Bar processing machine tool

Abstract

The utility model provides a bar processing machine tool, and belongs to the technical field of machine tools. The technical problem that an existing bar machining machine tool is single in function is solved. The bar processing machine tool comprises a rack and a material preparation seat, a shaft seat is fixed on the rack, a main shaft is rotationally connected to the shaft seat, the material preparation seat is located at one end of the feeding end of the main shaft, and a movable table capable of freely moving in the X-axis direction and the Y-axis direction is arranged at the position, located at the processing end of the main shaft, of the rack; the main shaft is a hollow pipe, pneumatic chucks are arranged at the two ends of the main shaft, and the centers of the two pneumatic chucks are located on the axis of the main shaft. A feeding table and a discharging gripper are arranged on the material preparation seat, and the feeding table and the discharging gripper can alternately move to the position aligned with the main shaft; a plurality of machining tools are sequentially fixed to the moving table in the Y-axis direction, a bolt feeding machine is further fixed to the moving table, and a bolt feeding machine is arranged on the side, located on the main shaft, of the rack. The automatic feeding and discharging device has the advantages that a plurality of bar machining procedures can be achieved at a time, and feeding and discharging can be achieved automatically.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tools and relates to a bar processing machine tool. Background Art

[0002] Bar processing has high precision requirements. For example, a billiard cue is composed of multiple sections of rods spliced together, and the multiple sections of rods are connected by bolts. When installing the bolts, it is required to be concentric with the billiard cue. If not concentric, the billiard cue composed of multiple sections of rods will be bent, and the accuracy of hitting the ball cannot be guaranteed. At present, the machine tools for bars such as billiard cues with long lengths and high processing precision requirements have single functions and can only complete one process at a time. Multiple machine tools with different functions need to process sequentially, which leads to the gradual accumulation of errors, resulting in large errors and poor quality of the final products. For example, a chuck type automatic rod repairer disclosed in Chinese patent literature [Application No. 201520083454.X], etc. Moreover, the automation degree of such machine tools is low, the production efficiency is low, special personnel are required for operation, and the labor cost is also high. Content of the Utility Model

[0003] The purpose of the utility model is to provide a bar processing machine tool aiming at the above problems existing in the prior art. The technical problem solved by the utility model is that it can complete multiple bar processing processes at one time and can automatically load and unload materials.

[0004] The purpose of the utility model can be achieved by the following technical solutions:

[0005] A bar processing machine tool includes a machine frame and a stock preparation seat. A shaft seat is fixed on the machine frame, and a main shaft is rotatably connected to the shaft seat. One end of the main shaft is a feeding end, and the other end of the main shaft is a processing end. The stock preparation seat is located at one end of the feeding end of the main shaft. A moving table that can freely move in the X-axis and Y-axis directions is provided on the machine frame at the processing end of the main shaft. It is characterized in that the main shaft is a hollow tube, and pneumatic chucks are provided at both ends of the main shaft. The centers of the two pneumatic chucks are located on the axis of the main shaft. An upper feeding table and a blanking gripper are provided on the stock preparation seat. The upper feeding table and the blanking gripper can alternately move to positions aligned with the main shaft. An upper feeding mechanism capable of moving the bar on the upper feeding table towards the main shaft is provided on the upper feeding table, and the blanking gripper can extract the bar on the main shaft. A number of processing tools are sequentially fixed on the moving table along the Y-axis direction, and a bolt feeding machine is also fixed on the moving table. A bolt feeding machine is provided on the machine frame on one side of the main shaft. The moving table can move the bolt feeding machine to positions aligned with the bolt feeding machine and the main shaft respectively.

[0006] The stock preparation seat is used to store the bar stock to be processed. The hollow main shaft allows the bar stock to pass through. The bar stock is fixed by pneumatic chucks located at both ends of the main shaft. Specifically, during processing, the bar stock in the stock preparation seat enters the loading table. At this time, the loading table is aligned with the main shaft. The bar stock is moved to the main shaft through the loading mechanism. After reaching the position, the bar stock is accurately fixed by two pneumatic chucks. The end of the bar stock to be processed extends out of the processing end of the main shaft. The moving table sequentially performs operations such as turning, drilling, and tapping on the end of the bar stock through multiple processing tools according to the set program. After completion, the moving table aligns the bolt loading machine with the bolt feeder. The bolt feeder transports the bolts to the bolt loading machine. Then the moving table aligns the bolt loading machine with the main shaft, and the bolts on the bolt loading machine are installed on the end of the bar stock. After completion, the unloading gripper extracts the bar stock on the main shaft to complete the processing. Through the hollow main shaft, the loading and unloading of the bar stock can be realized at the same end of the main shaft, reducing the overall length of the machine tool, making the structure more compact, and reducing the occupied area. The two ends of the bar stock are respectively clamped and centered by two pneumatic chucks, which can ensure the concentricity of the bar stock and the main shaft for a longer bar stock, ensuring the processing accuracy. By setting a bolt loading machine and multiple processing tools on the moving table, multiple processes of the bar stock and the installation of bolts can be realized at one time, improving the production efficiency and further ensuring the processing accuracy without repeated centering.

