A high-precision machining and honing integrated machine for the inner hole of a sewing machine sleeve

Abstract

The present invention relates to the field of machining technology, and particularly refers to a combined honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, which includes a controller and a frame. A honing station, a reaming station, and a feeding device are provided on the frame. A fixture assembly and a honing device are provided at the honing station. The honing device includes a honing tool bar and honing stones. A push rod is slidably arranged in the honing tool bar, and the push rod is driven to move by a first driving device. A fixture assembly and a reaming device are provided at the reaming station. The reaming device includes a reamer driven to rotate by a first rotating motor. The first rotating motor transmits a torque signal to the controller. When the controller detects that the torque T1 of the first rotating motor exceeds the torque set value T of the first rotating motor set1 of the first rotating motor, the controller controls the first driving device to drive the push rod to increase the outward movement distance of the honing stones. In the present invention, the workpiece does not need to be transferred, there are few semi-finished products in the workshop, the occupied space and capital cost are low, and it effectively avoids rework due to insufficient machining caused by wear of the honing tool. The processing time and cost are low, and the production efficiency is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of machining, and particularly relates to a combined honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve. Background Art

[0002] For the high-precision machining of the inner hole of a sewing machine sleeve, the sleeve blank with an inner hole is first rough-machined with a honing tool and then finely machined with a reamer. The honing tool for rough machining the inner hole includes a tool rod, honing strips arranged on the tool rod, and a push rod slidably arranged in the tool rod for pushing the honing strips to move outwards. When the push rod moves towards the end close to the honing strips, the honing strips are pushed outwards.

[0003] In the existing machining, it is usually carried out in multiple separate processes, and the inner hole of the finished workpiece is usually detected. The sleeve needs to be transferred many times, resulting in a large number of semi-finished products in the workshop, occupying a large space and having a high capital cost, and low production efficiency. At the same time, when the honing tool wears and the rough machining is not in place, the wear of the reamer will be accelerated. After it is detected that the fine machining of the reaming is not in place, the sleeves need to be reworked in batches, and the honing rough machining and reaming fine machining are carried out again, resulting in an increase in machining time and cost and low production efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a combined honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, in which the workpiece does not need to be transferred, there are few semi-finished products in the workshop, it occupies a small space and has a low capital cost, and it effectively avoids rework due to insufficient machining caused by the wear of the honing tool, with low machining time and cost and high production efficiency.

[0005] The present invention is realized as follows:

[0006] A combined honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve includes a controller and a frame. A honing station, a reaming station, and a feeding device for moving the workpiece at the honing station to the reaming station are arranged on the frame. A fixture assembly for fixing the workpiece and a honing device located above the fixture assembly are arranged at the honing station. The honing device includes a honing tool rod driven to rotate by a power device I and honing strips arranged on the honing tool rod. A push rod for pushing the honing strips to move outwards is slidably arranged in the honing tool rod. The push rod is driven by a driving device I to move along the axial direction of the honing tool rod. The driving device I is connected to the controller by wire or wirelessly. A fixture assembly for fixing the workpiece and a reaming device located above the fixture assembly are arranged at the reaming station. The reaming device includes a reamer driven to rotate by a rotary motor I. The rotary motor I is connected to the controller by wire or wirelessly, and the rotary motor I transmits a torque signal to the controller. When the controller detects that the torque T of the rotary motor I 1 exceeds the torque set value T of the rotary motor I set1When it is time, the controller controls the driving device 1 to drive the push rod to increase the outward movement distance of the honing strip.

[0007] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, the set value T of the rotary motor 1 set1 is the torque target value T 0 at 115% of it. The torque T of the rotary motor 1 1 and the difference ΔT between the set value T of the rotary motor 1 set1 each time it exceeds 1% of the torque target value T 0 will increase the outward movement distance of the honing strip by 0.001 mm.

[0008] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, there are two or more reaming stations. The feeding device moves the workpiece at the previous reaming station to the next reaming station. The controller adjusts the outward movement distance of the honing strip according to the torque T of the rotary motor 1 at the first reaming station. 1 Adjust the outward movement distance of the honing strip.

[0009] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, there is a mounting plate 2 driven to move vertically by a driving device 4 on the frame. The rotary motor 1 at each reaming station is arranged on the mounting plate 2. The reamer is arranged on the corresponding rotary motor 1. The driving device 4 and the controller are connected by wire or wirelessly.

[0010] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, the driving device 4 is a cylinder, an oil cylinder, a linear motor or a combination of a motor and a ball screw.

[0011] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, there is a loading station on the frame. There is a turntable driven by a power device 2 at the loading station. A plurality of workpieces are evenly distributed in a circle on the turntable. There is a conveyor belt on the side of the last reaming station. The feeding device moves the workpiece at the loading station to the honing station and moves the workpiece at the last reaming station to the conveyor belt. The feeding device includes a strip-shaped plate driven by a power device 3 to complete the reciprocating motion of rising - translating - descending. A plurality of clamping devices for clamping workpieces are arranged at intervals along the length direction of the strip-shaped plate. The conveying direction of the conveyor belt is perpendicular to the length direction of the strip-shaped plate. The power device 2 and the controller are connected by wire or wirelessly. The power device 3 and the controller are connected by wire or wirelessly.

[0012] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, the power device 2 is a servo motor, a rotary cylinder or a hydraulic motor.

