Die transposition device of forging component forming machine

Abstract

The invention discloses a die transposition device of a forging component forming machine. The die transposition device comprises a base, a transmission mechanism arranged on the base, a lead piece pivoted on the base, a die seat pivoted on the base, and a plurality of stamping dies detachably arranged on the die seat, the transmission mechanism can drive the lead part to rotate, the die base rotates by a specific angle each time through the stroke design on the lead part, and then the stamping dies rotate in sequence, so that the stamping dies can rotate in different stations to cyclically carry out different operations such as feeding, multiple times of forming and discharging. Clamping equipment which is complex in structure and high in precision requirement does not need to be used for station alternation, so that the cost and the reserved space can be greatly reduced, and the overall space utilization rate is effectively improved.

Description

Technical Field

[0001] The invention relates to a device for exchanging die positions, in particular to a die position exchanging device used in a forging part forming machine. Background Art

[0002] The forming machine generally used for forging screws and other parts first puts the blank into the die, and then uses a punch to press the die to forge the blank. Then, the blank that has completed the first stage of forging is ejected from the die through the ejection mechanism, and then the clamping mechanism clamps the blank and transfers it to the next different die for the second forging. After several processes of stamping, ejection, clamping and transfer, the blank can be formed into the required parts.

[0003] The current forging parts forming machine arranges the molds required for executing different processes in a horizontal direction at intervals, and needs to set a through-out mechanism for each mold. A clamping mechanism is also required between two adjacent molds, which greatly increases the complexity of the mechanism and occupies most of the space, reducing space utilization. In addition, during the forming process of the traditional forging parts forming machine, the punch and the mold will repeatedly impact, and these forming stations are densely arranged together, causing the mold to easily heat up and shorten its service life, or require the installation of a cooling system, and even limit the overall production speed. On the other hand, space often needs to be reserved above the mold to set up a clamping mechanism, so it is impossible to set up multiple layers of molds in a stacked manner, resulting in the molds being able to be set up horizontally in a single row, with a low setting density and unable to improve space utilization.

[0004] In addition, the traditional forging parts forming machine uses a clamping mechanism to transfer workstations. When clamping the blank, the clamping mechanism needs to be positioned in front of the die, and when forming, the clamping mechanism needs to be transferred to a retreat position to avoid the punch. Since the blank is mostly slender, and the speed of the workstation transfer is extremely fast, how to make the clamping mechanism accurately and quickly clamp and place the blank becomes a thorny problem for the mechanism designer. This kind of high-precision clamping mechanism often has a very complex linkage design, which leads to inconvenience in repairing and replacing parts and a huge increase in overall costs. When the clamping mechanism moves too slowly or retreats to the wrong position during forming due to improper adjustment, it is easy to be hit by the punch, causing damage to the clamping mechanism, die, and punch. Summary of the invention

[0005] The object of the present invention is to provide a mold replacement device which has high space utilization and does not require a clamping mechanism.

[0006] The die replacement device of the forging part forming machine of the present invention is characterized in that: the die replacement device comprises a base, a transmission mechanism arranged on the base, a guide member pivotally arranged on the base, a die seat, and a plurality of stamping dies, the guide member comprises a barrel portion driven and rotated by the transmission mechanism, the barrel portion is recessed on the outer peripheral surface to form a plurality of guide grooves, each guide groove extends from one end of the barrel portion to the other end along the axial and circumferential arc, the die seat comprises a transfer shaft pivotally arranged in the base, a coaxial connecting shaft A steering member connected to one end of the indexing shaft and facing the guide member, and a bearing member coaxially connected to the other end of the indexing shaft, the steering member having a disc body portion, and a plurality of convex column portions extending from the disc body portion along the axial direction of the disc body portion toward the guide member and arranged in an annular manner. When the guide member rotates, the convex column portions will engage with the guide grooves in sequence and move along the corresponding guide grooves to drive the disc body portion to rotate. The stamping die can be detached and arranged in an annular manner on the bearing member.

[0007] The die replacement device of the forging part forming machine of the present invention is characterized in that the rotation axis of the barrel portion of the guide member is perpendicular to the rotation axis of the disk portion of the steering member, and the rotation axis of the barrel portion is not coplanar with the rotation axis of the disk portion.

[0008] The die shifting device of the forging parts forming machine described in the present invention is characterized in that: the shifting shaft of the die seat has an axial body portion with one end connected to the disc body portion of the steering member, and a plurality of driving tooth portions protruding from the other end of the axial body portion toward the supporting member, the supporting member has an axle seat portion locked with the axial body portion, and a plurality of transmission tooth portions protruding from the axle seat portion toward the axial body portion and meshing with the driving tooth portions, and a bearing portion protruding from the axle seat portion in a direction opposite to the transmission tooth portion and for the stamping die to be set.

