Center hole finish machining device

Abstract

The utility model relates to a center hole finish machining device which comprises a stamping assembly, a center hole finish machining assembly and a center hole finish machining assembly, the stamping assembly comprises a pressing head, a working table, an upper die base and a lower die base, the upper die base is fixed to the pressing head and vertically moves along with the pressing head, and the lower die base is fixed to the working table; the material supporting assembly comprises a supporting part, a rotary male die and a positioning chuck, the supporting part is arranged on the working table in a telescopic mode, and the rotary male die is rotatably arranged on the supporting part and used for containing a part to be machined; the rotating assembly comprises a driving unit and a rotating shaft, the driving unit is installed on the upper die base and used for driving the rotating shaft to rotate, and the positioning chuck is fixed to the bottom end of the rotating shaft and used for clamping a part to be machined together with the rotating male die; and the turning assembly comprises a tool turret and a turning tool installed on the tool turret, the tool turret is fixed to the working table top, and the turning tool is used for turning the part to be machined. The center hole finish machining device has the advantages of being high in precision, high in production efficiency, good in product consistency and the like.

Description

Technical Field

[0001] This utility model relates to the field of stamping manufacturing technology, and in particular to a device for precision machining of a center hole. Background Technology

[0002] Currently, for the precision machining of the center hole of rotating parts, machining or punching is usually used. Machining is a traditional part manufacturing method, characterized by high machining accuracy, but its efficiency is lower than that of punching. While punching has the advantages of high production efficiency and good product consistency, its dimensional accuracy is lower than that of machining, and there is also the problem of uneven hole surface, which affects subsequent assembly and use.

[0003] Therefore, there is an urgent need for a new center hole precision machining device that can combine the advantages of high precision, high production efficiency, and good product consistency. Utility Model Content

[0004] The purpose of this invention is to provide a center hole precision machining device that combines the advantages of high precision, high production efficiency, and good product consistency.

[0005] To achieve the above objectives, this utility model provides a center hole finishing device, comprising:

[0006] A stamping assembly includes a press head, a worktable, an upper die holder, and a lower die holder. The upper die holder is fixed to the press head and moves vertically following the press head. The lower die holder is fixed to the worktable.

[0007] The material support assembly includes a support component, a rotating punch, and a positioning chuck. The support component is telescopically mounted on the worktable, and the rotating punch is rotatably mounted on the support component and used to place the part to be processed.

[0008] A rotating assembly includes a drive unit and a rotating shaft. The rotating shaft is rotatably mounted vertically on the upper mold base. The drive unit is mounted on the upper mold base and is used to drive the rotating shaft to rotate. The positioning chuck is fixed to the bottom end of the rotating shaft and is used to clamp the workpiece to be processed together with the rotating punch.

[0009] A turning assembly includes a turret and a turning tool mounted on the turret, the turret being fixed to the worktable, and the turning tool being used to turn the workpiece.

[0010] When the pressure head moves vertically downward, the material support assembly can switch between the loading / unloading state and the clamping state: in the loading / unloading state, there is a gap between the positioning chuck and the rotating punch; in the clamping state, the positioning chuck and the rotating punch jointly clamp the part to be processed.

[0011] Optionally, the lower mold base has a receiving groove, and the material support assembly further includes an elastic element disposed in the receiving groove. The top end of the elastic element is connected to the bottom end of the support member, and the bottom end of the elastic element is connected to the bottom wall of the receiving groove.

[0012] Optionally, the support component includes a material support plate, a base, and several material support rods. The material support plate is mounted on the worktable via the elastic element. The bottom end of each material support rod is connected to the material support plate, and the top end is connected to the base. The rotating punch is rotatably mounted on the base.

[0013] Optionally, the elastic element is a nitrogen spring.

[0014] Optionally, the material support plate is annular, and the material support rods are evenly distributed along the circumference of the material support plate.

[0015] Optionally, the rotating punch is rotatably mounted on the base via a plurality of first bearings.

[0016] Optionally, the rotating shaft is rotatably mounted on the upper mold base via a plurality of second bearings.

[0017] Optionally, the output shaft of the drive motor and the rotating shaft are connected by a belt drive.

