An internal spline finishing device

Abstract

The utility model relates to the inner spline repair technical field, concretely is a kind of inner spline fine finishing device, including workpiece placing seat, the workpiece placing seat is used to place workpiece, the workpiece placing seat can be slidably arranged, the one side of workpiece placing seat is provided with grinding assembly, and the grinding assembly includes main shaft, and the one side of main shaft is connected with power mechanism and the other side is provided with grinding head;The power mechanism includes servo motor, and the servo motor is connected with connecting piece by eccentric shaft, and the connecting piece is hingedly connected in the one side of main shaft.The inner spline fine finishing device of the utility model is used to carry out inner spline repair to the unqualified workpiece after heat treatment, to restore the size accuracy and form tolerance of inner spline, improve product pass rate, reduce processing cost.The overall structure is simple, easy to operate, and low in manufacturing cost, and has high practicality.

Description

Technical Field

[0001] This utility model relates to the field of internal spline repair technology, and in particular to an internal spline fine repair device. Background Technology

[0002] In the field of mechanical manufacturing, the diversification of workpiece structures and the increasing demand for high precision are constantly rising. Among them, workpieces with internal splines play a crucial role in many mechanical transmission systems. As an important component that works with external splines to achieve power transmission and motion guidance, the machining accuracy and quality of internal splines directly affect the performance and reliability of the entire mechanical system.

[0003] Currently, the machining of internal splines on workpieces is typically performed using specialized equipment. During the machining process, by precisely controlling the tool's movement trajectory and cutting parameters, the dimensions and geometric tolerances of the machined internal splines can be ensured to meet design requirements, resulting in a qualified product after inspection. At this stage, the specialized equipment, with its high-precision and high-stability machining capabilities, provides a reliable guarantee for the initial forming of the internal splines.

[0004] However, in actual production processes, subsequent heat treatment becomes a key factor affecting the quality of internal splines. After the internal spline machining is completed, the workpiece often requires overall heat treatment to improve its internal structure and enhance the material's mechanical properties, such as hardness, strength, and toughness, thereby meeting the usage requirements under different working conditions. However, during heat treatment, the workpiece undergoes complex physical and chemical changes, leading to shrinkage deformation in the internal spline area. This deformation alters the dimensions of the originally qualified internal splines, exceeding the design tolerance range, and resulting in them being deemed unqualified during subsequent spline inspection. Unqualified internal splines can cause the mating external splines to fail to assemble properly, or to exhibit jamming, abnormal noise, or other phenomena during operation, severely affecting the smoothness and accuracy of mechanical transmission, reducing the overall performance and service life of the product. Due to the failure of spline inspection, the workpiece pass rate is greatly reduced, and a large number of workpieces become scrap or require rework due to unqualified internal splines. This not only increases the waste of raw materials but also leads to extended production cycles, increased equipment occupancy time, and increased labor costs, significantly increasing processing costs and causing significant economic losses to the enterprise. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this utility model is to provide an internal spline finishing device. This device solves the problem that after the workpiece has undergone internal spline machining, overall heat treatment alters the dimensions of the originally qualified internal splines, causing them to exceed the design tolerance range. Consequently, the splines are deemed unqualified during subsequent spline inspections, resulting in a significant decrease in the workpiece qualification rate, waste of raw materials, and increased processing costs.

[0006] To achieve the above objectives, this utility model provides an internal spline finishing device, including a workpiece placement seat for placing workpieces. The workpiece placement seat is slidably disposed, and a grinding assembly is disposed on one side of the workpiece placement seat. The grinding assembly includes a spindle, a power mechanism is connected to one side of the spindle, and a grinding head is disposed on the other side. The power mechanism includes a servo motor, and the servo motor is connected to a connector via an eccentric shaft. The connector is hinged to one side of the spindle.

[0007] As a preferred technical solution, the spindle is slidably mounted on a support base, the support base is provided with a through hole, a bushing is provided in the through hole, and the spindle is located in the bushing.

[0008] As a preferred technical solution, the support base is provided with an oil cup, and the bottom of the oil cup is provided with an oil passage, which passes through the support base and the bushing.

[0009] As a preferred technical solution, the workpiece placement seat is provided with two symmetrically distributed V-shaped bases, and the workpiece to be refined is placed between the two V-shaped bases.

[0010] As a preferred technical solution, the bottom of the workpiece placement seat is provided with a sliding mechanism, the sliding mechanism including a matching guide rail and a guide rail slider, and the workpiece placement seat is mounted on the guide rail slider.

