A method for processing a ball screw with an outer ball

Abstract

The application discloses a ball screw machining method of external ball, comprising the following steps: fixing the screw nut at a specified position; inserting the dummy shaft into one end of the screw nut; putting the ball into the preset hole position on the side of the screw nut, and the ball flows into the spiral groove gap between the dummy shaft and the screw nut through the preset hole position; rotating the dummy shaft until the spiral groove gap between the dummy shaft and the screw nut is filled with the ball, stopping rotating the dummy shaft, and blocking the preset hole position; screwing the screw into one end of the dummy shaft, and the screw pushes out the dummy shaft to complete the installation. The application uses the "dummy shaft + preset hole position on the side" to construct a perfect temporary raceway mold cavity, and decomposes the "fine positioning and embedding" process with high requirements for manual work and screw in the traditional method into two steps of "quick ball filling on the dummy shaft" and "screw nondestructive replacement of the dummy shaft", which are low in difficulty and high in reliability. The application not only realizes a leap in efficiency and quality, but also completely changes the production mode of the ball screw pair through the modularization thought.

Description

Technical Field

[0001] This invention relates to the field of ball screw processing technology, and in particular to a method for processing ball screws with externally mounted balls. Background Technology

[0002] Ball screws, as precision transmission components, are widely used in CNC machine tools, automation equipment, aerospace, and robotics. The ball circulation system inside the core component—the ball nut—has a decisive impact on transmission accuracy, operational smoothness, and service life.

[0003] In the manufacturing, repair, and reassembly of ball screws, ball installation is a critical and challenging process. The conventional method involves using tweezers or needle-like tools to pick up each ball individually and insert it into the helical groove through the nut end face. This requires a high degree of concentration from the operator, as installing a single ball is time-consuming and prone to failure due to hand tremors or visual fatigue, leading to balls falling out, being missed, or becoming misaligned. This is especially true for small-diameter or densely circulated ball screws, where the installation failure rate is particularly high. Summary of the Invention

[0004] According to an embodiment of the present invention, a method for machining a ball screw with externally mounted balls is provided, comprising the following steps: Secure the lead screw nut to the designated position; Insert the dummy shaft into one end of the lead screw nut; Ball bearings are placed in the preset holes around the lead screw nut, and the ball bearings flow into the spiral groove gap between the dummy shaft and the lead screw nut through the preset holes; Rotate the dummy shaft until the helical groove between the dummy shaft and the lead screw nut is filled with balls, then stop rotating the dummy shaft and seal the preset hole. Screw the lead screw into one end of the dummy shaft. The lead screw will push the dummy shaft out, completing the installation.

[0005] Furthermore, the preset holes on the periphery of the lead screw nut are holes drilled on the circulator of the lead screw nut.

[0006] Furthermore, the preset hole positions on the periphery of the lead screw nut are holes drilled in non-stressed areas on the periphery of the lead screw nut.

[0007] Furthermore, the preset holes on the periphery of the lead screw nut are the holes for installing the circulator on the lead screw nut.

[0008] Furthermore, before loading the ball, a ball loading block is installed on a preset hole on the side of the lead screw nut. The bottom of the ball loading block is inserted into the preset hole on the side of the lead screw nut. The ball loading block is provided with a ball loading channel. The bottom of the ball loading channel is connected to the preset hole. A ball is placed on the top of the ball loading channel. The ball will rely on its own weight to flow through the ball loading channel and into the spiral groove gap between the dummy shaft and the lead screw nut through the preset hole.

[0009] Furthermore, the bead-loading channel is inclinedly set on the bead-loading block.

[0010] Furthermore, the top of the bead-filling block is provided with a conical groove, which is connected to the top of the bead-filling channel.

[0011] Furthermore, the bead-loading channel is vertically positioned on the bead-loading block.

[0012] A method for processing ball screws with externally mounted balls according to an embodiment of the present invention has the following beneficial effects: 1. The balls are filled by gravity from the side hole, and the dummy shaft can be rotated to fill the ball in one step, eliminating the slow action of filling one ball at a time.

