A low melting point alloy filling and straightening device

Abstract

The present invention provides a low melting point alloy filling and straightening device, comprising: a molten pool, the molten pool comprising a heating element, a feed port and a discharge port, and a cooling device is arranged at one end of the molten pool close to the discharge port; a straightening device, the straightening device comprising at least one pair of straightening rollers, the discharge port being connected to the straightening rollers; a base, the molten pool and the straightening device being arranged on the base. The present invention utilizes the liquid-to-solid transformation of the low melting point alloy to fill the spiral groove of the lead screw, so that the lead screw becomes a smooth rod, and then straightens it. The whole device has a simple structure and is easy to operate. When the straightening lead screw is inserted into the feed port, the preparation, straightening and cleaning processes can be completed under the action of the driving device.

Description

Technical Field

[0001] The invention relates to the technical field of screw straightening, and in particular to a low-melting-point alloy filling and straightening device. Background Art

[0002] CNC machine tools are indispensable basic equipment in industrial production. The accuracy and stability of CNC machine tools mainly depend on the transmission elements. The lead screw is the most commonly used transmission element in CNC machine tools. Its main function is to convert rotational motion into linear motion, or to convert torque into axial repetitive force. Since the lead screw is a slender rod-shaped part and is a flexible part, it has poor rigidity and is very easy to deform. There will be processing errors such as straightness and cylindricity. Therefore, after the lead screw is processed, it is usually necessary to straighten the lead screw. The front section of the lead screw is a smooth bar. After the smooth bar is straightened, it is necessary to dig a spiral groove on the outer periphery of the smooth bar and then straighten the lead screw.

[0003] There are many methods for straightening the smooth rod in the prior art, and most of them use an inclined roller device to straighten it. In the process of digging the spiral groove on the smooth rod, the lead screw is prone to bending. Therefore, the lead screw needs to be straightened again after digging the spiral groove. If the straightening method of the smooth rod is directly transferred to the lead screw straightening, it is easy to damage the spiral groove. In the prior art, the lead screw straightening has always been manually inspected, and then the lead screw is straightened by a press using a two-point support and center-down pressure method. The straightening effect depends entirely on the worker's operating level and experience. Therefore, how to effectively straighten the lead screw and avoid damage to the spiral groove has become the main difficulty in lead screw straightening. Summary of the invention

[0004] The present invention aims to provide a device for straightening a lead screw by utilizing the liquid-to-solid state transformation of a low-melting-point alloy, thereby solving the above-mentioned problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides a low-melting-point alloy filling and straightening equipment, comprising: a molten pool, the molten pool comprising a heating element, a feed port and a discharge port, and a cooling device is provided on one end of the molten pool close to the discharge port; a straightening device, the straightening device comprising at least one pair of straightening rollers, and the discharge port is connected to the straightening rollers; a base, and the molten pool and the straightening device are arranged on the base.

[0006] As a further improvement of the present invention, it also includes: a first conveying device, which is arranged at the position of the feed port and / or the discharge port to drive the screw to be straightened to pass through the feed port, the heating element, and the discharge port in sequence; a first driving device, which is transmission-connected to the first conveying device.

[0007] As a further improvement of the present invention, the outer diameter of the molten pool is smaller than the length of the lead screw to be straightened.

[0008] As a further improvement of the present invention, it also includes: a second conveying device, the second conveying device includes a plurality of conveying rollers arranged in sequence, and the second conveying device is connected to the straightening device to transport the lead screw to be straightened from the conveying rollers to the straightening rollers.

[0009] As a further improvement of the present invention, the inner diameter of the discharge port close to the inside of the molten pool is larger than the inner diameter of the discharge port far from the inside of the molten pool.

[0010] As a further improvement of the present invention, the cooling device is a spiral cooling water circulation pipeline.

[0011] As a further improvement of the present invention, a post-processing module is also included, which includes a post-processing module substrate, a post-processing feed port and a post-processing discharge port arranged on the post-processing module substrate, and a heating device for heating the post-processing module substrate.

[0012] As a further improvement of the present invention, the post-processing module is arranged above the molten pool.

[0013] As a further improvement of the present invention, it also includes: a third conveying device, which is arranged at the position of the post-processing feed port and / or the post-processing discharge port to drive the straightening screw to rotate and / or move forward; a third driving device, which is transmission-connected to the third conveying device.