[0013] In the above-mentioned integrated reaming and honing machine for high-precision machining of the inner hole of a sewing machine sleeve, the power device three can be a high-speed pick-and-place device driven by a rotary mechanism unit disclosed in a Chinese utility model (publication number CN203993885U, application date July 8, 2014, publication date December 10, 2014), and the strip plate is installed on its longitudinal linear guide; the power device three can also be a material-taking manipulator convenient for lateral installation disclosed in a Chinese utility model patent (publication number CN218747787U, application date December 15, 2022, publication date March 28, 2023), and the strip plate 37 is installed on its fixture loading arm.

[0014] In the above-mentioned integrated reaming and honing machine for high-precision machining of the inner hole of a sewing machine sleeve, the clamping device can be a three-jaw cylinder; the clamping device can also be a finger cylinder, and clamping blocks are respectively arranged on the two claw arms of the finger cylinder, and a clamping hole adapted to the outer side wall of the workpiece is formed between the two clamping blocks, and the workpiece is clamped and released by their combined action.

[0015] In the above-mentioned integrated reaming and honing machine for high-precision machining of the inner hole of a sewing machine sleeve, the power device one is a rotary motor two, and the rotary motor two is connected to the controller by wire or wirelessly, and the rotary motor two transmits a torque signal to the controller. When the controller detects that the torque T of the rotary motor two 2 exceeds the set value T of the rotary motor two set2 the controller controls the drive device one to slow down the moving speed of the push rod.

[0016] In the above-mentioned integrated reaming and honing machine for high-precision machining of the inner hole of a sewing machine sleeve, an installation plate one driven to move vertically by a drive device two is arranged on the frame. A spindle seat is arranged on the installation plate one, and a hollow spindle is rotatably connected in the spindle seat. The hollow spindle is driven to rotate by the power device one. The lower end of the hollow spindle is connected to the honing tool bar. A ejector rod whose lower end abuts against the push rod is slidably arranged in the hollow spindle. A return spring one for resetting the ejector rod upward is sleeved on the ejector rod. The drive device one includes a vertical plate arranged on the installation plate one. A vertical guide rail and a rotary motor three are arranged on the vertical plate. A slider is slidably arranged on the vertical guide rail. A slide plate is arranged on the slider. The rotary motor three is connected to the slide plate through a ball screw mechanism. A pressing block for pressing on the upper end of the ejector rod is arranged on the slide plate.

[0017] In the above-mentioned integrated reaming and honing machine for high-precision machining of the inner hole of a sewing machine sleeve, the drive device two is connected to the controller by wire or wirelessly, and the drive device two is a cylinder, an oil cylinder, a linear motor or a combination of a motor and a ball screw.

[0018] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, a pressure sensor for detecting the pressure of the ejector rod is provided below the pressing block. The pressure sensor is connected to the controller by wire or wirelessly, and the pressure sensor transmits a pressure signal to the controller. The third rotating motor is connected to the controller by wire or wirelessly. When the detected value of the pressure sensor is greater than the set value, the controller controls the third rotating motor to stop running. After the detected value of the pressure sensor is less than the set value, the third rotating motor continues to run.

[0019] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, a top plate is fixed to the upper end of the ejector rod. The first power device is a second rotating motor arranged on the first mounting plate. A driving wheel is provided on the rotating shaft of the second rotating motor. A driven wheel driven by the driving wheel is sleeved on the upper end of the hollow main shaft. An assembly plate is fixed above the driven wheel. A limiting post for circumferentially limiting the top plate is provided on the assembly plate. The first return spring is arranged between the top plate and the assembly plate. A pressing rod is pressed on the upper end of the ejector rod. A radial bearing is sleeved outside the pressing rod, and a bearing housing is sleeved outside the radial bearing. The bearing housing is mounted on the pressure sensor.

[0020] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, the driving wheel and the driven wheel can be connected by a synchronous belt, can be connected by a chain, or can be meshed.

[0021] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, a thrust bearing is sleeved on the upper end of the ejector rod and is located above the top plate. The pressing rod is pressed on the ejector rod through the thrust bearing.

[0022] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, two radial bearings are provided. An upper cover plate fixed to the bearing housing is provided above the upper radial bearing, and a lower cover plate fixed to the bearing housing is provided below the lower radial bearing. A connecting plate is provided above the upper cover plate. The pressure sensor is fixed to the connecting plate by screws. The upper cover plate and the connecting plate are connected by connecting strips. A plurality of connecting strips are circumferentially distributed and are arranged around the outer circumference of the pressing rod. A nut for upper limiting of the radial bearing is screwed to the upper end of the pressing rod, and a limiting step for lower limiting of the radial bearing is provided at the lower end of the pressing rod.

[0023] In the above-mentioned high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve, the connecting plate, the connecting strips and the upper cover plate are of an integral structure.

[0024] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, a push rod inclined surface is provided at the end of the push rod extending into the honing tool bar. A wedge block is slidably arranged on the honing tool bar in the radial direction. A through hole for the wedge block to protrude is provided on the side wall of the honing tool bar. A wedge block inclined surface adapted to the push rod inclined surface is provided on the inner side of the wedge block, and the honing strip is provided on the outer side. One wedge block and one honing strip are provided. A wear-resistant strip is provided on the outer side of the honing tool bar, and the honing strip and the wear-resistant strip are circumferentially arranged at equal intervals.

[0025] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, more than two wear-resistant strips are provided. The material of the wear-resistant strip is cemented carbide, high-speed steel or tungsten steel, and it is fixed on the honing tool bar by welding.

