper mold 3 and the lower mold 8, the gap between the side mold 1 and the upper mold 3 and the lower mold 8 is the blank thickness of the opening end of the shift fork, thus achieving upsetting of the shift fork end. The upsetting of the shaft end and the upsetting of the shift fork end are completed in the same mold. The upsetting of the two parts is completed in one positioning, which provides more accurate material preparation for subsequent processes, and can save materials and processes.

[0023] Specifically, such as Figures 1 to 4A bar upsetting die for hot-dip galvanized automotive shift forks, comprising an upper die 3, a lower die 8, and side dies 1. The mating surfaces of the upper die 3 and the lower die 8 are provided with upsetting recesses for the bar stock, the recesses being open ends that connect to the sides of the upper die 3 and the lower die 8, and the other side of the recess being a blind end. The upper die 3 is fixed to the bottom surface of an upper template 5. A die shank 4 is fixed to the top surface of the upper template 5, the die shank 4 being used to fix the upper die in the movable stamping position of the press. The four corners of the lower die 8... The upper mold has four limiting holes 802, and the four corners of the upper mold have limiting pins that mate with the limiting holes 802. When the upper mold 3 and the lower mold 8 are closed, the limiting pins are inserted into the limiting holes 802, and the limiting pins and limiting holes 802 cooperate to leave a gap for overflow between the upper mold 3 and the lower mold 8. The side mold 1 is fixed to the side of the opening end of the recess. When the side mold 1 is closed with the upper mold 3 and the lower mold 8, the gap between the side mold 1 and the upper mold 3 and the lower mold 8 is the blank thickness of the opening end of the shift fork. The center of the side mold has a groove 201. Specifically, the center of the side mold has a side upsetting die core 2, and the center of the end of the side upsetting die core 2 has a groove 201. When the upsetting die is closed, the axis of the groove is coaxial with the axis of the recess.

[0024] The side mold 1 has support legs 101 on both sides of its bottom surface. The support legs 101 are movably connected to the top surface of the lower mold plate 7 through guide rails. The side mold 1 can reciprocate linearly along the guide rails on the top surface of the lower mold plate 7 under the drive of the hydraulic cylinder.

[0025] The recess is divided into an upper recess 301 and a lower recess 801. The upper recess 301 is located on the bottom surface of the upper mold 3, and the lower recess 801 is located on the top surface of the lower mold 8. When the upsetting mold is closed, the upper recess 301 and the lower recess 801 form the recess.

[0026] The upper die 3 and the lower die 8 are provided with a load-bearing block 6 on the side away from the side die, which is used to withstand the impact force of the side die when the side die is upsetting; the block 6 is provided with a load-bearing surface 601, which is pressed against the side of the upper die 3 and the lower die 8 when closed, in order to withstand the impact force of the side die. At the same time, the fixing surface 602 fixes the block 6 to the worktable surface of the press.

[0027] A limiting ejector rod 10 is provided on the side along the movement direction of the side mold 1. When the ejector rod 10 contacts the side of the upper mold 1 or the lower mold 8, the side upsetting of the bar stock is completed. That is, when the side mold 1 moves back and forth linearly along the guide rail on the top surface of the lower mold plate 7 under the drive of the hydraulic cylinder, the ejector rod 10 will not touch the side of the upper mold 1 or the lower mold 8 at the beginning. Until the upsetting operation reaches the requirements, that is, when the size of the blank meets the requirements, the ejector rod 10 will touch the side of the upper mold 1 or the lower mold 8. At this time, the hydraulic cylinder stops driving the side mold 1 and returns to the origin under the control of the control system.

[0028] The end of the ejector rod 10 away from the upper mold 3 or the lower mold 8 is connected to a contact switch 11. The contact switch 11 controls the termination action of the side mold. Specifically, the contact switch 11 is the tail of the ejector rod. When the ejector rod 10 touches the side of the upper mold 1 or the lower mold 8, the ejector rod 10 will bear a certain pressure. This pressure pushes the contact switch to generate an electrical signal, which is sent to the control system. The control system controls the hydraulic cylinder to stop driving the side mold 1 and return it to the origin according to the electrical signal.

