Cylindrical steel center line scribing positioning tool

Abstract

The utility model relates to the field of die steel processing auxiliary tool, especially a cylindrical steel center line scribing positioning tool, including the screw rod, the both sides of screw rod surface are equipped with the reverse screw thread and the positive screw thread respectively, the both ends of screw rod are all screw thread connection have the movable seat, the both sides of screw rod are installed with the guide rod, the guide rod one end is connected with one movable seat, the other end penetrates another movable seat and is the sliding connection, through the screw rod with symmetrical connecting rod ensure that the fixed ring is always accurate in cylindrical steel center line, avoid artificial error, reduce the loss and delay, the rocker adjustment cooperation guide structure can be flexible adaptation different diameter cylindrical steel, and the operation is efficient, is suitable for small and medium-sized enterprises, the arc wear -resisting block provides stable support, and the elastic rubber piece is steady clamping marker pen, guarantees the scribing stable accurate, the whole structure is simple, need not complex electric control, low in cost, easy maintenance, convenient for popularization, can effectively promote the cylindrical steel processing efficiency and quality.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary tools for mold steel processing, specifically a tool for marking and positioning the center line of cylindrical steel. Background Technology

[0002] In the machining process of cylindrical mold steel, centerline marking and positioning are prerequisites for ensuring the accuracy of subsequent grinding, drilling, and heat treatment processes. A precise centerline provides a clear reference for the machining equipment, ensuring uniform and symmetrical cutting and grinding of the cylindrical steel in each process, and preventing material scrap or mold performance degradation due to positioning deviations. Especially for precision mold parts with micron-level accuracy requirements, even slight deviations in the centerline can cause fatal quality defects, directly affecting mold production efficiency. However, the centerline marking of cylindrical steel currently faces many challenges. Traditional marking methods mainly rely on manual use of tools such as rulers and calipers. This method is not only labor-intensive and inefficient, but also highly susceptible to the influence of operator skill level, experience, and visual errors, making it difficult to guarantee marking accuracy. Particularly for cylindrical steel with large diameters or long lengths, it is difficult to maintain accuracy throughout the manual marking process, often resulting in centerline deviations, which in turn affect subsequent machining and use. Summary of the Invention

[0003] The main purpose of this utility model is to solve the above-mentioned existing technical problems and provide a cylindrical steel center line marking and positioning tool.

[0004] The specific solution of this utility model is as follows: a cylindrical steel centerline marking and positioning tool, including a lead screw, with reverse threads and forward threads respectively on both sides of the lead screw surface, and movable seats threaded to both ends of the lead screw. Guide rods are installed on both sides of the lead screw, with one end of the guide rod connected to one of the movable seats and the other end passing through the other movable seat and being slidably connected; a first connecting rod is rotatably mounted on the top of one of the movable seats, and a fixing ring is installed on the other end of the first connecting rod; a second connecting rod is rotatably mounted on the top of the other movable seat, and the other end of the second connecting rod is connected to the fixing ring; the first connecting rod and the second connecting rod are of equal length and symmetrically distributed with the axis of the lead screw, so that the fixing ring is always located at the centerline position of the lead screw; a marker pen is detachably mounted on the fixing ring, and an auxiliary walking structure is installed at the bottom of the two movable seats.

[0005] According to the above technical solution, the movable seat is driven to move synchronously by the positive and negative threads of the lead screw, and the fixed ring is always kept in the center line position by the equal-length symmetrical connecting rod. Combined with the auxiliary walking structure, it can realize accurate and convenient scribing of cylindrical steel of different diameters.

[0006] Furthermore, the fixing ring is circular in shape, with an arc-shaped washer adhered to the inner wall of the fixing ring, and a bolt threaded to one end of the fixing ring. A clamping block is rotatably connected to the end of the bolt. When the bolt moves, the clamping block moves closer to the arc-shaped washer, and the clamping block is used to hold the marker pen.

[0007] According to the above technical solution, by using bolts to drive the clamping block and the arc-shaped washer, different sizes of marker pens can be firmly clamped, ensuring the positioning stability and reliability of the marker pens during the drawing process.

[0008] Furthermore, the auxiliary walking structure includes a fixed rod that is vertically fixed to the bottom of the movable seat, and a wear-resistant block is installed at the bottom of the fixed rod. The wear-resistant block has an arc-shaped structure with the arc facing inward.