[0026] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, a snap ring is provided at the upper end of the push rod. A second return spring for returning the push rod to the end away from the honing tool bar is sleeved on the upper end of the push rod. The second return spring is arranged between the snap ring and the honing tool bar.

[0027] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, a limit sleeve driven by a third driving device to move axially along the honing tool bar is sleeved outside the honing tool bar. The third driving device is connected to the controller by wire or wirelessly. When the honing device does not process the workpiece, the limit sleeve is located outside the periphery of the honing strip to prevent the wedge block from falling; when the honing device processes the workpiece, the limit sleeve is located outside the periphery of the honing tool bar without the honing strip.

[0028] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, the third driving device is a cylinder, an oil cylinder, a linear motor or a combination of a motor and a ball screw.

[0029] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, the fixture assembly includes two oppositely arranged vertical plates. A mounting disc is rotatably arranged between the two vertical plates. The rotation axis of the mounting disc is arranged horizontally. A floating column with an axial direction along the vertical direction is rotatably arranged inside the mounting disc. The rotation axis of the floating column is arranged horizontally and perpendicular to the rotation axis of the mounting disc. An elastic collet is arranged inside the floating column. An elastic membrane sleeved outside the elastic collet is arranged between the floating column and the elastic collet. The upper and lower ends of the elastic membrane are respectively sealed with the floating column. A cavity is left between the floating column and the elastic membrane. An air inlet channel communicating with the cavity is provided on the side wall of the floating column. An air pipe communicating with the air inlet channel is provided on the floating column. An installation column is provided below the floating column. A limit block is sleeved on the upper end of the installation column, and the limit block is threadedly connected to the installation column.

[0030] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, the material of the elastic membrane is rubber.

[0031] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, an upper pressure plate is fixed to the upper end of the floating column by screws, and a lower pressure plate is fixed to the lower end of the floating column by screws. The upper end of the elastic membrane is flanged and pressed between the upper pressure plate and the floating column, and the lower end is flanged and pressed between the lower pressure plate and the floating column.

[0032] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, two rotating shafts arranged oppositely are installed on the mounting disc, and the rotating shafts are rotatably connected to the corresponding vertical plates through bearings; two rotating shafts arranged oppositely are installed on the floating column, and the rotating shafts are rotatably connected to the mounting disc through bearings.

[0033] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, the elastic collet is cylindrical, and a clamping hole adapted to the workpiece is provided inside. A first notch with an upward opening and a second notch with a downward opening are circumferentially and evenly distributed on the side wall of the elastic collet, and the first notch and the second notch are arranged alternately.

[0034] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, the fixture assembly further includes a bottom plate. The lower end of the vertical plate is fixed to the bottom plate, a flange is provided at the lower end of the mounting column, and the flange is fixed to the bottom plate by screws.

[0035] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, a waist-shaped hole is provided on the push rod along the vertical direction of the length, a limit pin is inserted radially on the honing tool bar, and the limit pin is inserted into the waist-shaped hole.

[0036] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, a hollow fixed sleeve is fixedly installed at the lower end of the hollow main shaft by screws, a tool bar sleeve is fixedly installed inside the fixed sleeve by screws, and the upper end of the honing tool bar is fixed inside the tool bar sleeve.

[0037] In the above-mentioned integrated honing and reaming machine for high-precision machining of the inner hole of a sewing machine sleeve, a boss is provided on the honing tool bar below the tool bar sleeve, a connecting nut is screwed on the upper end of the honing tool bar above the tool bar sleeve, and the honing tool bar is locked inside the tool bar sleeve through the connecting nut.

[0038] The outstanding advantages of the present invention compared with the prior art are:

[0039] 1. The present invention sets a honing station and a reaming station on one device, and the workpiece at the honing station is moved to the reaming station through the feeding device. The rough honing and fine reaming of the inner hole of the workpiece can be completed through the device of the present invention. The workpiece does not need to be transferred, there are few semi-finished products in the workshop, the occupied space is small, the capital cost is low, and the production efficiency is high; at the same time, when the controller detects the torque T of the first rotating motor 1Exceeding the torque set value T of the rotating motor 1 set1 When this occurs, the controller controls the driving device 1 to drive the push rod to increase the outward movement distance of the honing strip, so as to increase the inner hole size of the workpiece to be processed next. The response is rapid, effectively avoiding batch rework due to insufficient machining caused by honing tool wear. The machining time and cost are low, and the production efficiency is high;

[0040] 2. When the controller detects that the torque T of the rotating motor 2 2 exceeds the set value T of the rotating motor 2 set2 the controller controls the driving device 1 to drive and slow down the moving speed of the push rod, thereby reducing the wear of the honing tool and effectively protecting the honing tool;

[0041] 3. A pressure sensor for detecting the pressure of the ejector rod is provided below the pressing block in the present invention. When the detected value of the pressure sensor is greater than the set value, the controller controls the rotating motor 3 to stop running. After the detected value of the pressure sensor is less than the set value, the rotating motor 3 continues to run. During the machining process, it is ensured that the honing tool works under the set pressure, effectively slowing down the scrapping of the tool. Description of the Drawings

[0042] Figure 1 is a perspective view of the present invention;

[0043] Figure 2 is a perspective view of the honing device of the present invention;

[0044] Figure 3 is a cross-sectional view of the installation structure of the honing tool and the pressure sensor of the present invention;

[0045] Figure 4 is a perspective view of the honing tool of the present invention;

[0046] Figure 5 is an exploded view of the honing tool of the present invention;

[0047] Figure 6 is a perspective view of the wedge block of the present invention;

[0048] Figure 7 is a perspective view of the fixture assembly of the present invention;

[0049] Figure 8 is a cross-sectional view of the fixture assembly of the present invention.

