CN112975801A

CN112975801A - Pressing device and pin pressing device for workpiece with notch

Info

Publication number: CN112975801A
Application number: CN202110483136.2A
Authority: CN
Inventors: 张德文; 王欣; 吴广川; 汪琴琴; 叶维; 范单华; 陈周
Original assignee: Guangdong Hongtu Wuhan Die Casting Co ltd; Guangdong Hongtu Technology Holdings Co Ltd
Current assignee: Guangdong Hongtu Wuhan Die Casting Co ltd; Guangdong Hongtu Technology Holdings Co Ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-06-18
Anticipated expiration: 2041-04-30
Also published as: CN112975801B

Abstract

The invention discloses a pressing device and a pin pressing device for a workpiece with a notch, which belong to the technical field of post-processing of die-casting products and are used for fixing the workpiece with a notch structure. According to the pressing device for the workpiece with the notch and the pin pressing device for assembling the side wall of the tool, which are disclosed by the invention, through the matching arrangement of the pressing mechanisms and the abutting mechanisms, the abutting force is exerted on the side wall of the notch of the workpiece, the abutting mechanisms are ensured to be always abutted against the side wall of the workpiece, the phenomenon that the workpiece is integrally deformed due to the generation of a gap between the workpiece and the abutting mechanisms in the processing process of the workpiece is avoided, the whole device is stable in clamping the workpiece, and the rejection rate of workpiece processing is greatly reduced.

Description

Pressing device and pin pressing device for workpiece with notch

Technical Field

The invention belongs to the technical field of post-processing of die-casting products, and particularly relates to a pressing device and a pin pressing device for a workpiece with a notch.

Background

At present, in the automobile industry, in the processing process of an automobile part, one or more floating support mechanisms are usually arranged at positions which are easy to deform and have large stress, and the stress on the part is shared to each support mechanism so as to avoid the deformation of the part.

However, when some bent parts or parts with notches are machined on the side walls of the bent parts or the parts with the notches, the lateral extrusion force can cause the parts to be bent and contracted towards the notches, so that the whole product is deformed, and the product is scrapped.

When to the piece of buckling or the part that has the notch, current processing mode often is through setting up some support pieces on the mount pad, fills notch and bending part through support piece, then carries out processing to the lateral wall of part again. Although the deformation of the part can be slowed down to a certain extent in this way, when the existing part structure is assembled and machined, because the workpiece itself usually has product tolerance, when the supporting piece is abutted to the notch of the workpiece, the side wall of the notch usually cannot be completely attached to the supporting piece, and when the side wall of the workpiece is stamped or assembled, the workpiece is easily bent towards the notch, so that the workpiece is deformed.

Disclosure of Invention

In view of one or more of the above-mentioned deficiencies or needs for improvement in the prior art, the present invention provides a pressing device and a pin pressing device for a workpiece with a notch, which solve the problem that the existing notched part is easy to deform when machining the side wall.

In order to achieve the purpose, the invention provides a pressing device for a workpiece with a notch, which comprises a mounting seat, wherein a pressing mechanism for pressing and fixing a pressing pin piece is arranged on the mounting seat;

the mounting seat is also provided with an abutting mechanism; the abutting mechanism is positioned on one side of the workpiece, which is far away from the pressing end of the pressing mechanism, and comprises a swinging rod and a driving mechanism for driving the swinging rod to swing; the end part of the swing rod extends into the notch of the workpiece, and the swing rod rotates to abut against the side wall of the notch of the workpiece and exerts abutting force towards the wall surface of the side to be processed of the workpiece under the driving of the driving mechanism.

As a further improvement of the invention, when the swinging rod is driven by the driving mechanism to abut against the side wall of the workpiece notch, the end part of the swinging rod abuts against the bottom of the workpiece notch.

As a further improvement of the invention, the swing rod is arranged on the mounting seat in a penetrating way, a gap for the swing rod to swing is reserved on the mounting seat, and the driving mechanism is arranged on one side of the mounting seat, which is away from the workpiece.

As a further improvement of the invention, the driving mechanism comprises a stretching cylinder and a jacking cylinder, the stretching cylinder and the jacking cylinder are respectively arranged at two sides of the oscillating rod, and the oscillating rod oscillates on the same vertical plane through the telescopic motion of the stretching cylinder and the jacking cylinder.

