CN218490753U

CN218490753U - Novel material distributing mechanism

Info

Publication number: CN218490753U
Application number: CN202222621579.6U
Authority: CN
Inventors: 程清峰; 陈鸿德; 高圳雄; 林道明
Original assignee: Xiamen Yingfeng Automation Technology Co ltd
Current assignee: Xiamen Yingfeng Automation Technology Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-02-17
Anticipated expiration: 2032-09-30

Abstract

The utility model relates to the technical field of relay production equipment, in particular to a novel material distribution mechanism, which comprises a feeding device for conveying workpieces side by side, wherein the feeding direction of the feeding device is defined as the front-back direction; the output end of the feeding device is provided with a shifting device, the shifting device is provided with a plurality of tool seats, the tool seats are provided with openable workpiece restraining structures, each tool seat is connected with a shifting driving device, the shifting driving device can drive the tool seat to move back and forth on a horizontal plane, and each tool seat can closely move to the output end of the feeding device side by side during material receiving; the material feeding device is characterized in that the output end region of the material feeding device is also provided with a material pressing device and a material distribution detection device, the material pressing device is used for carrying out cutoff control on a workpiece at the tail end of the material feeding device, and the material distribution detection device is used for detecting the in-place condition of the workpiece on each tool seat when receiving the material. The utility model discloses help solving current structure and do not possess the work piece and adjust the problem of adjacent position relation function after dividing the material.

Description

Novel material distributing mechanism

Technical Field

The utility model relates to a relay production facility technical field especially relates to a novel feed mechanism for connection frame.

Background

The relay is used as a device of a circuit control system, plays an interactive relation between the control system and a controlled system, and generally plays roles of automatic adjustment, safety protection, circuit conversion and the like in a circuit. The terminal frame is one of numerous structures of binding post, in the production and processing process of relay, often can carry out the material loading with binding post and divide the material to transport, prepares for follow-up assembly.

For example, the chinese patent CN201920444733.2 discloses a full-automatic feeding and separating machine for a connection terminal, which comprises an automatic feeding component and an automatic separating component, wherein the automatic separating component is arranged beside the automatic feeding component. The wiring terminals in the plastic bag are poured into the vibration disc of the automatic feeding part, then the automatic feeding part is started, the wiring terminals are automatically conveyed out in sequence, then the automatic distributing part is started, and the foremost wiring terminals and the subsequent wiring terminals are separated. In the technical scheme, the wiring terminals capable of automatically feeding can be automatically distributed, the wiring terminals distributed at each time are still tightly arranged in groups, and the number of each group of wiring terminals is small for adapting to subsequent transfer actions.

In the actual production process of present relay, in order to improve production efficiency, can increase the quantity of assembly station at same feed mechanism rear end, lead to the transport structure to need divide the material at the feed end of wiring frame, be about to carry out the equivalent distribution according to batching by the wiring frame of material loading side by side, need adjust the interval between each wiring frame as a batch after carrying out the material loading for 4 wiring frames. Obviously, the distribution requirement of the current wiring frame cannot be met in the technical scheme of the patent.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel feed mechanism helps solving the problem that current structure does not possess the work piece and adjusts adjacent position relation function after dividing the material.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the novel material distribution mechanism comprises a feeding device for conveying workpieces side by side, and the feeding direction of the feeding device is defined as the front-back direction; the output end of the feeding device is provided with a shifting device, the shifting device is provided with a plurality of tool seats, the tool seats are provided with openable workpiece restraining structures, each tool seat is connected with a shifting driving device, the shifting driving device can drive the tool seat to move back and forth on a horizontal plane, and each tool seat can closely move to the output end of the feeding device side by side during material receiving; the material feeding device is characterized in that the output end region of the material feeding device is also provided with a material pressing device and a material distribution detection device, the material pressing device is used for carrying out cutoff control on workpieces at the tail end of the material feeding device, and the material distribution detection device is used for detecting the in-place condition of the workpieces on each tool seat when the materials are received.

On the basis of the technical scheme, the feeding device comprises a vibrator, and a straight vibrating material channel is arranged at the top of the vibrator.

On the basis of the technical scheme, the pressing device comprises a pressing rod located right above the discharging end of the feeding device, the pressing rod is connected with a lifting driving device, and the pressing rod can descend to abut against a workpiece located at the discharging end of the feeding device to form a cutoff control structure.

