A material discharging machine

Abstract

The application relates to a material discharging machine and belongs to the technical field of material discharging. The machine comprises a conveying channel, a receiving channel, a receiving table and a pushing mechanism. The receiving table is used for continuously placing workpieces and discharging materials. The receiving channel is arranged on one side of the receiving table and is used for receiving input workpieces. The receiving channel forms multiple rows of workpieces at a time, and each row contains only one workpiece. The conveying channel continuously sends workpieces to the receiving channel. The receiving table is provided with a blocking assembly which can operate and limit the conveying of the workpieces at the end of the conveying channel. The pushing mechanism is installed on the receiving table and continuously pushes the workpieces in the receiving channel forward. The pushing mechanism comprises a pushing driving element, a pushing block and a protection block. The pushing block is driven by the pushing driving element to push the workpieces in the receiving channel forward. The protection block is slidably installed on the receiving table. The protection block is located on the front side of the conveying channel and abuts against the frontmost row of workpieces. The sliding direction of the protection block is consistent with the pushing direction of the pushing driving element. The application has the effect of automatically discharging ring materials.

Description

Technical Field

[0001] This application relates to the field of material discharge, and in particular to a material discharge machine. Background Technology

[0002] Whether during processing or transportation, workpieces will be collected to facilitate transfer between different processes or subsequent processing or assembly. This process requires workpiece arrangement.

[0003] There is a type of ring-shaped workpiece as shown in the attached figure. Figure 1 As shown, it includes a small circular portion 61 and a large circular portion 62 separated at the front and back. The inner and outer diameters of the large circular portion 62 are larger than the inner and outer diameters of the small circular portion 61. The part between the small circular portion 61 and the large circular portion 62 is funnel-shaped, so that the inner and outer diameters of the large circular portion 62 and the small circular portion 61 gradually decrease.

[0004] In order to discharge the above-mentioned workpieces in multiple rows, with the front and rear ends of each row of workpieces abutting each other, so as to facilitate subsequent whole-area transfer or whole-row workpiece transfer, this application provides a discharge machine. Utility Model Content

[0005] To achieve automatic feeding of circular workpieces, this application provides a feeding machine.

[0006] The material discharge machine provided in this application adopts the following technical solution:

[0007] A feeding machine includes a conveying channel, a receiving channel, a receiving platform, and a pushing mechanism. The receiving platform continuously accepts and discharges workpieces. The receiving channel, located on one side of the receiving platform, continuously receives input workpieces. The receiving channel forms multiple rows at a time, with each row containing only one workpiece. A limiting plate is provided on the side of the receiving channel away from the conveying channel. The conveying channel continuously feeds workpieces one by one into the receiving channel. The receiving platform is equipped with a blocking component that can be operated to restrict the conveying of workpieces at the end of the conveying channel. The pushing mechanism is installed on the receiving platform and continuously pushes the workpieces in the receiving channel forward. The pushing mechanism includes a pushing drive, a pushing block, and a protective block. The pushing block, driven by the pushing drive, pushes the workpieces at the receiving channel position forward. The protective block is slidably installed on the receiving platform. The protective block is located on the front side of the conveying channel and abuts against the foremost row of workpieces. The sliding direction of the protective block is consistent with the pushing direction of the pushing drive.

[0008] By adopting the above technical solution, workpieces are continuously sent one by one to the receiving channel through the conveying channel. The workpieces are arranged in rows of one workpiece in the receiving channel. Then, the pushing block is driven by the pushing drive to push the row of workpieces forward, continuously forming rows of workpieces in the receiving channel. The workpieces are continuously pushed forward, and finally the multi-row and multi-column material discharge process is completed. Since the workpiece is in a ring-like shape, it can be rolled in, which makes the conveying process more convenient. With the presence of the protective block, the workpiece maintains a stable state during the forward pushing and discharge process on the receiving platform, making it less likely for the workpiece to fall over when pushed forward.

[0009] Optionally, the pushing mechanism further includes a support block that abuts against and supports the workpiece. The support block moves and causes the workpiece in the receiving channel to move downward and detach from the conveying channel.

