Turning device for bolt machining production

Abstract

The invention relates to the technical field of turning machining, in particular to a turning machining device for bolt machining and production, which comprises a lathe body consisting of a lathe bed, a driving and guiding assembly, a clamping assembly for clamping a blank and a cutter arranged at the top of the driving and guiding assembly, and the driving and guiding assembly and the clamping assembly are both arranged on the lathe bed. In the whole turning process, the three-jaw chuck, the ejector pin and the supporting assembly conduct double supporting on the blank, in the whole turning process, the supporting assembly is always located at the position, a small distance away from the left side of the tool, of the left side of the blank, and the supporting assembly moves synchronously along with gradual movement of the tool towards the left side of the blank; according to the technical scheme, it is ensured that the cutting point of the cutter is located at the supporting assembly all the time, the stability of the blank in the whole turning process is ensured through the dynamic adjusting capacity, blank deformation and vibration caused by the cantilever effect are avoided, and therefore the influence of the cantilever effect can be effectively avoided, and the machining precision is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of pin turning, and more specifically, to a turning device for bolt processing. Background Art

[0002] Bolts are common fasteners, which usually consist of two parts: a head and a screw (a cylinder with external threads). Bolts are used to fix two or more parts together, either by using them in conjunction with nuts or by screwing them directly into holes with internal threads. Bolt processing generally includes cold heading, turning, hot heading and forging. Bolts used in aerospace, medical equipment, precision instruments and other fields usually have extremely high requirements for dimensional accuracy and flatness. In these applications, any slight deviation may cause assembly problems or affect equipment performance, so turning is required to ensure the geometry and surface quality of the bolt shank.

[0003] Specifically, during turning, the bolt blank is clamped in the chuck of the lathe, and the other end is fixed by a pin, and then the chuck drives the blank to rotate at high speed and cooperates with the tool to turn the bolt shank (that is, the blank is turned into the required diameter size). However, this processing method still has certain defects when processing long screws: 1. Since the long screw has a large aspect ratio, it is easy to produce a cantilever effect during the turning process. Even with chuck clamping and ejector support, the length of the long screw is much larger than its diameter (that is, the aspect ratio is large), and there will be a large overhanging area in the screw, causing the screw to bend or vibrate under high-speed rotation. This not only affects the processing accuracy, but may also lead to a decrease in surface quality and even damage the tool.

[0004] 2. Although auxiliary support structures are added to a small number of lathes to strengthen the support for the screw to reduce the cantilever effect and improve processing stability, this means that when turning, it is necessary to start from one end of the screw and gradually turn each small section until the entire long screw is processed. After turning a section each time, the position of the support structure is adjusted and the next section is processed to avoid interference between the support structure and the tool and the surface where the support structure contacts the outer diameter of the long screw cannot be turned, which makes the turning efficiency need to be improved. Summary of the invention

[0005] The invention provides a turning processing device for bolt processing production, which solves the technical problems that a long screw with a large aspect ratio is prone to cantilever effect during turning and the current auxiliary support interferes with the tool, thus requiring segmented processing.

[0006] The present invention provides a turning processing device for bolt processing production, including a lathe body composed of a bed, a guide assembly, a clamping assembly for clamping a blank and a tool arranged on the top of the guide assembly. The guide assembly and the clamping assembly are both arranged on the bed, and a follow-up auxiliary support unit and a reinforced guide unit are arranged on the top of the bed. The follow-up auxiliary support unit includes a triangular frame that moves with the guide assembly, a support assembly arranged on the triangular frame, a locking assembly for locking the support assembly and a control assembly for controlling the locking assembly. The support assembly, the locking assembly and the control assembly are all provided in three and distributed in a triangle.

[0007] The supporting assembly includes a supporting plate fixedly mounted on the inner wall of the triangular frame and two return springs fixedly mounted on the side of the supporting plate away from the corresponding inner corner of the triangular frame. The other ends of the two return springs are jointly mounted with a mounting frame. The side of the mounting frame away from the return spring is an arc surface and is rotatably mounted with a plurality of pulleys. The side of the mounting frame away from the pulley is fixedly mounted with a lifting plate that slides through the supporting plate, and the locking assembly is arranged on the lifting plate.

[0008] The guide assembly drives the tool to move from the right end of the blank to the left for turning, and the triangular frame moves accordingly. The locking assembly locks the rear pulley to press the blank. When turning begins and when turning is about to be completed, the control assembly controls the locking assembly to drive the pulley to press and separate from the blank.

[0009] Furthermore, the support assembly also includes two limit rods that are symmetrically installed on the top of the mounting frame and slide through the support plate. Two return springs are respectively mounted on the outside of the front and rear limit rods, and a limit plate is provided on the top of the limit rod.