[0014] As a further improvement of the present invention, the straightening rollers are arranged in two rows in a staggered manner, and the straightening rollers are used to straighten the lead screw to be straightened.

[0015] After adopting the technical solution of the present invention, the following technical effects can be achieved:

[0016] (1) The low-melting-point alloy filling and straightening device provided by the present invention creatively sets a molten pool, utilizes the liquid-to-solid state transformation of the low-melting-point alloy to fill the spiral groove of the lead screw, so that the lead screw becomes a smooth rod, and then the smooth rod is straightened by the straightening device. The entire device has a simple structure and is easy to operate. After the straightening lead screw is inserted into the feed port, the preparation, straightening and cleaning processes can be completed under the action of the driving device, and no damage will be caused to the spiral groove of the lead screw;

[0017] (2) The melting temperature of the low melting point alloy in the present invention is relatively low, and only relatively low energy consumption is required to keep the low melting point alloy in a molten state. A cooling device is provided at the outlet of the molten pool, so that when the straightening screw passes through the molten pool, the low melting point alloy solidifies when it is cold and covers the spiral groove, so that the screw becomes a smooth rod. The method and device are both simple and feasible. After the straightening is completed, the low melting point alloy can be eliminated by heating, and the low melting point alloy can be recycled, saving costs.

[0018] (3) The low melting point alloy selected by the present invention expands or remains unchanged in volume when it changes from liquid to solid. Most alloys shrink in volume when they change from liquid to solid. The shrinkage will cause cracks when covered in the spiral groove of the lead screw, resulting in a loose connection. The alloy will fall off under a slight force, exposing the spiral groove. The low melting point alloy selected by the present invention expands or remains unchanged in volume when it changes from liquid to solid. The alloy can be tightly covered in the spiral groove of the lead screw. After the low melting point alloy becomes solid, it is cooled synchronously with the lead screw to be straightened. It is not easy to fall off during the cooling process, so the structure is more stable and the straightening effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 A schematic diagram of the structure of a lead screw straightening device provided in Example 1 of the present invention;

[0021] Figure 2 A schematic diagram of the structure of the molten pool and post-processing module provided in Example 1 of the present invention;

[0022] Figure 3 A schematic diagram of the structure of a lead screw straightening device provided in Example 1 of the present invention;

[0023] Figure 4 A front view of a lead screw straightening device provided in Example 1 of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the straightening device provided in Example 1 of the present invention.

[0025] Description of reference numerals:

[0026] 100-molten pool; 110-feed port; 120-discharge port; 130-first conveying device; 131-cage; 132-support seat; 200-straightening device; 210-straightening roller; 220-second conveying device; 221-positioning ring; 300-post-processing module; 310-post-processing module base; 320-post-processing feed port; 330-post-processing discharge port; 340-heating device; 350-third conveying device; 400-base; 500-screw to be straightened. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Combine the following Figures 1 to 5 The technical solution provided by the present invention is described in more detail.

[0029] [Example 1]

[0030] A low melting point alloy filling and straightening device, such as Figure 1-Figure 4 As shown, it includes: a base 400, a molten pool 100, a straightening device 200 and a post-processing module 300.

[0031] The susceptor 400 is provided with a molten pool 100 , a straightening device 200 and a post-processing module 300 .

[0032] The molten pool 100 includes a heating element that can heat the molten pool 100. In this embodiment, it is arranged at the bottom of the molten pool 100 to heat the molten pool 100. The molten pool 100 is provided with a feed port 110 and a discharge port 120. In this embodiment, the feed port 110 and the discharge port 120 are respectively arranged in the horizontal direction on both sides of the molten pool 100. A cooling device is arranged at one end of the outer side of the molten pool 100 near the discharge port 120. The lead screw 500 to be straightened enters from the feed port 110, passes through the molten pool 100, passes through the discharge port 120, and reaches the position of the cooling device to cool the low melting point alloy.

[0033] Further, such as Figure 2 As shown, the feed port 110 and the discharge port 120 are both provided with a first conveying device 130, which is provided on the base 400, and conveys the lead screw 500 to be straightened from the feed port 110 to the molten pool 100 at the feed port 110, and conveys the lead screw 500 to be straightened from the molten pool 100 to the outside of the discharge port 120 at the discharge port 120. The first conveying device 130 includes a support seat 132 and a clamping seat 131 provided at the end, the lead screw 500 to be straightened is inserted into the clamping seat 131, the support seat 132 is used to support the lead screw 500 to be straightened, and the clamping seat 131 and the support seat 132 can both move horizontally, and the driving device drives the clamping seat 131 and the lead screw 500 to be straightened through the feed port 110 into the molten pool 100, and then conveys them from the molten pool 100 through the discharge port 120 to the outside.