[0029] When the ejector rod 10 touches the side of the upper mold 1 or the lower mold 8, the ejector rod 10 will bear a certain pressure. This pressure will push the contact switch to generate an electrical signal. This structure is common knowledge. Common structures include using a pressure sensor or setting a spring at the tail of the ejector rod so that the ejector rod can slide in the hole of the side mold 1, thereby actuating the contact switch. This is common knowledge known to those in the art and will not be elaborated here.

[0030] Preferably, two ejector rods are provided, symmetrically arranged on both sides of the side mold. Each ejector rod has a threaded section, which can be used to adjust the upsetting termination position of the side mold. Specifically, this embodiment provides a structure in which the contact 9 is threadedly connected to the end of the ejector rod. When adjustment is required, the contact 9 can be rotated to achieve adjustment. Of course, the contact 9 can be fixed by a nut or a threaded hole drilled on the side of the contact 9, with a set screw installed in the threaded hole. This is a structure well known to those skilled in the art and will not be described in detail here.

[0031] The foregoing has broadly outlined some aspects and features of the various embodiments and should be interpreted as merely illustrative of potential applications. Other beneficial results can be obtained by applying the disclosed information in different ways or by combining aspects of the disclosed embodiments. Further aspects and a more complete understanding can be obtained based on the detailed description of exemplary embodiments with reference to the accompanying drawings, within the scope defined by the claims.

[0032] The above embodiments provide a detailed description of the present invention. Of course, the above description is not intended to limit the present invention, nor is the present invention limited to the examples described above. Any changes, modifications, additions, reductions, or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. A hot-dip galvanized bar stock upsetting die for an automotive gear shift fork, characterized in that, The bar stock upsetting die includes an upper die, a lower die, and a side die. The mating surfaces of the upper and lower dies are provided with upsetting recesses for the bar stock. The recesses are open to the sides of the upper and lower dies, and the other side of the recesses is a blind end. The lower die has four limiting holes at its four corners, and the upper die has limiting pins at its four corners that mate with the limiting holes. When the upper and lower dies are closed, the limiting pins and limiting holes create a gap for overflow between the upper and lower dies. The side die is fixed to the side of the opening end of the recess. When the side die is closed with the upper and lower dies, the gap between the side die and the upper and lower dies is equal to the blank thickness at the opening end of the shift fork.

2. The upsetting die for hot-dip galvanized automotive shift fork according to claim 1, characterized in that, The side mold has a groove at its center, and when the upsetting mold is closed, the axis of the groove is coaxial with the axis of the pit.

3. The upsetting die for hot-dip galvanized automotive shift fork according to claim 2, characterized in that, The recess is divided into an upper recess and a lower recess. The upper recess is located on the bottom surface of the upper mold, and the lower recess is located on the top surface of the lower mold. When the upsetting mold is closed, the upper recess and the lower recess form the recess.

4. The upsetting die for hot-dip galvanized automotive shift fork according to claim 3, characterized in that, The upper and lower dies are provided with load-bearing blocks on the side away from the side dies, which are used to withstand the impact force of the side dies when the side dies are upsetting.

5. A bar stock upsetting die for hot-dip galvanizing an automotive shift fork according to any one of claims 1 to 4, characterized in that, A limiting ejector rod is provided on the side along the movement direction of the side mold. When the ejector rod contacts the side of the upper or lower mold, the side upsetting of the bar stock is completed.

6. The upsetting die for hot-dip galvanized automotive shift fork according to claim 5, characterized in that, The end of the ejector rod furthest from the upper or lower mold is connected to a contact switch, which controls the termination action of the side mold.

7. The upsetting die for hot-dip galvanized automotive shift fork according to claim 6, characterized in that, Two ejector pins are provided, symmetrically arranged on both sides of the side mold. Each ejector pin has a threaded section, which can be used to adjust the upsetting termination position of the side mold.

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