A steel bar end face milling and chamfering machine and a processing method thereof

Abstract

The present application relates to the technical field of milling machine, disclose a kind of steel bar end face milling chamfering machine and processing method thereof, including milling machine, cross slide system of milling machine is provided with bearing table, bearing table is slidably provided with slide, and clamping assembly is rotatably installed on slide.The present application can realize the double cooperative clamping of the top and end of steel workpiece, form multidimensional force balance, and the clamping reliability is greatly improved, this double clamping structure can reduce the displacement, shaking or shifting of workpiece during processing, etc., ensure that the relative position of milling cutter and workpiece end face is always accurate, significantly reduce production safety hazard;And the pressure arm is designed with rotary drive, its initial state can be rotated to the position away from the workpiece placement area of bearing table, will not block the workpiece taking and placing path, when feeding, operator does not need to avoid pressure arm component additionally, can directly place workpiece in bearing table preset position stably, significantly shorten the feeding preparation time, improve the efficiency of single processing cycle.

Description

Technical Field

[0001] This invention belongs to the field of milling machine technology, specifically, it relates to a steel bar end face milling and chamfering machine and its processing method. Background Technology

[0002] In the field of steel bar processing, end milling and chamfering are key processes to ensure the accuracy of subsequent assembly and improve the appearance quality of products. They are widely used in various industries such as machinery manufacturing, construction engineering, and automotive parts. With the continuous improvement of industrial production requirements for processing efficiency and precision, the performance optimization of steel bar end milling and chamfering equipment has become a key focus of the industry.

[0003] Currently, existing steel bar end milling and chamfering machines generally use a single clamping block to directly press against the workpiece surface when fixing the workpiece. However, the pressing action of a single clamping block creates a one-dimensional force, which cannot achieve coordinated constraint between the top and end of the workpiece, making it difficult to construct a multi-dimensional force balance system. During milling and chamfering, the workpiece is easily displaced, shaken, or shifted due to the impact of the milling cutter's cutting force. This causes the relative position of the milling cutter and the workpiece end face to deviate from the preset accuracy, resulting in substandard end face flatness, excessive chamfering angle deviation, and other processing quality problems, seriously affecting the product qualification rate. Furthermore, to ensure clamping effectiveness, the clamping blocks of existing equipment are usually placed above or around the workpiece placement area. When picking up and placing the workpiece, the clamping blocks will obstruct the feeding path. Operators need to spend extra time avoiding the clamping block components to complete the workpiece positioning, significantly extending the feeding preparation time, reducing the efficiency of a single processing cycle, and restricting the increase in production capacity for mass production.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] A steel bar end face milling and chamfering machine, comprising a milling machine.

[0007] The milling machine has a cross slide system with a support table for supporting the workpiece. A pair of slide blocks are slidably mounted on the support table, and a clamping assembly is rotatably mounted on each pair of slide blocks for clamping and positioning the workpiece on the support table.

[0008] A pressure arm is rotatably mounted on the slide block, and a pressure block is movably inserted into the pressure arm. The lower surface of the pressure block is lower than the lower surface of the pressure arm. A pressure plate is movably inserted into the end of the pressure arm, and a rocker arm is rotatably mounted on the pressure plate. The end of the rocker arm is rotatably connected to the side wall of the pressure block.

[0009] The slide block is equipped with a guide cover on its side wall. The guide cover has a pressing groove, which is inclined and slidably connected to the side wall of the pressure arm. When the pressure arm rotates to cover the workpiece, it moves down through the pressing groove to clamp and fix the top of the workpiece. The pressure block on the pressure arm is squeezed and retracted. The rocker arm drives the pressure plate to slide towards the end of the workpiece to press the workpiece.

[0010] In a preferred embodiment of the present invention, a base is installed at the bottom of the milling machine. The base is in the shape of a boss and a counterweight is provided on the base. Four pads are installed at the bottom of the base, and anti-slip pads are provided at the bottom of the four pads. A milling cutter for chamfering operation is installed at the output end of the milling machine.

[0011] In a preferred embodiment of the present invention, a support plate is provided at the bottom of the support platform. The support plate is integrally cast with the support platform. The bottom of the support plate is connected to the output end of the cross slide system. Several pairs of grooves are provided on the support plate. The grooves are slidably connected to the slide block. The cross-sectional area of ​​the grooves is T-shaped.

