Hook shank thread turning tool

Abstract

The utility model discloses a kind of hook handle thread turning tool, including circular vertical plate, horizontal cross plate, hook positioning mechanism and hook clamping mechanism;Hook positioning mechanism includes locating pin, several support screws and hook neck support seat, locating pin is fixed on the middle part of horizontal cross plate, several support screws are respectively fixed on horizontal cross plate, hook neck support seat is fixed on the middle part of the outside of horizontal cross plate;Hook clamping mechanism includes first pressing plate, first compression bolt, second pressing plate, second compression bolt and support bolt, first pressing plate is compressed the middle part of hook hook portion, second pressing plate one end is supported on support bolt, and second pressing plate other end is compressed hook neck portion.The utility model is accurate in positioning, clamping is reliable, every time turning, hook can be automatically aligned positioning, without repeatedly aligning, such not only can reduce processing error, improve workpiece processing quality, but also can greatly save time, improve work efficiency, suitable for batch processing.

Description

Technical Field

[0001] This utility model relates to a hook turning fixture, and more particularly to a hook shank thread turning fixture, belonging to the field of tooling and fixture technology. Background Technology

[0002] Lifting hooks are one of the most commonly used lifting tools in lifting machinery, and their manufacturing quality directly affects their lifting strength. For example... Figure 1 As shown, the hook is a forged part, including a shank 10, a neck 20, and a hook portion 30. The threads on the hook shank are generally machined by turning. During turning, the hook is clamped on a horizontal lathe using a four-jaw chuck. However, clamping with a four-jaw chuck is cumbersome, time-consuming, labor-intensive, and involves high labor intensity. Furthermore, the positioning of the four-jaw chuck is inaccurate, alignment is complex, and the alignment error is large, leading to significant machining errors and severely affecting the workpiece's machining quality. Each workpiece requires realignment, resulting in long processing time, low work efficiency, and significantly increased processing costs, making it unsuitable for batch processing. In addition, due to the limited length of the four-jaw chuck, it cannot completely and reliably securely fix the hook portion, posing a certain safety hazard. Utility Model Content

[0003] The purpose of this invention is to provide a simple, easy-to-operate, and accurate and reliable tooling for threading hook shanks.

[0004] This utility model is achieved through the following technical solution:

[0005] A hook shank threading fixture includes a circular upright plate, a horizontal cross plate fixed to one side of the circular upright plate, a hook positioning mechanism, and a hook clamping mechanism. The hook positioning mechanism includes a positioning pin, several support screws, and a hook neck support. The positioning pin is fixedly supported on the middle of the horizontal cross plate, the several support screws are respectively fixed on the horizontal cross plate, and the bottom of the hook neck support is embedded and fixed on the outer middle of the horizontal cross plate. During hook positioning, the hook portion is sleeved on the positioning pin, and the bottom surface of the hook portion is supported on the several support screws. The hook is supported on the hook neck support seat, and the center line of the hook shank coincides with the axial center line of the circular vertical plate. The hook clamping mechanism includes a first pressure plate, a first clamping bolt, a second pressure plate, a second clamping bolt, and a support bolt. The first pressure plate clamps the middle part of the hook hook through the first clamping bolt and nut. The lower end of the first clamping bolt passes through the first pressure plate and the positioning pin and is fixed to the horizontal plate. The support bolt is vertically fixed to one end of the horizontal plate. One end of the second pressure plate is supported on the support bolt, and the other end of the second pressure plate clamps the hook neck through the second clamping bolt and nut.

[0006] The objective of this utility model can also be further achieved through the following technical measures.

[0007] The aforementioned hook shank thread turning fixture is provided with reinforcing ribs at the upper and lower ends of the circular vertical plate and the horizontal horizontal plate, respectively.

[0008] The aforementioned hook shank thread turning fixture, wherein the hook neck support includes a base plate, and a support with a concave arc groove extends upward from the middle of the outer side of the base plate, the radius of curvature of the concave arc groove matching the radius of curvature of the hook neck.

[0009] The aforementioned hook shank thread turning fixture, wherein the outer circular surface of the locating pin matches the inner arc surface of the hook portion; the plurality of support screws include a first support screw located on both sides of the hook portion and a second support screw located on the lower side of the hook's lower curved portion, the line YY connecting the axes of the two first support screws passes through the axis of the locating pin, and the line YY connecting the axes of the two first support screws is perpendicular to the line XX connecting the axis of the second support screw and the axis of the locating pin.

[0010] This utility model features a simple structure and convenient operation. It quickly and accurately positions the workpiece using a locating pin, several support screws, and a hook neck support. Simultaneously, the first and second pressure plates respectively clamp the hook and neck, ensuring a secure and reliable clamping. During each turning operation, the hook automatically aligns and positions itself, eliminating the need for repeated alignment. This not only reduces machining errors and improves workpiece quality but also significantly saves time and increases work efficiency, making it suitable for batch processing. By changing the locating pins and hook shank support of different specifications and sizes, it is possible to process threads on hook shanks of various sizes, thus having a wide range of applications.