[0009] The die replacement device of the forging part forming machine described in the present invention is characterized in that: the base has a main seat body surrounding the through groove, and a sleeve rotatably accommodated in the through groove, and the sleeve surrounds and covers at least a portion of the transfer shaft and the bearing member.

[0010] The die replacement device of the forging part forming machine of the present invention is characterized in that: the transmission mechanism includes a power source, a driving shaft pivotally mounted on the main seat body of the base and driven to rotate by the power source, a driving gear arranged on the driving shaft, a driven shaft pivotally mounted on the main seat body and fixedly mounted on the barrel portion of the guide member, and a driven gear arranged on the driven shaft and meshing with the driving gear.

[0011] The mold replacement device of the forging part forming machine described in the present invention is characterized in that the main seat body of the base surrounds an installation space connected to the through groove, and the base also includes a mounting platform that is detachably arranged in the installation space and for rotatably placing the part of the support member not surrounded by the sleeve.

[0012] The mold replacement device of the forging part forming machine described in the present invention is characterized in that: the mounting platform of the base has two straight surfaces connected to each other, and a guide inclined surface connected to one of the straight surfaces and extending obliquely, the base also includes two pads protruding in the mounting space and respectively abutting against the straight surfaces, and a limit block that can be adjusted and movably arranged in the mounting space and abuts against the guide inclined surface.

[0013] The die replacement device of the forging parts forming machine of the present invention is characterized in that the central axis of the stamping die is parallel to the central axis of the transfer shaft, the steering member, and the bearing member.

[0014] The beneficial effect of the present invention is that the transmission mechanism can drive the guide member to rotate, and at this time the guide groove will engage with the convex column portion in sequence, thereby driving the disc body to rotate, so that the stamping die located on the die seat rotates around the central axis of the die seat. Through the design of the number of the guide grooves and the extension path, the disc body can be rotated by a specific angle each time, so that the stamping die can be rotated in sequence, so that the stamping die can be rotated in different stations to cyclically perform different operations such as feeding, multiple molding, and passing. This kind of alternating processing also allows the stamping die to obtain cooling time to solve the problem of temperature rise. The ring-shaped arrangement design of the stamping dies allows them to be arranged more closely, and there is no need to use clamping equipment and passing equipment to take the blank out of the stamping die when switching workstations. Therefore, it is possible to avoid setting up clamping equipment with complex mechanisms and high precision requirements, and only one set of passing mechanisms is required for discharging materials. In addition, there is no need to reserve space for setting up clamping equipment, so the utilization rate of the space can be greatly improved. At the same time, it also eliminates the risk of damaging the punch and the die due to improper adjustment of the clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view illustrating an embodiment of a die replacement device of a forging part forming machine according to the present invention;

[0016] Figure 2 It is a top view cross-sectional diagram, showing Figure 1 The top view cross-sectional appearance of

[0017] Figure 3 is a three-dimensional diagram, illustrating the three-dimensional appearance of the embodiment viewed from another angle;

[0018] Figure 4is a fragmentary rear view illustrating the driven shaft and the guide member in the described embodiment;

[0019] Figure 5 is a perspective exploded view illustrating a mold base in the embodiment;

[0020] Figure 6 is a side view, showing Figure 1 a side cross-sectional aspect of; and

[0021] Figure 7 It is an incomplete front view, illustrating the transposition method of the present invention. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0023] See also Figure 1 and Figure 2 The embodiment of the die replacement device of the forging part forming machine of the present invention comprises a base 1, a transmission mechanism 2 arranged on the base 1, a guide member 3 pivotally arranged on the base 1, a die seat 4 pivotally arranged in the base 1, and four stamping dies 5 detachably arranged on the die seat 4. The base 1 comprises a main seat body 11 surrounding a through groove 111 and defining an installation space 112, a shaft sleeve 12 rotatably pivotally arranged in the through groove 111, and two pads 13 protruding from the main seat body 11 into the installation space 112 (shown in FIG. 1 and FIG. 2 ). Figure 1 and Figure 2 ), a limit block 14 which is adjustable and movably arranged on the main seat body 11 and located in the installation space 112, and a mounting platform 15 which is limited in the installation space 112 by the cushion block 13 and the limit block 14. The installation space 112 is open and communicates with the through slot 111. The mounting platform 15 has two straight surfaces 151 which are connected to each other and perpendicular to each other, and a guide inclined surface 152 which connects one of the straight surfaces 151 and extends obliquely. The straight surface 151 and the guide inclined surface 152 are respectively pressed against the cushion block 13 and the limit block 14. Two adjustment screws pass through the limit block 14 and are locked on the main seat body 11. By tightening the adjustment screw corresponding to the limit block 14, the limit block 14 can be forced to press against the guide inclined surface 152 with its own inclined surface, thereby positioning the mounting platform 15 in the installation space 112.