[0010] Furthermore, the locking assembly includes an installation cavity opened on the right side of the lifting plate and located above the supporting plate, and a special-shaped frame slidably connected to the installation cavity, the special-shaped frame is composed of a F-shaped plate and two L-shaped plates fixedly installed on the left side of the F-shaped plate and symmetrically arranged front and back, the raised end of the F-shaped plate slides through the installation cavity and is fixedly installed with an insert block, a fixing plate is fixedly installed on the inner corner side of the triangular frame, and two slots distributed up and down are opened on the left side of the fixing plate, and the upper and lower slots cooperate with the insert block when supporting the blank and separating from the blank, respectively.

[0011] Furthermore, a moving block that slides through the installation cavity is fixedly installed on the inner wall on the left side of the raised end of the L-shaped plate through two reset springs, and two front-to-back symmetrical toggle rods are rotatably installed between the upper and lower inner walls of the installation cavity. Toggle grooves are provided on the front and back sides of the moving block, and two ends of the toggle rod are respectively located in the toggle groove and between the L-shaped plate and the L-shaped plate. Sliding rods that slide through the installation cavity are fixedly installed on the left sides of the two L-shaped plates, and the left ends of the two sliding rods are jointly installed by the sleeve plate.

[0012] Furthermore, the drive guide assembly includes a screw rod rotatably installed on the front side of the bed and a movable seat threadedly connected to the outside of the screw rod, two guide rods slidably connected to the movable seat are fixedly installed on the front side of the bed, two guide rails symmetrical front and back are fixedly installed on the top of the bed, the movable seat is slidably connected to the top of the two guide rails, and a tool is arranged on the top of the movable seat.

[0013] Furthermore, the clamping assembly includes a pin seat slidably connected between two guide rails and a mounting cylinder fixedly mounted on the top of the pin seat, the mounting cylinder is threadedly connected to the pin, and a three-jaw chuck is rotatably mounted on the bed and cooperates with the pin to fix the blank and is located on the left side of the tool.

[0014] Furthermore, the control component includes two T-shaped slots which are symmetrically opened on the lifting plate and located above the support plate. A T-shaped slider is slidably connected in the T-shaped slot. An H-shaped pressure rod 1 is commonly installed on the outer sides of the two T-shaped sliders. Two wedge plates are symmetrically installed on the upper and lower sides of the pressure rod 1 close to the lifting plate. A conical block matching the wedge plate is fixedly installed on the left side of the moving block. The sleeve plate is slidably sleeved on the outer side of the conical block. When the control pulley approaches the blank, the lower wedge plate matches the conical block. When the control pulley is separated from the blank, the upper wedge plate matches the conical block. The pressure rod 1 is fixedly installed on the side away from the support plate with an L-shaped pressure rod 2.

[0015] Furthermore, a mounting ring is fixedly installed on the bed at the left side of the three-jaw chuck, and three pairs of circumferentially distributed fixing rods are fixedly installed on the right side of the mounting ring. The three pairs of fixing rods respectively cooperate with the three pressure rods, and the single pairs of fixing rods are symmetrical to each other.

[0016] Furthermore, a mounting sleeve is fixedly installed on the outer side of the ejector pin, and three pairs of fixing rods 2 are fixedly installed on the outer side of the mounting sleeve through an extension plate. The three pairs of fixing rods 2 are respectively matched with the three pressure rods 2, and the single pairs of fixing rods 2 are symmetrical to each other.

[0017] Furthermore, the reinforced guide unit includes two L-shaped guide rods fixedly installed on the left side of the triangular frame and symmetrically arranged front and back. Guide grooves are provided on the tops of the two guide rails, and the front and rear L-shaped guide rods are respectively slidably connected in the two guide grooves.

[0018] The beneficial effects of the present invention are: 1. In the present application, during the entire turning process, the three-jaw chuck, the ejector pin and the support assembly provide doubly support for the blank. During the entire turning process, the support assembly is always located a short distance to the left of the tool, and as the tool gradually moves toward the left side of the blank, the support assembly also moves synchronously to ensure that the cutting point of the tool is always located at the support assembly. This dynamic adjustment capability ensures the stability of the blank during the entire turning process, avoids deformation and vibration of the blank caused by the cantilever effect, thereby effectively avoiding the influence of the cantilever effect and greatly improving the machining accuracy.

[0019] 2. In the present application, the travel of the tool movement is utilized to make the support assembly, the locking assembly and the control assembly cooperate with each other to achieve auxiliary support for the blank during turning. When the turning is about to be completed, the support assembly is separated from the blank, and the tool turning stroke is automatically avoided, thereby improving the stability of the entire turning process. The automatic avoidance mechanism ensures that the pulley will not hinder the movement of the tool, avoiding the problem that the part of the pulley that contacts the blank cannot be turned, so that the tool can turn the entire blank at one time without the need for secondary clamping, thereby improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the lathe body part of the present invention.