On the basis of the technical scheme, the shifting device comprises a base located on the rear side of the feeding device, guide rails which face the front and the rear of the base in at least two levels are arranged at the top of the base, sliders are connected on the guide rails, the top of the tooling seat is arranged at the top of the slider, the shifting driving device comprises a front driving piece and a rear driving piece which are fixedly arranged on the base, and a left driving piece and a right driving piece which are fixedly arranged on the base, the front driving piece and the rear driving piece are respectively connected with the sliders through transmission structures, the front driving piece and the rear driving piece are used for driving the sliders to move back and forth along the guide rails, the left driving piece and the right driving piece are used for driving the constraint structures of the tooling seat to move horizontally, and constraint control of workpieces on the tooling seat is realized.

On the basis of the technical scheme, the front driving part and the rear driving part adopt a single driving source and are in transmission connection with the sliding blocks through a plurality of rod body structures.

On the basis of above-mentioned technical scheme, be equipped with the frock groove that is used for holding the work piece on the frock seat, the frock spout of orientation about the frock inslot side is equipped with, is equipped with the restraint slider in the frock spout, and the restraint slider is controlled and is controlled the restraint that can realize the work piece to the frock inslot work piece about the control in the frock spout, and the output and the restraint slider transmission of controlling the driving piece are connected, control the driving piece and can drive about the restraint slider and control.

Compared with the prior art, the embodiment at least has the following advantages:

1. the utility model discloses a set up a plurality of frock seats at the loading attachment output, the frock seat passes through transmission structure and connects drive arrangement, and adjacent frock seat can carry out the adjustment of front and back position after loading the work piece, has solved current connection frame loading attachment and has not possessed the problem of adjusting adjacent position relation function after dividing the material.

2. The utility model discloses a set up press device at the loading attachment output, utilize reciprocating of pressing the material pole, realize the cutout control to the work piece in the transportation process side by side, reach the branch material effect of blowing in batches.

3. The utility model discloses a set up branch material detection device at the loading attachment output for the condition that targets in place of work piece detects on each frock seat, promotes the transport quality precision of work piece, avoids appearing lacking the material and leads to the appearance of follow-up technology because of lacking the idle running situation that the work piece produced, and this helps reducing the defective percentage.

Drawings

Fig. 1 is a schematic structural view of a novel material distribution mechanism in an embodiment;

FIG. 2 is a schematic view of a position relationship among a feeding device, a pressing device and a distributing detection device of the wiring frame in FIG. 1;

FIG. 3 is a schematic structural view of the pressing rod of the pressing device in FIG. 2 for restricting the state of the wire frame;

FIG. 4 is a schematic structural diagram of the shifting apparatus of FIG. 1;

FIG. 5 is a top view of the assembled relationship of the main plate and the slider of FIG. 4;

FIG. 6 is a schematic structural view of the tooling seat in FIG. 4;

fig. 7 is a schematic structural view of the wire frame.

The figure is marked with: 100. a feeding device; 110. a vibrator; 120. a direct vibration material channel; 130. an adjusting seat; 140. a feeding sensor; 200. a pressing device; 210. a material pressing cylinder; 220. a material pressing frame; 230. A material pressing rod; 300. a material distribution detection device; 310. a material distribution detection support; 320. a material distribution sensor; 400. a displacement device; 500. a wiring frame; 510. an upper hole; 520. a side hole; 1. a base; 11. a guide rail; 12. a vertical plate; 21. a first slider; 211. a guide through hole; 22. a second slider; 23. a third slider; 24. a fourth slider; 3. a first cylinder; 31. a telescopic rod; 32. a first pull rod; 33. a second pull rod; 41. a first guide bar; 42. a second guide bar; 43. a third guide bar; 44. a fourth guide bar; 45. A fifth guide bar; 5. an in-position sensor; 6. a second cylinder; 61. a transition side plate; 71. a first movable plate; 72. a second movable plate; 73. an extension rod; 8. a tool seat; 81. a tooling groove; 82. a tooling chute; 9. restraining the sliding block; 91. a movable clamping groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The specific structure of the wire frame is shown in fig. 7, and in the material distributing process, the upper hole and the side hole are used for the insertion and matching of the constraint structure.