[0007] In the above bar stock processing machine tool, a central tube is also inserted into the main shaft. The two ends of the central tube respectively penetrate out of the main shaft. Positioning bushings are detachably connected to the two ends of the central tube respectively. The inner hole of the positioning bushing is a tapered hole. The inner hole of the positioning bushing is coaxial with the main shaft, and the end with a smaller inner diameter of the inner hole of the positioning bushing faces outward. The positioning bushings have different models. The difference between different models of positioning bushings lies in the size of the inner diameter of the outer-facing inner hole. The inner diameter of the outer-facing inner hole of the positioning bushing is slightly larger than the diameter of the corresponding bar stock. During processing, the bar stock is inserted into the central tube. Through the outer-facing inner holes of the two positioning bushings, the centers of the two ends of the bar stock approach the axis of the main shaft, realizing the primary positioning of the bar stock, making it easier for the pneumatic chuck to clamp the bar stock, and enabling automatic feeding of the bar stock.

[0008] In the above bar stock processing machine tool, the bolt feeder includes a feeding chute and a fixing structure that can fix the bolts at the end of the feeding channel. The bolt loading machine includes a driving motor and a connecting head fixed on the motor shaft of the driving motor. The driving motor is installed on the moving table. When the driving motor is aligned with the feeding channel, the connecting head can approach the end of the feeding channel to be screwed and fixed to the bolts located at the end of the feeding channel. When the driving motor is aligned with the main shaft, the connecting head can approach the main shaft to screw the bolts onto the bar stock and then separate from the bolts.

[0009] The bolts to be assembled are fed by a bolt feeder. During use, the assembled bolts are transferred to the end of the feeding chute, and the bolts are pressed and positioned by a pressing structure. The moving table moves the bolt loader to a position opposite to the bolt feeder. The connecting head rotates through a driving motor, and the connecting head moves towards the bolt at the end of the feeding chute. The fixed bolt is screwed and fixed with the connecting head. After completion, the connecting head retracts. The moving table moves the bolt loader to a position opposite to the main shaft, the connecting head moves towards the main shaft, a screw hole is provided on the bar stock, and the connecting head screws the bolt thereon into the screw hole of the bar stock. After the bolt is installed in place, the bolt rotates in reverse relative to the connecting head to realize the separation of the bolt and the connecting head, and the bolt on the connecting head is installed on the bar stock.

[0010] In the above-mentioned bar stock processing machine tool, the fixing structure includes a pressing cylinder and a pressing strip. The pressing cylinder is fixedly installed above the end of the feeding chute. The pressing cylinder is arranged downward. The pressing strip is fixed on the cylinder rod of the pressing cylinder. The pressing cylinder can push the pressing strip towards the feeding chute. When the bolt is conveyed to the end of the feeding chute, the pressing cylinder pushes the pressing strip towards the feeding chute to clamp the bolt between the pressing strip and the feeding chute, so that the bolt is fixed at the end of the feeding chute.

[0011] In the above-mentioned bar stock processing machine tool, the bolt feeder further includes a machine case, a stepped feeder II fixed in the machine case, and a pushing cylinder. The stepped feeder II includes a plurality of push plates II arranged in a stepped manner. When the uppermost push plate II is at a high position, it is aligned with the feeding chute. The pushing cylinder is fixed on the machine case and is located at the starting end of the feeding chute. The bolts are sequentially sent to the feeding chute one by one through the stepped feeder II, and then the bolts are pushed to the end of the feeding chute by the cylinder rod of the pushing cylinder; the push plate II of the stepped feeder II is inclined, and when the uppermost push plate II is at a high position, the bolts thereon will roll into the feeding channel.

[0012] In the above-mentioned bar stock processing machine tool, a stepped feeder I is installed on the stock preparation seat. The stepped feeder I includes a plurality of push plates I arranged in a stepped manner. The uppermost push plate I is the end push plate I. The loading table is fixed on the lower side of the inclined direction of the end push plate I. When the end push plate I moves to a high position, the tabletop of the loading table is aligned with the upper end face of the end push plate I. A blanking support is fixedly connected to the end push plate I. A blanking gripper located above the loading table is arranged on the blanking support along the inclined direction of the end push plate I. The displacement size of the up and down movement of the end push plate I is the same as the distance between the blanking gripper and the tabletop of the loading table.