[0022] Figure 3 It is a partial three-dimensional structural schematic diagram of the triangular frame, the first compression rod, the second compression rod, the three-jaw chuck and the mounting ring of the present invention.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of a return spring 1, a support plate, a pressure rod 1, a slot and a fixing plate of the present invention.

[0024] Figure 5 The present invention Figure 4 A partial enlarged view of part A.

[0025] Figure 6 It is a partial structural sectional view of a compression rod, a wedge plate, a conical block, a toggle block, a toggle rod, a slide rod and a sleeve plate of the present invention.

[0026] Figure 7 It is a schematic diagram of a three-dimensional structure of a part of the mounting ring and the fixing rod of the present invention.

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the mounting sleeve and the fixing rod of the present invention.

[0028] Fig. 9It is an exploded view of the three-dimensional structure of the lifting plate, the pressure rod 1, the installation cavity, the T-shaped slide groove and the T-shaped sliding block of the present invention.

[0029] In the figure: 1. lathe body; 101. bed; 102. guide assembly; 1021. screw rod; 1022. guide rod; 1023. moving seat; 1024. guide rail; 103. clamping assembly; 1031. ejector seat; 1032. mounting cylinder; 1033. ejector; 1034. three-jaw chuck; 104. tool; 2. blank; 3. follow-up auxiliary support unit; 4. strengthening guide unit; 401. L-shaped guide rod; 402. guide groove; 301. support assembly; 302. locking assembly; 303. control assembly; 304. triangular frame; 3011. return spring 1; 3012. mounting frame; 301 3. Pulley; 3014. Limit rod; 3015. Lifting plate; 3016. Support plate; 3020. Sleeve plate; 3021. Installation cavity; 3022. Special-shaped frame; 3023. Insert block; 3024. Fixed plate; 3025. Slot; 3026. Return spring 2; 3027. Moving block; 3028. Toggle rod; 3029. Slide rod; 3030. Pressure rod 2; 3031. T-shaped slide groove; 3032. T-shaped slider; 3033. Pressure rod 1; 3034. Wedge plate; 3035. Conical block; 3036. Installation ring; 3037. Fixed rod 1; 3038. Installation sleeve; 3039. Fixed rod 2. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is to enable those skilled in the art to better understand and implement the subject matter described herein. The functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the present specification. Various examples may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0031] See also Figure 1 and Figure 2In this embodiment, a turning processing device for bolt processing production is proposed, including a lathe body 1 composed of a bed 101, a guide assembly 102, a clamping assembly 103 for clamping a blank 2 and a tool 104 arranged on the top of the guide assembly 102. The guide assembly 102 and the clamping assembly 103 are both arranged on the bed 101. A follow-up auxiliary support unit 3 and a reinforcement guide unit 4 are arranged on the top of the bed 101. The follow-up auxiliary support unit 3 includes a triangular frame 304 that moves with the guide assembly 102, a support assembly 301 arranged on the triangular frame 304, a locking assembly 302 for locking the support assembly 301 and a control assembly 303 for controlling the locking assembly 302. The support assembly 301, the locking assembly 302 and the control assembly 303 are all provided in three and distributed in a triangle.

[0032] See also Figure 1 and Figure 2 The driving guide assembly 102 includes a screw rod 1021 rotatably mounted on the front side of the bed 101 and a movable seat 1023 threadedly connected to the outside of the screw rod 1021, two guide rods 1022 slidably connected to the movable seat 1023 are fixedly mounted on the front side of the bed 101, two guide rails 1024 symmetrical front and rear are fixedly mounted on the top of the bed 101, the movable seat 1023 is slidably connected to the top of the two guide rails 1024, and a tool 104 is arranged on the top of the movable seat 1023.

[0033] See also Figure 1 and Figure 2 The clamping assembly 103 includes a pin seat 1031 slidably connected between two guide rails 1024 and a mounting cylinder 1032 fixedly mounted on the top of the pin seat 1031. The mounting cylinder 1032 is internally threaded with a pin 1033. The pin 1033 consists of a threaded section and a rotating section rotatably mounted on the left end of the threaded section. A turntable is provided at the right end of the threaded section, and the left end of the rotating section is in the shape of a conical pin. A three-jaw chuck 1034 is rotatably mounted on the bed 101 and cooperates with the pin 1033 to fix the blank 2 and is located on the left side of the tool 104. The three-jaw chuck 1034 consists of a chuck body and jaws.