[0010] By adopting the above technical solution, the workpiece in the conveying channel is supported by the setting of the support block, so that the workpiece will not fall out of the conveying channel. Then, when the support block moves, the workpiece in the receiving channel falls. After the workpiece leaves the receiving channel, it can be easily pushed forward. This ensures that the structure that restricts the workpiece in the conveying channel and the working condition of pushing the workpiece forward will not interfere with each other. The structure is more reasonable, and the input of the workpiece is smooth and the pushing of the workpiece is also smooth.

[0011] Optionally, the pushing block is connected to the supporting block, and the pushing block drives the supporting block to move backward and then forward to push the workpiece below the receiving channel.

[0012] By adopting the above technical solution, the structure is more reasonable. Compared with the separate control of the support block, the support block can move backward or downward on its own, and only one control device is needed. The correlation is stronger. The support block, driven by the push block, is the part that directly pushes the workpiece. The support block and the push block will not interfere with each other.

[0013] Optionally, the blocking assembly includes a blocking block, a push spring, and an external pull drive. The push spring causes the blocking block to always have one end extending into the conveying channel, and the external pull drive causes the blocking block to overcome the elastic force of the push spring and disengage its end from the conveying channel.

[0014] By adopting the above technical solution, the blocking block has the characteristic of automatic blocking when it is not subjected to external force, making obstruction of conveying the basic state. Even if the external pull drive component fails, there will be no easy situation of mutual interference and equipment damage, thus improving safety.

[0015] Optionally, the blocking assembly includes a blocking block, a push spring, and an external pull drive. The push spring causes the blocking block to always have one end extending into the conveying channel. The external pull drive includes an external pull lever, the middle of which is rotatably mounted on the receiving platform. One end of the external pull lever is associated with the blocking block, and the other end is associated with the push block.

[0016] By adopting the above technical solution, the process of the blocking component blocking the workpiece input is linked to the pushing process of the pushing drive component. With the presence of the support block, the process of the support block moving backward is the process of the blocking component blocking the workpiece. At this time, the restriction of the bottom of the conveying channel by the support block no longer exists, and the workpiece in the conveying channel falls out of the conveying channel, but the workpiece will not continue to be input into the conveying channel. Then, the process of the support block moving forward is linked to the process of the blocking component no longer blocking the workpiece input. At this time, the support block resets and restricts the input workpiece into the conveying channel. The correlation is stronger and more reasonable, and the work is continuously cycled to achieve material discharge.

[0017] Optionally, the receiving platform is provided with a first conveying block and a second conveying block, and the conveying channel is formed between the first conveying block and the second conveying block. The distance between the second conveying block and the platform of the receiving platform is sufficient for the workpiece to move forward and pass through. The distance between the first conveying block and the second conveying block is greater than the axial length of the workpiece. When the support block moves forward to the limit of its stroke, the distance between the outer wall of the support block and the first conveying block is greater than the distance between the second conveying block and the first conveying block.

[0018] By adopting the above technical solution, it is ensured that the workpiece is smoothly input into the conveyor channel.

[0019] Optionally, the surface of the receiving platform for placing the workpiece is designated as a receiving surface, which is an inclined surface, and the height of the receiving surface gradually decreases from the side away from the limiting plate towards the limiting plate.

[0020] By adopting the above technical solution, the receiving surface is set at an angle, so that the limiting plate on the lower side can prevent the workpiece from leaving the receiving table. At the same time, the angled receiving surface means that the receiving channel is parallel to the receiving surface, which can ensure that the workpiece is smoothly input under the action of gravity. Setting up the receiving channel is more convenient and easier to implement.

[0021] Optionally, the protective block is placed on the receiving platform and moved forward under the push of the workpiece.

[0022] By adopting the above technical solution, it is convenient to remove the protective block and to transfer the workpieces on the receiving table. It is mainly convenient to transfer them in series, and the protective block is not easy to get stuck during the sliding process on the receiving table.

[0023] In summary, the workpieces are continuously fed into the receiving channel one by one through the conveying channel. The workpieces are arranged in rows of one in each row in the receiving channel. Then, the pushing block, driven by the pushing drive, pushes this row of workpieces forward, continuously forming rows of workpieces in the receiving channel. The workpieces are continuously pushed forward, and finally the multi-row and multi-column workpiece discharge process is completed. Because the workpieces are in a near-circular shape, they can be rolled in, which makes the conveying process more convenient. With the presence of the protective block, the workpieces maintain a stable state during the forward discharge process on the receiving platform, making it less likely for the workpieces to fall over. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the workpiece structure in an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the structure of the feeding machine in the embodiments of this application. Figure 1 .