[0018] Optionally, the part to be processed has a through hole, and the center hole finishing device further includes a positioning component. The positioning component includes a pressure rod, a positioning sleeve, and a positioning shaft. The pressure rod is fixed on the upper die base and passes through the rotating shaft vertically. The positioning sleeve is disposed at the bottom end of the pressure rod, and the positioning shaft is mounted on the turret. When the pressure head moves vertically downward, the positioning shaft can pass through the through hole vertically and be inserted into the positioning sleeve.

[0019] Optionally, the center hole finishing device further includes a guide assembly, which includes a plurality of guide rods disposed on the upper mold base and a plurality of guide holes formed on the lower mold base. The guide rods correspond one-to-one with the guide holes and can be movably inserted into the corresponding guide holes.

[0020] The center hole finishing device provided by this utility model has at least one of the following beneficial effects:

[0021] 1) The pressure head drives the workpiece to move downward, and the rotating component drives the workpiece to rotate, so that the workpiece performs the action of turning the center hole during the downward movement, thereby ensuring high production efficiency and producing a high-quality and high-precision center hole with good product consistency.

[0022] 2) By setting the positioning component, the pressure rod is positioned and connected to the positioning shaft on the lower turret through the positioning sleeve, which increases the rigidity of the overall mechanism, ensures the accuracy during the turning process, and reduces vibration;

[0023] 3) By setting the guide component, the relative movement between the upper mold base and the lower mold base, as well as the vertical movement of related components, can be positioned and guided, thereby improving the turning accuracy of the center hole. Attached Figure Description

[0024] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

[0025] Figure 1 This is a schematic diagram of the structure of the center hole finishing device provided in an embodiment of the present invention under loading and unloading conditions;

[0026] Figure 2 This is a schematic diagram of the center hole finishing device provided in an embodiment of the present invention in the clamping state.

[0027] in:

[0028] 110-Pressure head; 120-Worktable surface; 130-Upper die holder; 140-Lower die holder; 210-Support component; 211-Material support plate; 212-Base; 213-Material support rod; 220-Rotating punch; 230-Positioning chuck; 240-Elastic element; 310-Drive unit; 320-Rotating shaft; 330-Pulley; 340-Cover plate; 400-Part to be processed; 510-Turret; 520-Lathe tool; 610-First bearing; 620-Second bearing; 710-Pressure rod; 720-Positioning sleeve; 730-Positioning shaft; 810-Guide rod; 820-Guide hole. Detailed Implementation

[0029] To make the objectives, advantages, and features of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are in a very simplified form and use non-precise proportions, intended only to facilitate and clearly illustrate the purpose of the embodiments of this utility model. Please refer to the accompanying drawings for a clearer understanding of the objectives, features, and advantages of this utility model. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes and to enable those skilled in the art to understand and read the content disclosed in the specification. They are not intended to limit the implementation conditions of this utility model. Any modifications to the structure, changes in proportions, or adjustments to the size, provided they produce the same or similar effects and achieve the same objectives as this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0030] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects unless otherwise expressly indicated. As used in this invention, the term “or” is generally used to include “and / or” unless otherwise expressly indicated. As used in this invention, the term “a number” is generally used to include “at least one” unless otherwise expressly indicated. As used in this invention, the term “at least two” is generally used to include “two or more” unless otherwise expressly indicated. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Please refer to Figures 1-2 This embodiment provides a center hole finishing apparatus, including:

[0033] The stamping assembly includes a press head 110, a worktable 120, an upper die holder 130 and a lower die holder 140. The upper die holder 130 is fixed on the press head 110 and moves vertically with the press head 110. The lower die holder 140 is fixed on the worktable 120.

[0034] The material support assembly includes a support member 210, a rotating punch 220 and a positioning chuck 230. The support member 210 is telescopically mounted on the worktable 120, and the rotating punch 220 is rotatably mounted on the support member 210 and used to place the workpiece 400 to be processed.