[0013] The bar stock to be processed is successively lifted by the push plate 1 of the stepped feeder 1 to the end push plate 1, and the bar stock located on the end push plate 1 will roll onto the tabletop of the loading table; when the end push plate 1 is in the low position, the unloading gripper is aligned with the machining station of the machine tool, and the unloading gripper is in the unloading station. The unloading gripper grabs and unloads the bar stock that has been processed on the machine tool; after unloading, the push plate 1 moves up to the high position, and the end push plate 1 moves the loading table upward to align with the machining station of the machine tool. The bar stock on the tabletop of the loading table is moved to the machining station of the machine tool through the loading mechanism to complete the loading. After completion, the push plate 1 moves down; the loading table is located on the lower side of the inclined direction of the end push plate 1, which enables the bar stock on the upper end surface of the end push plate 1 to automatically roll onto the tabletop of the loading table; the loading table and the unloading support fixedly installed on the end push plate 1 are alternately aligned with the machining station of the machine tool when the end push plate 1 moves up and down, so as to realize the alternate loading and unloading of the bar stock.

[0014] In the above bar stock processing machine tool, the loading mechanism includes a loading cylinder and a loading push block. The loading cylinder is fixed on the side of the loading table, the loading push block is located on the tabletop of the loading table, the cylinder rod of the loading cylinder is fixedly connected with the loading push block, and the loading cylinder can push the loading block to move from the front end to the end of the loading table. The end push plate 1 transports the bar stock to the tabletop of the loading table. When the end push plate 1 moves up to the high position, the loading cylinder drives the loading push block to move from the front end to the end of the loading table, that is, to move the bar stock towards the machine tool side. The loading push block pushes the bar stock towards the machining station of the machine tool. After loading, the loading cylinder drives the loading push block to reset.

[0015] In the above bar stock processing machine tool, the unloading gripper includes an unloading cylinder and a clamping cylinder. The unloading cylinder is fixed on the unloading support, the cylinder body of the clamping cylinder is fixedly connected with the telescopic rod of the unloading cylinder, and the unloading cylinder can drive the clamping cylinder to move from the front end to the end of the loading table. Fixtures matching the bar stock are fixed on the two clamping hands of the clamping cylinder. The clamping and releasing of the bar stock are realized by the closing and opening of the two clamping hands of the clamping cylinder, and the unloading cylinder drives the clamping cylinder to move back and forth; during unloading, the end push plate 1 is in the low position. The unloading cylinder first moves the clamping cylinder to the end of the loading table. At this time, the clamping cylinder is aligned with the machining station of the machine tool. The clamping hands of the clamping cylinder close to grasp the end of the bar stock. After completion, the unloading cylinder moves the clamping hands to the front end of the loading table to complete the unloading.

[0016] In the above bar stock processing machine tool, a unloading guide plate is fixed on the unloading support. The unloading guide plate is located between the loading table and the unloading gripper. The unloading guide plate is inclined downward and the lower end of the unloading guide plate is located outside the stock preparation seat. After the unloading gripper completes the unloading of the bar stock, the bar stock is released and falls onto the unloading guide plate and rolls along the unloading guide plate into the cost collection box outside the stock preparation seat.

[0017] In the above-mentioned bar processing machine tool, the stock preparation base includes a stock bin bottom plate which is arranged obliquely downward. The stepped feeder 1 is located at the lower end of the stock bin bottom plate. When the uppermost push plate 1 is at the low position, its upper end face is aligned with the stock bin bottom plate. The bars to be processed are stacked on the stock bin bottom plate. The inclined stock bin bottom plate causes the bars to move towards the side of the stepped feeder 1. The push plate 1 successively lifts and conveys the bars onto the loading table.

[0018] Compared with the prior art, the present bar processing machine tool has the following advantages:

[0019] 1. The hollow main shaft and the stock preparation base located at the feeding end cooperate to achieve loading and unloading at the same end of the main shaft, reducing the overall length of the machine tool, making the structure more compact, reducing the occupied area, and at the same time realizing automatic loading and unloading, improving the efficiency and reducing the production cost.

[0020] 2. Both ends of the bar are clamped and centered by two pneumatic chucks. For bars with a longer length, it can ensure that the bar is concentric with the main shaft, guaranteeing the machining accuracy. And a bolt loading machine and multiple machining tools are arranged on the moving table, realizing the machining of multiple processes of the bar and the installation of bolts at one time, improving the production efficiency and further ensuring the machining accuracy without repeated centering. Description of the Drawings

[0021] Figure 1 is a three-dimensional structural schematic diagram of the bar processing machine tool.

[0022] Figure 2 is a three-dimensional structural schematic diagram of the bar processing machine tool with the stock preparation base omitted.

[0023] Figure 3 is a three-dimensional structural schematic diagram of the assembly of the shaft seat, the main shaft and the pneumatic chuck.

[0024] Figure 4 is a three-dimensional structural schematic diagram of the main shaft and related structures.

[0025] Figure 5 is a sectional structural schematic diagram when the main shaft and the center pipe are assembled.

[0026] Figure 6 is a three-dimensional structural schematic diagram of the stock preparation base.

[0027] Figure 7 is another three-dimensional structural schematic diagram of the stock preparation base.

[0028] Figure 8 is a sectional structural schematic diagram of the stock preparation base.

[0029] Figure 9 is a three-dimensional structural schematic diagram when the end push plate 1, the loading table and the loading gripper are assembled.

[0030] Figure 10 It is a three-dimensional structure schematic diagram of a bolt feeder.