[0026] Figure 3 This is a schematic diagram of the structure of the feeding machine in the embodiments of this application. Figure 2 .

[0027] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0028] Figure 5 This is a schematic diagram of the structure of the feeding machine in the embodiments of this application. Figure 3 .

[0029] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0030] Figure 7 yes Figure 5 Enlarged view of point C in the middle.

[0031] Explanation of reference numerals in the attached drawings: 1. Input component; 11. Conveying channel; 12. External section; 121. Receiving steel plate; 122. Barrier bar; 13. Transfer section; 131. Transfer base plate; 132. Angle steel side plate; 133. Blocking side plate; 134. Blocking hole; 2. Receiving component; 21. Receiving channel; 22. First conveying block; 23. Second conveying block; 24. Sealing block; 3. Blocking component; 31. Blocking block; 311. Blocking bar; 312. Stop block; 313. External pull ring groove; 32. Mounting block; 321, Spring mounting slot; 33, Push spring; 34, External pull drive component; 341, External pull lever; 3411, External pull notch; 342, Force application column; 35, Mounting protrusion; 4, Receiving platform; 41, Receiving block; 42, Receiving surface; 43, Limiting plate; 44, Base; 45, Receiving plate; 5, Pushing mechanism; 51, Pushing drive component; 52, Pushing support block; 521, Pushing block; 522, Support block; 53, Protective block; 61, Small round part; 62, Large round part. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 2-7 This application will be described in further detail.

[0033] This application discloses a material feeding machine.

[0034] Reference Figure 2 and Figure 3 A material discharge machine includes an input component 1, a receiving component 2, a blocking component 3, a receiving platform 4, and a pushing mechanism 5. The input component 1 forms a conveying channel 11 to sequentially input single workpieces into the receiving channel 21 formed by the receiving component 2. The receiving component 2 and the pushing mechanism 5 are installed on one side of the upper platform of the receiving platform 4. The pushing mechanism 5 pushes the workpieces on the receiving platform 4 corresponding to the receiving component 2 outward. The workpieces are continuously pushed outward to the other side of the upper platform of the receiving platform 4 away from the receiving component 2, thereby realizing the material discharge process on the upper platform of the receiving platform 4.

[0035] Reference Figure 3 and Figure 4 The input component 1 specifically includes an external section 12 and a transfer section 13. The external section 12 is not directly connected to the receiving station 4. The external section 12 transports the workpiece output from the previous process to the transfer section 13. The external section 12 mainly includes a bottom receiving steel plate 121 and a barrier bar 122 installed on the receiving steel plate 121. The middle of the receiving steel plate 121 protrudes downward to form a groove. There are two types of barrier bars 122, which are divided into two sides. Each set of barrier bars 122 has multiple bars from bottom to top and is installed in the groove position in the middle of the receiving steel plate 121. Multiple barrier bars 122 are installed above the receiving steel plate 121 through a fixing structure. A conveying channel 11 for workpieces to pass through is formed between the two sets of barrier bars 122. The space between the two sets of barrier bars 122 is only enough for one workpiece to roll through.

[0036] The transfer section 13 is installed on the edge of the receiving platform 4. The transfer section 13 includes a transfer base plate 131, an angle steel side plate 132, and a blocking side plate 133. The transfer base plate 131 is suspended above the side wall of the receiving platform 4 by a 90-degree angle steel. The blocking side plate 133 and the angle steel side plate 132 are respectively located on both sides of the transfer base plate 131. A conveying channel 11 is formed between the blocking side plate 133 and the angle steel side plate 132, which directly connects to the receiving channel 21.

