阅读说明：本技术 一种料长自动检测筛选机及其使用方法和应用 (Automatic material length detection screening machine and use method and application thereof ) 是由 储士钊 王水平 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种料长自动检测筛选机及其使用方法和应用,属于检测技术领域。该设备包括料长检测机构、输料机构和侧排料机构；其中,所述输料机构用于间断性输送放置在其上的工件；所述料长检测机构位于所述输料机构的上侧,用于对输料机构输送至其所在位置的工件进行长度检测；所述侧排料机构设置于所述输料机构沿输送方向的一侧或两侧,并位于所述料长检测机构沿输送方向的后方。本发明通过输料机构、料长检测机构和侧排料机构的协同配合,可简单快速从一批量工件中筛选出符合要求的工件,便于后续车削工序车削量一致,在保证车削效率的同时,有效保护车削质量和车刀寿命。该设备尤其适用于洗衣机转轴经过冷挤压后的毛坯长度筛选中应用。(The invention discloses a material length automatic detection screening machine and a using method and application thereof, and belongs to the technical field of detection. The equipment comprises a material length detection mechanism, a material conveying mechanism and a side discharging mechanism; the conveying mechanism is used for conveying workpieces placed on the conveying mechanism discontinuously; the material length detection mechanism is positioned at the upper side of the material conveying mechanism and is used for detecting the length of the workpiece conveyed to the position of the material conveying mechanism by the material conveying mechanism; the side discharging mechanisms are arranged on one side or two sides of the conveying mechanism along the conveying direction and are positioned behind the material length detection mechanism along the conveying direction. According to the invention, through the cooperative matching of the material conveying mechanism, the material length detection mechanism and the side discharging mechanism, workpieces meeting the requirements can be simply and quickly screened from a batch of workpieces, so that the turning amount of the subsequent turning procedure is consistent, the turning efficiency is ensured, and the turning quality and the turning tool service life are effectively protected. The device is particularly suitable for screening the length of the blank of the rotating shaft of the washing machine after cold extrusion.)

1. The utility model provides a material length automated inspection sieve separator, includes frame (100) and installs material length detection mechanism (300) on frame (100), its characterized in that: the device also comprises a material conveying mechanism (200) and a side discharging mechanism (400) which are arranged on the rack (100); the material conveying mechanism (200) is used for conveying workpieces placed on the material conveying mechanism discontinuously; the material length detection mechanism (300) is positioned at the upper side of the material conveying mechanism (200) and is used for detecting the length of the workpiece conveyed to the position of the material conveying mechanism (200); the side discharging mechanisms (400) are arranged on one side or two sides of the material conveying mechanism (200) along the conveying direction and are positioned behind the material length detection mechanism (300) along the conveying direction; when the side discharging mechanism (400) works, if the length of the workpiece detected by the material length detection mechanism (300) exceeds a specified range, the workpiece is pushed out of the material conveying mechanism (200).

2. The automatic material length detecting and screening machine according to claim 1, characterized in that: the material conveying mechanism (200) comprises a material conveying seat (210) with a material conveying groove (220) and a feeding assembly (230); one end of the material conveying seat (210) is a material inlet end, and the other end of the material conveying seat is a material outlet end; the feeding assembly (230) is arranged at the feeding end of the feeding seat (210) and used for intermittently pushing the workpieces in the material conveying groove (220) at the feeding end of the feeding seat (210) to the discharging end.

3. The automatic material length detecting and screening machine according to claim 2, characterized in that: the feeding assembly (230) comprises a material pushing cylinder (231) arranged at the bottom of the material conveying seat (210) and a material pushing block (232) arranged in a material conveying groove (220) of the material conveying seat (210); the material pushing cylinder (231) and the material pushing block (232) are connected through a material pushing connecting piece (233) penetrating through a slotted hole in the material conveying seat (210).

4. The automatic material length detecting and screening machine according to claim 2, characterized in that: the upper edge of the material conveying seat (210) is provided with movable guide rods (250) through guide brackets (240) on two sides of the material conveying groove (220), and the distance between the guide rods (250) on two sides can be adjusted.