[0012] In a preferred embodiment of the present invention, a bracket is installed on the side wall of the slide, the bracket is L-shaped, and a strip groove is formed on the bracket. A slot is formed on the side wall of the support platform, the slot has a concave cross-sectional area, and an internal hexagonal bolt is slidably disposed inside the slot. The internal hexagonal end of the internal hexagonal bolt is engaged in the slot, the bolt shank of the internal hexagonal bolt is movably inserted into the strip groove, and a locking nut is screwed onto the end of the internal hexagonal bolt. The locking nut is used to position the internal hexagonal bolt, thereby locking the slide and the support platform.

[0013] In a preferred embodiment of the present invention, a drive motor is installed inside the slide block, a sleeve shaft is installed at the output end of the drive motor, an insert shaft is inserted into the sleeve shaft, the end of the insert shaft is connected to the pressure arm, a baffle is slidably arranged inside the sleeve shaft, one end of the baffle is connected to the insert shaft, and a return spring is sleeved on the outer wall of the insert shaft inside the sleeve shaft, one end of the return spring is engaged with the end of the sleeve shaft, and the other end of the return spring is engaged with the baffle.

[0014] In a preferred embodiment of the present invention, a sliding plate is installed on the side wall of the pressure block. The sliding plate is located above the pressure arm. A guide rod is inserted through the sliding plate. The bottom of the guide rod is installed above the pressure arm. A guide plate is installed on the top of the guide rod. The cross-sectional area of ​​the guide plate is larger than that of the guide rod. The guide plate prevents the sliding plate from separating from the sliding plate.

[0015] In a preferred embodiment of the present invention, the surface of the pressure plate is arc-shaped, a limiting rod is installed on the side wall of the pressure plate, the end of the limiting rod is inserted into the end of the pressure arm, a limiting plate is installed on the limiting rod, a limiting spring is sleeved on the limiting rod, one end of the limiting spring is snapped into the limiting plate, and the other end of the limiting spring is snapped into the end of the pressure arm.

[0016] In a preferred embodiment of the present invention, the guide cover is arc-shaped, the center of curvature of the guide cover is the same as the rotation center of the pressure arm, a fixing frame is installed at the bottom of the guide cover, the bottom of the fixing frame is installed on the side wall of the slide block, a reversing groove is provided on the guide cover, the reversing groove is annular and connected to the pressing groove, the reversing groove is used to guide the pressure arm to slide upward toward the workpiece.

[0017] In a preferred embodiment of the present invention, a light rod is installed on the side wall of the pressure arm, and a ball bearing is installed at the end of the light rod, the ball bearing being slidably disposed in the reversing groove.

[0018] A method for milling and chamfering the end face of a steel bar, comprising the following steps:

[0019] Step 1: Equipment debugging and spacing adjustment. According to the length specifications of the steel strip workpiece to be processed, loosen the locking nut on the side wall bracket of the slide block, and push the slide block to slide along the T-shaped groove on the bearing plate. At this time, the hexagonal socket bolt slides along the concave groove on the side wall of the bearing platform, and its bolt rod moves synchronously in the strip groove of the bracket. After adjusting the spacing between the two pairs of slide blocks to match the length of the workpiece, tighten the locking nut to lock the slide block and complete the spacing positioning. At the same time, check the fit of the bottom pad and anti-slip pad of the base to ensure that the equipment is placed stably.

[0020] Step 2: Workpiece loading and preliminary positioning. Place the steel strip workpiece to be processed stably on the support surface of the bearing table, adjust the workpiece placement position so that both ends of the workpiece are respectively located in the clamping component area of ​​the two pairs of slides, and ensure that the end face of the workpiece to be processed faces the milling cutter direction of the milling machine output end, thus completing the preliminary positioning of the workpiece.

[0021] Step 3: Workpiece clamping and fixing. Start the drive motor inside the slide block. The drive motor drives the pressure arm to rotate through the sleeve shaft and insert shaft. The ball bearings at the end of the smooth rod on the side wall of the pressure arm slide and guide along the annular reversing groove of the guide cover, causing the pressure arm to rotate upward and cover the workpiece. When the ball bearings slide into the inclined pressing groove, the pressing groove exerts downward pressure on the smooth rod, causing the pressure arm to move down. The insert shaft slides along the inside of the sleeve shaft and compresses the return spring through the baffle. The pressure block first contacts the top of the workpiece and is squeezed back, causing the slide plate to slide up along the guide rod. At the same time, the rocker arm pulls the pressure plate to slide towards the end of the workpiece. The limiting plate on the limiting rod compresses the limiting spring until the pressure arm rotates to the set position. The pressure block and the pressure plate press tightly against the top and end of the workpiece under the elastic force of the return spring and the limiting spring, respectively, completing the double clamping and fixing.