As a further improvement of the invention, the mounting seat is also provided with a supporting block which is abutted against the circumferential wall surface of the notch of the workpiece.

As a further improvement of the invention, the supporting block is provided with a notch for the swing rod to pass through, and a rotating shaft horizontally extends out of the notch towards the swing rod, and the rotating shaft passes through the rotating fulcrum and is used for rotating the swing rod.

As a further improvement of the invention, the pressing mechanism comprises a first pressing mechanism and a second pressing mechanism, the first pressing mechanism is respectively arranged at the circumferential side wall of the workpiece and is used for fixing the circumferential side wall of the workpiece, and the pressing end of the second pressing mechanism is opposite to the abutting mechanism.

As a further improvement of the present invention, the mounting base is further provided with a plurality of positioning pins for positioning the workpiece.

The invention also provides a pin pressing device which comprises a pressing device for workpieces with notches and an assembling mechanism, wherein the assembling mechanism is correspondingly pressed and fixed on the workpieces on the mounting seat and is used for realizing pin pressing of the side walls of the workpieces.

As a further improvement of the invention, the assembling mechanism comprises a press-in air cylinder, and a press-in head is arranged at the end part of a piston rod of the press-in air cylinder, and the press-in head is over against a press pin hole of the workpiece.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

(1) according to the pressing device for the workpiece with the notch, the swinging rod is arranged and penetrates through the mounting seat, one end of the swinging rod extends out of the mounting seat, the driving mechanism is arranged on one side, away from the workpiece, of the mounting seat, so that the abutting mechanisms are prevented from being completely accumulated on the mounting seat, and the occupied area of the swinging mechanism on the mounting seat is reduced; meanwhile, the swing stroke of the swing rod can be increased, and the output power of the driving mechanism is reduced by adding the power arm of the lever, so that the swing rod can provide enough abutting force for the side wall of the workpiece, and stable processing of the workpiece is guaranteed.

(2) According to the pressing device for the workpiece with the notch, the supporting block is arranged at the bottom of the workpiece, the second pressing mechanism is arranged above the workpiece, and the notch of the workpiece is independently fixed in the process of pressing the workpiece by using the supporting block and the second pressing mechanism, so that the problem that the workpiece is bent towards the notch due to stress concentration at the notch in the process of pressing the pin is avoided, and the yield of the workpiece is improved.

(3) According to the pressing device for the workpiece with the notch, disclosed by the invention, when the workpiece is processed, under the condition that the notch of the workpiece is fixed through the supporting block and the second pressing mechanism, the swinging rod swings to abut against the bottom of the notch of the workpiece and applies an abutting force to the side wall of the notch of the workpiece, so that the swinging rod always abuts against the side wall of the workpiece in the process of assembling the workpiece by the assembling mechanism, and the probability that the workpiece is bent towards the notch in the processing process is greatly reduced.

(4) According to the pressing device for the workpiece with the notch, the abutting mechanism is arranged in a swinging abutting mode, so that the abutting mechanism can provide abutting force for the side wall of the workpiece in the processing position direction when abutting against the bottom of the notch of the workpiece, the abutting mechanism can always abut against the side wall of the workpiece in the processing direction, the stability of the periphery of the workpiece and the wall surface of the notch is ensured through the first pressing mechanism and the second pressing mechanism, and the workpiece cannot shrink towards the inner wall of the notch when the assembly mechanism processes the workpiece.

Drawings

FIG. 1 is a schematic view showing the overall structure of a pressing apparatus for a workpiece having a notch according to an embodiment of the present invention;

FIG. 2 is a schematic view of a mounting base structure according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a pressing device for a workpiece with a notch and a pin pressing device for assembling the side wall of a tool in an embodiment of the invention;

FIG. 4 is an enlarged schematic view at A in FIG. 3;

FIG. 5 is a schematic view of the structure of the abutment mechanism in the embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a work piece product in accordance with an embodiment of the present invention.