[0050] Reference numerals: 1, frame; 2, honing tool bar; 3, honing strip; 4, push rod; 5, first rotary motor; 6, reamer; 7, second rotary motor; 8, first mounting plate; 9, spindle seat; 10, hollow spindle; 11, ejector rod; 12, first return spring; 13, vertical plate; 14, vertical guide rail; 15, third rotary motor; 16, slider; 17, slide plate; 18, pressing block; 19, pressure sensor; 20, top plate; 21, driving wheel; 22, driven wheel; 23, assembly plate; 24, limit post; 25, pressing rod; 26, radial bearing; 27, bearing seat; 28, thrust bearing; 29, inclined surface of push rod; 30, wedge block; 31, inclined surface of wedge block; 32, wear-resistant strip; 33, limit sleeve; 34, second mounting plate; 35, turntable; 36, conveyor belt; 37, strip plate; 38, upper cover plate; 39, lower cover plate; 40, connecting plate; 41, connecting strip; 42, circlip; 43, second return spring; 44, vertical plate; 45, mounting disc; 46, floating column; 47, elastic bushing; 48, elastic membrane; 49, cavity; 50, mounting column; 51, limit block; 52, upper pressing plate; 53, lower pressing plate; 54, bottom plate; 55, flange; 56, limit pin; 57, fixed sleeve; 58, tool bar sleeve. Detailed implementation mode

[0051] The present invention will be further described below with specific embodiments. Refer to Figure 1 —8:

[0052] A high-precision machining reaming and honing integrated machine for the inner hole of a sewing machine sleeve includes a controller and a frame 1. A honing station, a reaming station, and a feeding device for moving the workpiece at the honing station to the reaming station are provided on the frame 1. A fixture assembly for fixing the workpiece and a honing device located above the fixture assembly are provided at the honing station. The honing device includes a honing tool bar 2 driven to rotate by a first power device and honing strips 3 arranged on the honing tool bar 2. A push rod 4 for pushing the honing strips 3 to move outwards is slidably arranged in the honing tool bar 2. The push rod 4 is driven by a first driving device to move along the axial direction of the honing tool bar 2. The first driving device is connected to the controller by wire or wirelessly. A fixture assembly for fixing the workpiece and a reaming device located above the fixture assembly are provided at the reaming station. The reaming device includes a reamer 6 driven to rotate by a first rotary motor 5. The first rotary motor 5 is connected to the controller by wire or wirelessly, and the first rotary motor 5 transmits a torque signal to the controller. When the controller detects that the torque T of the first rotary motor 5 1 exceeds the torque set value T of the first rotary motor 5 set1 the controller controls the first driving device to drive the push rod 4 to increase the outward movement distance of the honing strips 3.

[0053] The working principle of the present invention: As Figure 1-8As shown, the fixture assembly of the honing station clamps the workpiece, the power device 1 drives the honing tool rod 2 to rotate, and the driving device 1 drives the push rod 4 to move the honing bar 3 outward to perform rough honing on the inner hole of the workpiece. After the honing process is completed, the feeding device moves the workpiece of the honing station to the reaming station, and the rotating motor 5 drives the reamer 6 to rotate to perform fine reaming on the inner hole of the workpiece.

[0054] When the controller detects the torque T of the rotating motor 5 1 When the torque exceeds the set value Tset1 of the rotating motor 5, it indicates that the inner hole of the workpiece at the reaming station is too small, that is, the previous honing station has not been processed in place, and the feedback is sent to the controller. The controller controls the driving device to drive the push rod 4 to increase the outward movement distance of the honing stick 3 to increase the inner hole size of the workpiece to be processed next. The response is rapid, and batch rework due to wear of the honing tool and inadequate processing is effectively avoided. The processing time and cost are low, and the production efficiency is high.

[0055] The present invention arranges a honing station and a reaming station on one device, and moves the workpiece at the honing station to the reaming station through a feeding device. The rough honing processing and fine reaming processing of the inner hole of the workpiece can be completed by the equipment of the present invention. The workpiece does not need to be circulated, the number of semi-finished products in the workshop is small, the space occupied is small, the capital cost is low, and the production efficiency is high.

[0056] Furthermore, the setting value T of the rotating motor 5 is set1 is the torque target value T 0 115% of the torque T of the rotating motor 1 The setting value T of the rotating motor 5 set1 The difference ΔT exceeds the torque target value T 0 1%, the outer displacement distance of the honing stick 3 increases by 0.001 mm, that is, when the torque T of the rotating motor 5 1 is the torque target value T 0 When the torque T of the rotating motor 5 is 116%, the outer displacement distance of the honing stone 3 increases by 0.001 mm; 1 is the torque target value T 0 When the honing speed reaches 117%, the outward displacement of honing stone 3 increases by 0.002 mm, and so on.

[0057] Furthermore, the reaming stations are provided with more than two, the feeding device moves the workpiece of the upper reaming station to the lower reaming station, and the controller is based on the torque T of the rotating motor 15 of the first reaming station. 1 Adjust the outward displacement distance of the honing stone 3.

[0058] In order to facilitate synchronous driving of the reamer 6, as Figure 1As shown in the figure, an installation plate two 34 driven to move vertically by a driving device four is provided on the frame 1. The first rotating motors 5 at each reaming hole station are all arranged on the installation plate two 34. The reamer 6 is arranged on the corresponding first rotating motor 5. The driving device four is connected to the controller by wire or wirelessly.