[0022] Step 4: End face milling and chamfering. Start the milling machine to make the milling cutter at the output end rotate at high speed. At the same time, start the cross slide system of the milling machine. The cross slide drives the support table and the workpiece after clamping and fixing through the support plate to make X / Y axis linkage motion, so that the end face of the workpiece to be processed can be smoothly and accurately approached by the rotating milling cutter. After the milling cutter contacts the workpiece, it mills the edge of the end face according to the preset chamfer angle and size, and simultaneously completes the end face flattening and chamfering. During the processing, the counterweight on the base works together with the pad and anti-slip pad to suppress milling vibration and ensure processing accuracy.

[0023] Step 5: Unload the workpiece and reset the equipment. After the milling and chamfering of the workpiece end face is completed, control the drive motor to reverse and drive the pressure arm to rotate in the opposite direction. Finally, remove the finished workpiece, turn off the milling machine and cross slide system, and complete one processing cycle.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] This invention utilizes a precise linkage structure of the pressure arm, pressure block, pressure plate, and rocker arm to achieve dual coordinated clamping of the top and end of the steel workpiece, forming a multi-dimensional force balance and significantly improving clamping reliability. This dual clamping structure reduces problems such as workpiece displacement, shaking, or movement during processing, ensuring that the relative position between the milling cutter and the workpiece end face remains accurate. This significantly improves the flatness of end face milling and the angle accuracy of chamfering, while also reducing production safety hazards. Furthermore, the pressure arm adopts a rotary drive design, which can initially rotate to a position away from the workpiece placement area on the support table, without obstructing the workpiece's picking and placing path. During loading, operators do not need to avoid the pressure arm components and can directly and stably place the workpiece in the preset position on the support table, significantly shortening loading preparation time and improving the efficiency of a single processing cycle.

[0026] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0027] In the attached diagram:

[0028] Figure 1 A 3D model of a steel bar end milling and chamfering machine;

[0029] Figure 2 This is a front view of a steel bar end face milling and chamfering machine;

[0030] Figure 3 This is a structural diagram of the support platform for a steel bar end milling and chamfering machine;

[0031] Figure 4 This is a structural diagram of the clamping assembly of a steel bar end milling and chamfering machine;

[0032] Figure 5 For a steel bar end face milling and chamfering machine Figure 4 Front view;

[0033] Figure 6 For a steel bar end face milling and chamfering machine Figure 5 Enlarged view of point A in the middle;

[0034] Figure 7 A partial view of a steel bar end face milling and chamfering machine;

[0035] Figure 8 This is a sectional view of the sleeve shaft of a steel bar end milling and chamfering machine.

[0036] In the picture:

[0037] 1. Milling machine; 11. Base; 111. Pad; 12. Bearing platform; 121. Bearing plate; 122. Groove; 123. Slide; 124. Bracket; 125. Slot; 126. Strip groove; 127. Socket head cap screw; 128. Locking nut;

[0038] 2. Pressure arm; 21. Drive motor; 211. Sleeve shaft; 212. Insert shaft; 213. Baffle; 214. Return spring; 22. Pressure block; 221. Slide plate; 222. Guide rod; 223. Guide plate; 23. Pressure plate; 231. Limiting rod; 232. Limiting plate; 233. Limiting spring; 234. Rocker arm; 24. Guide cover; 241. Fixing frame; 242. Reversing groove; 243. Pressing groove; 244. Smooth rod; 245. Ball bearing. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0040] Example 1:

[0041] like Figures 1 to 8 As shown, a steel bar end face milling and chamfering machine includes a milling machine 1.

[0042] The milling machine 1 has a cross slide system with a support table 12 for supporting the workpiece. A pair of slides 123 are slidably arranged on the support table 12. A clamping assembly is rotatably installed on each pair of slides 123. The clamping assembly is used to clamp and position the workpiece on the support table 12.