[0037] The blocking assembly 3 includes a blocking block 31, a mounting block 32, a push spring 33, and an external pull drive component 34. The mounting block 32 extends out and is fixed to the blocking side plate 133 with screws. The blocking block 31 includes a blocking rod 311 and a stop block 312. The blocking rod 311 is a two-section stepped cylinder. The end of the blocking rod 311 with a smaller diameter slides through the mounting block 32. The blocking side plate 133 has a blocking hole 134 for the stop block 312 to slide and install. The stop block 312 slides through the blocking hole 134 and partially protrudes into the conveying channel 11 on one side of the blocking side plate 133 to block the workpiece. The end of the blocking rod 311 that slides through the mounting block 32 is connected to the stop block 312. 12 screws are used for fixing. The mounting block 32 has a spring mounting groove 321 that communicates with the blocking hole 134 on the side near the blocking side plate 133. The push spring 33 is fitted onto the blocking rod 311 and located in the spring mounting groove 321. The push spring 33 is clamped between the baffle and the groove wall of the spring mounting groove 321. The larger diameter end of the blocking rod 311 abuts against the mounting block 32 to limit the stroke of the baffle protruding out of the conveying channel 11. The push spring 33 drives the blocking block 312 to always have one end extending into the conveying channel 11. The external pull drive member 34 drives the larger end of the blocking rod 311 to overcome the elastic force of the push spring 33 and the baffle is disengaged from the conveying channel 11.

[0038] The workpiece falls into the receiving channel 21 and is removed from the obstruction of the receiving component 2. Specifically, the pushing mechanism 5 pushes the workpiece below the receiving channel 21 forward. The pushing mechanism 5 includes a pushing drive 51, a pushing support block 52, and a protective block 53. In this embodiment, the pushing drive 51 can be a hydraulic cylinder or a pneumatic cylinder. The pushing drive 51 is installed on one side edge of the receiving platform 4, and the piston rod of the pushing drive 51 faces the inside of the receiving platform 4. The pushing support block 52 is installed on the piston rod of the pushing drive 51 and is driven by the pushing drive 51. The pushing support block 522 includes a pushing block 521 and a support block 522. The pushing block 521 is directly installed and fixed on the pushing support block 53. On piston rod 2, the height of support block 522 is lower than the height of push block 521. The lower part of push block 521 extends two protruding parts towards the sides of the side wall of support block 522 and connects with support block 522. Support block 522 is located below receiving channel 21 and supports the workpiece in receiving channel 21 to form a complete receiving channel 21. Push drive 51 drives push support block 52 to move backward, so that the workpiece above support block 522 is no longer supported and falls from receiving channel 21 onto receiving table 4. When push drive 51 drives support block 522 to move forward, it pushes the workpiece forward to the remaining area of ​​receiving table 4, and the cycle repeats to achieve material discharge.

[0039] The protective block 53 is slidably installed on the receiving table 4. The protective block 53 and the pusher drive 51 are respectively located on both sides of the receiving assembly 2. The protective block 53 abuts against the front row of workpieces, and the sliding direction of the protective block 53 is consistent with the pushing direction of the pusher drive 51. This allows the pusher drive 51 to push the workpieces forward through the support block 522, and at the same time pushes the front protective block 53 forward as well.

[0040] The blocking assembly 3 and the pushing drive 51 are located on the same side of the receiving assembly 2 on the receiving platform 4. The aforementioned external pulling drive 34 includes an external pulling lever 341, a force-applying column 342, and a pushing block 521 of the pushing mechanism 5. The external pulling lever 341 is rotatably mounted on the receiving platform 4 at its middle part. One end of the external pulling lever 341 has an external pulling notch 3411, and the end of the blocking lever 311 with a larger diameter has an external pulling ring groove 313. The external pulling lever 341 is engaged with the external pulling ring groove 313 through the external pulling notch 3411. The pushing block 521 has a mounting protrusion 35 extending outward from the side near the external pulling lever 341, which applies force. The column 342 is fixed to the mounting protrusion 35 and one end protrudes to abut against the side wall of the outer pull rod 341 away from the receiving assembly 2. When the push block 521 moves forward and drives the support block 522 to push the workpiece, the outer pull rod 341 drives the stop block 312 on the blocking rod 311 to overcome the elastic force of the push spring 33 and disengage from the conveying channel 11. This realizes the synchronous connection of multiple steps such as the workpiece moving outward, the support block 522 resetting, and the continued conveying of the workpiece. When the push block 521 moves backward, it drives the support block 522 to disengage from the lower area of ​​the receiving channel 21, realizing the process of blocking the workpiece input and the workpiece falling in the receiving channel 21.