[0034] See also Figure 1 and Figure 2 The reinforcing guide unit 4 includes two L-shaped guide rods 401 fixedly installed on the left side of the triangular frame 304 and symmetrically arranged front and back. The tops of the two guide rails 1024 are provided with guide grooves 402, and the front and rear L-shaped guide rods 401 are respectively slidably connected in the two guide grooves 402.

[0035] When in use, the left end of the blank 2 is first clamped by the claws on the three-jaw chuck 1034, and then the turntable at the right end of the threaded segment of the ejector pin 1033 is rotated to drive the threaded segment of the ejector pin 1033 to move leftward in the mounting tube 1032 and drive the rotating segment to support the right end of the blank 2 (a center hole is pre-processed at the right end of the blank before processing, and the ejector pin is inserted into the center hole to support the blank), thereby fixing the blank 2, and then the screw rod 1021 is driven to rotate by an external power supply, thereby driving the moving screw rod 1021 threadedly connected to the screw rod 1021. The seat 1023 moves rightward to the right end of the blank 2 under the guidance of the guide rod 1022 and the guide rail 1024, and then controls the tool 104 to move rightward and press against the right end face of the blank 2 to wait for cutting. At the same time, in the process of the moving seat 1023 moving rightward, it will also drive the triangular frame 304 to move rightward synchronously, thereby driving the support assembly 301 and the locking assembly 302 to move rightward synchronously. As the triangular frame 304 moves, the locking assembly 302 cooperates with the control assembly 303 to drive the support assembly 301 to press and assist in supporting the blank 2.

[0036] It should be noted that during the movement of the triangular frame 304, the L-shaped guide rod 401 will drive the L-shaped guide groove 402 to slide, thereby further guiding the triangular frame 304, ensuring that the triangular frame 304 always remains on the correct track during the movement, and at the same time reinforces the triangular frame 304. By cooperating with the guide groove 402, the L-shaped guide rod 401 can effectively limit the lateral and longitudinal displacement of the triangular frame 304, avoiding the position offset of the triangular frame 304 caused by external vibration or cutting force, thereby ensuring that the support center of the support assembly 301 is always aligned with the center of the blank 2, avoiding the problem of blank 2 offset caused by the offset of the support assembly 301.

[0037] After the blank 2 is clamped and fixed by the clamping claws and the ejector pin 1033 on the three-jaw chuck 1034 and the blank 2 is pressed and auxiliary supported by the support assembly 301, the three-jaw chuck 1034 is controlled to rotate at a high speed by an external power supply, thereby driving the blank 2 to rotate at a high speed under the support of the ejector pin 1033, and then the movable seat 1023 is controlled to move to the left by the external power supply, driving the tool 104 to move to the left to turn the blank 2. As the tool 104 continues to move and turn, when the triangular frame 304 is about to approach the chuck, the locking assembly 302 cooperates with the control assembly 303 to drive the support assembly 301 to release the pressing and auxiliary support for the blank 2 and move to the outside of the chuck body part (such as Figure 3As shown in the figure), the tool 104 automatically avoids the turning stroke of the tool 104, and then the tool 104 continues to move a short distance to the left to turn the entire blank 2, and the blank 2 is turned into the diameter required for the bolt rod, and the part of the blank 2 that contacts the claw is the head of the bolt. The automatic avoidance mechanism ensures that the support component 301 will not hinder the movement of the tool 104, avoiding the problem that the part of the support component 301 that contacts the blank 2 cannot be turned, so that the tool 104 can turn the entire blank 2 at one time, thereby improving the processing efficiency. During the entire turning process, the three-jaw chuck 1034, the ejector pin 1033 and the support component 301 provide dual support for the blank 2. When the tool 104 starts turning from the right end of the blank 2, the support component 301 is located at the right half of the entire blank 2. At this time, the tool 104 is located between the support component 301 and the ejector pin 1033. Component 301 and ejector pin 1033 provide stable support for the right half of the blank 2. The blank 2 has high stability and the cutting force is evenly distributed. Therefore, the section of the blank 2 between the support component 301 and the ejector pin 1033 will not have a cantilever effect during high-speed rotation due to the support of the support component 301 and the ejector pin 1033, and the processing accuracy and surface quality can be guaranteed. Then, as the tool 104 gradually moves to the left side of the blank 2, the support component 301 is always located on the left side of the tool 104 to provide support for the blank 2, that is, the cutting point of the tool 104 is always located at the support component 301, avoiding the influence of the cantilever effect, ensuring the stability and processing accuracy of the blank 2, and as the cutting continues, the rigidity and mass distribution of the blank 2 change, and the blank 2 on the right side of the tool 104 has been cut to a smaller diameter, further avoiding the influence of the cantilever effect.