Embodiment 1, referring to fig. 1, the embodiment discloses a novel material distribution mechanism, which specifically includes a feeding device 100, a pressing device 200, a material distribution detection device 300, and a displacement device 400. Wherein, loading attachment 100 is used for transporting wire frame 500 side by side. The pressing device 200 is used for periodically controlling the current interruption of the wiring frame 500 at the end of the feeding device 100. The material distribution detection device 300 is used for detecting the in-place condition of the workpieces conveyed to the shifting device 400 in batches.

The assembly relationship of the feeding device 100, the pressing device 200 and the divided material detecting device 300 is shown in fig. 2, wherein the feeding device 100 comprises a vibrator 110, a straight vibrating channel 120 is connected to the top of the vibrator 110, the straight vibrating channel 120 has a linear feeding track, and the wire connecting frames 500 can move in the straight vibrating channel 120 in parallel by the vibration of the vibrator 110 to form a linear feeding mechanism. In addition, the bottom of the vibrator 110 is provided with an adjusting seat 130 for adjusting the heights of the vibrator 110 and the straight vibration channel 120, so that the discharging position of the wire frame 500 can be adapted to the rear end device, and the bottom of the adjusting seat 130 is used for being connected and fixed with external equipment. In order to improve the utilization rate of the vibrator 110, a feeding sensor 140 is arranged at the front end region of the straight vibrating material channel 120, the feeding sensor 140 is a light sensor, and is used for detecting whether the wiring frame 500 is contained in the straight vibrating material channel 120 at the position, when the vibrator 110 works, if the wiring frame 500 is detected to be absent, the vibrator 110 is controlled to work through the connection of a circuit control system, materials are supplemented, and if the wiring frame 500 is detected to be present, the vibrator 110 stops for standby. In other embodiments, two or more load sensors 140 may be provided to precisely control the amount of reserve of the wire frame 500 on the straight vibrating tunnel 120.

The pressing device 200 and the material distribution detection device 300 are respectively arranged on two sides of the output end of the feeding device 100.

With reference to fig. 3, the pressing device 200 includes a pressing cylinder 210, the pressing cylinder 210 is fixedly connected to an external device through a support, an expansion rod 31 of the pressing cylinder 210 is vertically upward, a pressing frame 220 is connected to a top end of the expansion rod 31, one end of the pressing frame 220 extends to a position right above a discharge end of the straight vibration material channel 120, and the pressing frame 220 is fixedly connected to a vertical pressing rod 230 at a bottom of the extension end, when the pressing device works, the pressing cylinder 210 can drive the pressing frame 220 and the pressing rod 230 to ascend and descend, and the pressing rod 230 can be inserted into an upper hole 510 of a wiring frame 500 at a tail end of a discharge end of the straight vibration material channel 120 from top to bottom after descending, so as to form a limiting and constraining structure, prevent the wiring frame 500 from continuously outputting, and achieve a current breaking effect; after the material pressing rod 230 rises, the wiring frame 500 on the straight material vibrating channel 120 resumes feeding, and continues moving towards the rear end, so that the above actions are circulated, periodic current interruption is realized, and the shunting effect of batch output of the wiring frame 500 is achieved. In this embodiment, the start-stop time of the swaging air cylinder 210 is controlled, so that the 4 wire frames 500 are conveyed at a time.

The distribution detection device 300 comprises a distribution detection support 310 for being connected and fixed with external equipment, 4 distribution sensors 320 arranged side by side in front and at the back are arranged at the top of the distribution detection support 310, the distribution sensors 320 are positioned at the rear side of the output end of the feeding device 100, 4 wiring frames 500 in each batch can enter the tool seat 8 after being output, and the 4 distribution sensors 320 are arranged right above the tool position in a one-to-one correspondence manner and are used for detecting whether the wiring frames 500 are in place or not. The distributing sensor 320 in this embodiment is a light sensor.

Further, as shown in fig. 4-6, the shifting device 400 includes a base 1 for connecting and fixing with an external device, the top of the base 1 is a horizontal plate structure, the horizontal plate structure is provided with 2 guide rails 11 which are arranged in a front-back direction and in a left-right interval distribution, the left guide rail 11 is movably connected with a first slider 21 and a second slider 22, and the right guide rail 11 is movably connected with a third slider 23 and a fourth slider 24.