[0011] The advantages and features of this utility model will be illustrated and explained through the following non-limiting description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the hook;

[0013] Figure 2 This is the front view of this utility model;

[0014] Figure 3 yes Figure 2 Top view;

[0015] Figure 4 yes Figure 2 The right view. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] like Figure 2 , Figure 3 and Figure 4As shown, this utility model includes a circular upright plate 1, a horizontal plate 2 welded and fixed to the right side of the circular upright plate 1, a hook positioning mechanism 3, and a hook clamping mechanism 4. Reinforcing ribs 5 are welded between the upper and lower ends of the circular upright plate 1 and the horizontal plate 2, ensuring a uniform mass distribution of the welded assembly of the circular upright plate 1, the horizontal plate 2, and the reinforcing ribs 5, reducing centrifugal force caused by imbalance, and making the entire device stable and reliable. The hook positioning mechanism 3 includes a positioning pin 31, three support screws 32, and a hook neck support seat 33. The positioning pin 31 is welded and supported on the middle of the horizontal plate 2. The outer circular surface of the positioning pin 31 matches the inner arc surface of the hook portion 30, ensuring faster and more accurate hook positioning. The three support screws 32 are screwed onto the horizontal plate 2, as shown... Figure 3 As shown, the three support screws 32 include a first support screw 321 located on both sides of the hook portion 30 and a second support screw 322 located on the lower side of the hook's lower curved portion. The line YY connecting the axes of the two first support screws 321 passes through the axis of the positioning pin 31, and the line YY connecting the axes of the two first support screws 321 is perpendicular to the line XX connecting the axis of the second support screw 322 and the axis of the positioning pin 31.

[0018] The bottom of the hook neck support 33 is embedded and fixed to the outer center of the horizontal plate 2 by fasteners. The hook neck support 33 includes a base plate 34, and a support 35 with a concave arc groove extends upward from the outer center of the base plate 34. The radius of curvature of the concave arc groove matches the radius of curvature of the hook neck. When the hook is positioned, the hook part 30 is sleeved on the positioning pin 31, and the bottom surface of the hook part 30 is supported by three support screws 32. The hook neck 20 is supported on the concave arc groove of the support 35. At this time, the center line of the hook shank coincides with the axial center line of the circular vertical plate. Because the hook surface is curved, the contact area between the hook and the horizontal plate 2 is small. To prevent excessive vibration of the hook during turning, the hook is supported by three support screws 32 on the horizontal plate 2, increasing the contact points between the hook and the horizontal plate 2 and making the hook clamping more stable.

[0019] The hook clamping mechanism 4 includes a first pressure plate 41, a first clamping bolt 42, a second pressure plate 43, a second clamping bolt 44, and a support bolt 45. The first pressure plate 41 is circular, clamping the middle of the hook portion 30 and locking it with the first clamping bolt 42 and a nut. The lower end of the first clamping bolt 42 passes through the first pressure plate 41 and the positioning pin 31 and screws onto the horizontal plate 2. The support bolt 45 is vertically screwed onto one end of the outer side of the horizontal plate 2. The second pressure plate 43 is rectangular, with one end supported on the support bolt 45 and the other end clamping the hook neck 20 and locking it with the second clamping bolt 44 and a nut. By clamping the circular vertical plate 1 with a four-jaw chuck of a horizontal lathe and simultaneously pressing the center of the end of the hook shank 10 with a center, the threads of the hook shank can be machined.

[0020] In addition to the above embodiments, the present invention may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A tooling for threading the shank of a hook, characterized in that: The system includes a circular upright plate, a horizontal plate fixed to one side of the circular upright plate, a hook positioning mechanism, and a hook clamping mechanism. The hook positioning mechanism includes a positioning pin, several support screws, and a hook neck support. The positioning pin is fixedly supported on the middle of the horizontal plate, the several support screws are respectively fixed to the horizontal plate, and the bottom of the hook neck support is embedded and fixed to the middle of the outer side of the horizontal plate. During hook positioning, the hook portion is sleeved on the positioning pin, the bottom surface of the hook portion is supported on the several support screws, and the hook neck is supported on the hook neck support. On the support, the center line of the hook handle coincides with the axial center line of the circular vertical plate; the hook clamping mechanism includes a first pressure plate, a first clamping bolt, a second pressure plate, a second clamping bolt, and a support bolt. The first pressure plate clamps the middle part of the hook hook through the first clamping bolt and a nut. The lower end of the first clamping bolt passes through the first pressure plate and the positioning pin and is fixed to the horizontal plate. The support bolt is vertically fixed to one end of the outer side of the horizontal plate. One end of the second pressure plate is supported on the support bolt, and the other end of the second pressure plate clamps the hook neck through the second clamping bolt and a nut.

2. The hook shank thread turning fixture as described in claim 1, characterized in that: The circular vertical plate and the horizontal horizontal plate are respectively provided with reinforcing ribs at their upper and lower ends.

3. The hook shank thread turning fixture as described in claim 1, characterized in that: The hook neck support includes a base plate, and a support with a concave arc groove extends upward from the middle of the outer side of the base plate. The radius of curvature of the concave arc groove matches the radius of curvature of the hook neck.

4. The hook shank thread turning fixture as described in claim 1, characterized in that: The outer circular surface of the positioning pin matches the inner arc surface of the hook portion; the plurality of support screws include a first support screw located on both sides of the hook portion and a second support screw located on the lower side of the hook's curved portion. The line YY connecting the axes of the two first support screws passes through the axis of the positioning pin, and the line YY connecting the axes of the two first support screws is perpendicular to the line XX connecting the axis of the second support screw and the axis of the positioning pin.

Images