[0031] Figure 11 is Figure 2 a partial enlarged view of part A in

[0032] Figure 12 It is a three-dimensional structure schematic diagram of a bolt loading machine.

[0033] In the figure, 1 is the frame; 11 is the cross slide; 12 is the moving table; 13 is the processing tool; 2 is the shaft seat; 21 is the limit rod; 22 is the limit surface; 3 is the main shaft; 3a is the feeding end; 3b is the processing end; 31 is the connecting ring part; 311 is the first flange; 32 is the second flange; 33 is the driven pulley; 331 is the transmission belt; 34 is the bearing; 35 is the oil seal; 36 is the central pipe; 361 is the step groove; 37 is the positioning bushing; 371 is the retaining edge; 4 is the pneumatic chuck; 5 is the stock preparation seat; 51 is the bottom plate of the bin; 511 is the fixing hole; 52 is the limit baffle; 53 is the connecting plate; 54 is the loading table; 541 is the baffle; 542 is the loading cylinder; 543 is the loading push block; 55 is the blanking support; 551 is the blanking gripper; 552 is the blanking cylinder; 553 is the clamping cylinder; 554 is the blanking guide plate; 6 is the first stepped feeder; 61 is the first push plate; 62 is the first end push plate; 7 is the bolt loading machine; 71 is the chassis; 72 is the second stepped feeder; 721 is the first push plate; 73 is the pushing cylinder; 74 is the feeding slideway; 741 is the channel groove; 75 is the pressing cylinder; 76 is the pressing strip; 8 is the bolt feeder; 81 is the driving motor; 82 is the connecting head; 821 is the connecting hole; 83 is the slide rail cylinder. Detailed implementation manners

[0034] The following are specific embodiments of the present invention and in combination with the attached drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0035] Embodiment 1

[0036] As Figures 1 to 12 shown, the bar processing machine tool includes a frame 1 and a stock preparation seat 5. A shaft seat 2 is fixed on the frame 1, and a main shaft 3 is rotatably connected to the shaft seat 2. One end of the main shaft 3 is the feeding end 3a, and the other end of the main shaft 3 is the processing end 3b. The stock preparation seat 5 is located at one end of the feeding end 3a of the main shaft 3. A moving table 12 that can move freely in the X-axis and Y-axis directions is provided on the frame 1 at the processing end 3b of the main shaft 3. The X-axis is the axial direction of the main shaft 3, and the Y-axis is perpendicular to the main shaft 3. A cross slide 11 is installed on the frame 1, and the moving table 12 is fixed on the cross slide 11.

[0037] The main shaft 3 is a hollow tube. Pneumatic chucks 4 are provided at both ends of the main shaft 3. The rotary cylinders of the two pneumatic chucks 4 are fixedly installed at both ends of the main shaft 3 respectively. The outer shell of the pneumatic chuck 4 is fixedly connected to the shaft seat 2. The centers of the two pneumatic chucks 4 are located on the axis of the main shaft 3. One end of the main shaft 3 is provided with a connecting ring portion 31. A first flange 311 is fixed to the outer end of the connecting ring portion 31. A second flange 32 is screwed to the other end of the main shaft 3. The rotary cylinders of the two pneumatic chucks 4 are respectively fixedly connected to the first flange 311 and the second flange 32. A limiting rod 21 is connected between the outer shells of the two pneumatic chucks 4. A limiting surface 22 is provided on the shaft seat 2 between the two pneumatic chucks 4. The limiting rod 21 abuts against the limiting surface 22 to circumferentially position the outer shells of the two pneumatic chucks 4. The pneumatic chuck 4 is a three-jaw pneumatic chuck, which is an existing structure. In this embodiment, a pneumatic chuck of model GXT-40 is adopted.

[0038] A central tube 36 is also inserted into the main shaft 3. The two ends of the central tube 36 respectively penetrate through the main shaft 3. Positioning bushings 37 are detachably connected to the two ends of the central tube 36 respectively. The inner hole of the positioning bushing 37 is a tapered hole. The inner hole of the positioning bushing 37 is coaxial with the main shaft 3. The end with a smaller inner diameter of the inner hole of the positioning bushing 37 faces outward. The inner diameter of the inner hole of the positioning bushing 37 facing inward is the same as the inner diameter of the central tube 36. In this embodiment, a section of bell mouth is provided at the outer end of the inner hole of the positioning bushing 37 at the feeding end 3a of the main shaft 3. The end with a larger diameter of the bell mouth faces outward. The section with a smaller diameter of the bell mouth is the end with a smaller inner diameter of the inner hole. The bell mouth can facilitate the bar stock to enter the positioning bushing 37. Step grooves 361 are opened on the inner sides of the two ends of the central tube 36. The inner end of the positioning bushing 37 is snapped into the step groove 361. The outer end of the positioning bushing 37 is provided with an outwardly turned retaining edge 371. The retaining edge 371 can abut against the end face of the central tube 36. The corresponding sized positioning bushing 37 is selected according to the diameters of both ends of the processed bar stock. The positioning bushing 37 can position the bar stock to a position close to the axis of the main shaft 3.