[0059] Furthermore, the driving device four is a cylinder, an oil cylinder, a linear motor or a combination of a motor and a ball screw. In this embodiment, the driving device four is a combination of a motor and a ball screw, and the installation plate two 34 is installed on the nut of the ball screw.

[0060] For automatic loading and unloading, a loading station is provided on the frame 1. A turntable 35 driven by a power device two is provided at the loading station. A plurality of workpieces are evenly distributed in a circle on the turntable 35. A conveyor belt 36 is provided on the side of the last reaming hole station. The feeding device moves the workpieces at the loading station to the honing station and moves the workpieces at the last reaming hole station to the conveyor belt 36. The feeding device includes a strip plate 37 driven by a power device three to complete reciprocating motion of rising - translating - descending. A plurality of clamping devices for clamping workpieces are arranged at intervals along the length direction of the strip plate 37. The conveying direction of the conveyor belt 36 is perpendicular to the length direction of the strip plate 37. The power device two is connected to the controller by wire or wirelessly. The power device three is connected to the controller by wire or wirelessly.

[0061] Furthermore, the power device two is a servo motor, a rotary cylinder or a hydraulic motor. In this embodiment, the power device two is a servo motor.

[0062] In this embodiment, the power device three is a high - speed picking and placing device driven by a rotary mechanism unit disclosed in the Chinese Utility Model (Publication No. CN203993885U, Application Date: July 8, 2014, Publication Date: December 10, 2014), and the strip plate 37 is installed on its longitudinal linear guide rail.

[0063] In this embodiment, the clamping device is a three - jaw cylinder.

[0064] To protect the honing tool, the power device one is a second rotating motor 7. The second rotating motor 7 is connected to the controller by wire or wirelessly, and the second rotating motor 7 transmits a torque signal to the controller. When the controller detects that the torque T of the second rotating motor 7 2 exceeds the set value T of the second rotating motor 7 set2 the controller controls the driving device one to slow down the moving speed of the push rod 4, thereby reducing the wear of the honing tool.

[0065] The specific structure of the honing device: As Figure 1-6As shown in the figure, an installation plate 1 is provided on the frame 1 and is driven vertically by a second driving device. A main shaft seat 9 is provided on the installation plate 1. A hollow main shaft 10 is rotatably connected inside the main shaft seat 9. The hollow main shaft 10 is driven to rotate by the first power device. The lower end of the hollow main shaft 10 is connected to the honing tool bar 2. A ejector rod 11 is slidably arranged inside the hollow main shaft 10, and the lower end of the ejector rod 11 abuts against the push rod 4. A first return spring 12 for resetting the ejector rod 11 upward is sleeved on the ejector rod 11. The first driving device includes a vertical plate 13 provided on the installation plate 1. A vertical guide rail 14 and a third rotating motor 15 are provided on the vertical plate 13. A slider 16 is slidably arranged on the vertical guide rail 14. A sliding plate 17 is provided on the slider 16. The third rotating motor 15 is connected to the sliding plate 17 through a ball screw mechanism. A pressing block 18 for pressing on the upper end of the ejector rod 11 is provided on the sliding plate 17. By controlling the downward movement distance of the pressing block 18 through the third rotating motor 15 and the ball screw mechanism, the downward movement distance of the pressing block 18 can be accurately controlled, that is, the outward movement distance of the honing strip 3 can be accurately controlled, and thus the honing processing accuracy can be effectively improved.

[0066] Furthermore, the second driving device is connected to the controller by wire or wirelessly. The second driving device is a cylinder, an oil cylinder, a linear motor or a combination of a motor and a ball screw. In this embodiment, the second driving device is a combination of a motor and a ball screw, and the installation plate 1 is installed on the nut of the ball screw.

[0067] To protect the honing tool, as Figure 2 、 3 shown, a pressure sensor 19 for detecting the pressure of the ejector rod 11 is provided below the pressing block 18. The pressure sensor 19 is connected to the controller by wire or wirelessly, and the pressure sensor 19 transmits a pressure signal to the controller. The third rotating motor 15 is connected to the controller by wire or wirelessly. When the detected value of the pressure sensor 19 is greater than the set value, the controller controls the third rotating motor 15 to stop running, that is, to stop the outward movement of the honing strip 3. After the detected value of the pressure sensor 19 is less than the set value, the third rotating motor 15 runs again, that is, the honing strip 3 continues to move outward, ensuring that the honing tool works under the set pressure during the processing, and effectively slowing down the scrapping of the tool.

[0068] In this embodiment, the pressure sensor 19 is a pressure sensor of model ZNLBM-VI produced by Bengbu Zhongnuo and is fixedly installed on the pressing block 18 by screws.

[0069] To enable the ejector rod 11 to rotate while the pressure sensor 19 does not rotate, so that the pressure sensor 19 can better detect the pressure from the ejector rod 11, as Figure 2 、 3As shown, a top plate 20 is fixed to the upper end of the ejector rod 11. The first power device is a second rotary motor 7 provided on the first mounting plate 8. A driving wheel 21 is provided on the rotating shaft of the second rotary motor 7. A driven wheel 22 driven by the driving wheel 21 is sleeved on the upper end of the hollow main shaft 10. An assembly plate 23 is fixed above the driven wheel 22. A limiting post 24 for circumferentially limiting the top plate 20 is provided on the assembly plate 23. The first return spring 12 is arranged between the top plate 20 and the assembly plate 23. A pressure rod 25 is pressed on the upper end of the ejector rod 11. A radial bearing 26 is sleeved outside the pressure rod 25, and a bearing housing 27 is sleeved outside the radial bearing 26. The bearing housing 27 is installed on the pressure sensor 19.

