A device for rounding and finishing a metal part
The metal part rounding and repair device, which combines a conical guide pin and a rounding block, solves the problem of low efficiency in deburring and repairing small-diameter relay iron sheets. It achieves efficient and precise hole wall leveling and equipment flexibility, thereby improving safety and production efficiency.
Patent Information
- Application Number
- CN202521910983.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-05
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-05
AI Technical Summary
In the existing technology, the deburring and repair methods for small-diameter relay iron sheets are inefficient, inconsistent, and prone to damaging the hole wall, posing a significant environmental risk. They are also difficult to control in terms of size and are prone to generating new burrs, making it difficult to achieve efficient, consistent, and high-quality hole wall leveling at the same time.
It adopts a combination structure of conical guide pin and radially expandable round block, and achieves uniform extrusion and finishing through the stamping process. Combined with quick-change locking mechanism and buffer ejection mechanism, it realizes rapid replacement and shock-absorbing stable support.
It achieves efficient burr removal, precise hole diameter calibration, improved hole wall quality, enhanced equipment versatility and production flexibility, and improved operational safety and efficiency.
Smart Images
Figure CN224673608U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of metal parts processing technology, and in particular to a metal parts rounding and finishing processing device. Background Technology
[0002] As a key structural component of the relay electromagnetic system, the dimensional accuracy and surface quality of the central circular hole in the relay sheet directly affect the assembly accuracy of the magnetic core and the overall performance of the relay. These parts are typically formed in one piece using high-precision stamping dies, resulting in high production efficiency and controllable costs. However, during the stamping process, due to factors such as material shearing deformation, die edge wear, and gaps, microscopic burrs or corner collapses are unavoidable on the inner wall of the circular hole. These defects not only cause localized reductions in the inner diameter of the hole, exceeding tolerance limits, but also severely affect the smooth pressing and positioning accuracy of the magnetic core, and may even cause relay malfunctions. Therefore, the stamped sheet often requires a secondary finishing process to calibrate and repair the circular hole.
[0003] In existing technologies, deburring and finishing of such small-diameter holes typically employs methods such as manual grinding, chemical polishing, or mechanical reaming. Manual operation is inefficient, inconsistent, and prone to scratching the hole wall; chemical polishing presents environmental and safety concerns, and has limited control over dimensional accuracy; while traditional mechanical reaming can guarantee dimensions, it is a cutting process that may generate new cutting burrs, and the tools are prone to wear, resulting in higher costs. Furthermore, none of the above methods can simultaneously achieve high efficiency, high consistency, and high-quality hole wall smoothing.
[0004] Therefore, it is necessary to design a metal parts rounding and finishing processing device to solve the above-mentioned technical problems. Utility Model Content
[0005] In order to overcome the shortcomings of existing technologies, which mostly use manual grinding, chemical polishing or mechanical reaming for deburring and finishing small holes, such as low efficiency, poor consistency, easy damage to hole walls, environmental risks, difficulty in dimensional control, easy generation of new burrs, rapid tool wear and high cost, and difficulty in simultaneously meeting the requirements of high efficiency, high consistency and high quality leveling, this utility model provides a metal parts rounding and finishing processing device.
[0006] The technical implementation scheme of this utility model is as follows: a metal parts rounding and finishing processing device, including a stamping machine body, a stamping head, a mounting base, a fixing plate, rounding blocks, reinforcing ribs, a guide pin, and a first spring. The stamping head is provided on the upper part of the stamping machine body, and the mounting base is symmetrically fixedly connected to the lower part of the stamping machine body. A fixing plate is placed between the two mounting bases. Multiple rounding blocks are slidably connected in a ring array in the middle of the fixing plate. Reinforcing ribs are connected between the lower parts of the outer sides of the multiple rounding blocks. A guide pin is slidably placed between the multiple rounding blocks. The top diameter of the guide pin is larger than the bottom diameter, so the inner sides of the multiple rounding blocks are all in contact with the outer side of the guide pin. A first spring is connected between the guide pin and the fixing plate.