5. The automatic material length detecting and screening machine as claimed in claim 3, wherein: the front end of the cylinder barrel of the material pushing cylinder (231) is provided with a proximity inductive switch (234), and a screw hole is formed in the position, opposite to the proximity inductive switch (234), of the material pushing connecting piece (233) and screwed into an adjusting screw (235).

6. The automatic material length detecting and screening machine as claimed in claim 3, wherein: the material length detection mechanism (300) comprises an electronic ruler (340) which is arranged above a material conveying groove (220) of the material conveying seat (210) through a linear slide rail (330); the electronic ruler (340) detects the downward direction and is driven by the lifting driving cylinder (320).

7. The automatic material length detecting and screening machine as claimed in claim 6, wherein: the side discharging mechanism (400) comprises a discharging cylinder (420) and a discharging push block (440); the discharging cylinder (420) is supported and installed through a discharging bracket (410), the telescopic direction of the discharging cylinder faces to the material conveying mechanism (200), and the discharging cylinder is connected with a discharging push block (440) in a driving mode; the material conveying mechanism (200) is provided with a material discharging opening for the material discharging push block (440) to push the workpiece out.

8. The automatic material length detecting and screening machine according to claim 7, wherein: the material clamping mechanism (500) is used for clamping the workpiece detected by the material length detection mechanism (300); the material clamping mechanism (500) comprises a clamping cylinder (510) positioned on one side of the material conveying seat (210) and a material blocking block (530) positioned on the other corresponding position on the material conveying seat (210); the clamping cylinder (510) is connected with a clamping block (520) in a driving mode.

9. The use method of the automatic material length detecting and screening machine, which is used for detecting the length of the shaft part by the automatic material length detecting and screening machine of claim 8, comprises the following operation steps:

firstly, the shaft pieces to be detected are vertically arranged in parallel in a material conveying groove (220) of the material conveying seat (210) and are close to a material pushing block (232);

the feeding assembly (230) works, the material pushing cylinder (231) drives the material pushing block (232) to push the shaft piece to be detected forward to a detection position, and the shaft piece to be detected returns; while returning, another shaft to be detected is placed into the material conveying groove (220); the steps are repeated, so that the shaft piece to be detected can be intermittently pushed forwards, and one detection position is pushed each time;

thirdly, pushing a detection position forward each time, and sending a shaft piece to be detected to a position right below an electronic ruler (340) of the material length detection mechanism (300); the material clamping mechanism (500) works, and the clamping cylinder (510) drives the clamping block (520) to press the shaft piece located at the detection position on the material blocking block (530) for clamping;

after the shaft is clamped, an electronic ruler (340) of the material length detection mechanism (300) is driven by the lifting driving cylinder (320) to move downwards, contact with the upper end face of the shaft and return to obtain the length value of the shaft; if the length of the shaft exceeds the range of the set value, the side discharging mechanism (400) is operated, and the discharging cylinder (420) drives the discharging push block (440) to push the shaft away from the conveying seat (210) and return; if the length of the shaft piece is within the range of the set value, the side discharging mechanism (400) does not act, the shaft piece continues to be left on the material conveying seat (210) and is intermittently pushed forwards until the shaft piece is pushed out from the discharging end of the material conveying seat (210).

10. Use of the automatic material length detecting and screening machine of any one of claims 1 to 8 in the processing of washing machine shafts for detecting and screening cold extrusion washing machine shaft blanks meeting specified lengths.

Technical Field

The invention belongs to the technical field of detection, relates to equipment for detecting the length of a metal bar, and particularly relates to an automatic material length detection screening machine and a using method and application thereof.

Background

The shaft parts are indispensable transmission parts in mechanical equipment and are usually processed by metal bar materials. In the washing machine, a rotating shaft is an important part for supporting a roller, transmitting power and completing a washing function, the shaft of the washing machine has the characteristics of high-speed rotation and torque transmission when working, the working environment is severe, water vapor and dust exist generally, in addition, the shaft not only rotates forwards and backwards and bears alternating torque, but also ensures the rotation precision so as to reduce noise and achieve the required fatigue limit. Therefore, the requirements on the dimensional precision and the geometric precision of the rotating shaft of the washing machine are high, and the requirements on processing are also high.