[0039] Mounting holes are opened on the shaft seat 2. The main shaft 3 passes through the mounting holes. Two bearings 34 are connected to the main shaft 3 at intervals. Both of the two bearings 34 are located within the mounting holes. Oil seals 35 are respectively fixed at both ends of the mounting holes. A driven pulley 33 is also fixed on the main shaft 3. A main motor is fixed on the shaft seat 2. A main pulley is fixed on the motor shaft of the main motor. The driven pulley 33 and the main pulley are connected by a transmission belt 331. The main motor drives the main shaft 3 to rotate through the transmission belt 331.

[0040] Furthermore, a loading table 54 and a blanking gripper 551 are provided on the stock preparation seat 5. The loading table 54 and the blanking gripper 551 can alternately move to positions aligned with the main shaft 3. A loading mechanism capable of moving the bar stock on the loading table 54 towards the main shaft 3 is provided on the loading table 54. The blanking gripper 551 can extract the bar stock on the main shaft 3.

[0041] A stepped feeder 6 is installed on the stock preparation base 5. The stepped feeder 6 includes a number of push plates 61 arranged in a stepped manner. The stock preparation base 5 includes a bin bottom plate 51 which is inclined downward. The stepped feeder 6 is located at the lower end of the bin bottom plate 51. When the uppermost surface of the lowermost push plate 61 is at a low position, it is aligned with the bin bottom plate 51. A limit baffle 52 is provided on one side of the front end of the bin bottom plate 51 located on the loading table 54. A number of fixing holes 511 for fixing the limit baffle 52 are provided along the front-back direction of the loading table 54 on the upper edge of the bin bottom plate. The bar stock is located on the bin bottom plate and one end of it abuts against the limit baffle 52, thereby defining the initial position of the bar stock entering the loading table 54. The uppermost push plate 61 is the end push plate 62. The loading table 54 is fixed on the lower side of the inclined direction of the end push plate 62. When the end push plate 62 moves to a high position, the surface of the loading table 54 is aligned with the uppermost surface of the end push plate 62. The stock preparation base 5 also includes connecting plates 53 located between adjacent push plates 61. The adjacent connecting plates 53 are arranged in a stepped manner. When the push plate 61 is at a low position, the uppermost surface of the push plate 61 is flush with the uppermost surface of the front connecting plate 53. When the push plate 61 is at a high position, the uppermost surface of the push plate 61 is flush with the uppermost surface of the rear connecting plate 53.

[0042] A baffle 541 is provided on one side of the loading table 54 away from the end push plate 62. The baffle 541 is higher than the surface of the loading table 54. The loading mechanism includes a loading cylinder 542 and a loading push block 543. The loading cylinder 542 is fixed on the side of the loading table 54. The loading push block 543 is located on the surface of the loading table 54. The cylinder rod of the loading cylinder 542 is fixedly connected to the loading push block 543. The loading cylinder 542 can push the loading block to move from the front end of the loading table 54 to the end. A sensor is provided at the end of the loading table 54 to determine the end position of the loading push block 543 to ensure the accuracy of the bar stock loading position. The end push plate 62 transports the bar stock to the surface of the loading table 54. When the end push plate 62 moves up to a high position, the loading cylinder 542 drives the loading push block 543 to move from the front end of the loading table 54 to the end, that is, to move the bar stock towards the machine tool side. The loading push block 543 pushes the bar stock towards the machining station of the machine tool. After the loading is completed, the loading cylinder 542 drives the loading push block 543 to reset.

[0043] The blanking support 55 is fixedly connected to the first end pushing plate 62. Along the inclined direction of the first end pushing plate 62 on the blanking support 55, there is a blanking gripper 551 located above the loading table 54. The blanking gripper 551 includes a blanking cylinder 552 and a clamping cylinder 553. The blanking cylinder 552 is fixed on the blanking support 55. The cylinder body of the clamping cylinder 553 is fixedly connected to the telescopic rod of the blanking cylinder 552. The blanking cylinder 552 can drive the clamping cylinder 553 to move from the front end of the loading table 54 towards the end. On the shaft seat 2, there is a sensor on one side of the feeding end 3a. This sensor can detect whether the bar stock has completed blanking. Fixtures matching the bar stock are fixed on the two clamping hands of the clamping cylinder 553. The clamping and releasing of the two clamping hands of the clamping cylinder 553 are used to achieve grasping and releasing. The blanking cylinder 552 drives the clamping cylinder 553 to move back and forth. During blanking, the first end pushing plate 62 is in the low position. The blanking cylinder 552 first moves the clamping cylinder 553 to the end of the loading table 54. At this time, the clamping cylinder 553 is aligned with the machining station of the machine tool. The clamping hands of the clamping cylinder 553 close to grasp the end of the bar stock. After completion, the blanking cylinder 552 moves the clamping hands to the front end of the loading table 54 to complete blanking.