[0035] The rotating assembly includes a drive unit 310 and a rotating shaft 320. The rotating shaft 320 is rotatably mounted vertically on the upper mold base 130. The drive unit 310 is mounted on the upper mold base 130 and is used to drive the rotating shaft 320 to rotate. The positioning chuck 230 is fixed to the bottom end of the rotating shaft 320 and is used to clamp the workpiece 400 to be processed together with the rotating punch 220.

[0036] The turning assembly includes a turret 510 and a turning tool 520 mounted on the turret 510. The turret 510 is fixed on the worktable 120, and the turning tool 520 is used to turn the workpiece 400 to be machined.

[0037] When the pressure head 110 moves vertically downward, the material support assembly can switch between the loading / unloading state and the clamping state: in the loading / unloading state, there is a gap between the positioning chuck 230 and the rotating punch 220; in the clamping state, the positioning chuck 230 and the rotating punch 220 jointly clamp the workpiece 400 to be processed.

[0038] The pressure head 110 drives the workpiece 400 to move downwards, while the rotating component drives the workpiece 400 to rotate, so that the workpiece 400 performs the action of turning the center hole during the downward movement. This ensures that the center hole with high quality and precision can be processed while maintaining high production efficiency and good product consistency.

[0039] Specifically, in the loading and unloading state, there is a gap between the upper mold base 130 and the lower mold base 140, which is the mold opening state, so that the part to be processed can be placed on the rotating punch 220. When the center hole of the part to be processed 400 needs to be precision machined, the pressure head 110 is driven down and the upper mold base 130 is driven down. The lower mold base 140 is fixed throughout the process.

[0040] In this embodiment, the support member 210 is telescopically mounted on the worktable 120. Specifically, a receiving groove is formed on the lower mold base 140, and the material support assembly also includes an elastic element 240 disposed within the receiving groove. The top end of the elastic element 240 is connected to the bottom end of the support member 210, and the bottom end of the elastic element 240 is connected to the bottom wall of the receiving groove. When the material support assembly is in the loading / unloading state, the elastic element 240 naturally extends. This can be understood as the elastic element 240 bearing only the weight of the supporting component 210, the rotating punch 220, and the workpiece 400. It may be slightly compressed. When the pressure head 110 descends, driving the upper die holder 130 and the rotating assembly downwards, the positioning chuck 230 contacts the workpiece 400 and, together with the rotating punch 220, clamps the workpiece 400. As the pressure head 110 continues to descend, the workpiece 400 descends under the combined clamping of the positioning chuck 230 and the rotating punch 220. The supporting component 210 and the rotating punch 220 follow, and the elastic element 240 is compressed. After the workpiece 400 completes the center hole machining, as the pressure head 110 rises, driving the upper die holder 130 upwards to open the die, the supporting component 210 can reset under the action of the elastic element 240. The entire material support assembly returns to the loading / unloading state, facilitating the machining of the next workpiece.

[0041] Furthermore, the support component 210 includes a material support plate 211, a base 212, and several material support rods 213. The material support plate 211 is mounted on the worktable surface 120 via an elastic element 240. The bottom end of the material support rod 213 is connected to the material support plate 211, and the top end is connected to the base 212. The rotating punch 220 is rotatably mounted on the base 212. In this embodiment, when or before the material support plate 211 contacts the worktable surface 120, the turning assembly can complete the turning of the center hole of the workpiece 400. This can also be understood as follows: as the pressure head 110 continues to descend, the workpiece 400 descends under the combined clamping of the positioning chuck 230 and the rotating punch 220. The support component 210 and the rotating punch 220 follow, and the elastic element 240 is continuously compressed. Simultaneously, the drive unit 310 drives the rotating shaft 320 to rotate and drives the positioning chuck 230 to rotate, thereby driving the workpiece 400 and the rotating punch 220 to rotate. The punch 220 rotates, so the workpiece 400 simultaneously moves downward and rotates. When the workpiece 400 moves downward and contacts the cutting tool 520, it performs a turning action. When the workpiece 400 moves downward to the bottom dead center, the turning is completed. The position of the bottom dead center is, for example, the point where the support plate 211 contacts the worktable surface 120, or it can be the point where the elastic element 240 is compressed to its limit, or the bottom dead center can be set separately to limit the downward movement of the support plate 211. This utility model does not limit this. During this process, the support component 210 only moves downward and does not rotate.