The patent document (CN 109623298A) applied by the applicant previously about the production process of the rotating shaft of the washing machine is known to be subjected to blanking, grinding and peeling, cold extrusion, end face milling and central hole punching, turning and roll forming. The length of a blank can be increased in the cold extrusion process, the blank needs to be machined to a specified length through a subsequent turning process, but the length of each blank increased in the cold extrusion process is different and millimeter-scale fluctuation exists, the turning process basically adopts a machining center or special equipment to carry out automatic machining, the feed amount of turning is relatively fixed every time, if the length of the blank exceeds a set standard length, the turning tool is greatly damaged, and the machining quality and the service life are influenced; if the blank length is shorter than the set standard length, the machining efficiency is low. Therefore, the cold extrusion length of the blank directly influences the efficiency and quality of the subsequent turning procedure and the service life of the turning tool. Of course, the same problems apply to a general shaft member that is subjected to cold pressing and then to a milling operation, and the present applicant is not limited to the processing of the rotating shaft of the washing machine.

Disclosure of Invention

1. Problems to be solved

The invention provides an automatic material length detection screening machine, which aims to detect and screen out workpieces meeting the specified length from batch shaft blank so as to reduce the adverse effects of the shaft blank not meeting the specified length on the turning efficiency, the quality and the service life of a turning tool.

The invention also provides a using method of the material length automatic detection screening machine, which can simply and quickly screen out workpieces meeting the specified length from a batch of shaft workpiece blanks, and can also screen and collect workpieces which do not meet the length requirement. The device is particularly suitable for screening the length of the blank of the rotating shaft of the washing machine after cold extrusion.

In order to solve the problem of automatic detection of the length of a shaft, the automatic material length detection screening machine comprises a rack, and a material length detection mechanism, a material conveying mechanism and a side discharging mechanism which are arranged on the rack; the material conveying mechanism is used for conveying workpieces placed on the material conveying mechanism discontinuously; the material length detection mechanism is positioned at the upper side of the material conveying mechanism and is used for detecting the length of the workpiece conveyed to the position of the material conveying mechanism by the material conveying mechanism; the side discharging mechanisms are arranged on one side or two sides of the material conveying mechanism along the conveying direction and are positioned behind the material length detection mechanism along the conveying direction; when the side discharging mechanism works, if the length of the workpiece detected by the material length detection mechanism exceeds a specified range, the side discharging mechanism pushes the workpiece out of the material conveying mechanism.

Therefore, the automatic material length detection screening machine is characterized in that the material length detection mechanism and the side discharge mechanism are matched in a coordinated mode, a workpiece can be fed into the material length detection mechanism by the material conveying mechanism discontinuously at each time, after the material length detection mechanism detects the workpiece, the workpiece meeting the requirements can be left on the material conveying mechanism, the workpiece not meeting the requirements is pushed away from the material conveying mechanism by the side discharge mechanism, the workpiece meeting the requirements can be simply and quickly screened out from a batch of workpieces, the turning amount of subsequent turning procedures is consistent, the turning efficiency is guaranteed, and the turning quality and the service life of a turning tool are effectively protected.

The material conveying mechanism in the scheme can adopt a chain transmission mode, a belt transmission mode and the like, and as a preferred mode, the material conveying mechanism comprises a material conveying seat with a material conveying groove and a material feeding assembly; one end of the material conveying seat is a material inlet end, and the other end of the material conveying seat is a material outlet end; the feeding assembly is arranged at the feeding end of the feeding seat and used for intermittently pushing the workpiece in the feeding groove at the feeding end of the feeding seat to the discharging end. The feeding component comprises a material pushing cylinder arranged at the bottom of the material conveying seat and a material pushing block arranged in a material conveying groove of the material conveying seat; the material pushing cylinder and the material pushing block are connected through a material pushing connecting piece penetrating through a slotted hole in the material conveying seat. According to the structure, the material conveying seat can reliably support materials, the level height is guaranteed to be unchanged, the feeding assembly can realize intermittent forward pushing of the workpieces through force transmission between the workpieces while the workpieces are machined, a detection position is pushed every time, and effective detection and screening are conducted when only a single workpiece is located at a position detectable by the material length detection mechanism.