In all the figures, the same reference numerals denote the same features, in particular:

1. a mounting seat; 2. a first hold-down mechanism; 3. an assembly mechanism; 4. a second hold-down mechanism; 5. an abutting mechanism; 6. a support block; 7. a rotating shaft; 8. a supporting seat; 9. positioning pins;

301. pressing into a cylinder; 302. a press-in head;

501. a swing lever; 502. stretching the cylinder; 503. and tightly pushing the cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example (b):

referring to fig. 1-6, a pressing device for a workpiece with a notch according to a preferred embodiment of the present invention is used for fixing a workpiece with a notch structure, and includes an installation base 1, a pressing mechanism for pressing and fixing an end surface of the workpiece is disposed on the installation base 1, an abutting mechanism 5 is further disposed on the installation base 1, the abutting mechanism 5 is located on a side of the workpiece away from the pressing mechanism, an end portion of the abutting mechanism 5 extends into the notch of the workpiece, and when the workpiece is machined, the abutting mechanism 5 rotates to abut against a sidewall of the notch of the workpiece and applies an abutting force to the sidewall of the side of the workpiece to be machined, as shown in fig. 1 and 2.

According to the invention, the abutting mechanism 5 is arranged at the notch of the workpiece, the inner wall of the notch is abutted by the abutting mechanism 5, in the process of processing the workpiece, a force in the horizontal direction is applied to the workpiece by the abutting mechanism 5, and the abutting mechanism 5 can be always attached to the side wall of the workpiece, so that the workpiece is prevented from bending and deforming towards the abutting mechanism 5 in the processing process.

Further, as shown in fig. 3 and 4, as a preferred embodiment of the present invention, the abutting mechanism 5 includes a swing lever 501, one end of the swing lever 501 extends into the inner wall of the notch of the workpiece, a rotation fulcrum is provided on the swing lever 501, and one end of the swing lever 501 away from the workpiece is connected to a driving mechanism. Through lever structure, when utilizing actuating mechanism drive swinging arms 501 to swing, swinging arms 501 can rotate along rotating the fulcrum, and then reach the effect of butt work piece notch inner wall. Preferably, here the swing rod 501 when swinging to hug closely with the lateral wall of the workpiece notch, the tip of the swing rod 501 just hugs closely the bottom of the notch, and the tip of the swing rod 501 sets up to possess the same radian with the workpiece inner wall for there is not the clearance between swing rod 501 and the notch, avoids the work piece in the course of working, and the work piece extrudees towards the swing rod 501, causes the work piece to warp. Preferably, when aiming at workpieces with different depth notches, the oscillating rod 501 abutting end can be matched with the workpiece notch by selecting the oscillating rod 501 with different lengths or pin abutting joints at the tops of the abutting ends of the oscillating rod 501.

Further, as shown in fig. 5, as a preferred embodiment of the present invention, the swing lever 501 is inserted into the mounting base 1, and the driving mechanism is located on a side of the mounting base 1 facing away from the workpiece. Through setting up actuating mechanism in one side that mount pad 1 deviates from the work piece, can avoid actuating mechanism bulky, lead to spare part on mount pad 1 to cross to pile up too much, influence the closing device who contains the notch work piece and to the use of the pressure round pin device of frock lateral wall assembly. Meanwhile, the distance between the driving mechanism and the rotating fulcrum can be increased, and the driving mechanism drives the rotating rod to rotate by a small amplitude in a manner of increasing the power arm of the lever, so that the swinging rod 501 can give a large extrusion force to the inner wall of the notch of the workpiece, and the swinging rod 501 can be attached to the side wall of the notch of the workpiece all the time.

Further, as a preferred embodiment of the present invention, the driving mechanism includes a stretching cylinder 502 and a pushing cylinder 503, the stretching cylinder 502 and the pushing cylinder 503 are respectively disposed at two sides of the oscillating rod 501, and the stretching cylinder 502 and the pushing cylinder 503 have the same vertical plane in the stretching and retracting direction. Specifically, one end of the stretching cylinder 502 is hinged to the bottom surface of the mounting seat 1, and the other end of the stretching cylinder 502 is rotatably connected to the end of the swing rod 501; the base of the jacking cylinder 503 is fixed on the bottom surface of the mounting seat 1, and the telescopic end is also rotatably connected with the end part of the swinging rod 501. The connection between the stretching cylinder 502 and the jacking cylinder 503 and the swing rod 501 is preferably hinged by a hinge structure, so as to facilitate the rotation of the swing rod 501.