The left side of the base 1 is fixedly provided with a first cylinder 3, the first cylinder 3 serves as a front-back driving device, a telescopic rod 31 of the first cylinder 3 faces backwards, the rear end of the telescopic rod 31 is fixedly connected with a first pull rod 32, and the inner side wall of the first pull rod 32 is fixedly connected with the outer side wall of the first sliding block 21 through a bolt, so that the first cylinder 3 can drive the first sliding block 21 to move back and forth along the guide rail 11.

The inner end of the first slider 21 is connected with a first guide rod 41 facing horizontally, the front end of the first guide rod 41 is connected and fixed with the second slider 22, the rear end of the first guide rod 41 is provided with a flange, the first slider 21 is provided with a guide through hole 211 (shown in fig. 6) for the first guide rod 41 to penetrate through, the first guide rod 41 penetrates through the guide through hole 211, the flange of the first guide rod is located at the rear side of the guide through hole 211, and the flange cannot penetrate through the guide through hole 211, that is, the front end of the first guide rod 41 is connected and fixed with the second slider 22, the rear end of the second guide rod 42 is a free end limited in forward movement, that is, when the first slider 21 drives the guide through hole 211 to move backwards for a certain distance, the flange of the first guide rod 41 can abut against the rear side of the guide through hole 211, when the first slider 21 continues to move backwards, the first guide rod 41 and the second slider 22 can be pulled to move backwards synchronously, and when the first slider 21 drives the guide through hole 211 to move forwards, the first guide rod 41 can penetrate through hole 211, and the first guide rod 41 can not affect the forward movement of the first slider 21. The front end of the outer side of the second slider 22 is fixedly connected with a second guide rod 42 which faces horizontally forward and backward, the structure of the second guide rod 42 is consistent with that of the first guide rod 41, the front end and the rear end of the base 1 are provided with vertical plates 12, the vertical plate 12 positioned at the front end is provided with through holes for the second guide rod 42 to penetrate through (the structure of the through holes is consistent with that of the guide through holes 211 on the first slider 21 and the action of the through holes), the flange of the second guide rod 42 is positioned at the front side of the through holes on the vertical plates 12, and the flange cannot penetrate through the through holes on the vertical plates 12, i.e., the rear end of the second guide rod 42 is fixedly connected with the second slider 22, the front end of the second guide rod 42 is a free end limited in backward movement, that is, when the second guide rod 42 moves backward to a certain distance along with the second slider 22, the flange on the second guide rod 42 can abut against the front side of the through holes on the vertical plates 12 to form a limiting structure for the second slider 22, and when the second guide rod 42 moves forward along with the second slider 22, the through holes can not affect the forward movement of the second slider 22.

Furthermore, a second pull rod 33 facing left and right is fixedly connected to the rear side of the first slider 21, the right side of the second pull rod 33 extends to the rear side of the third slider 23, a through hole is formed in the second pull rod 33, a third guide rod 43 penetrates through the through hole, the structure of the third guide rod 43 is consistent with that of the first guide rod 41, a flange is arranged at the rear end of the second pull rod 33, the front end of the third guide rod 43 is fixedly connected with the third slider 23, that is, the rear end of the third guide rod 43 is a free end with limited forward movement, that is, when the second pull rod 33 moves backward along with the first slider 21 for a certain distance, the flange of the third guide rod 43 abuts against the rear side of the through hole in the second pull rod 33, when the second pull rod 33 continues to move backward, the third guide rod 43 and the third slider 23 can be pulled to move backward synchronously, and when the second pull rod 33 moves forward, the third guide rod 43 can penetrate through the through hole in the second pull rod 33, and the third guide rod 43 does not affect the forward movement of the second pull rod 33.