[0044] The displacement magnitude of the up and down movement of the first end pushing plate 62 is the same as the distance between the blanking gripper 551 and the tabletop of the loading table 54, so that the loading table 54 and the blanking gripper 551 can alternately move to the position aligned with the main shaft 3. The blanking support 55 is fixed with a blanking guide plate 554. The blanking guide plate 554 is located between the loading table 54 and the blanking gripper 551. The blanking guide plate 554 is inclined downward and the lower end of the blanking guide plate 554 is located outside the stock preparation seat 5. After the blanking gripper 551 completes the blanking of the bar stock, it releases the bar stock. The bar stock falls onto the blanking guide plate 554 and rolls along the blanking guide plate 554 into the cost collection box outside the stock preparation seat 5.

[0045] The bar stock to be processed is successively lifted to the first end pushing plate 62 by the pushing plate 61 of the stepped feeder 6. The bar stock located on the first end pushing plate 62 will roll onto the tabletop of the loading table 54. When the first end pushing plate 62 is in the low position, the blanking gripper 551 is aligned with the machining station of the machine tool. The blanking gripper 551 is in the blanking station. The blanking gripper 551 grabs and blanks the bar stock that has been processed on the machine tool. After completion of blanking, the pushing plate 61 moves up to the high position. The first end pushing plate 62 moves the loading table 54 upward to be aligned with the machining station of the machine tool. The bar stock on the tabletop of the loading table 54 is moved to the machining station of the machine tool through the loading mechanism to complete loading. After completion, the pushing plate 61 moves down.

[0046] Further, a number of processing tools 13 are fixedly arranged on the mobile station 12 in sequence along the Y-axis direction. In this embodiment, the number of processing tools 13 includes a chamfering tool, a drill bit, a tapping head, and a turning tool, which respectively implement the processes of chamfering, drilling, tapping, and turning the end face; a bolt feeding machine 7 is also fixedly arranged on the mobile station 12, and a bolt feeder 8 is arranged on the frame 1 on one side of the main shaft 3. The mobile station 12 can move the bolt feeding machine 7 to positions aligned with the bolt feeder 8 and the main shaft 3 respectively.

[0047] Specifically, the bolt feeder 8 further includes a machine case 71, a stepped feeder two 72 fixedly arranged in the machine case 71, a pushing cylinder 73, a feeding chute 74, and a fixing structure capable of fixing the bolt at the end of the feeding channel. The stepped feeder two 72 includes a number of push plates two 721 arranged in a stepped manner. The feeding chute 74 is fixedly arranged at the upper end of the machine case 71. A channel groove 741 in a "V" shape is arranged on the feeding channel. When the uppermost push plate two 721 is at a high position, it is aligned with the feeding chute 74. The bolts are sequentially sent to the feeding chute 74 one by one through the stepped feeder two 72, and then the bolts are pushed to the end of the feeding chute 74 by the cylinder rod of the pushing cylinder 73; the push plates two 721 of the stepped feeder two 72 are inclined. When the uppermost push plate two 721 is at a high position, the bolts on it will roll into the feeding channel. The pushing cylinder 73 is fixedly arranged on the machine case 71 and is located at the starting end of the feeding chute 74. The fixing structure includes a pressing cylinder 75 and a pressing strip 76. The pressing cylinder 75 is fixedly installed above the end of the feeding chute 74. The pressing cylinder 75 is arranged downward. The pressing strip 76 is fixedly arranged on the cylinder rod of the pressing cylinder 75. The pressing cylinder 75 can push the pressing strip 76 to move towards the feeding chute 74.

[0048] The bolt feeding machine 7 includes a driving motor 81 and a connector 82 fixed on the motor shaft of the driving motor 81. A slide rail cylinder 83 is also fixedly arranged on the mobile station 12. The driving motor 81 is fixedly installed on the slide seat of the slide rail cylinder 83. The slide rail cylinder 83 can drive the driving motor 81 to move towards the main shaft 3 or the side of the feeding channel. A connection hole 821 is opened at the end of the connector 82, and an internal thread is opened in the connection hole 821. When the driving motor 81 is aligned with the feeding channel, the connector 82 can be close to the end of the feeding channel and be screwed and fixed with the bolt located at the end of the feeding channel. When the driving motor 81 is aligned with the main shaft 3, the connector 82 can be close to the main shaft 3, screw the bolt onto the bar stock, and then separate from the bolt.

[0049] In use, the assembled bolts are transferred to the end of the feeding chute 74, and the bolts are pressed and positioned by the pressing strip 76. The moving table 12 moves the bolt loader 7 to a position opposite to the bolt feeder 8. The connecting head 82 rotates through the driving motor 81, and the slide rail cylinder 83 drives the connecting head 82 to move towards the bolt at the end of the feeding chute 74. The fixed bolt is screwed and fixed to the connecting head 82. After completion, the connecting head 82 retracts. The moving table 12 moves the bolt loader 7 to a position opposite to the main shaft 3, and the slide rail cylinder 83 drives the connecting head 82 to move towards the main shaft 3. A threaded hole is provided on the bar stock. The connecting head 82 screws the bolt thereon into the threaded hole of the bar stock. After the bolt is installed in place, the bolt rotates in the reverse direction relative to the connecting head 82 to achieve the separation of the bolt from the connecting head 82, realizing the installation of the bolt on the connecting head 82 onto the bar stock.