[0009] According to the above technical solution, the arc-shaped wear-resistant block in the auxiliary walking structure faces inward and can fit against the surface of the cylindrical steel, which not only provides stable support for the tool, but also reduces wear during movement and ensures a smooth and stable marking process.

[0010] Furthermore, one of the movable seats is provided with a guide groove, and one end of the guide rod passes through the guide groove and is slidably connected to it.

[0011] According to the above technical solution, by sliding the guide groove and the guide rod, the movement trajectory of the movable seat can be restricted, preventing it from deviating as the lead screw rotates, and ensuring the smooth movement of the movable seat to guarantee positioning accuracy.

[0012] Furthermore, the two ends of the lead screw pass through two movable seats and are threaded together, and one end of the lead screw is connected to a rocker arm.

[0013] According to the above technical solution, by connecting the two ends of the lead screw to the movable seats with threads and driving them with a rocker arm at one end, the two movable seats can be easily controlled to move synchronously in opposite directions, thus achieving rapid adaptation and adjustment for cylindrical steel of different diameters.

[0014] Furthermore, both the arc-shaped gasket and the clamping block are made of elastic rubber.

[0015] According to the above technical solution, the use of elastic rubber material for the arc-shaped pad and clamp can provide cushioning protection when clamping the marker, while enhancing the fit with the marker, ensuring a firm clamping and preventing damage to the marker.

[0016] Compared with the prior art, this utility model has the following advantages: The cylindrical steel centerline marking and positioning tool uses a lead screw to drive the movable seat to move synchronously in opposite directions. Combined with a symmetrical connecting rod structure of equal length, it ensures that the fixed ring is always accurately positioned at the centerline of the cylindrical steel, fundamentally avoiding the error problems of manual marking. This provides a reliable benchmark for subsequent processing and assembly, reducing material waste and project delays. The distance between the movable seats can be adjusted by rotating the rocker arm. Combined with the cooperation of the guide rod and guide groove, it can flexibly adapt to cylindrical steel of different diameters without complex adjustments, significantly improving operational efficiency. It is especially suitable for multi-specification processing scenarios in small and medium-sized enterprises. The arc-shaped wear-resistant block at the bottom of the movable seat can closely fit the surface of the cylindrical steel, providing stable support and reducing wear. The fixed ring uses elastic rubber pads and clamping blocks to firmly hold different markers, preventing slippage or damage and ensuring smooth and accurate marking. At the same time, the entire device is composed of basic components, requiring no complex electrical control components. It is simple to manufacture and maintain, low in cost, and easy to apply in various industries, effectively improving the overall efficiency and quality of cylindrical steel processing. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2 yes Figure 1 Top view;

[0019] Figure 3 yes Figure 1 Sectional view at point AA;

[0020] Figure 4 yes Figure 2 Enlarged view of point B;

[0021] In the diagram: 1. Lead screw; 2. Reverse thread; 3. Positive thread; 4. Movable seat; 5. Guide rod; 6. First connecting rod; 7. Fixing ring; 8. Second connecting rod; 9. Marker pen; 10. Arc-shaped washer; 11. Bolt; 12. Clamping block; 13. Fixing rod; 14. Wear-resistant block; 15. Guide groove; 16. Rocker arm. Detailed Implementation

[0022] See Figure 1-4This embodiment is a cylindrical steel centerline marking and positioning tool, including a lead screw 1. The two sides of the lead screw 1 are respectively provided with reverse threads 2 and positive threads 3. Both ends of the lead screw 1 are threadedly connected to movable seats 4. A guide rod 5 is installed on each side of the lead screw 1. One end of the guide rod 5 is fixedly connected to one of the movable seats 4, and the other end passes through the other movable seat 4 and is slidably connected. A first connecting rod 6 is rotatably installed on the top of one of the movable seats 4. A fixing ring 7 is welded to the other end of the first connecting rod 6. A second connecting rod 8 is rotatably installed on the top of the other movable seat 4. The other end of the second connecting rod 8 is fixedly connected to the fixing ring 7. The lengths of the first connecting rod 6 and the second connecting rod 8 are equal and symmetrically distributed with the axis of the lead screw 1, so that the fixing ring 7 is always at the centerline position of the lead screw 1. A marker pen 9 is detachably installed on the fixing ring 7. An auxiliary walking structure is installed at the bottom of the two movable seats 4.

[0023] Furthermore, the fixing ring 7 is circular, and an arc-shaped washer 10 is adhered to the inner wall of the fixing ring 7. One end of the fixing ring 7 is threaded with a bolt 11, and the end of the bolt 11 is rotatably connected to a clamping block 12. When the bolt 11 moves, the clamping block 12 moves closer to the arc-shaped washer 10, and the clamping block 12 clamps the marker pen 9.