[0011] As a preferred technical solution, a signal block is provided on one side of the workpiece placement seat, and the signal block moves back and forth with the workpiece placement seat.

[0012] As a preferred technical solution, a sensing signal contact head is provided on one side of the signal block, and the sensing signal contact head is connected to an electrical control box via a wire. The electrical control box is also connected to a servo motor via a wire.

[0013] As a preferred technical solution, the grinding head is detachably mounted on the spindle.

[0014] This invention provides an internal spline repair device for repairing internal splines on workpieces that have failed heat treatment, thereby restoring the dimensional accuracy and form and position tolerances of the internal splines, improving product qualification rate, and reducing processing costs. The device has a simple overall structure, is easy to operate, has low manufacturing cost, and is highly practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal spline finishing device of this utility model; Figure 2 This is a schematic diagram of the internal spline finishing device of this utility model from another perspective. Figure 3 This is a side view of the internal spline finishing device of this utility model; Figure 4 for Figure 3 Sectional view at point AA; In the picture: 1-Workpiece placement seat, 11-V-type base, 2-Grinding assembly, 21-Spindle, 22-Grinding head, 23-Power mechanism, 231-Servo motor, 232-Eccentric shaft, 233-Connector, 234-Deep groove ball bearing, 24-Support seat, 25-Oil cup, 251-Oil passage, 26-Bushing, 31-Guide rail, 32-Guide rail slider, 4-Electrical control box, 5-Wire, 6-Workpiece, 7-Base, 8-Signal stop, 9-Induction signal contact head, 91-Bracket. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0017] Example 1:

[0018] See Figures 1-3 This utility model provides an internal spline finishing device, including a slidable workpiece placement seat 1. A grinding assembly 2 is provided on one side of the workpiece placement seat 1. The grinding assembly 2 includes a spindle 21, a power mechanism 23 connected to one side of the spindle 21, and a grinding head 22 provided on the other side. The grinding head 22 is detachably mounted on the spindle 21. When replacement is needed, it can be removed from the spindle 21 and replaced with a different model of grinding head 22, which greatly improves the grinding range of the internal spline finishing device.

[0019] The power mechanism 23 includes a servo motor 231, which is connected to a connector 233 via an eccentric shaft 232. The connector 233 is hinged to one side of the main shaft 21. The connector 233 has a built-in deep groove ball bearing 234, which rotates with the eccentric shaft 232.

[0020] The spindle 21 is slidably mounted on the support base 24. Further, the support base 24 has a through hole, and a bushing 26 is disposed within the through hole. The slidable spindle 21 is disposed within the bushing 26. During operation, the spindle 21 moves back and forth within the bushing 26. To reduce the friction between the bushing 26 and the support base 24 and improve the smoothness of the spindle 21's movement within the bushing 26, an oil cup 25 is provided on the support base 24. An oil passage 251 is provided at the bottom of the oil cup 25. The oil passage 251 passes through the support base 24 and the bushing 26, allowing lubricating oil to smoothly adhere to the spindle 21 via the oil passage 251. See [reference needed]. Figure 4The bottom of the oil cup 25 is provided with cotton yarn, which uses the principle of linear suction lubrication to deliver lubricating oil to the main shaft 21.

[0021] The workpiece placement seat 1 is provided with two symmetrically distributed V-shaped bases 11, and the workpiece 6 to be refined is placed between the two V-shaped bases 11.

[0022] The bottom of the workpiece placement seat 1 is provided with a sliding mechanism, which includes a matching guide rail 31 and a guide rail slider 32. The workpiece placement seat 1 is mounted on the guide rail slider 32 to realize the back-and-forth movement of the workpiece 6 placed on the workpiece placement seat 1.

[0023] A signal block 8 is provided on one side of the workpiece placement seat 1, and the signal block 8 moves back and forth with the workpiece placement seat 1. A sensing signal contact head 9 is provided on one side of the signal block 8, and the sensing signal contact head 9 is mounted on the bracket 91. The sensing signal contact head 9 is connected to the electrical control box 4 through the wire 5, and the electrical control box 4 is also connected to the servo motor 231 through the wire 5.

[0024] The workpiece placement seat 1, bracket 91, and support seat 24 are all mounted on the base 7, and the base 7 can be moved to facilitate the movement of the entire internal spline finishing device.