On the basis of the structure of the feeding assembly, the front end of the cylinder barrel of the material pushing cylinder is provided with a proximity inductive switch, and a screw hole is formed in the position, opposite to the proximity inductive switch, of the material pushing connecting piece and is screwed in an adjusting screw. The feeding amount of the workpiece pushed forwards by the feeding assembly at each time can be adjusted by the adjusting screw, and the requirement on the pushing distance of workpieces with different diameters is met.

Furthermore, movable guide rods are mounted on the conveying seat along the two sides of the conveying chute through guide supports, and the distance between the guide rods on the two sides can be adjusted, so that a single workpiece can stably move forwards in the conveying chute, cannot swing left and right, and can be accurately detected.

The material length detection mechanism in the scheme can be realized by adopting a distance sensor, laser ranging and other modes, and as a preferred mode, the material length detection mechanism comprises an electronic ruler which is arranged above a material conveying groove of the material conveying seat through a linear slide rail; the electronic ruler is downward in detection direction and is driven by the lifting driving cylinder. When a workpiece to be detected enters a detection position, the lifting driving cylinder drives the electronic ruler to move downwards to contact the workpiece, so that the length of the workpiece is detected.

As an implementation mode of the side discharging mechanism in the scheme, the side discharging mechanism comprises a discharging cylinder and a discharging push block; the discharging cylinder is supported and installed through a discharging support, the telescopic direction of the discharging cylinder faces to the material conveying mechanism, and the discharging cylinder is connected with a discharging push block in a driving mode; the material conveying mechanism is provided with a material discharging opening for pushing the workpiece out by the material discharging push block. When the detected workpiece does not meet the specified requirements, the side discharging mechanism can push the workpiece out of the material conveying mechanism, so that only the workpiece meeting the specified length requirement is reserved, and the screening purpose is achieved.

As a further improvement, the automatic material length detecting and screening machine further comprises a material clamping mechanism for clamping the workpiece detected by the material length detecting mechanism; the material clamping mechanism comprises a clamping cylinder positioned on one side of the material conveying seat and a material blocking block positioned on the corresponding position on the other side of the material conveying seat; the clamping cylinder is connected with the clamping block in a driving mode. When in detection, the workpiece is clamped by the material clamping mechanism so as to ensure reliable detection.

In order to realize the detection of the workpiece by adopting the automatic material length detection screening machine, the invention provides a using method of the automatic material length detection screening machine, which is used for detecting the length of the workpiece, and comprises the following operation steps:

firstly, vertically placing the shaft pieces to be detected into a material conveying groove of the material conveying seat side by side, and closely attaching the shaft pieces to a material pushing block;

secondly, the feeding assembly works, the material pushing cylinder drives the material pushing block to push a shaft piece to be detected forward to a detection position, and the shaft piece to be detected returns; while returning, another shaft to be detected is placed into the material conveying groove; the steps are repeated, so that the shaft piece to be detected can be intermittently pushed forwards, and one detection position is pushed each time;

thirdly, pushing a detection position forward each time, and sending a shaft piece to be detected to a position right below an electronic ruler of the material length detection mechanism; the material clamping mechanism works, and the clamping cylinder drives the clamping block to tightly press the shaft piece positioned at the detection position on the material blocking block for clamping;

after the shaft is clamped, the electronic ruler of the material length detection mechanism is driven by the lifting driving cylinder to move downwards, contact the upper end face of the shaft and return to obtain the length value of the shaft; if the length of the shaft exceeds the range of the set value, the side discharging mechanism acts, and the discharging cylinder drives the discharging pushing block to push the shaft away from the conveying seat and return; if the length of the shaft piece is within the range of the set value, the side discharging mechanism does not act, the shaft piece continues to be left on the material conveying seat and is intermittently pushed forwards until the shaft piece is pushed out from the discharging end of the material conveying seat.

The material length automatic detection screening machine is particularly suitable for being applied to processing of the washing machine rotating shaft and used for detecting and screening cold extrusion washing machine rotating shaft blanks meeting the specified length.