[0034] Furthermore, the first conveying device 130 may also be a conveying roller. Driven by the driving device, the lead screw 500 to be straightened is rotated around the axis by the conveying roller while advancing through the feed port 110 and being delivered through the discharge port 120 .

[0035] Specifically, the outer diameter of the molten pool 100 is smaller than the length of the lead screw 500 to be straightened, so as to ensure that the lead screw 500 to be straightened can pass through the discharge port 120 after entering the molten pool 100 from the feed port 110. After the lead screw 500 to be straightened passes through, the spiral groove is filled with low melting point alloy, so it is in a bare rod state. Among them, the outermost diameter of the molten pool 100 is smaller than the length of the lead screw 500 to be straightened, so that when the lead screw 500 to be straightened is inserted into the molten pool 100, at least one end is exposed to the outside, and then the lead screw 500 to be straightened can be pushed forward by the conveying device.

[0036] The straightening device 200 includes at least one pair of straightening rollers 210 , and the discharge port 120 is connected to the straightening rollers 210 . The lead screw 500 to be straightened can pass through the discharge port 120 and the straightening rollers 210 for straightening.

[0037] Specifically, Figure 5 As shown, the straightening device 200 comprises a second conveying device 220, which is a plurality of conveying rollers arranged in sequence. The lead screw 500 to be straightened is straightened by the straightening device 200 under the drive of the conveying rollers.

[0038] Specifically, the molten pool 100 is filled with a low melting point alloy, and the low melting point alloy is heated by a heating device to make the low melting point alloy in a molten state.

[0039] The molten pool 100 is connected to the straightening device 200. The lead screw 500 to be straightened enters from the feed port 110, passes through the molten pool 100, and is immersed in the melted low-melting-point alloy. The low-melting-point alloy fills the spiral groove of the lead screw 500 to be straightened. The lead screw 500 to be straightened passes through the molten pool 100 and passes through the discharge port 120. The entire device has a compact structure. The design of the molten pool 100 allows the spiral groove of the lead screw 500 to be straightened to be filled, and the lead screw 500 to be straightened is in a smooth state. Then, the lead screw 500 to be straightened is straightened in a smooth straightening manner. If the spiral groove of the lead screw 500 to be straightened is not filled, and the lead screw 500 to be straightened is directly straightened in a smooth straightening manner, the spiral groove of the lead screw will be damaged, and the force will be uneven during the straightening process, affecting the straightening effect. In the present invention, the characteristics of liquid-solid transformation of low-melting-point alloy are utilized to fill the spiral groove of the lead screw 500 to be straightened, so as to prepare for the straightening step and effectively improve the straightening effect.

[0040] Specifically, the inner diameter of the discharge port 120 shrinks from the inside of the molten pool 100 to the outside of the molten pool 100, and the low-melting-point alloy solution gradually cools and solidifies at the discharge port 120. The shrinkage of the inner diameter of the discharge port 120 causes the low-melting-point alloy solution to solidify only in the spiral groove of the lead screw, and excess low-melting-point alloy solution is squeezed back into the molten pool 100 as the lead screw 500 to be straightened continuously leaves the discharge port 120, and the lead screw 500 to be straightened gradually forms a smooth rod structure. Under the action of the first conveying device 130, the lead screw 500 to be straightened enters the molten pool 100 and is soaked in the low-melting-point alloy solution. With the drive of the first conveying device 130, one end of the lead screw 500 to be straightened enters the discharge port 120, and the other end of the lead screw 500 to be straightened gradually leaves the feed port 110, and the lead screw 500 to be straightened gradually goes deeper into the discharge port 120. The inner diameter of the discharge port 120 is matched with the outer diameter of the lead screw 500 to be straightened, and the low-melting-point alloy solution is filled in the spiral groove of the lead screw. Under the action of the cooling device, the low-melting-point alloy is quickly cooled and solidified, and the lead screw 500 to be straightened forms a smooth rod.

[0041] Furthermore, the cooling device is a spiral cooling water circulation pipeline. The spiral cooling water circulation pipeline is rotated and wound around the discharge port 120. Through the circulation of cooling water in the pipeline, the low melting point alloy solution at the discharge port 120 is rapidly cooled and solidified. It is prevented that the low melting point alloy solution is cooled too slowly and cannot be solidified in the spiral groove of the screw, which affects the straightening treatment effect.