[0041] Reference Figure 5 and Figure 6 The aforementioned receiving component 2 specifically includes a first conveying block 22 and a second conveying block 23, forming a conveying channel 11 between the first conveying block 22 and the second conveying block 23. The first conveying block 22 is positioned near the pusher drive component 51, and the second conveying block 23 is positioned near the protective block 53. The first conveying block 22 is suspended and fixed to the receiving table 4 by a bracket, while the upper part of the second conveying block 23 is mounted and fixed to the first conveying block 22 by a block-shaped component, so that the second conveying block 23 is also suspended on the receiving table 4. Below the conveying channel 11, there are no other interfering components besides the support block 522. A sealing block 24 is installed at the end of the first conveying block 22 and the second conveying block 23 away from the input component 1 to prevent the workpiece from leaving the receiving channel. The distance between the second conveying block 23 and the table surface of the receiving platform 4 is sufficient for the workpiece to move forward and pass through. The distance between the first conveying block 22 and the second conveying block 23 is greater than the axial length of the workpiece. At the same time, the receiving channel 21 forms multiple rows at one time, and each row contains only one workpiece. When the support block 522 moves forward to the limit of its stroke, the distance between the outer wall of the support block 522 and the first conveying block 22 is greater than the distance between the second conveying block 23 and the first conveying block 22, ensuring that the workpiece is smoothly conveyed into the receiving channel 21. Due to the presence of the workpiece in the receiving channel 21, when the support block 522 moves backward, the workpiece in the receiving channel 21 blocks the previous workpiece, so that the backward movement of the support block 522 will not affect the stability of the previous workpiece.

[0042] The receiving platform 4 is equipped with corresponding electrical equipment. The receiving platform 4 has a receiving block 41 fixedly installed on its surface. The upper side wall of the receiving block 41 is inclined and serves as the receiving surface 42. The side wall of the higher side of the receiving block 41 is at a 90-degree angle to the upper side wall of the receiving block 41. The receiving component 2, the blocking component 3, and the pushing mechanism 5 are all installed on the receiving surface 42. The external section 12 is installed on the side wall of the higher side of the receiving block 41. The conveying channel 11 to the receiving channel 21 also goes from low to high, so that the workpiece is continuously input to the lowest point of the receiving channel 21 under the action of gravity. A limiting plate 43 is provided on the lower side of the receiving surface 42, so that the workpiece remains stable and does not easily roll off the receiving platform 4 when it is continuously pushed to the open area on the receiving block 41 to complete the discharge.

[0043] Specifically, the aforementioned protective block 53 is placed directly on the receiving surface 42, and the end face of the protective block 53 near the limiting plate 43 abuts against the limiting plate 43, so that the protective block 53 can move together with the workpiece on the receiving surface 42 when the workpiece moves forward.

[0044] Reference Figure 5 and Figure 7 In another embodiment, to achieve the transfer of the entire workpiece area, the receiving block 41 includes a base 44 and a receiving plate 45. Due to the inclination of the receiving surface 42, the groove on the base 44 for the receiving plate 45 to be embedded is only open on the side away from the pusher drive 51 and the higher side of the base 44. The receiving plate 45 is assembled with the base 44 and fixed with screws to form the receiving block 41. The upper sidewall of the base 44 and the upper plate surface after the receiving plate 45 is embedded in the base 44 are on the same plane. The pusher drive 51 and the receiving assembly 2 are installed and fixed on the base 44, while the protective block 53, support block 522, and... The workpiece is located on the receiving plate 45. The limiting plate 43 is formed by two independent parts abutting each other. One part of the limiting plate 43 is installed and fixed on the base 44, and the other end is installed and fixed on the receiving plate 45, so as to realize the overall transfer of the entire receiving plate 45 and the workpiece it holds. Since the small round part 61 of the workpiece faces the direction of the pusher mechanism 5, the workpiece is not easy to fall backward. The entire receiving plate 45 can be transferred as a whole after it is moved outward. In this embodiment, it is necessary to reduce the size of the receiving plate 45, that is, the size of the entire receiving table 4 and the length of the receiving channel 21, to adapt to the transfer scale and reduce the transfer difficulty.

[0045] Meanwhile, the feeder is equipped with sensors at the feeding end of the external section 12 and the transfer section 13 to detect the passing workpieces. By sensing the workpieces by the two sensors at the same time, it can determine whether the receiving channel 21 is full of workpieces, so as to control the operation of the pushing mechanism 5.