Drawings

FIG. 1 is a schematic perspective view of an automatic material length detecting and screening machine according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a front view of the automatic material length detecting and screening machine of the present invention;

FIG. 4 is a top view of the automatic material length detecting and screening machine of the present invention;

FIG. 5 is an enlarged partial view of B in FIG. 4;

FIG. 6 is an enlarged partial view of a portion of the feed assembly of the automated length of material screening machine of the present invention as viewed from below;

FIG. 7 is a view showing the operation state of the automatic material length detecting and screening machine according to the present invention;

fig. 8 is a partial enlarged view of C of fig. 7.

The reference numerals in the drawings denote:

100. a frame;

200. a material conveying mechanism; 210. a material conveying seat; 220. a material conveying groove; 230. a feed assembly; 231. a material pushing cylinder; 232. a material pushing block; 233. a material pushing connecting piece; 234. a proximity sensing switch; 235. an adjusting screw; 240. a guide bracket; 250. a guide bar;

300. a material length detection mechanism; 310. detecting a support frame; 320. a lift drive cylinder; 330. a linear slide rail; 340. an electronic ruler;

400. a side discharge mechanism; 410. a discharge support; 420. a discharging cylinder; 430. a discharge guide rod; 440. a material discharging push block;

500. a material clamping mechanism; 510. a clamping cylinder; 520. a clamping block; 530. a material blocking block;

600. a blanking guide; 610. a chute.

Detailed Description

The invention is further described with reference to specific examples.

As shown in fig. 1, fig. 3 and fig. 4, the automatic material length detecting and screening machine of the present embodiment mainly includes a material conveying mechanism 200, a material length detecting mechanism 300, a side discharging mechanism 400 and a material clamping mechanism 500, which are organically combined together and all installed on a rack 100 as a supporting base. The batch length detection mechanism 300 is used for detecting only one workpiece at a time, and the batch length detection mechanism does not adopt continuous conveying but adopts intermittent conveying; the material length detection mechanism 300 is arranged above the material conveying mechanism 200 and is used for detecting the length of the workpiece conveyed to the position of the material conveying mechanism 200 by the material conveying mechanism; the material clamping mechanism 500 is arranged at the outer side of the material conveying mechanism 200 corresponding to the position of the detection position of the material length detection mechanism 300 and is used for clamping the workpiece detected by the material length detection mechanism 300; the side discharging mechanism 400 is disposed on one side or both sides of the material conveying mechanism 200 along the conveying direction, and is located behind the material length detecting mechanism 300 along the conveying direction, for pushing the workpiece detected by the material length detecting mechanism 300 and not meeting the specification away from the material conveying mechanism 200, so as to achieve the purpose of screening.

Therefore, the automatic material length detection screening machine can be used for feeding a workpiece into the material length detection mechanism 300 at one time discontinuously by the material conveying mechanism 200 through the cooperative matching of the material conveying mechanism 200, the material length detection mechanism 300 and the side discharging mechanism 400, after the material length detection mechanism 300 detects the workpiece, the workpiece meeting the requirement can be left on the material conveying mechanism 200, the workpiece not meeting the requirement is pushed away from the material conveying mechanism 200 by the side discharging mechanism 400, and the workpiece meeting the requirement can be simply and quickly screened out from a batch of workpieces, so that the turning amount of the subsequent turning process is consistent, the turning efficiency is ensured, and the turning quality and the service life of a turning tool are effectively protected. The structure of each part will be described in detail below.

The conveying mechanism 200 may be implemented in a conventional manner, such as a chain transmission manner, a belt transmission manner, etc., as a conveying mechanism for the workpiece. In the preferred embodiment, as shown in fig. 2, 3, 5 and 6, the feeding mechanism 200 includes a feeding base 210 having a feeding chute 220, and a feeding assembly 230. That is, the cross section of the material conveying base 210 is U-shaped, the bottom of the groove is a horizontal plane to ensure that the height position of the workpiece is not changed in the conveying process, and one end of the material conveying base 210 is a feeding end, and the other end is a discharging end, and the workpiece is placed into the material conveying base from the feeding end and is sent to the discharging end. In order to push the workpiece forward in the feeding chute 220, the feeding assembly 230 is disposed at the feeding end of the feeding base 210, and is configured to intermittently push the workpiece in the feeding chute 220 at the feeding end of the feeding base 210 to the discharging end. As an implementation manner, the feeding assembly 230 includes a material pushing cylinder 231 disposed at the bottom of the material conveying seat 210, and a material pushing block 232 disposed in the material conveying groove 220 of the material conveying seat 210, and the material pushing cylinder 231 and the material pushing block 232 are connected by a material pushing connecting member 233 passing through a slotted hole of the material conveying seat 210. The feeding assembly 230 can intermittently push the workpieces forward through force transmission among the workpieces while processing the workpieces, and pushes one detection position every time, so that only one workpiece is located at the position detectable by the material length detection mechanism 300 every time, and effective detection and screening can be performed. The material pushing cylinder 231 can adopt an oil cylinder, an air cylinder or a linear motor, and the air cylinder is preferred here, so that the implementation is easy. In addition, one end of the material pushing block 232, which is in contact with the workpiece, is provided with a V-shaped groove, so that the workpiece can be pushed reliably.