[0007] In one embodiment, the device further includes guide blocks, connecting blocks, screws, handwheels, locking blocks, and positioning pins. Guide blocks are fixedly connected to both sides of the top of the two mounting bases. Each guide block has a limit groove on one side. A connecting block is fixedly connected between the two guide blocks on the same side. A screw is rotatably connected to the top of each connecting block. A handwheel is fixedly connected to the top of each screw. A locking block is threadedly connected to each screw. Each locking block slides inside the corresponding two limit grooves. Four locking grooves are provided on both sides of the fixing plate. Four positioning pins are fixedly connected to the bottom of the two locking blocks. Each positioning pin is locked into the corresponding locking groove.
[0008] In one embodiment, the two guide blocks on the same side are symmetrically distributed.
[0009] In one embodiment, the device further includes a sleeve, a sliding rod, a second spring, and an abutment ring. Two sleeves are fixedly connected to both sides of the fixing plate. A sliding rod is slidably connected inside each sleeve. A second spring is connected between each sliding rod and the corresponding sleeve. An abutment ring is fixedly connected between the tops of the four sliding rods.
[0010] In one embodiment, multiple expanding blocks are located at the center of the abutment ring.
[0011] In one embodiment, the guide needle is located below the stamping head.
[0012] The present invention has the following advantages: 1. The present invention adopts a structure in which a conical guide pin is used in conjunction with four radially expandable rounding blocks to uniformly extrude and repair the inner wall of the circular hole of the part during the stamping process, thereby achieving the effect of efficiently removing stamping burrs, accurately calibrating the hole diameter and improving the surface quality of the hole wall, and effectively solving the problem that the inner diameter of the relay iron sheet is too small due to burrs and does not meet the assembly requirements.
[0013] 2. This utility model, by setting a quick-change locking mechanism consisting of a handwheel, screw, locking block and positioning pin, can realize the quick replacement and precise positioning of the fixed plate and its upper expanding block assembly, so as to meet the processing needs of parts of different specifications and significantly improve the equipment versatility and production flexibility.
[0014] 3. This utility model provides a buffer ejection mechanism consisting of a sleeve, a slide bar, a second spring, and a stop ring on the fixed plate. This mechanism plays a role in shock absorption and stable support during the stamping process. After completion, it automatically ejects the part from the processing position, thereby protecting the part from impact damage and facilitating the operator to pick up the part, thus improving the safety and efficiency of the operation. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0016] Figure 2 This is a three-dimensional structural diagram of the stamping head, mounting base, and fixing plate of this utility model.
[0017] Figure 3 This is a three-dimensional structural diagram of the components of this utility model, including the circular block, reinforcing rib, and guide needle.
[0018] Figure 4 This is a three-dimensional structural diagram of the expanding block, reinforcing rib, and guide needle of this utility model.
[0019] Figure 5 This is a three-dimensional structural diagram of the components of this utility model, including the fixing plate, the guide pin, and the first spring.
[0020] Figure 6 This is a three-dimensional structural diagram of the expanding block and the guide needle of this utility model.
[0021] Figure 7 This is a three-dimensional structural diagram of the handwheel, locking block, and positioning pin components of this utility model.
[0022] Figure 8 This is a three-dimensional structural diagram of the components of this utility model, including the slide rod, the second spring, and the abutment ring.