[0046] The implementation principle of a material feeding machine according to an embodiment of this application is as follows: the conveying channel 11 continuously sends workpieces one by one into the receiving channel 21. The workpieces form a row of one workpieces in the receiving channel 21. Then the support block 522 moves backward, and the workpieces fall from the receiving channel 21 into the receiving surface 42. At this time, the blocking component 3 blocks the workpieces in the conveying channel 11, restricting the workpieces from continuing to enter the receiving channel 21. Then, the support block 522 moves forward again and resets under the drive of the pushing drive component 51, pushing the falling row of workpieces forward. During this process, the blocking component 3 no longer blocks the conveying of workpieces, and rows of workpieces are continuously formed in the receiving channel 21. The workpieces are continuously pushed forward, and the support block 522 repeats the cycle, finally completing the multi-row and multi-column material feeding process.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An unloader characterized by: The system includes a conveying channel (11), a receiving channel (21), a receiving platform (4), and a pushing mechanism (5). The receiving platform (4) continuously feeds and discharges workpieces. The receiving channel (21) is located on one side of the receiving platform (4) and continuously receives input workpieces. The receiving channel (21) forms multiple rows at a time, with each row containing only one workpiece. The receiving platform (4) has a limiting plate (43) on the side of the receiving channel (21) away from the conveying channel (11). The conveying channel (11) continuously feeds workpieces one by one into the receiving channel (21), and the receiving platform (4) is equipped with a blocking component (3) that can operate and control the end of the conveying channel (11). The workpiece is conveyed and restricted. The pushing mechanism (5) is installed on the receiving platform (4) and continuously pushes the workpiece in the receiving channel (21) forward. The pushing mechanism (5) includes a pushing drive (51), a pushing block (521) and a protective block (53). The pushing block (521) pushes the workpiece in the receiving channel (21) forward under the drive of the pushing drive (51). The protective block (53) is slidably installed on the receiving platform (4). The protective block (53) is located on the front side of the conveying channel (11) and abuts against the frontmost row of workpieces. The sliding direction of the protective block (53) is consistent with the pushing direction of the pushing drive (51).

2. A material discharging machine according to claim 1, characterized in that The pushing mechanism (5) also includes a support block (522), which abuts against the workpiece. The support block (522) moves and causes the workpiece in the receiving channel (21) to move down and leave the conveying channel (11).

3. An apparatus as claimed in claim 2, wherein: The push block (521) is connected to the support block (522). The push block (521) drives the support block (522) to move backward and then forward to push the workpiece below the receiving channel (21).

4. A material discharging machine according to claim 1, characterized in that: The blocking assembly (3) includes a blocking block (31), a push spring (33), and an external pull drive (34). The push spring (33) causes the blocking block (31) to always have one end extending into the conveying channel (11). The external pull drive (34) causes the blocking block (31) to overcome the elastic force of the push spring (33) and its end to disengage from the conveying channel (11).

5. An apparatus as claimed in claim 3, wherein: The blocking assembly (3) includes a blocking block (31), a push spring (33), and an external pull drive (34). The push spring (33) causes the blocking block (31) to always have one end extending into the conveying channel (11). The external pull drive (34) includes an external pull lever (341). The middle part of the external pull lever (341) is rotatably mounted on the receiving platform (4). One end of the external pull lever (341) is associated with the blocking block (31), and the other end is associated with the push block (521).

6. An apparatus as claimed in claim 3, wherein: The receiving platform (4) is provided with a first conveying block (22) and a second conveying block (23). The first conveying block (22) and the second conveying block (23) form the conveying channel (11). The distance between the second conveying block (23) and the table surface of the receiving platform (4) is sufficient for the workpiece to move forward and pass through. The distance between the first conveying block (22) and the second conveying block (23) is greater than the axial length of the workpiece. When the support block (522) moves forward to the limit of its stroke, the distance between the outer wall of the support block (522) and the first conveying block (22) is greater than the distance between the second conveying block (23) and the first conveying block (22).

7. An apparatus as claimed in claim 1, wherein: The surface of the receiving platform (4) for placing the workpiece is designated as the receiving surface (42), which is an inclined surface, and the height of the receiving surface (42) gradually decreases from the side away from the limiting plate (43) towards the limiting plate (43).

8. An apparatus as claimed in claim 1, wherein: The protective block (53) is placed on the receiving platform (4) and moved forward under the push of the workpiece.

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