[0025] In practical applications, the operator places the end of the workpiece 6 that needs fine finishing facing the grinding assembly 2 and between the two V-shaped bases 11, holds the workpiece 6 by hand, and pushes the workpiece 6 to contact the grinding head 22, inserting the grinding head 22 into the internal spline of the workpiece 6 (if the grinding head 22 does not correspond to the internal spline of the workpiece 6, manually rotate the workpiece 6 until the grinding head 22 is smoothly inserted into the internal spline of the workpiece 6). When the grinding head 22 is inserted into the internal spline of the workpiece 6, the workpiece placement seat 1 moves the signal stop 8 to a position where it contacts the induction signal contact head 9. The induction signal contact head 9 senses that the grinding head 22 has been inserted into the internal spline of the workpiece 6 and transmits the signal to the electrical control box 4. The electrical control box 4 sends a start command to the servo motor 231, which drives the eccentric shaft 232 to rotate. This, in turn, causes the eccentric shaft 232 to drive the connecting piece 233 to rotate. The connecting piece 233 then drives the hinged spindle 21 to move left and right under the limit of the through hole in the support seat 24. Lubricating oil is delivered to the spindle 21 through the oil cup 25, reducing the friction between the spindle 21 and the bushing 26, making their contact smoother. Under the action of the eccentric shaft 232, the grinding head 22 at the end of the spindle 21 moves back and forth within the internal spline of the workpiece 6, correcting and repairing the deformed internal spline. After completing the fine finishing of the upper part of the internal spline through the above operations, the operator holds the workpiece 6 and pulls the workpiece placement seat 1 back to a position away from the grinding assembly 2. During the pull-back process, the induction signal contact head 9 and the signal stop block 8 gradually separate until they are completely out of contact. At this time, no signal is transmitted to the control box 4, so the control box 4 sends a stop command to the servo motor 231, and the servo motor 231 stops working. The operator rotates the workpiece 6, adjusts its placement, and repeats the above operations. Because the grinding head 22 is smaller than the internal spline diameter parameter of the workpiece 6 and has a gap, it cannot grind the internal spline when it is first inserted into the workpiece 6. It is necessary to manually rotate the workpiece 6 clockwise and counterclockwise in sequence to press the side of the internal spline onto the grinding head. Using the working principle of side centering of the internal spline, the repair is performed by simulating the assembly method. After removing the high point of deformation, the spline go / no-go gauge is qualified to ensure that the entire internal spline of the workpiece 6 is repaired evenly.

[0026] This invention provides an internal spline repair device for repairing internal splines on workpieces that have failed heat treatment, thereby restoring the dimensional accuracy and form and position tolerances of the internal splines, improving product qualification rate, and reducing processing costs. The device has a simple overall structure, is easy to operate, has low manufacturing cost, and is highly practical.

[0027] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. An internal spline finishing device, comprising a workpiece placement seat (1) for placing a workpiece (6), characterized in that, The workpiece placement seat (1) is slidably arranged, and a grinding assembly (2) is provided on one side of the workpiece placement seat (1). The grinding assembly (2) includes a spindle (21), a power mechanism (23) is connected to one side of the spindle (21), and a grinding head (22) is provided on the other side. The power mechanism (23) includes a servo motor (231), and the servo motor (231) is connected to a connector (233) through an eccentric shaft (232). The connector (233) is hinged to one side of the spindle (21).

2. The internal spline finishing device according to claim 1, characterized in that, The spindle (21) is slidably mounted on the support base (24), which has a through hole and a bushing (26) inside the through hole. The spindle (21) is located inside the bushing (26).

3. The internal spline finishing device according to claim 2, characterized in that, An oil cup (25) is provided on the support base (24), and an oil passage (251) is provided at the bottom of the oil cup (25). The oil passage (251) passes through the support base (24) and the bushing (26).

4. The internal spline finishing device according to claim 1, characterized in that, The workpiece placement seat (1) is provided with two symmetrically distributed V-shaped bases (11), and the workpiece (6) to be finely repaired is placed between the two V-shaped bases (11).

5. The internal spline finishing device according to claim 4, characterized in that, The bottom of the workpiece placement seat (1) is provided with a sliding mechanism, which includes a matching guide rail (31) and a guide rail slider (32). The workpiece placement seat (1) is mounted on the guide rail slider (32).

6. The internal spline finishing device according to claim 4, characterized in that, A signal block (8) is provided on one side of the workpiece placement seat (1), and the signal block (8) moves back and forth with the workpiece placement seat (1).

7. The internal spline finishing device according to claim 6, characterized in that, A sensing signal contact head (9) is provided on one side of the signal block (8). The sensing signal contact head (9) is connected to the electrical control box (4) via a wire (5). The electrical control box (4) is also connected to the servo motor (231) via a wire (5).

8. The internal spline finishing device according to claim 1, characterized in that, The grinding head (22) is detachably mounted on the spindle (21).

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