[0043] A pressure arm 2 is rotatably mounted on the slide block 123. A pressure block 22 is movably inserted into the pressure arm 2, and the lower surface of the pressure block 22 is lower than the lower surface of the pressure arm 2. A pressure plate 23 is movably inserted into the end of the pressure arm 2. A rocker arm 234 is rotatably mounted on the pressure plate 23, and the end of the rocker arm 234 is rotatably connected to the side wall of the pressure block 22.

[0044] A guide cover 24 is installed on the side wall of the slide block 123. A pressing groove 243 is provided on the guide cover 24. The pressing groove 243 is in an inclined state and is slidably connected to the side wall of the pressing arm 2. When the pressing arm 2 rotates to cover the workpiece, the pressing groove 243 drives the pressing arm 2 to move down to clamp and fix the top of the workpiece. The pressing block 22 on the pressing arm 2 is squeezed and retracted. The rocker arm 234 drives the pressure plate 23 to slide towards the end of the workpiece to press the workpiece.

[0045] like Figures 1 to 8 As shown in the specific embodiment, a base 11 is installed at the bottom of the milling machine 1. The base 11 is in the shape of a boss, and a counterweight is provided on the base 11. Four pads 111 are installed at the bottom of the base 11, and anti-slip pads are provided on the bottom of the four pads 111. A milling cutter for chamfering operation is installed at the output end of the milling machine 1. The boss-shaped base 11 improves the overall stability of the equipment's center of gravity; the counterweight further enhances the equipment's vibration resistance during operation; the pads 111 and the bottom anti-slip pads increase the friction with the placement surface, preventing equipment displacement during processing.

[0046] like Figures 1 to 8 As shown, furthermore, a support plate 121 is provided at the bottom of the support platform 12. The support plate 121 and the support platform 12 are integrally cast. The bottom of the support plate 121 is connected to the output end of the cross slide system. Several pairs of grooves 122 are formed on the support plate 121. The grooves 122 are slidably connected to the slide block 123. The cross-sectional area of ​​the grooves 122 is T-shaped. The integral casting of the support plate 121 and the support platform 12 improves the structural strength and reduces the displacement error caused by the connection gap. The support plate 121 realizes the stable connection between the support platform 12 and the cross slide system, ensuring accurate motion transmission. The cooperation between the T-shaped grooves 122 and the slide block 123 restricts the vertical displacement of the slide block 123, ensuring smooth sliding and improving the accuracy of spacing adjustment.

[0047] like Figures 1 to 8As shown, further, a bracket 124 is installed on the side wall of the slide 123. The bracket 124 is L-shaped and has a strip groove 126. A slot 125 is provided on the side wall of the support platform 12. The cross-sectional area of ​​the slot 125 is concave. An internal hexagon bolt 127 is slidably disposed inside the slot 125. The internal hexagon end of the internal hexagon bolt 127 is engaged in the slot 125. The bolt shank of the internal hexagon bolt 127 is movably inserted into the strip groove 126. A locking nut 128 is screwed onto the end of the internal hexagon bolt 127. The locking nut 128 is used to position the internal hexagon bolt 127, so that the slide 123 and the support platform 12 are locked. The L-shaped bracket 124 provides a stable mounting base, ensuring the reliability of the bolt connection; the concave groove 125 restricts the rotation of the internal hex bolt 127, facilitating the tightening operation of the locking nut 128; the locking nut 128 enables the slide 123 to be quickly locked and unlocked, improving the efficiency of spacing adjustment.

[0048] Example 2:

[0049] The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, a drive motor 21 is installed inside the slide block 123. A sleeve shaft 211 is installed at the output end of the drive motor 21. An insert shaft 212 is inserted into the sleeve shaft 211, and the end of the insert shaft 212 is connected to the pressure arm 2. A baffle 213 is slidably arranged inside the sleeve shaft 211. One end of the baffle 213 is connected to the insert shaft 212. A return spring 214 is sleeved on the outer wall of the insert shaft 212 inside the sleeve shaft 211. One end of the return spring 214 is engaged with the end of the sleeve shaft 211, and the other end is engaged with the baffle 213. The drive motor 21 provides power for the rotation of the pressure arm 2, realizing automated clamping and improving processing efficiency. The insertion and cooperation of the sleeve shaft 211 and the insert shaft 212 realizes the extension and contraction compensation of the rotation and downward movement of the pressure arm 2, adapting to the clamping stroke requirements. The cooperation of the return spring 214 and the baffle 213 realizes the automatic reset of the pressure arm 2, eliminating the need for manual operation and simplifying the process.