[0013] 2. The dummy shaft simulates operation, allowing the balls to be naturally squeezed and evenly distributed, ensuring fullness and preload, and preventing omissions or misalignments.

[0014] 3. All assembly friction is borne by a cheap dummy shaft. Finally, the lead screw is screwed into and the dummy shaft is ejected, and the balls are smoothly transferred without damaging the lead screw raceway.

[0015] 4. Nuts, balls, and dummy shafts can be assembled into an independent module in advance, so there is no fear of losing balls during storage and transportation. During final assembly, the screw is simply screwed in and pushed out like a screw. After-sales nut replacement is also very convenient.

[0016] 5. When used with a funnel-shaped bead-filling block, it can be directly connected to a vibrating feeder to quickly achieve automated production lines.

[0017] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0018] Figure 1 This is a flowchart of a ball screw manufacturing method with externally mounted balls according to an embodiment of the present invention.

[0019] Figure 2 This is a structural diagram of the ball bearing block in the first method of processing a ball screw with externally mounted balls according to an embodiment of the present invention.

[0020] Figure 3 This is a structural diagram of the ball bearing block in the second method of processing a ball screw with externally mounted balls according to an embodiment of the present invention. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0022] First, combine Figures 1-3 This invention describes a method for machining an externally mounted ball screw according to an embodiment of the present invention, used for mounting the balls 300 on a ball screw 300, and has a wide range of applications.

[0023] like Figures 1-3 As shown, an embodiment of the present invention provides a method for processing a ball screw with externally mounted balls, comprising the following steps: like Figure 1 As shown, in step S1, the lead screw nut 200 is fixed in the designated position. It should be noted that the lead screw nut 200 can be fixed horizontally.

[0024] like Figure 1 As shown, in S2, the dummy shaft is inserted into one end of the lead screw nut 200.

[0025] like Figure 1 As shown, in S3, a ball bearing 300 is placed in a preset hole 201 on the periphery of the lead screw nut 200, and the ball bearing 300 flows into the spiral groove gap between the dummy shaft and the lead screw nut 200 through the preset hole 201.

[0026] like Figure 1 As shown, in S4, rotate the dummy shaft until the helical groove between the dummy shaft and the lead screw nut 200 is filled with the balls 300, then stop rotating the dummy shaft and seal the preset hole 201.

[0027] like Figure 1 As shown, in S5, the screw is screwed into the dummy shaft from one end, and the screw pushes the dummy shaft out, completing the installation.

[0028] Furthermore, in this embodiment, the preset hole position 201 on the periphery of the lead screw nut 200 is a hole opened on the circulator of the lead screw nut 200, that is, by opening a hole on the circulator, it serves as an insertion hole for the ball bearing 300.

[0029] Furthermore, in this embodiment, the preset hole position 201 on the periphery of the lead screw nut 200 is a hole made in a non-stressed area on the periphery of the lead screw nut 200, that is, by making a hole in a non-stressed area on the periphery of the lead screw nut 200, it serves as an insertion hole for the ball 300.

[0030] Furthermore, in this embodiment, the preset hole position 201 on the periphery of the lead screw nut 200 is the hole position for installing the circulator on the lead screw nut 200. That is, the hole position for installing the circulator on the lead screw nut 200 is used as the insertion hole. In order to facilitate the insertion of the ball bearings 300 one by one, a contour block can be installed on the hole position for installing the circulator on the lead screw nut 200. By making holes in the contour block, the ball bearings 300 can be inserted one by one.

[0031] Furthermore, such as Figures 2-3As shown, in this embodiment, before loading the ball, a ball loading block 100 is installed on a preset hole 201 on the periphery of the lead screw nut 200. The bottom of the ball loading block 100 is inserted into the preset hole 201 on the periphery of the lead screw nut 200. The ball loading block 100 is provided with a ball loading channel 101. The bottom of the ball loading channel 101 is connected to the preset hole 201. A ball 300 is placed on the top of the ball loading channel 101. The ball 300 will rely on its own weight to flow through the ball loading channel 101 and into the spiral groove gap between the dummy shaft and the lead screw nut 200 through the preset hole 201.