[0070] When the hollow main shaft 10 rotates, it drives the honing tool bar 2 and the assembly plate 23 to rotate. The rotation of the assembly plate 23 drives the top plate 20 to rotate through the limiting post 24, and then drives the ejector rod 11 to rotate.

[0071] Furthermore, the driving wheel 21 and the driven wheel 22 can be connected by a synchronous belt, or by a chain, or by meshing connection. In this embodiment, the driving wheel 21 and the driven wheel 22 are connected by a synchronous belt.

[0072] In order that the pressure sensor 19 does not rotate when the ejector rod 11 rotates, further protecting the pressure sensor 19, as Figure 2 、 3 shown, a thrust bearing 28 is sleeved on the upper end of the ejector rod 11 above the top plate 20, and the pressure rod 25 is pressed on the ejector rod 11 through the thrust bearing 28.

[0073] The specific installation structure of the bearing housing 27 and the pressure sensor 19: Two radial bearings 26 are provided. An upper cover plate 38 for upper limiting the outer ring of the upper radial bearing 26 and fixed to the bearing housing 27 is provided above the upper radial bearing 26. A lower cover plate 39 for lower limiting the outer ring of the lower radial bearing 26 and fixed to the bearing housing 27 is provided below the lower radial bearing 26. A connecting plate 40 is provided above the upper cover plate 38. The connecting plate 40 is fixed to the pressure sensor 19 by screws. The upper cover plate 38 and the connecting plate 40 are connected by connecting bars 41. A plurality of connecting bars 41 are circumferentially distributed and surround the outer circumference of the pressure rod 25. A nut for upper limiting the inner ring of the radial bearing 26 is screwed to the upper end of the pressure rod 25, and a limiting step for lower limiting the inner ring of the radial bearing 26 is provided at the lower end of the pressure rod 25.

[0074] In order to reduce the assembly steps and ensure firm and reliable connection, the connecting plate 40, the connecting bars 41 and the upper cover plate 38 are of an integral structure.

[0075] The specific structure of the honing tool: As Figures 3-6As shown, the end of the push rod 4 extending into the honing tool bar 2 is provided with a push rod inclined surface 29. A wedge block 30 is slidably arranged radially on the honing tool bar 2. A through hole for the wedge block 30 to protrude is provided on the side wall of the honing tool bar 2. The inner side of the wedge block 30 is provided with a wedge block inclined surface 31 adapted to the push rod inclined surface 29, and the honing strip 3 is arranged on the outer side. There is one wedge block 30 and one honing strip 3. A wear-resistant strip 32 is arranged on the outer side of the honing tool bar 2. The arrangement of one wedge block 30 and one honing strip 3 is suitable for a honing tool bar 2 with a smaller size. The arrangement of the wear-resistant strip 32 can effectively position and guide the position of the honing tool bar 2 in the inner hole of the workpiece, and the use of wear-resistant materials can reduce wear and extend the service life.

[0076] Furthermore, there are more than two wear-resistant strips 32. The material of the wear-resistant strip 32 is cemented carbide, high-speed steel or tungsten steel, and it is fixed on the honing tool bar 2 by welding. In this embodiment, there are two wear-resistant strips 32, and the material of the wear-resistant strip 32 is cemented carbide.

[0077] Reset structure of the push rod 4: A snap ring 42 is arranged on the push rod 4. A second return spring 43 for returning the push rod 4 to the end away from the honing tool bar 2 is sleeved on the push rod 4. The second return spring 43 is arranged between the snap ring 42 and the honing tool bar 2.

[0078] In order to prevent the wedge block 30 and the honing strip 3 from falling off when not machining, a limit sleeve 33 driven by a third driving device to move axially along the honing tool bar 2 is sleeved outside the honing tool bar 2. The third driving device is connected to the controller by wire or wirelessly. When the honing device does not machine the workpiece, the limit sleeve 33 is located on the outer periphery of the honing strip 3 to limit the wedge block 30 from falling; when the honing device machines the workpiece, the limit sleeve 33 is located on the outer periphery of the honing tool bar 2 without the honing strip 3.

[0079] Furthermore, the third driving device is a cylinder, an oil cylinder, a linear motor or a combination of a motor and a ball screw. In this embodiment, the third driving device is two cylinders arranged on the first mounting plate 8, and both ends of the limit sleeve 33 are respectively connected to the piston rods of the corresponding cylinders.