[0042] In this embodiment, the second conveying device 220 is composed of conveying rollers. After the lead screw 500 to be straightened forming the optical bar passes through the discharge port 120 under the drive of the second conveying device 220, it passes through the straightening roller 210. The straightening roller 210 is continuously rotated under the action of the driving device, and the lead screw 500 to be straightened is straightened and driven forward.

[0043] Specifically, Figure 5 As shown, the straightening rollers 210 include two rows, one above the other. When the lead screw 500 to be straightened passes between the two rows of rollers staggered with each other, it is repeatedly bent, thereby straightening the lead screw 500. The low melting point alloy of the lead screw 500 to be straightened solidifies in the spiral groove of the lead screw, which protects the spiral groove of the lead screw and prevents the spiral groove of the lead screw from being damaged during the rotation and extrusion of the lead screw by the straightening rollers 210.

[0044] Furthermore, positioning rings 221 are provided at both ends of the straightening roller 210, and the lead screw 500 to be straightened needs to pass through the positioning rings 221 to position the lead screw 500 to ensure that the lead screw 500 to be straightened moves on a predetermined track.

[0045] In order to ensure the straightening effect, a detection device is provided at the rear end of the straightening device 200. Specifically, the detection device is an image sensor, which can perform image recognition on the straightened screw, collect information, compare the screw profile and other information, determine the straightening effect, and determine whether repeated straightening is needed until the screw meets the process requirements.

[0046] Furthermore, the low melting point alloy filling and straightening device 200 in this embodiment further includes a post-processing module 300, which includes a post-processing module base 310, a post-processing feed port 320 and a post-processing discharge port 330, a heating device 340 for heating the post-processing module base 310, and a reflux pipe connected to the molten pool 100 and arranged at the bottom of the post-processing module base 310. Specifically, the post-processing feed port 320 and / or the post-processing discharge port 330 are provided with a third conveying device 350, and the third conveying device 350 drives the lead screw 500 to be straightened to rotate and / or move forward through a driving device. Specifically, the third conveying device 350 is composed of conveying rollers, which are driven by a driving device. The straightened lead screw passes through the post-processing feed port 320 via the conveying rollers and enters the post-processing module base 310. By heating, the low-melting-point alloy filled in the spiral groove is melted again and falls into the bottom of the post-processing module base 310, and returns to the molten pool 100 through the reflux pipe. The straightened lead screw passes through the post-processing outlet 330. The low-melting-point alloy in the spiral groove of the lead screw is eliminated by the post-processing module 300 after straightening, so that the lead screw can be used normally, and the low-melting-point alloy can be reused. In this embodiment, the driving device can be a motor device or a cylinder device, and any device that can produce a driving effect can be used, including but not limited to the situations listed in this embodiment.

[0047] Furthermore, the post-processing module 300 is arranged above the molten pool 100. The heat of the molten pool 100 can be reused, so as to improve energy utilization and reduce energy loss. After being properly heated by the heating device 340 of the post-processing module 300, the low melting point alloy can be melted and dropped off. The bottom of the post-processing module 300 and the reflux pipe are eliminated, and the overall structure is simpler, the loss of the low melting point alloy is lower, the recovery rate is higher, and it is more in line with the concept of green environmental protection.

[0048] Furthermore, an ultrasonic vibration device is provided at the post-processing feed port 320 and / or the discharge port 120, and the molten low-melting-point alloy can be made to fall off more quickly and thoroughly through ultrasonic vibration, thereby reducing the number of post-processing times.

[0049] Furthermore, an image sensor is provided at the post-processing outlet 330, which performs image recognition on the processed lead screw, collects information, and compares information such as the lead screw profile to determine the cleaning effect, thereby determining whether further post-processing is needed until the lead screw meets the process requirements.

[0050] Furthermore, the low-melting-point alloy filling and straightening equipment provided by the present invention can be designed as a fully automatic device, and all processes are designed as fully automatic processes to avoid errors introduced by human factors, and the entire process is fast, efficient and accurate.

[0051] Furthermore, the melting point of the low melting point alloy is below 180°C. After melting, the alloy can solidify into the spiral groove of the screw. This temperature is much lower than the screw tempering temperature. Selecting a low melting point alloy can reduce the heating time, and the melting and solidification process will not affect the screw performance. If the heating temperature is too high, the temperature will affect the screw performance, which will in turn affect the changes in the screw material structure, resulting in poor screw performance.