[0042] In this embodiment, the elastic element 240 includes, but is not limited to, a nitrogen spring.

[0043] In this embodiment, the material support plate 211 is annular, and the material support rods 213 are evenly distributed along the circumference of the material support plate 211. The present invention does not limit the number of material support rods 213.

[0044] Furthermore, the rotating punch 220 is rotatably mounted on the base 212 via a plurality of first bearings 610. In this embodiment, there are two contact points between the rotating punch 220 and the base 212, so there are two first bearings 610. The bearing located outside the rotating punch 220 is a ball bearing, and the bearing located below the rotating punch 220 is a thrust bearing.

[0045] Please continue to refer to Figure 1 and Figure 2 The rotating assembly includes a drive unit 310, a rotating shaft 320, and a positioning chuck 230. The drive unit 310 includes, but is not limited to, a drive motor, which drives the rotating shaft 320 to rotate via belt drive or other means. The positioning chuck 230 is fixed to the bottom end of the rotating shaft 320 and rotates with the rotating shaft 320. In this embodiment, a pulley 330 is sleeved on the outer side of the rotating shaft 320, and the pulley 330 is connected to the output shaft of the drive motor via a belt.

[0046] The rotating shaft 320 is rotatably mounted on the upper mold base 130 via several second bearings 620. In this embodiment, there are two contact points between the rotating shaft 320 and the upper mold base 130, hence the number of second bearings 620 is two, both of which are ball bearings. In addition, to ensure the rotational accuracy of the rotating shaft 320, its bottom end is rotatably connected to a cover plate 340 via a ball bearing, and the cover plate 340 is connected to the upper mold base 130.

[0047] Preferably, the workpiece to be machined has a through hole, and the center hole finishing device further includes a positioning assembly. The positioning assembly includes a pressure rod 710, a positioning sleeve 720, and a positioning shaft 730. The pressure rod 710 is fixed on the upper die holder 130 and passes vertically through the rotating shaft 320. The positioning sleeve 720 is located at the bottom end of the pressure rod 710, and the positioning shaft 730 is mounted on the turret 510. When the pressure head moves vertically downward, the positioning shaft 730 can pass vertically through the through hole and insert into the positioning sleeve 720. By setting the positioning assembly, the pressure rod 710 is positioned and connected to the positioning shaft 730 on the lower turret 510 through the positioning sleeve 720, which increases the rigidity of the overall mechanism, ensures the accuracy during the turning process, and reduces vibration.

[0048] Preferably, the center hole finishing device further includes a guide assembly, which includes a plurality of guide rods 810 disposed on the upper die holder 130 and a plurality of guide holes 820 formed on the lower die holder 140. The guide rods 810 and guide holes 820 correspond one-to-one and can be movably inserted into the corresponding guide holes 820. In this embodiment, the guide assembly is mainly used to position and guide the relative movement between the upper die holder 130 and the lower die holder 140 and the vertical movement of related components, thereby improving the turning accuracy of the center hole.

[0049] Based on this, the present invention also provides a processing method for the center hole finishing device as described above, specifically including the following steps:

[0050] S1. In the initial state, the material support assembly is in the loading and unloading state. At this time, the part to be processed 400 can be placed on the rotating punch 220 by the robot arm.

[0051] S2. The pressure head 110 is driven to move downward and drive the upper die holder 130 and the rotating assembly downward. At the same time, the rotating shaft 320 is driven to rotate by the drive unit 310 and drive the positioning chuck 230 to rotate. The positioning chuck 230 moves downward and contacts the workpiece 400 to be processed and clamps the workpiece 400 to be processed together with the rotating punch 220. As the pressure head 110 continues to move downward, the workpiece 400 to be processed moves downward and rotates under the joint clamping of the positioning chuck 230 and the rotating punch 220.

[0052] S3. When the clamped workpiece 400 comes into contact with the cutting tool 520 on the turret 510, the turning process begins, and the press continues to descend until the bottom dead center.