[0080] Structure of the fixture assembly: As Figure 7 、 8As shown, the fixture assembly includes two oppositely arranged vertical plates 44. Between the two vertical plates 44, a mounting disk 45 is rotatably provided. The rotation axis of the mounting disk 45 is arranged horizontally. Inside the mounting disk 45, a floating column 46 with its axis arranged vertically is rotatably provided. The rotation axis of the floating column 46 is arranged horizontally and perpendicular to the rotation axis of the mounting disk 45. An elastic collet 47 is provided inside the floating column 46. An elastic membrane 48 sleeved outside the elastic collet 47 is provided between the floating column 46 and the elastic collet 47. The upper and lower ends of the elastic membrane 48 are respectively sealed with the floating column 46. A cavity 49 is left between the floating column 46 and the elastic membrane 48. An air inlet channel communicating with the cavity 49 is provided on the side wall of the floating column 46. A trachea communicating with the air inlet channel is provided on the floating column 46. An installation column 50 is provided below the floating column 46. A limit block 51 is sleeved on the upper end of the installation column 50. The limit block 51 is threadedly connected with the installation column 50. After the workpiece is placed in the elastic collet 47, air is introduced into the trachea. The air enters the cavity 49 through the air inlet channel, expands the elastic membrane 48, and squeezes the elastic collet 47. The elastic collet 47 contracts to clamp the workpiece. After the workpiece processing is completed, no air is introduced into the trachea. The elastic collet 47 and the elastic membrane 48 reset under the action of elastic force and squeeze the air in the cavity 49 into the air inlet channel and the trachea to loosen the workpiece. The tool can automatically find the center of the inner hole of the workpiece after moving down to the workpiece, with low requirements for the position accuracy of the tool and the workpiece, and is convenient for installation.

[0081] A limit block 51 is provided to control the swaying amplitude of the floating column 46. When the limit block 51 moves upward, the gap between the limit block 51 and the floating column 46 is small, and the swaying amplitude of the floating column 46 is small. When the limit block 51 moves downward, the gap between the limit block 51 and the floating column 46 is large, and the swaying amplitude of the floating column 46 is large.

[0082] Preferably, the material of the elastic membrane 48 is rubber.

[0083] The installation structure of the elastic membrane 48: As Figure 7 、 8 shown, an upper pressing plate 52 is fixed to the upper end of the floating column 46 by screws, and a lower pressing plate 53 is fixed to the lower end of the floating column 46 by screws. The upper end of the elastic membrane 48 is flanged and pressed between the upper pressing plate 52 and the floating column 46, and the lower end is flanged and pressed between the lower pressing plate 53 and the floating column 46.

[0084] The rotation structure of the mounting disk 45 and the vertical plate 44: Two opposite rotation shafts are installed on the mounting disk 45. The rotation shafts are rotatably connected to the corresponding vertical plates 44 through bearings.

[0085] The rotation structure of the floating column 46 and the mounting disk 45: Two opposite rotation shafts are installed on the floating column 46. The rotation shafts are rotatably connected to the mounting disk 45 through bearings.

[0086] Structure of the elastic collet 47: The elastic collet 47 is in the shape of a cylinder and is provided with a clamping hole adapted to the workpiece inside. On the side wall of the elastic collet 47, a first notch with an upward opening and a second notch with a downward opening are evenly distributed in the circumferential direction, and the first notch and the second notch are arranged alternately.

[0087] In order to form the fixture assembly into a whole and facilitate assembly, the fixture assembly further includes a bottom plate 54. The lower end of the vertical plate 44 is fixed on the bottom plate 54. The lower end of the mounting column 50 is provided with a flange 55, and the flange 55 is fixed on the bottom plate 54 by screws.

[0088] To prevent the push rod 4 from moving excessively and leaving the honing tool bar 2, a waist-shaped hole is provided on the push rod 4 with its length direction arranged vertically. A limit pin 56 is inserted radially into the honing tool bar 2, and the limit pin 56 is inserted into the waist-shaped hole.

[0089] Specific installation structure of the honing tool bar 2: The lower end of the hollow main shaft 10 is fixedly installed with a hollow fixing sleeve 57 by screws. Inside the fixing sleeve 57, a tool bar sleeve 58 is fixedly installed by screws, and the upper end of the honing tool bar 2 is fixed inside the tool bar sleeve 58.

[0090] Specific connection structure between the honing tool bar 2 and the tool bar sleeve 58: The honing tool bar 2 is provided with a boss below the tool bar sleeve 58. A connecting nut is screwed on the upper end of the honing tool bar 2 above the tool bar sleeve 58, and the honing tool bar 2 is locked inside the tool bar sleeve 58 by the connecting nut.

[0091] The above embodiments are only some of the preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, all equivalent changes made according to the shape, structure, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-precision machining, reaming and honing machine for the inner hole of a sewing machine sleeve, characterized in that: The invention comprises a controller and a frame (1), wherein the frame (1) is provided with a honing station, a reaming station, and a feeding device for moving a workpiece from the honing station to the reaming station, wherein the honing station is provided with a clamp assembly for fixing the workpiece and a honing device located above the clamp assembly, wherein the honing device comprises a honing bar (2) driven to rotate by a power device and a honing bar (3) arranged on the honing bar (2), wherein a push rod (4) is slidably provided inside the honing bar (2) for pushing the honing bar (3) to move outward, and wherein the push rod (4) is driven by a driving device. The honing tool rod (2) is moved axially, the driving device (1) is connected to the controller via wired or wireless communication, the reaming station is provided with a fixture assembly for fixing the workpiece and a reaming device located above the fixture assembly, the reaming device comprises a reamer (6) driven to rotate by a rotating motor (5), the rotating motor (5) is connected to the controller via wired or wireless communication, and the rotating motor (5) transmits a torque signal to the controller, when the controller detects that the torque T1 of the rotating motor (5) exceeds the torque setting value T1 of the rotating motor (5), ... driving device (1) is connected to the controller via wired or wireless communication, the controller set1 When the honing rod (3) is moved outward, the controller controls the driving device to drive the push rod (4) to increase the outward movement distance of the honing rod (3).