[0050] In this embodiment, the bar stock is a billiard cue. A middle wheel is fixed at the processing end of the billiard cue. During processing, it is necessary to drill and tap the processing end of the billiard cue, turn and chamfer the end face of the middle wheel. After completion, it is necessary to install a joint tooth, and the joint tooth is a double-headed bolt structure; the wooden stepped rod is positioned by the pneumatic chucks 4 at both ends, ensuring that the drilling at the processing end of the billiard cue is concentric with the billiard cue, which also makes the joint tooth concentric with the billiard cue, thus ensuring the coaxiality of the multi-section connected billiard cue after connection and ensuring the controllability of the line of the billiard cue during hitting, improving the quality of the billiard cue.

[0051] In this embodiment, the stepped feeder one 6 in the stock seat 5 and the stepped feeder two 72 in the bolt feeder 8 have the same structure, both of which are existing structures.

[0052] Embodiment Two

[0053] The structure and principle of this embodiment are basically the same as those of Embodiment One. The difference lies in that: the inner end face of the positioning bushing abuts against the end face of the central tube, and connecting convex parts are provided on both the outer wall of the inner end of the positioning bushing and the outer wall of the end of the central tube. The connecting convex part of the positioning bushing and the connecting convex part of the central tube are fixed by bolts. Through this structure, the detachable connection between the positioning bushing and the central tube is realized.

[0054] Embodiment Three

[0055] The structure and principle of this embodiment are basically the same as those of Embodiment One. The difference lies in that: the fixing structure includes a pneumatic gripper and an anti-slip sleeve. The pneumatic gripper is fixedly installed at the end of the feeding chute. When the two jaws of the pneumatic gripper open, they are aligned with the end of the feeding chute. The anti-slip sleeve is sleeved on the jaws of the cylinder gripper. When the bolt is conveyed to the end of the feeding chute, the bolt is located between the two jaws of the pneumatic gripper. The two jaws of the pneumatic gripper are closed to tightly grip and fix the bolt, making the bolt fixed at the end of the feeding chute; the anti-slip sleeve can further increase the gripping force of the two jaws of the pneumatic gripper.

[0056] Embodiment Four

[0057] The structure and principle of this embodiment are basically the same as those of the first embodiment. The differences are as follows: The feeding mechanism includes a conveyor belt installed on the feeding table. The belt body on the upper side of the conveyor belt forms the tabletop of the above-mentioned feeding table, and a number of baffles are fixedly arranged at intervals on the belt body of the conveyor belt. The distance between the baffles on the conveyor belt is greater than the length of the bar stock. The end push plate 1 transports the bar stock to the belt body on the upper side of the conveyor belt. After the end push plate 1 moves upward, the conveyor belt rotates, and the bar stock moves towards the machine tool along with the conveyor belt. When the bar stock is blocked during the movement, the rear baffle will push the bar stock forward. When the baffle rotates and separates from the bar stock, the bar stock completes feeding.

[0058] Embodiment Five

[0059] The structure and principle of this embodiment are basically the same as those of the first embodiment. The differences are as follows: The feeding table and the blanking gripper are arranged horizontally before and after along the Y-axis. The feeding table and the blanking gripper are installed and positioned on the stock preparation base, and the stock preparation base is fixed on the moving base. The moving base can drive the stock preparation base to move back and forth along the Y-axis, and drive the feeding table and the blanking gripper to alternately move to the position aligned with the main shaft through this structure.

[0060] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A bar processing machine tool, comprising a frame (1) and a material preparation seat (5), wherein a shaft seat (2) is fixed on the frame (1), a main shaft (3) is rotatably connected to the shaft seat (2), one end of the main shaft (3) is a feeding end (3a), and the other end of the main shaft (3) is a processing end (3b), the material preparation seat (5) is located at one end of the feeding end (3a) of the main shaft (3), and a movable table (12) that can move freely along the X-axis and Y-axis directions is provided on the frame (1) at the processing end (3b) of the main shaft (3); characterized in that: The spindle (3) is a hollow tube, and pneumatic chucks (4) are provided at both ends of the spindle (3), and the centers of the two pneumatic chucks (4) are located on the axis of the spindle (3); the material preparation seat (5) is provided with a loading platform (54) and a material unloading gripper (551), and the loading platform (54) and the material unloading gripper (551) can be moved alternately to a position aligned with the spindle (3), and the loading platform (54) is provided with a rod on the loading platform (54) that can move the rod on the loading platform (54) to the upper side of the spindle (3). The present invention relates to a material discharging mechanism, wherein the material discharging gripper (551) can extract the bar material on the main shaft (3); a plurality of processing tools (13) are fixed in sequence on the movable table (12) along the Y-axis direction, a bolt loader (7) is also fixed on the movable table (12), a bolt feeder (8) is provided on one side of the main shaft (3) on the frame (1), and the movable table (12) can move the bolt loader (7) to a position aligned with the bolt feeder (8) and the main shaft (3).