[0050] like Figures 1 to 8 As shown, in a specific embodiment, a sliding plate 221 is installed on the side wall of the pressure block 22. The sliding plate 221 is located above the pressure arm 2. A guide rod 222 is inserted through the sliding plate 221. The bottom of the guide rod 222 is installed above the pressure arm 2, and a guide plate 223 is installed on the top of the guide rod 222. The cross-sectional area of ​​the guide plate 223 is larger than that of the guide rod 222. The guide plate 223 prevents the sliding plate 221 from separating from the sliding plate 222. The cooperation between the sliding plate 221 and the guide rod 222 provides guidance for the retraction and reset of the pressure block 22, ensuring smooth movement. The guide plate 223 effectively prevents the sliding plate 221 from separating from the guide rod 222, improving structural safety and reliability.

[0051] like Figures 1 to 8As shown, the surface of the pressure plate 23 is arc-shaped. A limiting rod 231 is installed on the side wall of the pressure plate 23. The end of the limiting rod 231 is inserted into the end of the pressure arm 2. A limiting plate 232 is installed on the limiting rod 231. A limiting spring 233 is sleeved on the limiting rod 231. One end of the limiting spring 233 is engaged with the limiting plate 232, and the other end of the limiting spring 233 is engaged with the end of the pressure arm 2. The arc-shaped pressure plate 23 can better conform to the contour of the workpiece end, improve the pressing stability, and avoid damage to the workpiece. The insertion and cooperation between the limiting rod 231 and the pressure arm 2 provides guidance for the sliding of the pressure plate 23, ensuring accurate movement. The limiting spring 233 provides continuous pressing force to the pressure plate 23, improving the end clamping firmness. The limiting plate 232 prevents the limiting rod 231 from separating from the pressure arm 2, ensuring structural integrity.

[0052] like Figures 1 to 8 As shown, the guide cover 24 is arc-shaped, and the center of curvature of the guide cover 24 is the same as the rotation center of the pressure arm 2. A fixing frame 241 is installed at the bottom of the guide cover 24, and the bottom of the fixing frame 241 is installed on the side wall of the slide block 123. A reversing groove 242 is provided on the guide cover 24. The reversing groove 242 is annular and is connected to the pressing groove 243. The reversing groove 242 is used to guide the pressure arm 2 to slide upward toward the workpiece. A smooth rod 244 is installed on the side wall of the pressure arm 2, and a ball bearing 245 is installed at the end of the smooth rod 244. The ball bearing 245 is slidably disposed in the reversing groove 242. The arc-shaped guide cover 24 is aligned with the rotation center of the pressure arm 2, ensuring smooth guidance and reducing motion resistance; the fixed frame 241 achieves a stable connection between the guide cover 24 and the slide block 123, improving guidance reliability; the reversing groove 242 provides initial guidance for the rotation of the pressure arm 2, ensuring that the pressure arm 2 accurately points above the workpiece; the cooperation between the smooth rod 244 and the ball bearing 245 converts sliding friction into rolling friction, reducing wear and improving motion stability.

[0053] This invention also discloses a method for milling and chamfering the end face of a steel bar, the steps of which are as follows:

[0054] Step 1: Equipment debugging and spacing adjustment. According to the length specifications of the steel strip workpiece to be processed, loosen the locking nut 128 on the side wall bracket 124 of the slide 123, and push the slide 123 to slide along the T-shaped groove 122 on the bearing plate 121. At this time, the hexagonal socket bolt 127 slides along the concave groove 125 on the side wall of the bearing platform 12, and its bolt rod moves synchronously in the strip groove 126 of the bracket 124. After adjusting the spacing between the two pairs of slides 123 to match the length of the workpiece, tighten the locking nut 128 to lock the slide 123, and complete the spacing positioning. At the same time, check the fit of the bottom pad 111 and anti-slip pad of the base 11 to ensure that the equipment is placed stably.