[0038] See also Figure 1 , Figure 3 and Figure 4 The support assembly 301 includes a support plate 3016 fixedly installed on the inner wall of the triangular frame 304 and two return springs 3011 fixedly installed on the side of the support plate 3016 away from the inner corner of the corresponding triangular frame 304. The other ends of the two return springs 3011 are jointly installed with a mounting frame 3012. The side of the mounting frame 3012 away from the return spring 3011 is an arc surface and a plurality of pulleys 3013 are rotatably installed. The side of the mounting frame 3012 away from the pulley 3013 is fixedly installed with a lifting plate 3015 that slides through the support plate 3016, and the locking assembly 302 is arranged on the lifting plate 3015.

[0039] See also Figure 1 , Figure 3 and Figure 4The support assembly 301 also includes two limit rods 3014 which are symmetrically installed on the top of the mounting frame 3012 and slide through the support plate 3016. Two return springs 3011 are respectively mounted on the outside of the front and rear limit rods 3014, and a limit plate is provided on the top of the limit rod 3014.

[0040] When in use, in the initial state, the lifting plate 3015 is locked, the three mounting brackets 3012 are in a separated state, and the return spring 1 3011 is compressed (such as Figure 3 As shown in the figure, while controlling the tool 104 to move to the right to hold the right end face of the blank 2 and waiting for cutting, the moving seat 1023 moves to the right and also drives the triangular frame 304 to move to the right synchronously, thereby driving the supporting assembly 301 and the locking assembly 302 to move to the right synchronously. As the triangular frame 304 moves, the locking assembly 302 cooperates with the control assembly 303 to release the locking of the lifting plate 3015, and the pressure on the reset spring 1 3011 is reduced, thereby resetting, driving the lifting plate 3015 to move closer to the side of the blank 2, and then driving the mounting frame 3012 and the pulley 3013 to move closer to the side of the blank 2, so that the pulleys 3013 on the three mounting frames 3012 are synchronously close to each other, and the blank 2 is pressed and auxiliary supported. At the same time, the locking assembly 302 locks the lifting plate 3015 again at this time, thereby fixing the position of the mounting frame 3012, thereby providing stable support for the blank 2.

[0041] When the tool 104 moves to the left to perform turning on the blank 2, the pulley 3013 provides auxiliary support for the blank 2, and as the tool 104 continues to move and turn, when the triangular frame 304 is about to approach the chuck, the locking assembly 302 cooperates with the control assembly 303 to first release the locking of the lifting plate 3015, and then drive the mounting frame 3012 and the pulley 3013 to move away from the blank 2 and compress the return spring 1 3011. At the same time, the lifting plate 3015 moves synchronously, so that the three mounting frames 3012 are synchronously away from the blank 2, and further the pulley 3013 releases the auxiliary support for the pressing of the blank 2 and moves to the outside of the chuck body part (such as the claw protruding from the outside of the chuck body). Figure 3 As shown), at this time, the locking assembly 302 locks the lifting plate 3015 again, thereby automatically avoiding the turning stroke of the tool 104, and then the entire blank 2 can be turned.

[0042] See also Figure 1 , Figure 3 , Figure 5 , Figure 6 and Fig. 9The locking assembly 302 includes an installation cavity 3021 opened on the right side of the lifting plate 3015 and located above the supporting plate 3016, and a special-shaped frame 3022 slidably connected to the installation cavity 3021. The special-shaped frame 3022 is composed of a F-shaped plate and two L-shaped plates fixedly installed on the left side of the F-shaped plate and symmetrically arranged front and back. The raised end of the F-shaped plate slides through the installation cavity 3021 and is fixedly installed with an insert block 3023. A fixing plate 3024 is fixedly installed on the inner corner side of the triangular frame 304. Two slots 3025 distributed up and down are opened on the left side of the fixing plate 3024. The upper and lower slots 3025 cooperate with the insert block 3023 when supporting the blank 2 and when detaching from the blank 2, respectively.

[0043] See also Figure 1 , Figure 3 , Figure 5 , Figure 6 and Fig. 9 A moving block 3027 that slides through the installation cavity 3021 is fixedly installed on the inner wall on the left side of the raised end of the L-shaped plate through a second return spring 3026, and two toggle rods 3028 that are symmetrical front and back are rotatably installed between the upper and lower inner walls of the installation cavity 3021. Toggle grooves are provided on the front and back sides of the moving block 3027, and the two ends of the toggle rod 3028 are respectively located in the toggle groove and between the L-shaped plate and the L-shaped plate. Slide rods 3029 that slide through the installation cavity 3021 are fixedly installed on the left sides of the two L-shaped plates, and the left ends of the two slide rods 3029 are jointly installed by the sleeve plate 3020.