[0053] S4. After the center hole of the workpiece 400 is processed, the pressure head 110 is driven to move upward to drive the upper mold base 130 to move upward to open the mold. The support component 210 can be reset under the action of the elastic element 240, and the entire material support assembly is restored to the loading and unloading state. At this time, the workpiece 400 can be smoothly removed by the robot arm so as to facilitate the processing of the next workpiece.

[0054] In summary, this utility model provides a center hole finishing device. The pressure head 110 drives the workpiece 400 to move downward, while the rotating component drives the workpiece 400 to rotate. This allows the workpiece 400 to perform a turning action on the center hole during its downward movement, thereby ensuring high production efficiency while producing a center hole with high quality and precision, and good product consistency.

[0055] Furthermore, it should be understood that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention's technical solutions using the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention's technical solutions. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention's technical solutions, shall still fall within the protection scope of the present invention's technical solutions.

Claims

1. A center hole finishing apparatus, characterized in that, include: A stamping assembly includes a press head, a worktable, an upper die holder, and a lower die holder. The upper die holder is fixed to the press head and moves vertically following the press head. The lower die holder is fixed to the worktable. The material support assembly includes a support component, a rotating punch, and a positioning chuck. The support component is telescopically mounted on the worktable, and the rotating punch is rotatably mounted on the support component and used to place the part to be processed. A rotating assembly includes a drive unit and a rotating shaft. The rotating shaft is rotatably mounted vertically on the upper mold base. The drive unit is mounted on the upper mold base and is used to drive the rotating shaft to rotate. The positioning chuck is fixed to the bottom end of the rotating shaft and is used to clamp the workpiece to be processed together with the rotating punch. A turning assembly includes a turret and a turning tool mounted on the turret, the turret being fixed to the worktable, and the turning tool being used to turn the workpiece. When the pressure head moves vertically downward, the material support assembly can switch between the loading / unloading state and the clamping state: in the loading / unloading state, there is a gap between the positioning chuck and the rotating punch; in the clamping state, the positioning chuck and the rotating punch jointly clamp the part to be processed.

2. The center hole finishing apparatus according to claim 1, characterized in that, The lower mold base has a receiving groove, and the material support assembly also includes an elastic element disposed in the receiving groove. The top end of the elastic element is connected to the bottom end of the support component, and the bottom end of the elastic element is connected to the bottom wall of the receiving groove.

3. The center hole finishing apparatus according to claim 2, characterized in that, The supporting component includes a material support plate, a base, and several material support rods. The material support plate is set on the worktable surface through the elastic element. The bottom end of the material support rod is connected to the material support plate, and the top end is connected to the base. The rotating punch is rotatably set on the base.

4. The center hole finishing apparatus according to claim 3, characterized in that, The elastic element is a nitrogen spring.

5. The center hole finishing apparatus according to claim 3, characterized in that, The material support plate is ring-shaped, and the material support rods are evenly distributed along the circumference of the material support plate.

6. The center hole finishing apparatus according to claim 3, characterized in that, The rotating punch is rotatably mounted on the base via several first bearings.

7. The center hole finishing apparatus according to claim 1, characterized in that, The rotating shaft is rotatably mounted on the upper mold base via several second bearings.

8. The center hole finishing apparatus according to claim 1, characterized in that, The output shaft of the drive unit is connected to the rotating shaft via a belt drive.

9. The center hole finishing apparatus according to claim 1, characterized in that, The workpiece to be processed has a through hole. The center hole finishing device also includes a positioning component. The positioning component includes a pressure rod, a positioning sleeve and a positioning shaft. The pressure rod is fixed on the upper die base and passes through the rotating shaft vertically. The positioning sleeve is disposed at the bottom end of the pressure rod. The positioning shaft is installed on the turret. When the pressure head moves vertically downward, the positioning shaft can pass through the through hole vertically and be inserted into the positioning sleeve.

10. The center hole finishing apparatus according to claim 1, characterized in that, The center hole finishing device also includes a guide assembly, which includes a plurality of guide rods disposed on the upper mold base and a plurality of guide holes opened on the lower mold base. The guide rods correspond one-to-one with the guide holes and can be movably inserted into the corresponding guide holes.

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