[0055] Step 2: Workpiece loading and preliminary positioning. Place the steel strip workpiece to be processed stably on the support surface of the bearing table 12, adjust the workpiece placement position so that both ends of the workpiece are respectively located in the clamping component area of ​​the two pairs of slides 123, and ensure that the end face of the workpiece to be processed faces the milling cutter direction of the output end of the milling machine 1 to complete the preliminary positioning of the workpiece.

[0056] Step 3: The workpiece is clamped and fixed. The drive motor 21 inside the slide block 123 is started. The drive motor 21 drives the pressure arm 2 to rotate through the sleeve shaft 211 and the insert shaft 212. The ball bearing 245 at the end of the smooth rod 244 on the side wall of the pressure arm 2 slides and guides along the annular reversing groove 242 of the guide cover 24, so that the pressure arm 2 rotates upward to cover the workpiece. When the ball bearing 245 slides into the inclined pressing groove 243, the pressing groove 243 exerts downward pressure on the smooth rod 244, causing the pressure arm 2 to move downward. The insert shaft 212 slides along the inside of the sleeve shaft 211. The pressure block 22 first contacts the top of the workpiece and is squeezed back, causing the slide plate 221 to slide up along the guide rod 222. At the same time, the rocker arm 234 pulls the pressure plate 23 to slide towards the end of the workpiece. The limiting plate 232 on the limiting rod 231 compresses the limiting spring 233 until the pressure arm 2 rotates to the set position. The pressure block 22 and the pressure plate 23 press tightly against the top and end of the workpiece under the elastic force of the return spring 214 and the limiting spring 233, respectively, to complete the double clamping and fixing.

[0057] Step 4: End face milling and chamfering. Start milling machine 1 to make the milling cutter at the output end rotate at high speed. At the same time, start the cross slide system of milling machine 1. The cross slide drives the support table 12 and the workpiece after clamping and fixing through the support plate 121 to make X / Y axis linkage motion, so that the end face of the workpiece to be processed can be smoothly and accurately approached by the rotating milling cutter. After the milling cutter contacts the workpiece, it mills the edge of the end face according to the preset chamfer angle and size, and simultaneously completes the end face flattening and chamfering. During the processing, the counterweight on the base 11, the pad plate 111, and the anti-slip pad work together to suppress milling vibration and ensure processing accuracy.

[0058] Step 5: Unloading the workpiece and resetting the equipment. After the milling and chamfering of the workpiece end face is completed, control the drive motor 21 to reverse and drive the pressure arm 2 to rotate in the opposite direction. Finally, remove the finished workpiece, turn off the milling machine 1 and the cross slide system, and complete one processing cycle.

[0059] The implementation principle of the steel bar end face milling and chamfering machine of the present invention is as follows:

[0060] First, prepare for workpiece processing. According to the specifications of the steel bar workpiece to be processed, loosen the locking nut 128 on the slide 123. At this time, the hexagon socket bolt 127 can slide along the slot 125 on the side wall of the support platform 12, thereby driving the slide 123 to slide along the groove 122 on the support plate 121. After adjusting the distance between the two pairs of slides 123 to match the length of the workpiece, tighten the locking nut 128. The sliding nut 123 and the support platform 12 are locked and fixed by the cooperation of the locking nut 128 and the hexagon socket bolt 127, thus completing the distance adjustment.

[0061] The steel bar workpiece to be processed is placed on the support platform 12, so that the two ends of the workpiece are positioned between the clamping components of the two pairs of slides 123. The drive motor 21 inside the slide 123 is started. The output end of the drive motor 21 drives the sleeve shaft 211 to rotate. The sleeve shaft 211 drives the pressure arm 2 to rotate synchronously through the insert shaft 212. At this time, the ball 245 at the end of the smooth rod 244 on the side wall of the pressure arm 2 slides along the reversing groove 242 of the guide cover 24. The reversing groove 242 guides the rotation direction of the pressure arm 2, ensuring that the pressure arm 2 rotates to cover the workpiece. When the pressure arm 2 rotates to a position close to the top of the workpiece, the ball 245 slides from the reversing groove 242 into the inclined pressing groove 243. As the pressure arm 2 continues to rotate, the inclined pressing groove 243 exerts downward pressure on the light rod 244, causing the pressure arm 2 to move downward as a whole. At this time, the insert shaft 212 slides along the inside of the sleeve shaft 211, pushing the baffle 213 to compress the return spring 214 inside the sleeve shaft 211, thereby realizing the linkage between the rotation and downward movement of the pressure arm 2.