[0024] See also Figure 1 , Figure 2 ,and Figure 3The transmission mechanism 2 includes a power source 21, a driving shaft 22 pivotally mounted on the main body 11, a driving gear 23 mounted on the driving shaft 22, a driven shaft 24 pivotally mounted on the main body 11, and a driven gear 25 mounted on the driven shaft 24 and meshing with the driving gear 23. The power source 21 can be mounted on the main body 11 or other locations of the forging part forming machine, and drives the driving shaft 22 to rotate through structural connections or other transmission components. Figure 2 , Figure 3 ,and Figure 4 The guide member 3 includes a barrel portion 31 fixedly sleeved on the driven shaft 24. The barrel portion 31 forms a plurality of guide grooves 311, and the path lengths and extension directions of the guide grooves 311 are not completely the same, but generally each guide groove 311 extends from one end of the barrel portion 31 to the other end along the axial and circumferential arcs.

[0025] See also Figure 2 , Figure 5 ,and Figure 6 The die seat 4 includes an indexing shaft 41 pivotally arranged in the sleeve 12, a steering member 42 coaxially connected to one end of the indexing shaft 41 and facing the guide member 3, and a bearing member 43 coaxially connected to the other end of the indexing shaft 41. The central axis of the stamping die 5 is parallel to the central axes of the indexing shaft 41, the steering member 42, and the bearing member 43. The indexing shaft 41 has an axial body portion 411 with one end locked to the steering member 42, and a plurality of driving tooth portions 412 protruding from the other end of the axial body portion 411 toward the bearing member 43. The steering member 42 has a disk body portion 421 locked to the axial body portion 411, and twelve boss portions 422 protruding from the disk body portion 421 along the axial direction toward the guide member 3 and arranged in an annular manner. The carrier 43 has a shaft seat 431 locked with the shaft body 411, a plurality of transmission teeth 432 protruding from the shaft seat 431 toward the shaft body 411 and meshing with the driving teeth 412, and a bearing head 433 protruding from the shaft seat 431 in a direction opposite to the transmission teeth 432 and rotatably pivoted in the mounting platform 15. The shaft body 411 is axially penetrated and locked on the shaft seat 431 through four screws. The driving teeth 412 and the transmission teeth 432 can effectively transmit torque, avoid the screws locking the shaft seat 431 and the shaft body 411 from being easily damaged due to excessive shear force, and are also easy to disassemble and assemble. The stamping die 5 is detachably arranged on the bearing head 433. In this embodiment, the bearing head 433 is recessed to form four grooves 434 to respectively accommodate the stamping die 5, but this is not limited to the actual application.

[0026] See also Figure 1 , Figure 2 ,and Figure 3 The operation of the mold replacement device is described below: after the power source 21 is started, the power source 21 will drive the driving shaft 22 to rotate, and the driving shaft 22 will drive the driven shaft 24 and the guide member 3 to rotate together through the driving gear 23 and the driven gear 25. When the guide member 3 rotates, the guide groove 311 will guide the three adjacent boss portions 422 therein, and guide the boss portions 422 to move along the guide groove 311 respectively. In the aforementioned process, the boss portions 422 will be displaced along the circumferential direction of the disk body portion 421, thereby driving the disk body portion 421 to rotate. After the boss portions 422 are separated from the guide groove 311 respectively, three other adjacent boss portions 422 will be guided into the guide groove 311. Through the design of the path extension direction and length of the guide groove 311, the rotation stroke of the disk body portion 421 can be controlled, thereby making the die seat 4 rotate in units of 90 degrees, and finally making the four stamping dies 5 able to switch in four stations in turn. This mechanism design can have the precision and quality of 0 backlash, avoiding the backlash problem caused by the use of gears in the traditional clamping mechanism. At the same time, the stamping die 5 can also be cooled at a station not used for forming, which effectively overcomes the problem of temperature rise, thereby extending the service life of the stamping die 5 and increasing the production speed.

[0027] Since the guide member 3, the steering member 42, and the bearing portion 433 of the present invention are all designed to be easily replaced, the present embodiment can also be adjusted by replacing the aforementioned components according to actual molding or process requirements, thereby improving versatility and flexibility. At the same time, by controlling the number of the stamping dies 5, the number and extension paths of the guide grooves 311, and the number of the convex column portions 422, the angle of each rotation of the die holder 4 can be adjusted, thereby ensuring that each stamping die 5 can be correctly rotated to each station in sequence.