[0024] Furthermore, the auxiliary walking structure includes a fixed rod 13 vertically fixed to the bottom of the movable seat 4, and a wear-resistant block 14 is installed at the bottom of the fixed rod 13. The wear-resistant block 14 has an arc-shaped structure and the arc opening faces inward.

[0025] Furthermore, one of the movable seats 4 is provided with a guide groove 15, and one end of the guide rod 5 passes through the guide groove 15 and is slidably connected to it.

[0026] Furthermore, the two ends of the lead screw 1 pass through two movable seats 4 and are threaded together, and one end of the lead screw 1 is connected to a rocker arm 16.

[0027] Furthermore, both the arc-shaped gasket 10 and the clamping block 12 are made of elastic rubber.

[0028] The working principle of this embodiment is as follows: When operating the cylindrical steel centerline marking and positioning tool, first place the cylindrical steel stably on the operating platform to prevent it from rolling or shifting. Then rotate the rocker arm 16 at the end of the lead screw 1. With the positive and negative threads 2 on both sides of the lead screw 1, the two movable seats 4 will slide synchronously in opposite directions along the guide rod 5 (passing through the guide groove 15 of the movable seat 4) until the arc-shaped wear-resistant block 14 of the auxiliary walking structure at the bottom of the movable seat 4 fits against the outer surface of the cylindrical steel, thus completing the tool positioning. Then install the marker pen 9: put the marker pen 9 into the fixing ring 7, adjust the pen tip to align with the starting point of the line, rotate the bolt 11 on the fixing ring 7 to move the clamping block 12 toward the arc-shaped washer 10, and use the elastic rubber material of both to clamp the marker pen 9, which is both firmly fixed and does not damage the pen body. Next, push the tool to move at a constant speed along the axis of the cylindrical steel. Since the lengths of the first and second connecting rods are equal and symmetrical about the axis of the lead screw 1, the fixing ring 7 is always at the center line position of the cylindrical steel, and the marker pen 9 will draw a continuous straight center line. After the line is drawn, rotate the bolt 11 in the opposite direction to loosen the clamping block 12 and take out the marker pen 9. Then rotate the rocker arm 16 in the opposite direction to separate the movable seat 4. Finally, remove the tool.

Claims

1. A tool for marking and positioning the center line of a cylindrical steel column, characterized in that: The system includes a lead screw with reverse and forward threads on both sides of its surface. Both ends of the lead screw are threaded to movable seats. Guide rods are mounted on both sides of the lead screw, with one end connected to one of the movable seats and the other end passing through the other movable seat in a sliding connection. A first connecting rod is rotatably mounted on the top of one of the movable seats, with a fixing ring mounted on the other end. A second connecting rod is rotatably mounted on the top of the other movable seat, with the other end connected to the fixing ring. The first and second connecting rods are of equal length and symmetrically distributed with respect to the axis of the lead screw, ensuring that the fixing ring is always positioned at the center line of the lead screw. A marker pen is detachably mounted on the fixing ring. An auxiliary walking structure is mounted on the bottom of both movable seats.

2. The cylindrical steel centerline marking and positioning tool according to claim 1, characterized in that: The fixing ring is circular in shape, and an arc-shaped washer is glued to the inner wall of the fixing ring. A bolt is threaded to one end of the fixing ring, and a clamping block is rotatably connected to the end of the bolt. When the bolt moves, the clamping block moves closer to the arc-shaped washer, and the clamping block is used to hold the marker pen.

3. The cylindrical steel centerline marking and positioning tool according to claim 1, characterized in that: The auxiliary walking structure includes a fixed rod that is vertically fixed to the bottom of the movable seat. A wear-resistant block is installed at the bottom of the fixed rod. The wear-resistant block has an arc-shaped structure with the arc facing inward.

4. The cylindrical steel centerline marking and positioning tool according to claim 1, characterized in that: One of the movable seats is provided with a guide groove, and one end of the guide rod passes through the guide groove and is slidably connected to it.

5. A cylindrical steel centerline marking and positioning tool according to claim 1, characterized in that: The lead screw passes through two movable seats at both ends and is threaded together, and a rocker arm is connected to one end of the lead screw.

6. A cylindrical steel centerline marking and positioning tool according to claim 2, characterized in that: Both the curved gasket and the clamping block are made of elastic rubber.

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