[0062] During the downward movement of the pressure arm 2, the pressure block 22 at its bottom first contacts the top of the steel workpiece. As the pressure arm 2 continues to move downward, the workpiece generates an upward reaction force on the pressure block 22, causing the pressure block 22 to retract relative to the pressure arm 2. When the pressure block 22 retracts, it drives the slide plate 221 to slide upward along the guide rod 222. The guide rod 222 and the guide plate 223 cooperate to ensure the stability of the pressure block 22 during the retraction process. At the same time, the side wall of the pressure block 22 drives the pressure plate 23 to slide towards the end of the workpiece through the rocker arm 234. When the pressure plate 23 slides, the limiting rod 231 on its side wall slides along the end of the pressure arm 2, and the limiting plate 232 compresses the limiting spring 233. The elastic force generated by the limiting spring 233 makes the pressure plate 23 fit tightly against the end of the workpiece. When the pressure arm 2 rotates to the set position, the pressure block 22 presses tightly against the top of the workpiece under the reaction force of the return spring 214, and the pressure plate 23 presses tightly against the end of the workpiece under the reaction force of the limit spring 233. The workpiece is double-clamped and fixed through the synergistic action of the pressure block 22 and the pressure plate 23, thus preventing the workpiece from shifting during the processing.

[0063] After the workpiece is clamped and fixed, the milling machine 1 is started. The milling cutter at the output end of the milling machine 1 rotates, and at the same time, the cross slide system of the milling machine 1 drives the carrier table 12 to move. The carrier table 12 drives the workpiece to move synchronously through the carrier plate 121. With the help of the X / Y axis linkage adjustment of the cross slide system, the carrier table drives the workpiece to move smoothly and accurately, so that the end face of the workpiece to be processed gradually approaches the high-speed rotating milling cutter. After the milling cutter contacts the end face of the workpiece, it mills the edge of the end face according to the preset chamfer angle and size, and simultaneously completes the end face flattening and chamfering, finally obtaining the end face chamfer structure that meets the requirements. During the processing, the pad 111 and anti-slip pad at the bottom of the base 11 enhance the stability of the equipment, and the counterweight on the base 11 further improves the stability of the equipment during operation, avoiding milling vibration from affecting the processing accuracy.

[0064] After the workpiece is processed, the drive motor 21 is reversed. The drive motor 21 drives the pressure arm 2 to rotate in the opposite direction through the sleeve shaft 211 and the insert shaft 212. At this time, the ball bearing 245 slides back from the pressing groove 243 to the reversing groove 242. The downward pressure of the pressing groove 243 on the guide rod 244 disappears. The return spring 214 in the sleeve shaft 211 releases its elastic force, pushing the baffle 213 to drive the insert shaft 212 to reset, and then driving the pressure arm 2 to reset upward. During the reset process of the pressure arm 2, the reaction force of the workpiece on the pressure block 22 disappears. It resets under its own weight and the cooperation of the slide plate 221 and the guide rod 222. At the same time, the limit spring 233 releases its elastic force, pushing the limit plate 232 to drive the limit rod 231 to reset. Then, the rocker arm 234 drives the pressure plate 23 to reset, releasing the clamping of the workpiece. Finally, the processed workpiece is removed, completing one milling and chamfering cycle.

[0065] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel bar end face milling and chamfering machine, comprising a milling machine (1), characterized in that: The milling machine (1) has a cross slide system with a support table (12) for supporting the workpiece. A pair of slide blocks (123) are slidably arranged on the support table (12). A clamping assembly is rotatably installed on each pair of slide blocks (123) for clamping and positioning the workpiece on the support table (12). A pressure arm (2) is rotatably mounted on the slide (123). A pressure block (22) is movably inserted into the pressure arm (2), and the lower surface of the pressure block (22) is lower than the lower surface of the pressure arm (2). A pressure plate (23) is movably inserted into the end of the pressure arm (2). A rocker arm (234) is rotatably mounted on the pressure plate (23), and the end of the rocker arm (234) is rotatably connected to the side wall of the pressure block (22). The slide block (123) is equipped with a guide cover (24) on its side wall. The guide cover (24) is provided with a pressing groove (243). The pressing groove (243) is in an inclined state. The pressing groove (243) is slidably connected to the side wall of the pressing arm (2). When the pressing arm (2) rotates to cover the workpiece, the pressing groove (243) drives the pressing arm (2) to move down to clamp and fix the top of the workpiece. The pressing block (22) on the pressing arm (2) is squeezed back. The rocker arm (234) drives the pressing plate (23) to slide towards the end of the workpiece to press the workpiece. The guide cover (24) is arc-shaped, and the center of curvature of the guide cover (24) is the same as the rotation center of the pressure arm (2). A fixing frame (241) is installed at the bottom of the guide cover (24). The bottom of the fixing frame (241) is installed on the side wall of the slide (123). A reversing groove (242) is provided on the guide cover (24). The reversing groove (242) is annular and connected to the pressing groove (243). The reversing groove (242) is used to guide the pressure arm (2) to slide upward toward the workpiece. The pressure arm (2) is equipped with a light rod (244) on its side wall, and a ball bearing (245) is installed at the end of the light rod (244). The ball bearing (245) is slidably disposed in the reversing groove (242).