[0028] See also Figure 1 , Figure 3 ,and Figure 7 Next, the actual forging of parts is described: First, any stamping die 5 is rotated to Figure 7When the first station A in the lower left corner is used, the blank will be pushed into the stamping die 5 at the position through other mechanisms, and when it rotates to the second station B in the upper left corner, the other power mechanisms of the forging parts forming machine will drive the punch to perform the first stamping and forming on the stamping die 5 at the position, so that the blank in the stamping die 5 is initially forged, and then when it rotates to the third station C in the upper right corner, another punch will perform the second stamping and forming on the stamping die 5, so that the blank is forged into a product. Finally, it will rotate to the fourth station D in the lower right corner. At this time, the forging parts forming machine will drive a through-out mechanism to drive the corresponding push rod to pass the product in the stamping die 5 out, thereby forging a product. It should be noted that when one of the stamping dies 5 is located at any station to perform the corresponding process, the other stamping dies 5 are also located at different stations and perform the corresponding process at the same time. Therefore, with the continuous rotation of the bearing head 433, a large number of products can be forged quickly and continuously.

[0029] In summary, in the process of the present invention, only one station needs to pass the blank, so only one set of passing mechanisms is required, so that the mechanism can be designed in layers and the mechanical complexity of the forging part forming machine can be effectively reduced. In addition, the stamping die 5 changes the station through the rotation of the die base 4, so there is no need to set a clamping mechanism with high complexity and difficult to control accuracy, which can also reduce the required reserved space and greatly improve the space utilization, so the purpose of the present invention can be achieved.

Claims

1. A die replacement device for a forging part forming machine, characterized in that: The die replacement device comprises a base, a transmission mechanism arranged on the base, a guide member pivotally arranged on the base, a die seat, and a plurality of stamping dies, wherein the guide member comprises a barrel portion driven and rotated by the transmission mechanism, the barrel portion is recessed on the outer peripheral surface to form a plurality of guide grooves, each guide groove extending from one end of the barrel portion to the other end along an axial and circumferential arc, the die seat comprises an indexing shaft pivotally arranged in the base, a steering member coaxially connected to one end of the indexing shaft and facing the guide member, and a bearing member coaxially connected to the other end of the indexing shaft, the steering member comprises a disc portion, and a plurality of convex column portions protruding from the disc portion toward the guide member along the axial direction of the disc portion and arranged in an annular manner with intervals from each other, when the guide member rotates, the convex column portions will mesh with the guide grooves in sequence, and each will move along the corresponding guide grooves to drive the disc portion to rotate, and the stamping dies are detachable and arranged in an annular manner with intervals from each other on the bearing member.

2. The die replacement device of the forging part forming machine according to claim 1, characterized in that: The rotation axis of the barrel portion of the guide member is perpendicular to the rotation axis of the disc portion of the steering member, and the rotation axis of the barrel portion is not coplanar with the rotation axis of the disc portion.

3. The die replacement device of the forging part forming machine according to claim 1, characterized in that: The transfer shaft of the die seat has an axial body portion with one end connected to the disc body portion of the steering member, and a plurality of driving tooth portions protruding from the other end of the axial body portion toward the supporting member, the supporting member has an axle seat portion locked with the axial body portion, and a plurality of transmission tooth portions protruding from the axle seat portion toward the axial body portion and meshing with the driving tooth portions, and a bearing portion protruding from the axle seat portion in a direction opposite to the transmission tooth portion and for the stamping die to be set.

4. The die replacement device of the forging part forming machine according to claim 1, characterized in that: The base has a main seat body surrounding a through slot, and a shaft sleeve rotatably accommodated in the through slot, wherein the shaft sleeve surrounds and covers at least a portion of the indexing shaft and the bearing member.

5. The die replacement device of the forging part forming machine according to claim 4 is characterized in that: The transmission mechanism includes a power source, a driving shaft pivotally mounted on the main seat body of the base and driven to rotate by the power source, a driving gear arranged on the driving shaft, a driven shaft pivotally mounted on the main seat body and for fixing the barrel portion of the guide member, and a driven gear arranged on the driven shaft and meshing with the driving gear.

6. The die replacement device of the forging part forming machine according to claim 4, characterized in that: The main seat body of the base surrounds an installation space connected to the through groove, and the base also includes a mounting platform which is detachably arranged in the installation space and for rotatably placing the part of the bearing member not surrounded by the sleeve.

7. The die replacement device of the forging part forming machine according to claim 6, characterized in that: The mounting platform of the base has two straight surfaces connected to each other, and a guide inclined surface connecting one of the straight surfaces and extending obliquely. The base also includes two pads protruding from the mounting space and respectively abutting against the straight surfaces, and a limit block that can be adjusted and movably arranged in the mounting space and abuts against the guide inclined surface.

8. The die replacement device of the forging part forming machine according to claim 1, characterized in that: The central axis of the stamping die is parallel to the central axes of the indexing shaft, the steering member, and the bearing member.

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