As shown in fig. 6, based on the structure of the feeding assembly 230, the front end of the cylinder of the pushing cylinder 231 is provided with a proximity inductive switch 234, and a screw hole is formed in the pushing connector 233 opposite to the proximity inductive switch 234 and screwed into the adjusting screw 235. The feeding amount of the feeding assembly 230 for pushing the workpiece forward each time can be adjusted through the adjusting screw 235, so that the requirement of pushing distance of workpieces with different diameters is met.

In order to ensure reliable conveying of workpieces in the conveying chute 220, movable guide rods 250 are mounted on the conveying seat 210 along two sides of the conveying chute 220 through guide brackets 240, namely, adjusting pin shafts fixed on the guide rods 250 are inserted into adjusting holes in the guide brackets 240 and locked through screws, so that the distance between the guide rods 250 on two sides can be adjusted, a single workpiece moves forwards stably in the conveying chute 220, the workpiece cannot shake left and right, and accurate detection can be guaranteed.

The structural mode that can realize the long detection mechanism 300 function is more, for example adopts range finding modes such as distance sensor, laser rangefinder, and the contact range finding mode of electronic ruler 340 is adopted to this embodiment. As shown in fig. 1 and 2, the material length detecting mechanism 300 includes a detecting support frame 310 mounted on the machine frame 100, and a lifting driving cylinder 320 and an electronic ruler 340 mounted on the detecting support frame 310. The electronic ruler 340 is disposed above the feeding chute 220 of the feeding base 210 through the linear slide rail 330, and is driven by the lifting cylinder 320. When the workpiece to be detected enters the detection position, the lifting driving cylinder 320 drives the electronic ruler 340 to move downwards to contact the workpiece, so that the length of the workpiece is detected. Of course, an electrical cabinet is arranged on the rack 100 on one side of the feeding mechanism 200, and an electrical control component is arranged in the electrical cabinet to realize detection control of the electronic ruler 340 and control the whole device to realize automation.

The side discharging mechanism 400 is used for pushing the workpiece out of the material conveying mechanism 200 if the material length detecting mechanism 300 detects that the length of the workpiece exceeds the specified range during operation, and the achievable modes are more. As shown in fig. 2, in the present embodiment, the side discharge mechanism 400 includes a discharge cylinder 420 and a discharge pusher 440; wherein, the discharging cylinder 420 is supported and installed on the frame 100 through the discharging bracket 410, and its telescopic direction is opposite to the feeding mechanism 200, here vertical to the feeding direction, and is drivingly connected with the discharging push block 440. The feeding base 210 of the feeding mechanism 200 has a discharge opening for the discharge pusher 440 to push out the workpiece. When the detected workpieces do not meet the specified requirements, the workpieces can be pushed out of the material conveying mechanism 200 through the side discharging mechanism 400, so that only the workpieces meeting the specified length requirements are reserved, and the purpose of screening is achieved. In order that the side discharging mechanism 400 does not separate when pushing the workpiece, the discharging pushing block 440 is vertically provided with a groove matching with the outer surface of the workpiece, and the workpiece can be accommodated in the groove so as not to separate from the discharging pushing block 440. In order to ensure the stability and reliability of the extension and retraction of the material discharge push block 440, a material discharge guide rod 430 is movably mounted on the material discharge bracket 410 through a guide sleeve, and the front end of the material discharge guide rod 430 is connected with the material discharge push block 440.