2. A steel bar end face milling and chamfering machine according to claim 1, characterized in that, The milling machine (1) is equipped with a base (11) at the bottom. The base (11) is in the shape of a boss. A counterweight is provided on the base (11). Four pads (111) are installed at the bottom of the base (11). Anti-slip pads are provided at the bottom of the four pads (111). A milling cutter for chamfering operation is installed at the output end of the milling machine (1).

3. A steel bar end face milling and chamfering machine according to claim 1, characterized in that, The support platform (12) is provided with a support plate (121) at the bottom. The support plate (121) and the support platform (12) are integrally cast. The bottom of the support plate (121) is connected to the output end of the cross slide system. Several pairs of grooves (122) are provided on the support plate (121). The grooves (122) are slidably connected to the slide (123). The cross-sectional area of ​​the grooves (122) is T-shaped.

4. A steel bar end face milling and chamfering machine according to claim 1, characterized in that, The slide (123) is equipped with a bracket (124) on its side wall. The bracket (124) is L-shaped and has a strip groove (126). The support platform (12) has a slot (125) on its side wall. The slot (125) has a concave cross-sectional area. An internal hexagonal bolt (127) is slidably disposed inside the slot (125). The internal hexagonal end of the internal hexagonal bolt (127) is engaged in the slot (125). The bolt shank of the internal hexagonal bolt (127) is movably inserted into the strip groove (126). A locking nut (128) is screwed onto the end of the internal hexagonal bolt (127). The locking nut (128) is used to position the internal hexagonal bolt (127) so that the slide (123) and the support platform (12) are locked.

5. A steel bar end face milling and chamfering machine according to claim 1, characterized in that, The slide (123) is equipped with a drive motor (21), and the output end of the drive motor (21) is equipped with a sleeve shaft (211). A plug shaft (212) is inserted into the sleeve shaft (211). The end of the plug shaft (212) is connected to the pressure arm (2). A baffle (213) is slidably arranged inside the sleeve shaft (211). One end of the baffle (213) is connected to the plug shaft (212). A return spring (214) is sleeved on the outer wall of the plug shaft (212) inside the sleeve shaft (211). One end of the return spring (214) is clamped to the end of the sleeve shaft (211), and the other end of the return spring (214) is clamped to the baffle (213).

6. A steel bar end face milling and chamfering machine according to claim 1, characterized in that, The pressure block (22) has a sliding plate (221) installed on its side wall. The sliding plate (221) is located above the pressure arm (2). A guide rod (222) is inserted through the sliding plate (221). The bottom of the guide rod (222) is installed above the pressure arm (2). A guide plate (223) is installed on the top of the guide rod (222). The cross-sectional area of ​​the guide plate (223) is larger than that of the guide rod (222). The guide plate (223) prevents the sliding plate (221) from separating from the sliding plate (221).

7. A steel bar end face milling and chamfering machine according to claim 1, characterized in that, The surface of the pressure plate (23) is arc-shaped. A limit rod (231) is installed on the side wall of the pressure plate (23). The end of the limit rod (231) is inserted into the end of the pressure arm (2). A limit plate (232) is installed on the limit rod (231). A limit spring (233) is sleeved on the limit rod (231). One end of the limit spring (233) is snapped onto the limit plate (232), and the other end of the limit spring (233) is snapped onto the end of the pressure arm (2).

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