[0023] The markings in the diagram are as follows: 1-Pressing machine body, 2-Pressing head, 3-Mounting base, 4-Fixing plate, 5-Expanding block, 6-Strengthening rib, 7-Guide pin, 8-First spring, 9-Guide block, 10-Connecting block, 11-Screw, 12-Handwheel, 13-Clamping block, 14-Positioning pin, 15-Sleeve, 16-Slide rod, 17-Second spring, 18-Abutment ring. Detailed Implementation
[0024] Example: A metal parts rounding and finishing device, such as... Figures 1-8As shown, the press includes a press body 1, a punch head 2, a mounting base 3, a fixing plate 4, expanding blocks 5, reinforcing ribs 6, a guide pin 7, and a first spring 8. The punch head 2 is located on the upper front side of the press body 1. The mounting bases 3 are symmetrically connected to the lower part of the press body 1 by welding. A fixing plate 4 is placed between two mounting bases 3. Four expanding blocks 5 are slidably connected in a circular array in the middle of the fixing plate 4. Reinforcing ribs 6 are connected between the lower outer surfaces of the four expanding blocks 5. A guide pin 7 is slidably placed between the four expanding blocks 5, located directly below the punch head 2. The top diameter of the guide pin 7 is larger than its bottom diameter (e.g., ...). Figure 6 As shown), the inner sides of the four expanded round blocks 5 are all in contact with the outer side of the guide needle 7, and the guide needle 7 is connected to the fixing plate 4 by a first spring 8.
[0025] like Figure 1 and Figure 7 As shown, it also includes guide blocks 9, connecting blocks 10, screws 11, handwheels 12, locking blocks 13, and positioning pins 14. The top front and rear sides of the two mounting bases 3 are connected to the guide blocks 9 by welding. The two guide blocks 9 on the same side are symmetrically distributed. Each guide block 9 has a limit groove on one side. The two guide blocks 9 on the same side are connected to the connecting blocks 10 by welding. The top side of each connecting block 10 is rotatably connected to the screw 11. The top side of each screw 11 is connected to the handwheel 12 by welding. Each screw 11 is threadedly connected to the locking block 13. Each locking block 13 slides in the corresponding two limit grooves. The fixed plate 4 has four locking grooves on the left and right sides. The bottom sides of the two locking blocks 13 are connected to four positioning pins 14 by welding. Each positioning pin 14 is locked into the corresponding locking groove.
[0026] like Figure 8 As shown, it also includes a sleeve 15, a sliding rod 16, a second spring 17, and an abutment ring 18. Two sleeves 15 are installed on the front and rear sides of the fixing plate 4 by screws. Each sleeve 15 is slidably connected to a sliding rod 16. Each sliding rod 16 is connected to the corresponding sleeve 15 by a second spring 17. The top sides of the four sliding rods 16 are connected to the abutment ring 18 by welding. The four expanding blocks 5 are located at the center of the abutment ring 18.
[0027] When using this device, if it is necessary to replace the fixing plate 4 of the expanding blocks 5 with different specifications, the operator first turns the handwheel 12, which drives the locking block 13 and the positioning pin 14 upward through the screw 11, so that they disengage from the locking groove on the fixing plate 4. Then, the fixing plate 4 and its components can be horizontally pulled out between the two mounting seats 3. After replacing the new components, push them between the mounting seats 3, turn the handwheel 12 in the opposite direction, so that the positioning pin 14 re-engages into the locking groove to complete the fixing. Place the parts steadily on the abutment ring 18, and align the round hole to be repaired with the four expanding blocks 5 and the guide pin 7 in the center.
[0028] After the part is clamped, the press body 1 is started, and the punch head 2 on it begins to move downward. The punch head 2 first contacts and presses down on the guide pin 7. Since the top diameter of the guide pin 7 is larger than the bottom diameter, and its outer surface is in close contact with the inner surface of the four expanding blocks 5, the expanding blocks 5 expand outward under the action of the outer surface of the guide pin 7, squeezing the inner wall of the part. Therefore, the downward movement of the guide pin 7 will use its conical surface to evenly expand the four expanding blocks 5 outward radially. The outwardly expanding outer wall of the expanding blocks 5 then exerts a strong squeezing effect on the inner wall of the circular hole of the part. At this time, the reinforcing rib 6 and the first spring 8 deform, and the pressure can instantly flatten the burrs on the inner wall generated by the stamping, and through a small amount of plastic deformation, the hole diameter is precisely enlarged to the predetermined size.