When the swing lever 501 is stretched, in order to ensure that the swing lever 501 can swing normally on the inner wall of the notch of the workpiece, a certain clearance needs to be left between the swing lever 501 and the notch of the workpiece, so that a clearance for the swing lever 501 to swing is left on the mounting base 1. However, this also causes the swing lever 501 to be displaced to some extent during the swing by the driving mechanism, so that the workpiece between the swing lever 501 and the mounting mechanism 3 does not correspond to each other, and the workpiece is twisted or damaged. Therefore, the two sides of the oscillating rod 501 are respectively provided with the stretching cylinder 502 and the jacking cylinder 503, the stretching cylinder 502 is used for controlling the oscillating amplitude of the oscillating rod 501, and the jacking cylinder 503 is used for locking and fixing the oscillating rod 501 when the oscillating rod 501 abuts against the inner wall of the notch of the workpiece, so that the oscillating rod 501 is prevented from shaking. And the tensile force and the jacking force of the two are positioned on the same vertical plane, so that the swinging rod 501 is prevented from deviating in the swinging process, and the abutting force applied to the workpiece by the swinging rod 501 deviates, so that the swinging rod 501 cannot always abut against the side wall in the machining direction.

Further, as a preferred embodiment of the present invention, a supporting block 6 is further provided on the mount base 1, and the supporting block 6 abuts on a circumferential wall surface at the notch of the workpiece. In the process of processing the workpiece, the notch is weak relative to other parts of the workpiece, and the oscillating rod 501 cannot completely fill the notch, so that the workpiece is easily bent towards the notch in the processing process. In order to avoid the workpiece from bending in the machining process, the supporting block 6 is arranged on the circumferential wall surface of the notch of the workpiece, and the workpiece is supported through the supporting block 6 so as to avoid the workpiece from bending towards the notch in the machining process.

Preferably, since the swing rod 501 is disposed at the notch and the supporting block 6 is used for fixing the circumferential side wall of the notch of the workpiece, in order to facilitate the disposition of the swing rod 501 and the supporting block 6, the swing rod 501 is sleeved on the supporting block 6, the supporting block 6 is integrally "Contraband" shaped, the swing rod 501 is located in the concave space, the swing rod 501 can swing in the concave space, and the two sides of the supporting block 6 can limit the swing direction of the swing rod 501, so as to prevent the swing rod 501 from swinging towards the two sides. Further, the support block 6 extends perpendicularly to the swing lever 501 through the rotation shaft 7, and the rotation shaft 7 passes through the rotation fulcrum of the swing lever 501 to support the rotation of the swing lever 501.

Preferably, as shown in fig. 6, when the notch of the workpiece is large, the swinging rod 501 abuts against the notch and the supporting block 6 is arranged in the circumferential direction of the notch to abut against the notch, which still causes the problem that the workpiece is deformed during the machining process. Consequently to the great work piece of notch, the accessible is with supporting shoe 6 to go into work piece notch inner wall to the butt position deviates from work piece and treats notch wall one side of processing, and is close to the wall of work piece processing position one side and passes through the butt of swinging arms 501, can increase the stable effect of third work piece and supporting shoe 6 to the work piece like this by a wide margin, avoids the work piece to take place to warp in notch department.

Further, as a preferred embodiment of the present invention, the pressing mechanism includes a first pressing mechanism 2 and a second pressing mechanism 4, wherein the first pressing mechanism 2 is disposed at a circumferential side wall of the workpiece, and extends out of the pressing head toward an end surface of the workpiece, for fixing the periphery of the workpiece; the vertical setting of second hold-down mechanism 4 to the pressure head of second hold-down mechanism 4 is just to butt mechanism 5 for compress tightly the bottom surface of work piece notch department, prevent to press the round pin in-process, because notch department wall is too thin, lead to the work piece to buckle towards notch department.

Further, as a preferred embodiment of the present invention, the mounting base 1 is further provided with a supporting base 8, the supporting base 8 is fixedly arranged on one side of the workpiece processing side wall, and the second pressing mechanism 4 is arranged on the supporting base 8. Since the second pressing mechanism 4 is used for pressing the upper end of the workpiece, in order to ensure the stress of the second pressing mechanism 4, a supporting seat 8 is additionally arranged on the mounting seat 1, the second pressing mechanism 4 is arranged on the supporting seat 8, and the supporting seat 8 is used for ensuring the pressing force of the second pressing mechanism 4. The pressing plane of the second pressing mechanism 4 is opposite to the bottom surface of the notch of the workpiece, and the workpiece is prevented from deforming at the notch in the machining process by the matching and tightening of the second pressing mechanism 4 and the supporting block 6.