It is worth noting that the workpieces are either shorter or longer than the prescribed length, except within the prescribed length range, and therefore, it is also useful how to distinguish them. When the work is long, the cutting feed amount can be reduced at the time of subsequent cutting, and when the work is short, the feed amount can be increased. Therefore, in this embodiment, two side discharging mechanisms 400 are respectively disposed on two sides of the material conveying mechanism 200, and are used for discharging the long material and the short material respectively, so as to perform more detailed screening. Meanwhile, as shown in the figure, the blanking guide 600 is installed on the frame 100 on both sides of the feeding mechanism 200, and the workpiece discharged from the discharge port on the feeding base 210 falls into the blanking guide 600, and the blanking guide 600 has a downward chute 610, and the workpiece rolls off from the chute 610 and is collected.

In addition, in order that the material length detecting mechanism 300 can perform accurate measurement on the workpiece at a time, the material clamping mechanism 500 is provided at the measurement position. As shown in fig. 2, the material clamping mechanism 500 includes a clamping cylinder 510 located at one side of the material conveying seat 210, and a material stop block 530 located at a corresponding position at the other side of the material conveying seat 210; the clamping cylinder 510 drives the connecting clamping block 520. During detection, the workpiece is clamped by the material clamping mechanism 500, so that reliable detection is ensured.

The structure of the automatic material length detecting and screening machine is described in detail above, and in order to detect a workpiece by using the automatic material length detecting and screening machine, the use method of the automatic material length detecting and screening machine is described by taking the example of the application of the automatic material length detecting and screening machine in the processing of the rotating shaft of the washing machine for detecting and screening the rotating shaft blank of the cold extrusion washing machine which meets the specified length. With reference to fig. 7 and 8, the specific operation steps are as follows:

firstly, adjusting the distance between guide rods 250 on two sides of a material conveying seat 210 according to the diameter of a shaft to be detected, and only allowing one shaft to be placed for a distance; the shaft to be detected is vertically placed into the material conveying groove 220 and is placed next to the material pushing block 232;

secondly, the feeding assembly 230 works, the material pushing cylinder 231 drives the material pushing block 232 to push the shaft piece to be detected forward to a detection position and return; while returning, another shaft to be detected is placed into the material conveying groove 220; repeatedly, the shaft piece to be detected can be discontinuously pushed forwards through force transmission among the workpieces, and a detection position distance, namely a diameter distance of the shaft piece, is pushed each time;

thirdly, each time, a detection position distance is pushed forwards, and a shaft piece to be detected is sent to a position right below the electronic ruler 340 of the material length detection mechanism 300; at this time, the material clamping mechanism 500 works, and the clamping cylinder 510 drives the clamping block 520 to press the shaft member located at the detection position onto the material blocking block 530 for clamping;

after the shaft is clamped, the electronic ruler 340 of the material length detection mechanism 300 descends under the driving of the lifting driving cylinder 320, contacts the upper end face of the shaft and returns to obtain the length value of the shaft; if the length of the shaft is shorter than the set value range, one of the side discharging mechanisms 400 is operated, the discharging cylinder 420 drives the discharging push block 440 to push the shaft away from the material conveying seat 210, the shaft falls into the chute 610 of the discharging guide 600, the shaft rolls into the charging basket, and the discharging push block 440 returns; if the length of the shaft is longer than the set value range, the other side discharging mechanism 400 acts, and the shaft falls into the charging basket on the other side; if the length of the shaft is within the range of the set value, the side discharging mechanism 400 does not act, the shaft continues to be left on the material conveying seat 210 and is intermittently pushed forwards until the shaft is pushed out from the discharging end of the material conveying seat 210 and falls into a charging basket to be collected.

As can be seen from the above, the cold extrusion blank shaft pieces of the rotating shaft of the washing machine are continuously pushed forwards intermittently and are detected one by one, and the shaft pieces with different lengths are effectively screened. Of course, the material length automatic detection screening machine of this embodiment is not limited to the detection of washing machine pivot cold extrusion blank axle piece, and any other axle piece can all realize detecting the screening.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.