[0044] See also Figure 1 , Figure 4 , Figure 7 and Figure 8 The control assembly 303 includes two T-shaped slots 3031 symmetrically arranged on the lifting plate 3015 and located above the support plate 3016. A T-shaped slider 3032 is slidably connected in the T-shaped slots 3031. An H-shaped pressure rod 3033 is installed on the outer sides of the two T-shaped sliders 3032. Two wedge plates 3034 are symmetrically installed on the upper and lower sides of the pressure rod 3033 near the lifting plate 3015. The left side of the moving block 3027 is fixedly installed There is a conical block 3035 that cooperates with the wedge plate 3034, and the sleeve plate 3020 is slidably mounted on the outside of the conical block 3035. When the control pulley 3013 approaches the blank 2, the wedge plate 3034 at the bottom cooperates with the conical block 3035. When the control pulley 3013 is separated from the blank 2, the wedge plate 3034 at the top cooperates with the conical block 3035. The compression rod 1 3033 is fixedly installed with an L-shaped compression rod 2 3030 on the side away from the support plate 3016.

[0045] See also Figure 2 , Figure 4 , Figure 7 and Figure 8A mounting ring 3036 is fixedly installed on the bed 101 at the left side of the three-jaw chuck 1034, and three pairs of circumferentially distributed fixing rods 3037 are fixedly installed on the right side of the mounting ring 3036. The three pairs of fixing rods 3037 are respectively matched with the three pressure rods 3033, and the single pairs of fixing rods 3037 are symmetrical to each other. A mounting sleeve 3038 is fixedly installed on the outer side of the ejector pin 1033, and three pairs of fixing rods 2 3039 are fixedly installed on the outer side of the mounting sleeve 3038 through an extension plate. The three pairs of fixing rods 2 3039 are respectively matched with the three pressure rods 2 3030, and the single pairs of fixing rods 2 3039 are symmetrical to each other.

[0046] When in use, as the triangular frame 304 moves closer to the ejector pin 1033, the second compression rod 3030 will be driven to move rightwards and close to the second fixed rod 3039 until it contacts the second fixed rod 3039. Then, the triangular frame 304 continues to move, which will drive the second compression rod 3030 to squeeze the second fixed rod 3039, so that the second compression rod 3030 moves closer to the blank 2, thereby driving the first compression rod 3033 to move synchronously, so that the T-shaped slider 3032 slides downward along the T-shaped slide groove 3031, thereby driving the wedge above The L-shaped plate 3034 moves downward and squeezes the conical block 3035, driving the conical block 3035 to move rightward, thereby driving the moving block 3027 to move rightward and compressing the return spring 2 3026. At the same time, the moving block 3027 also squeezes one end of the toggle rod 3028 located in the toggle groove during the movement to the right, driving the toggle rod 3028 to rotate with its rotation center, thereby driving the end of the toggle rod 3028 located between the L-shaped plate and the four-shaped plate to toggle the L-shaped plate to the left, driving the entire special-shaped frame 3022 to move leftward, and then driving the plug block 302 3 is pulled out from the slot 3025 at the top to release the locking of the lifting plate 3015. At this time, the T-shaped slider 3032 moves to the bottom end of the T-shaped slot 3031, and the pressure on the return spring 1 3011 disappears, thereby returning to the original position, thereby driving the lifting plate 3015 to move closer to the blank 2, so that the pulleys 3013 on the three mounting frames 3012 are synchronously close to each other, and the blank 2 is pressed and supported. At the same time, when the insert block 3023 moves down to the slot 3025 at the bottom, the return spring 2 3026 returns to the original position and drives the lifting plate 3015 to move closer to the blank 2. The moving block 3027 moves to the left, thereby squeezing one end of the toggle rod 3028 located in the toggle groove to the left, driving the toggle rod 3028 to rotate about its rotation center, thereby driving the end of the toggle rod 3028 located between the L-shaped plate and the four-shaped plate to push the L-shaped plate to the right, driving the entire special-shaped frame 3022 to move to the right, and then driving the insertion block 3023 to be inserted into the slot 3025 below, and again locking the lifting plate 3015, thereby fixing the position of the mounting frame 3012, thereby providing stable support for the blank 2.