[0029] After the hole enlargement and finishing are completed, the punch head 2 retracts upward under the drive of the punch press body 1. At this time, the restoring force connected to the guide pin 7 and the first spring 8 is released, pushing the guide pin 7 to reset upward. As the guide pin 7 rises, the radial constraint force of its conical surface on the enlargement block 5 decreases, and the four enlargement blocks 5 contract inward under the elastic action of the reinforcing rib 6, returning to the initial closed state, thereby disengaging from the inner wall of the machined part.
[0030] Furthermore, during the pressing process, the part contacts the abutment ring 18 and is squeezed downwards. At this time, the slide rod 16 moves downwards, and the second spring 17 is compressed and deformed. The sleeve 15, the second spring 17, and the slide rod 16 form a damping structure, which plays a role in shock absorption and buffering. Simultaneously, when the punch head 2 moves upwards, the abutment ring 18, under the action of the second spring 17 returning to its original position, pushes the part upwards. At this time, the operator can easily remove the finished part from the device. When it is necessary to process different models of parts, the fixing plate 4 with the corresponding specification rounding block 5 can be quickly replaced through the above-mentioned handwheel 12 and locking block 13 mechanism, which greatly improves the flexibility and production efficiency of the equipment.
Claims
1. A metal parts rounding and finishing processing device, characterized in that: The press includes a press body (1), a press head (2), a mounting base (3), a fixing plate (4), an expanding block (5), a reinforcing rib (6), a guide pin (7), and a first spring (8). The press body (1) is equipped with a press head (2) on the upper part. The press body (1) is symmetrically fixedly connected to the lower part of the press body (1). A fixing plate (4) is placed between the two mounting bases (3). Multiple expanding blocks (5) are slidably connected in a ring array in the middle of the fixing plate (4). A reinforcing rib (6) is connected between the lower outer sides of the multiple expanding blocks (5). A guide pin (7) is slidably placed between the multiple expanding blocks (5). The top diameter of the guide pin (7) is larger than the bottom diameter. The inner sides of the multiple expanding blocks (5) are all attached to the outer side of the guide pin (7). A first spring (8) is connected between the guide pin (7) and the fixing plate (4).
2. The metal part rounding and finishing device according to claim 1, characterized in that: It also includes guide blocks (9), connecting blocks (10), screws (11), handwheels (12), locking blocks (13) and positioning pins (14). Guide blocks (9) are fixedly connected to the top sides of the two mounting bases (3). Each guide block (9) has a limit groove on one side. Connecting blocks (10) are fixedly connected between the two guide blocks (9) on the same side. Each connecting block (10) has a screw (11) rotatably connected to the top. Each screw (11) has a handwheel (12) fixedly connected to the top. Each screw (11) has a locking block (13) threadedly connected to it. Each locking block (13) slides inside the corresponding two limit grooves. Four locking grooves are opened on both sides of the fixing plate (4). Four positioning pins (14) are fixedly connected to the bottom of the two locking blocks (13). Each positioning pin (14) is locked into the corresponding locking groove.
3. The metal part rounding and finishing device according to claim 2, characterized in that: The two guide blocks (9) on the same side are symmetrically distributed.
4. The metal part rounding and finishing device according to claim 3, characterized in that: It also includes a sleeve (15), a slide rod (16), a second spring (17) and an abutment ring (18). Two sleeves (15) are fixedly connected to both sides of the fixing plate (4). A slide rod (16) is slidably connected inside each sleeve (15). A second spring (17) is connected between each slide rod (16) and the corresponding sleeve (15). An abutment ring (18) is fixedly connected between the tops of the four slide rods (16).
5. A metal parts rounding and finishing device according to claim 4, characterized in that: Multiple expanding blocks (5) are located at the center of the abutment ring (18).
6. The metal part rounding and finishing device according to claim 5, characterized in that: The guide needle (7) is located below the stamping head (2).