[0052] Most alloys have a high melting point, and in the present invention, it is further preferred that the low melting point alloy contains bismuth. The melting point of bismuth itself is 273°C, and the melting point of some bismuth alloys is lower than 180°C, such as lead-bismuth alloy or tin-bismuth alloy.

[0053] [Example 2]

[0054] The same contents as those in Example 1 are not described in detail here. The difference is that in this embodiment, the feed port 110 is arranged at the top of the molten pool 100, and the discharge port 120 is arranged at the bottom of the molten pool 100. The lead screw 500 to be straightened enters from the feed port 110 at the top of the molten pool 100, passes through the molten pool 100, and passes through the discharge port 120. Specifically, the length of the lead screw 500 to be straightened is greater than the internal height of the molten pool 100. When the lead screw 500 to be straightened enters the discharge port 120, it has not yet separated from the feed port 110, and the movement and direction of the lead screw 500 to be straightened can be effectively guided.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low melting point alloy filling and straightening device, characterized in that: include: A molten pool (100), the molten pool (100) comprising a heating element, a feed port (110) and a discharge port (120), and a cooling device is provided at one end of the molten pool (100) close to the discharge port (120); A straightening device (200), the straightening device (200) comprising at least one pair of straightening rollers (210), the discharge port (120) being connected to the straightening rollers (210); A base (400), the molten pool (100) and the straightening device (200) being arranged on the base (400); Wherein, the inner diameter of the discharge port (120) close to the inside of the molten pool (100) is larger than the inner diameter of the discharge port (120) far from the inside of the molten pool (100); The inner diameter of the discharge port (120) shrinks from the inside of the molten pool (100) to the outside of the molten pool (100), and the low-melting-point alloy solution gradually cools and solidifies at the discharge port (120). The shrinkage of the inner diameter of the discharge port (120) causes the low-melting-point alloy solution to solidify only in the spiral groove of the lead screw, and the excess low-melting-point alloy solution is squeezed back into the molten pool (100) as the lead screw (500) to be straightened continuously leaves the discharge port (120), and the lead screw (500) to be straightened gradually forms a smooth rod structure.

2. The low melting point alloy filling and straightening equipment according to claim 1, characterized in that: Also includes: A first conveying device (130), the first conveying device (130) being arranged at the position of the feed port (110) and / or the discharge port (120) to drive the lead screw (500) to be straightened to pass through the feed port (110), the heating element, and the discharge port (120) in sequence; A first driving device, the first driving device is drivingly connected to the first conveying device (130).

3. The low melting point alloy filling and straightening equipment according to claim 1, characterized in that: The outer diameter of the molten pool (100) is smaller than the length of the lead screw (500) to be straightened.

4. The low melting point alloy filling and straightening equipment according to claim 1, characterized in that: Also includes: A second conveying device (220), the second conveying device (220) comprising a plurality of conveying rollers arranged in sequence, the second conveying device (220) being connected to the straightening device (200) so as to transport the lead screw (500) to be straightened from the conveying rollers to the straightening rollers (210).

5. The low melting point alloy filling and straightening equipment according to claim 1, characterized in that: The cooling device is a spiral cooling water circulation pipeline.

6. The low melting point alloy filling and straightening equipment according to claim 1, characterized in that: The invention also comprises a post-processing module (300), wherein the post-processing module (300) comprises a post-processing module base (310), a post-processing feed port (320) and a post-processing discharge port (330) arranged on the post-processing module base (310), and a heating device (340) for heating the post-processing module base (310).

7. The low melting point alloy filling and straightening device according to claim 6, characterized in that: The post-processing module (300) is arranged above the molten pool (100).

8. The low melting point alloy filling and straightening device according to claim 6, characterized in that: Also includes: a third conveying device (350), the third conveying device (350) being arranged at the position of the post-processing material inlet (320) and / or the post-processing material outlet (330) to drive the lead screw (500) to be straightened to rotate and / or move forward; A third driving device, the third driving device is drivingly connected to the third conveying device (350).

9. The low melting point alloy filling and straightening device according to claim 1, characterized in that: The straightening rollers (210) are arranged in two rows, one above the other, in a staggered manner. The straightening rollers (210) are used to straighten the lead screw (500) to be straightened.

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