[0047] As the triangular frame 304 moves closer to the three-jaw chuck 1034, it will drive the pressure rod 1 3033 to move synchronously to the left and close to the fixed rod 1 3037 until it contacts the fixed rod 1 3037. Then the triangular frame 304 continues to move to drive the pressure rod 1 3033 to squeeze the fixed rod 1 3037, so that the pressure rod 1 3033 moves away from the blank 2, so that the T-shaped slider 3032 slides upward along the T-shaped slide groove 3031, and then drives the wedge plate 3034 below to move upward and squeeze the conical block 3035, driving the conical block 3035 to move to the right, thereby driving the moving block 3027 to move to the right and compress the return spring 2 3026. At the same time, the moving block 3027 moves to the right. The cam 3032 is pressed against the top of the T-shaped slot 3031, and the triangular frame 304 continues to move to the left, driving the pressure rod 3033 to continue to squeeze the fixed rod 3037, so that the pressure rod 3033 drives the lifting plate 3015 to move away from the blank 2, so that the sliding blocks 3023 on the three mounting frames 3012 are pulled out of the slot 3025 at the top. The wheel 3013 moves away synchronously, releasing the auxiliary support for pressing the blank 2. At the same time, when the insert block 3023 moves down to the slot 3025 located above, the triangular frame 304 continues to move, driving the insert block 3023 to cross the slot 3025 located above, and then removes the processed bolt from the three-jaw chuck 1034. After removal, replace the new blank 2. After the replacement is completed, the tool 104 is controlled to move to the right, so that the triangular frame 304 moves to the right synchronously and quickly, so that the pressure rod 1 3033 is separated from the fixed rod 1 3037. At this time, the pressure on the reset spring 1 3011 disappears and resets, driving the lifting plate 3015 to move downward, so that the insert block 3023 moves downward synchronously. When the insert block 30 When the second cam 3023 moves down to the slot 3025 located at the top, the reset spring 3026 resets and drives the moving block 3027 to move leftward, thereby squeezing the end of the toggle rod 3028 located in the toggle slot to the left, driving the toggle rod 3028 to rotate about its rotation center, thereby driving the end of the toggle rod 3028 located between the L-shaped plate and the shaped plate to toggle the L-shaped plate to the right, driving the entire special-shaped frame 3022 to move rightward, and then driving the insert block 3023 to be inserted into the slot 3025 below, and the lifting plate 3015 is clamped and locked again, thereby fixing the position of the mounting frame 3012, so that the pulley 3013 releases the auxiliary support for the clamping of the blank 2 and moves to the outside of the chuck body part (such as the outer wall of the chuck body) where the claw protrudes Figure 3 As shown), the turning stroke of the tool 104 is automatically avoided, so that the entire blank 2 can be turned.

[0048] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A turning device for bolt production, characterized in that: include: A lathe body (1) is composed of a bed (101), a guide assembly (102), a clamping assembly (103) for clamping a blank (2), and a tool (104) arranged on the top of the guide assembly (102); the guide assembly (102) and the clamping assembly (103) are both arranged on the bed (101); a follow-up auxiliary support unit (3) and a reinforcement guide unit (4) are arranged on the top of the bed (101); the follow-up auxiliary support unit (3) comprises a triangular frame (304) that moves with the guide assembly (102), a support assembly (301) arranged on the triangular frame (304), a locking assembly (302) for locking the support assembly (301), and a control assembly (303) for controlling the locking assembly (302); the support assembly (301), the locking assembly (302), and the control assembly (303) are all arranged in three and distributed in a triangle; The support assembly (301) comprises a support plate (3016) fixedly mounted on the inner wall of the triangular frame (304) and two return springs (3011) fixedly mounted on the side of the support plate (3016) away from the inner corner of the corresponding triangular frame (304); a mounting frame (3012) is mounted on the other ends of the two return springs (3011); a side of the mounting frame (3012) away from the return spring (3011) is an arc surface and is rotatably mounted with a plurality of pulleys (3013); a lifting plate (3015) that slides through the support plate (3016) is fixedly mounted on the side of the mounting frame (3012) away from the pulleys (3013); and the locking assembly (302) is arranged on the lifting plate (3015); The guide assembly (102) drives the tool (104) to move from the right end of the blank (2) to the left for turning, and the triangular frame (304) moves accordingly. The locking assembly (302) locks and fixes the pulley (3013) to press the blank (2). When turning starts and when turning is about to be completed, the control assembly (303) controls the locking assembly (302) to drive the pulley (3013) to press and release the blank (2).

2. A turning device for bolt production according to claim 1, characterized in that: The support assembly (301) further comprises two limit rods (3014) which are symmetrically mounted on the top of the mounting frame (3012) and slide through the support plate (3016); two return springs (3011) are respectively sleeved on the outsides of the two limit rods (3014) at the front and rear ends; and a limit plate is provided at the top of the limit rod (3014).