2. The bar processing machine tool according to claim 1, characterized in that: A center tube (36) is also provided in the spindle (3), and two ends of the center tube (36) respectively extend out of the spindle (3). Positioning sleeves (37) are detachably connected to the two ends of the center tube (36). The inner hole of the positioning sleeve (37) is a tapered hole. The inner hole of the positioning sleeve (37) is coaxial with the spindle (3), and the end of the inner hole of the positioning sleeve (37) with a smaller inner diameter is arranged outward.

3. The bar processing machine tool according to claim 1 or 2, characterized in that: The bolt feeder (8) comprises a feeding slideway (74) and a fixing structure capable of fixing a bolt at the end of a feeding channel. The bolt loading machine (7) comprises a driving motor (81) and a connecting head (82) fixed on the motor shaft of the driving motor (81). The driving motor (81) is mounted on a moving platform (12). When the driving motor (81) is aligned with the feeding channel, the connecting head (82) can be close to the end of the feeding channel and be screwed and fixed to a bolt located at the end of the feeding channel. When the driving motor (81) is aligned with the main shaft (3), the connecting head (82) can be close to the main shaft (3) and screw the bolt onto the bar material and then be separated from the bolt.

4. The bar processing machine tool according to claim 3, characterized in that: The fixed structure comprises a pressing cylinder (75) and a pressing strip (76); the pressing cylinder (75) is fixedly mounted above the end of the feeding slideway (74); the pressing cylinder (75) is arranged downward; the pressing strip (76) is fixed on a cylinder rod of the pressing cylinder (75); and the pressing cylinder (75) can push the pressing strip (76) to move toward the feeding slideway (74).

5. The bar processing machine tool according to claim 3, characterized in that: The bolt feeder (8) further comprises a chassis (71), a stepped feeder 2 (72) fixed in the chassis (71), and a push cylinder (73), wherein the stepped feeder 2 (72) comprises a plurality of push plates 2 (721) arranged in a stepped manner, wherein the top push plate 2 (721) is aligned with the feeding slideway (74) when in a high position, and the push cylinder (73) is fixed on the chassis (71) and is located at the beginning of the feeding slideway (74).

6. The bar processing machine tool according to claim 1 or 2, characterized in that: A stepped material feeder (6) is installed on the material preparation seat (5), and the stepped material feeder (6) includes a plurality of push plates (61) arranged in a stepped shape, and the push plate (61) located at the top is the end push plate (62). The loading platform (54) is fixed on the lower side of the end push plate (62) in the tilting direction. When the end push plate (62) moves to a high position, the surface of the loading platform (54) is aligned with the upper end surface of the end push plate (62). A material unloading bracket (55) is fixedly connected to the end push plate (62). A material unloading gripper (551) is provided on the unloading bracket (55) along the tilting direction of the end push plate (62) and is located above the loading platform (54). The displacement of the end push plate (62) moving up and down is the same as the distance between the material unloading gripper (551) and the surface of the loading platform (54).

7. The bar processing machine tool according to claim 1, characterized in that: The feeding mechanism comprises a feeding cylinder (542) and a feeding push block (543); the feeding cylinder (542) is fixed on the side of the feeding platform (54); the feeding push block (543) is located on the surface of the feeding platform (54); the cylinder rod of the feeding cylinder (542) is fixedly connected to the feeding push block (543); the feeding cylinder (542) can push the feeding block to move from the front end of the feeding platform (54) to the end.

8. The bar processing machine tool according to claim 1, characterized in that: The unloading gripper (551) comprises an unloading cylinder (552) and a gripper cylinder (553); the unloading cylinder (552) is fixed on an unloading bracket (55); a cylinder body of the gripper cylinder (553) is fixedly connected to a telescopic rod of the unloading cylinder (552); and the unloading cylinder (552) can move the gripper cylinder (553) from the front end of the loading platform (54) to the end thereof.

9. The bar processing machine tool according to claim 1, characterized in that: Therefore, a material unloading guide plate (554) is fixed to the unloading bracket (55), and the material unloading guide plate (554) is located between the loading platform (54) and the unloading gripper (551). The material unloading guide plate (554) is arranged to be inclined downward, and the lower end of the material unloading guide plate (554) is located outside the material preparation seat (5).

10. The bar processing machine tool according to claim 6, characterized in that: The material preparation seat (5) comprises a silo bottom plate (51), the silo bottom plate (51) is arranged to be inclined downward, the stepped feeder 1 (6) is located at the lower end of the silo bottom plate (51), and the upper end surface of the push plate 1 (61) located at the bottom is aligned with the silo bottom plate (51) when it is in a low position.

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