[0032] Furthermore, such as Figure 2 As shown, in this embodiment, the bead loading channel 101 is inclinedly disposed on the bead loading block 100.

[0033] Furthermore, such as Figures 2-3 As shown, in this embodiment, the top of the bead-loading block 100 is provided with a conical groove 102, which is connected to the top of the bead-loading channel 101. In this way, when loading beads, the steel ball only needs to be placed in the conical groove 102, and the steel ball will automatically fall into the bead-loading channel 101 due to its own weight and the inclination of the conical groove 102.

[0034] Furthermore, such as Figure 3 As shown, in this embodiment, the bead loading channel 101 is vertically arranged on the bead loading block 100.

[0035] Above, refer to Figures 1-3 A method for manufacturing a ball screw with externally mounted balls according to an embodiment of the present invention is described, which has the following beneficial effects: 1. The 300 ball bearings are filled by gravity from the side hole, and the dummy shaft can be rotated to fill the gap in one step, eliminating the slow action of filling one ball at a time.

[0036] 2. The dummy shaft simulates operation, allowing the 300 balls to be naturally squeezed and evenly arranged, ensuring fullness and preload, and preventing omissions or misalignments.

[0037] 3. All assembly friction is borne by a cheap dummy shaft. Finally, the lead screw is screwed in and the dummy shaft is ejected, and the balls are smoothly transferred at 300 degrees without damaging the lead screw raceway.

[0038] 4. The nut, ball bearing 300 and dummy shaft can be assembled into an independent module in advance, so there is no fear of the ball bearing falling off during storage and transportation. During final assembly, the screw rod can be screwed in and pushed out like tightening a screw. After-sales nut replacement is also very convenient.

[0039] 5. When used with the funnel-type bead-filling block 100, it can be directly connected to the vibrating feeder to quickly realize an automated production line.

[0040] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A method for processing a ball screw with externally mounted balls, characterized in that, It includes the following steps: Secure the lead screw nut to the designated position; Insert the dummy shaft into one end of the lead screw nut; Ball bearings are inserted into preset holes on the periphery of the lead screw nut, and the ball bearings flow into the spiral groove gap between the dummy shaft and the lead screw nut through the preset holes; Rotate the dummy shaft until the helical groove between the dummy shaft and the lead screw nut is filled with balls, then stop rotating the dummy shaft and seal the preset hole. Screw the lead screw into one end of the dummy shaft. The lead screw will push the dummy shaft out, completing the installation.

2. The method for processing ball screws with externally mounted balls as described in claim 1, characterized in that, The preset holes on the periphery of the lead screw nut are holes drilled in the circulator of the lead screw nut.

3. The method for processing ball screws with externally mounted balls as described in claim 1, characterized in that, The preset holes on the periphery of the lead screw nut are holes drilled in non-stressed areas on the periphery of the lead screw nut.

4. The method for processing ball screws with externally mounted balls as described in claim 1, characterized in that, The preset holes on the periphery of the lead screw nut are the holes for installing the circulator on the lead screw nut.

5. The method for processing ball screws with externally mounted balls as described in claim 1, characterized in that, Before loading the ball, a ball loading block is installed in a preset hole on the periphery of the lead screw nut. The bottom of the ball loading block is inserted into the preset hole on the periphery of the lead screw nut. The ball loading block is provided with a ball loading channel. The bottom of the ball loading channel is connected to the preset hole. A ball is placed in the top of the ball loading channel. The ball will rely on its own weight to flow through the ball loading channel and into the spiral groove gap between the dummy shaft and the lead screw nut through the preset hole.

6. The method for processing ball screws with externally mounted balls as described in claim 5, characterized in that, The bead-loading channel is inclinedly arranged on the bead-loading block.

7. The method for processing ball screws with externally mounted balls as described in claim 5 or 6, characterized in that, The top of the bead-filling block is provided with a conical groove, which is connected to the top of the bead-filling channel.

8. The method for processing ball screws with externally mounted balls as described in claim 5, characterized in that, The bead-loading channel is vertically arranged on the bead-loading block.

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