3. A turning device for bolt production according to claim 1, characterized in that: The locking assembly (302) comprises an installation cavity (3021) opened on the right side of the lifting plate (3015) and located above the support plate (3016), and a special-shaped frame (3022) slidably connected in the installation cavity (3021), the special-shaped frame (3022) comprising a shaped plate and two L-shaped plates fixedly installed on the left side of the shaped plate and arranged symmetrically in the front and back, the raised end of the shaped plate slides through the installation cavity (3021) and is fixedly installed with an insert block (3023), the inner corner side of the triangular frame (304) is fixedly installed with a fixing plate (3024), and the left side of the fixing plate (3024) is provided with two slots (3025) distributed in upper and lower directions, and the upper and lower slots (3025) respectively cooperate with the insert block (3023) when supporting the blank (2) and when separating from the blank (2).

4. A turning device for bolt production according to claim 3, characterized in that: A moving block (3027) that slides through the installation cavity (3021) is fixedly installed on the inner wall on the left side of the raised end of the L-shaped plate via a second return spring (3026); two toggle rods (3028) that are symmetrical in front and back are rotatably installed between the upper and lower inner walls of the installation cavity (3021); toggle grooves are provided on the front and back sides of the moving block (3027); two ends of the toggle rod (3028) are respectively located in the toggle groove and between the L-shaped plate and the L-shaped plate; a slide rod (3029) that slides through the installation cavity (3021) is fixedly installed on the left sides of the two L-shaped plates; and the left ends of the two slide rods (3029) are jointly installed by the sleeve plate (3020).

5. A turning device for bolt production according to claim 4, characterized in that: The driving guide assembly (102) comprises a screw rod (1021) rotatably mounted on the front side of a bed (101) and a movable seat (1023) threadedly connected to the outside of the screw rod (1021); two guide rods (1022) slidably connected to the movable seat (1023) are fixedly mounted on the front side of the bed (101); two guide rails (1024) symmetrically arranged front and rear are fixedly mounted on the top of the bed (101); the movable seat (1023) is slidably connected to the top of the two guide rails (1024); and a tool (104) is arranged on the top of the movable seat (1023).

6. A turning device for bolt production according to claim 5, characterized in that: The clamping assembly (103) comprises an ejector seat (1031) slidably connected between two guide rails (1024) and a mounting cylinder (1032) fixedly mounted on the top of the ejector seat (1031); the mounting cylinder (1032) is internally threadedly connected with an ejector (1033); and a three-jaw chuck (1034) is rotatably mounted on the bed (101) and is matched with the ejector (1033) to fix the blank (2) and is located on the left side of the tool (104).

7. A turning device for bolt production according to claim 6, characterized in that: The control assembly (303) comprises two T-shaped slide grooves (3031) symmetrically arranged on the lifting plate (3015) and located above the support plate (3016), a T-shaped slider (3032) being slidably connected in the T-shaped slide grooves (3031), an H-shaped pressure rod (3033) being commonly installed on the outer sides of the two T-shaped sliders (3032), two wedge plates (3034) being symmetrically installed on the upper and lower sides of the pressure rod (3033) close to the lifting plate (3015), and a wedge plate (3034) being fixedly installed on the left side of the moving block (3027) The sleeve plate (3020) is slidably mounted on the outer side of the conical block (3035); when the control pulley (3013) approaches the blank (2), the lower wedge plate (3034) cooperates with the conical block (3035); when the control pulley (3013) is separated from the blank (2), the upper wedge plate (3034) cooperates with the conical block (3035); and a second L-shaped compression rod (3030) is fixedly installed on the side of the compression rod (3033) away from the support plate (3016).

8. A turning device for bolt production according to claim 7, characterized in that: A mounting ring (3036) is fixedly installed on the bed (101) at a position on the left side of the three-jaw chuck (1034), and three pairs of circumferentially distributed fixing rods (3037) are fixedly installed on the right side of the mounting ring (3036). The three pairs of fixing rods (3037) are respectively matched with the three pressure rods (3033), and the single pairs of fixing rods (3037) are symmetrical to each other.

9. A turning device for bolt production according to claim 7, characterized in that: A mounting sleeve (3038) is fixedly mounted on the outer side of the ejector pin (1033), and three pairs of fixing rods (3039) are fixedly mounted on the outer side of the mounting sleeve (3038) via an extension plate. The three pairs of fixing rods (3039) are respectively matched with the three pressure rods (3030), and the single pairs of fixing rods (3039) are symmetrical to each other.

10. The turning device for bolt production according to claim 1, characterized in that: The reinforcing guide unit (4) comprises two L-shaped guide rods (401) fixedly mounted on the left side of the triangular frame (304) and symmetrically arranged front and rear. The tops of the two guide rails (1024) are each provided with a guide groove (402), and the front and rear L-shaped guide rods (401) are respectively slidably connected in the two guide grooves (402).

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