Further, a fourth guide rod 44 is disposed between the third slider 23 and the fourth slider 24, a through hole for the fourth guide rod 44 to penetrate through is disposed on the third slider 23, a flange is disposed on the rear side of the through hole on the third slider 23 of the fourth guide rod 44, the flange cannot penetrate through the through hole on the third slider 23, the front end of the fourth guide rod 44 is fixedly connected to the fourth slider 24, that is, the rear end of the fourth guide rod 44 is a free end with limited forward movement, that is, when the third slider 23 moves backward for a certain distance, the flange on the fourth guide rod 44 abuts against the rear side of the through hole on the third slider 23, the third slider 23 continues to move backward, the fourth guide rod 44 and the fourth slider 24 are driven to move backward, and the fourth guide rod 44 does not affect the forward movement of the third slider 23. The front end of the fourth slider 24 and the vertical plate 12 are further provided with a fifth guide rod 45, the fifth guide rod 45 and the second guide rod 42 have the same structure, and the effect of the fifth guide rod 45 on the fourth slider 24 is the same as the effect of the second guide rod 42 on the second slider 22.

The first slide block 21, the second slide block 22, the third slide block 23 and the fourth slide block 24 are respectively provided with 1 tooling seat 8,4 tooling seats 8 which are positioned on the central line in the same front-back direction and aligned with the output direction of the feeding device 100. The tool holder 8 is used for accommodating the clamping wiring frame 500 and adjusting the distance between the 4 wiring frames 500 in the front-back direction in cooperation with the sliding of the sliding blocks. It should be noted that the tooling seat 8 on the fourth slider 24 is located at the foremost side, the tooling seat 8 on the second slider 22 is located at the second position at the front side, the tooling seat 8 on the third slider 23 is located at the third position at the front side, and the tooling seat 8 on the first slider 21 is located at the rearmost side. 4 frock seats 8 can closely combine the range.

Therefore, when the first cylinder 3 drives the first slider 21 to move forward, the flange on the first guide rod 41 is not abutted to the guide through hole 211 on the first slider 21, the front side of the first slider 21 can move forward continuously, and meanwhile, the working seat on the first slider 21 is abutted to the rear side of the tooling seat 8 on the third slider 23, so that the first slider 21 can drive the third slider 23 to move forward, and after the movement, the tooling seat 8 on the third slider 23 is abutted to the rear side of the tooling seat 8 on the second slider 22, so that the first slider 21 can drive the third slider 23 and the second slider 22 to move forward simultaneously, and after the movement, the tooling seat 8 on the second slider 22 is abutted to the rear side of the tooling seat 8 on the fourth slider 24, so that the first slider 21 can drive the forward-moving third slider 23, the second slider 22 and the fourth slider 24 to move forward to the output end of the feeding device 100 together, and 4 tooling seats 8 are tightly attached side by side, so that the wire connecting frame 500 can enter the tooling seat 8. After the wiring frame 500 is loaded, the first cylinder 3 drives the first slider 21 to move backward, after moving backward for a certain distance, the second pull rod 33 and the third guide rod 43 drive the third slider 23 to move backward together, after moving backward for a certain distance, the second slider 22 is synchronously driven to move backward, after moving for a certain distance, the fourth slider 24 is synchronously driven to move backward, the second guide rod 42 restricts the backward movement distance of the second slider 22, the fifth guide rod 45 restricts the backward movement distance of the fourth slider 24, the first guide rod 41 cooperates with the second slider 22 and the second guide rod 42 to restrict the backward movement distance of the first slider 21, the third guide rod 43 cooperates with the fourth slider 24, the fourth guide rod 44 and the fifth guide rod 45 to restrict the backward movement distance of the third slider 23, and finally 4 sliders are moved to target positions, so that a shifting process of 4 wiring frames 500 is formed.

Further, as shown in fig. 6, a tooling groove 81 for accommodating the wire connection frame 500 is formed in the tooling seat 8, an opening structure penetrates through the tooling groove 81 in the second slider 22, the third slider 23 and the fourth slider 24 from front to back, a baffle is arranged on the rear side of the tooling groove 81 in the first slider 21, a tooling sliding groove 82 is formed in the tooling seat 8 located on the outer side of the tooling groove 81, the inner side end of the tooling sliding groove 82 is communicated with the outer side end of the tooling groove 81, a restraining slider 9 capable of sliding left and right is arranged in the tooling sliding groove 82, and after the restraining slider 9 moves inwards, the inner side end of the restraining slider passes through the tooling groove 81 and is inserted into the side hole 520 of the wire connection frame 500 in the transverse direction to form a restraining structure for the wire connection frame 500, so that the wire connection frame 500 can keep fixed in position during the moving process.