2. The high-precision machining, reaming and honing machine for the inner hole of a sewing machine sleeve according to claim 1, characterized in that: The setting value T of the rotating motor 1 (5) set1 is 115% of the torque target value T0, and the torque T1 of the rotating motor 1 (5) is equal to the set value T of the rotating motor 1 (5). set1 For every 1% by which the difference ΔT exceeds the torque target value T0, the outward displacement distance of the honing stone (3) increases by 0.001 mm.

3. A high-precision machining, reaming and honing machine for the inner hole of a sewing machine sleeve according to claim 1 or 2, characterized in that: There are more than two reaming stations, the feeding device moves the workpiece of the upper reaming station to the lower reaming station, and the controller adjusts the outward movement distance of the honing bar (3) according to the torque T1 of the rotating motor 1 (5) of the first reaming station.

4. The high-precision machining, reaming and honing machine for the inner hole of a sewing machine sleeve according to claim 1, characterized in that: The power device 1 is a rotating motor 2 (7), the rotating motor 2 (7) is connected to the controller via a wired or wireless connection, and the rotating motor 2 (7) transmits a torque signal to the controller. When the controller detects that the torque T2 of the rotating motor 2 (7) exceeds the set value T of the rotating motor 2 (7), the controller set2 When the controller controls the driving device 1 to slow down the moving speed of the push rod (4).

5. The high-precision machining, reaming and honing machine for the inner hole of a sewing machine sleeve according to claim 1, characterized in that: The frame (1) is provided with a mounting plate (8) driven by a driving device (2) to move vertically, the mounting plate (8) is provided with a spindle seat (9), a hollow spindle (10) is rotatably connected in the spindle seat (9), the hollow spindle (10) is driven to rotate by the power device (1), the lower end of the hollow spindle (10) is connected to the honing rod (2), a push rod (11) is slidably provided in the hollow spindle (10), the lower end of which abuts against the push rod (4), and a push rod (11) is sleeved on the push rod (11) to reset the push rod (11) upward. A return spring (12), the driving device (1) comprising a vertical plate (13) arranged on a mounting plate (8), the vertical plate (13) being provided with a vertical guide rail (14) and a rotating motor (15), a slider (16) being slidably mounted on the vertical guide rail (14), a slide plate (17) being mounted on the slider (16), the rotating motor (15) being connected to the slide plate (17) via a ball screw mechanism, and a pressure block (18) being mounted on the slide plate (17) for pressing the upper end of the push rod (11).

6. The high-precision machining, reaming and honing machine for the inner hole of a sewing machine sleeve according to claim 5, characterized in that: A pressure sensor (19) for detecting the pressure of the push rod (11) is provided below the pressing block (18). The pressure sensor (19) is connected to the controller via wired or wireless communication, and the pressure sensor (19) transmits a pressure signal to the controller. The rotating motor (3) (15) is connected to the controller via wired or wireless communication. When the detection value of the pressure sensor (19) is greater than a set value, the controller controls the rotating motor (3) (15) to stop running. After the detection value of the pressure sensor (19) is less than the set value, the rotating motor (3) (15) continues to run.

7. The high-precision machining, reaming and honing machine for the inner hole of a sewing machine sleeve according to claim 6, characterized in that: A top plate (20) is fixed to the upper end of the push rod (11); the power device (1) is a rotating motor (2) arranged on a mounting plate (8); a driving wheel (21) is arranged on the rotating shaft of the rotating motor (7); a driven wheel (22) driven by the driving wheel (21) is sleeved on the upper end of the hollow main shaft (10); an assembly plate (23) is fixed above the driven wheel (22); a limiting column (24) for circumferentially limiting the top plate (20) is arranged on the assembly plate (23); the return spring (12) is arranged between the top plate (20) and the assembly plate (23); a pressure rod (25) is pressed on the upper end of the push rod (11); a radial bearing (26) is sleeved on the pressure rod (25); a bearing seat (27) is sleeved on the radial bearing (26); and the bearing seat (27) is mounted on the pressure sensor (19).

8. The high-precision machining, reaming and honing machine for the inner hole of a sewing machine sleeve according to claim 7, characterized in that: The upper end of the push rod (11) is sleeved with a thrust bearing (28) located above the top plate (20), and the pressure rod (25) is pressed onto the push rod (11) via the thrust bearing (28).

9. The high-precision machining, reaming and honing machine for the inner hole of a sewing machine sleeve according to claim 1, characterized in that: The end of the push rod (4) extending into the honing rod (2) is provided with a push rod inclined surface (29), the honing rod (2) is radially slidably provided with a wedge block (30), the side wall of the honing rod (2) is provided with a through hole for the wedge block (30) to extend out, the inner side of the wedge block (30) is provided with a wedge block inclined surface (31) matched with the push rod inclined surface (29), and the outer side is provided with the honing strip (3), the wedge block (30) and the honing strip (3) are each provided with one, and the outer side of the honing rod (2) is provided with a wear-resistant strip (32).

10. The high-precision machining, reaming and honing machine for the inner hole of a sewing machine sleeve according to claim 9, characterized in that: The honing rod (2) is sheathed with a limiting sleeve (33) driven by a third driving device to move along the axial direction of the honing rod (2); the third driving device is connected to a controller via a wired or wireless connection; when the honing device is not processing a workpiece, the limiting sleeve (33) is located on the outer periphery of the honing bar (3) to limit the wedge block (30) from falling; when the honing device is processing a workpiece, the limiting sleeve (33) is located on the outer periphery of the honing rod (2) without the honing bar (3).

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