The two outer sides of the left side and the right side of the base 1 are provided with 2 second cylinders 6, the telescopic rods 31 of the second cylinders 6 face outwards horizontally, the outer side ends of the telescopic rods 31 are fixedly connected with transition side plates 61, the transition side plates 61 extend upwards to the upper side of the sliding block, the inner side ends of the transition side plates 61 are provided with a first movable plate 71 and a second movable plate 72 which are distributed at intervals up and down, the first movable plate 71 and the second movable plate 72 are of horizontal plate structures, extension rods 73 extend from the inner side ends of the first movable plate 71 and the second movable plate 72, the extension rods 73 are of horizontal front-back rod structures, movable clamping grooves 91 are formed in the tops of the outer side ends of the constraint sliding blocks 9, the extension rods 73 are clamped in the movable clamping grooves 91, the extension rods 73 are in clearance fit with the movable clamping grooves 91, and in the shifting process, the front-back movement of the constraint sliding blocks 9 cannot be affected by the extension rods 73.

In order to improve the displacement accuracy, the in-place sensor 5 is arranged on the vertical plate 12 and used for detecting whether the front and rear strokes of the sliding block are in place, and the in-place sensor 5 in the embodiment adopts a pressure sensor.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The novel material distribution mechanism is characterized by comprising a feeding device (100) for conveying workpieces side by side, wherein the feeding direction of the feeding device (100) is defined as the front-back direction; the output end of the feeding device (100) is provided with a shifting device (400), the shifting device (400) is provided with a plurality of tool seats (8), the tool seats (8) are provided with workpiece restraining structures capable of being opened and closed, each tool seat (8) is connected with a shifting driving device, the shifting driving device can drive the tool seats (8) to move back and forth on a horizontal plane, and each tool seat (8) can closely move to the output end of the feeding device (100) side by side during material receiving; the area of the output end of the feeding device (100) is further provided with a pressing device (200) and a material distribution detection device (300), the pressing device (200) is used for controlling the cut-off of a workpiece at the tail end of the feeding device (100), and the material distribution detection device (300) is used for detecting the in-place condition of the workpiece on each tool seat (8) when the material is received.

2. The novel material distributing mechanism of claim 1, wherein the feeding device (100) comprises a vibrator (110), and a straight vibrating material channel (120) is arranged at the top of the vibrator (110).

3. The novel material distribution mechanism according to claim 1 or 2, wherein the material pressing device (200) comprises a material pressing rod (230) located right above the material outlet end of the material feeding device (100), the material pressing rod (230) is connected with a lifting driving device, and the material pressing rod (230) can descend and then press against a workpiece located at the material outlet end of the material feeding device (100) to form a cut-off control structure.

4. The novel material distributing mechanism according to claim 1, wherein the shifting device (400) comprises a base (1) located at the rear side of the feeding device (100), at least two guide rails (11) horizontally oriented front and back are arranged at the top of the base (1), a sliding block is connected to each guide rail (11), the tool holder (8) is arranged at the top of each sliding block, the shifting driving device comprises a front driving part and a rear driving part which are fixedly arranged on the base (1), the front driving part and the rear driving part are respectively connected with the sliding blocks through transmission structures, the front driving part and the rear driving part are used for driving the sliding blocks to move front and back along the guide rails (11), and the left driving part and the right driving part are used for driving the constraint structures of the tool holder (8) to move horizontally left and right, so that constraint control is performed on workpieces on the tool holder (8).

5. The novel material distribution mechanism as claimed in claim 4, wherein the front and rear driving members are driven by a single driving source and are connected with the sliding blocks through a plurality of rod structures.

6. The novel material distributing mechanism according to claim 4, wherein a tool groove (81) for accommodating workpieces is formed in the tool seat (8), a tool sliding groove (82) facing left and right is formed in the outer side of the tool groove (81), a constraint sliding block (9) is arranged in the tool sliding groove (82), constraint control over the workpieces in the tool groove (81) can be achieved by moving the constraint sliding block (9) left and right in the tool sliding groove (82), the output ends of the left and right driving pieces are in transmission connection with the constraint sliding block (9), and the left and right driving pieces can drive the constraint sliding block (9) to move left and right.