Further, the invention also comprises a press pin device which comprises an assembling mechanism 3, wherein the assembling mechanism 3 comprises a press cylinder 301, a press head 302 is arranged at the end part of the press cylinder 301, and the press head 302 can be used for matching the end part of the assembling part of the workpiece. In the process of processing a workpiece, there are cases where not only the press-fitting of the workpiece is performed, but also the side wall of the workpiece is assembled, and in the case of assembling a bolt member or the like, the press-fitting cylinder 301 needs to provide not only a pressing force but also a screwing force to screw the bolt member into the workpiece, so that the assembling mechanism 3 preferably employs a servo cylinder, and the fitting and screwing of the assembly is controlled by the press-fitting head 302, and the force applied to the workpiece is also strictly controlled by the servo cylinder, and the pin member or the like can be assembled to the workpiece.

Preferably, in order to control the assembly machining precision of the assembly mechanism 3, a limit hole is formed in the support base 8, and the press-in head 302 of the assembly mechanism 3 passes through the limit hole and faces the machined part of the workpiece. Through the further restriction of spacing hole, stabilize the processing state of impressing head 302, avoid impressing head 302 and take place the skew in the course of the work.

Further, in order to guarantee the pressing effect of the first pressing mechanism 2 and the second pressing mechanism 4 in the pressing device for the workpiece with the notch, the workpiece is prevented from shaking in the machining process, a plurality of positioning pins 9 for positioning the workpiece are further arranged on the mounting seat 1, and a plurality of pin holes are correspondingly formed in the workpiece and used for enabling the workpiece to be arranged on the positioning pins 9 in a penetrating mode. Meanwhile, as the supporting block 6 and the swing rod 501 are abutted against the notches of the workpiece, in order to avoid deformation of other parts of the workpiece under the pressure of the first pressing mechanism 2, a plurality of receiving heads are further arranged below the workpiece and are over against the first pressing mechanism 2, so that the workpiece is prevented from deforming under the pressure of the first pressing mechanism 2, and the fixing effect of the whole pressing device of the workpiece with the notches and the pressing pin device assembled on the side wall of the tool on the workpiece can be further enhanced.

The working process of the pin pressing device for assembling the side wall of the tool comprises the following steps: when a workpiece needs to be assembled by using a pin pressing device for assembling the side wall of the tool, a pin hole of the workpiece is over against a positioning pin 9 on an installation seat 1, the workpiece is placed on the plane of the installation seat 1, and a first pressing mechanism 2 is started to fix the periphery of the workpiece; then, a second pressing mechanism 4 is started, and the wall surface of the notch of the workpiece is fixed by the second pressing mechanism 4 and a supporting block 6; starting the stretching cylinder 502, driving the swing rod 501 to swing by the stretching cylinder 502, enabling the swing rod 501 to abut against the bottom of the notch of the workpiece after rotating, and enabling the swing rod 501 to provide an abutting force towards the side wall of the notch of the workpiece; starting the jacking cylinder 503, wherein the jacking cylinder 503 continuously exerts a butting force on the oscillating rod 501, so that the oscillating rod 501 is guaranteed to be always butted on the side wall of the notch of the workpiece; the pressing-in air cylinder 301 is started, the pressing-in head 302 of the pressing-in air cylinder 301 drives the assembly part to be pressed into the workpiece to complete assembly work, then the pressing-in air cylinder 301 drives the pressing-in head 302 to return to an initial state, the jacking air cylinder 503 is loosened, the stretching air cylinder 502 contracts reversely, the first pressing mechanism 2 and the second pressing mechanism 4 return to an original state, and the workpiece can be normally taken out of the mounting seat 1.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A hold-down device for a workpiece with a notch comprises a mounting seat, a hold-down mechanism for holding down and fixing a pin pressing piece is arranged on the mounting seat, and is characterized in that,

the mounting seat is also provided with an abutting mechanism;

the abutting mechanism is positioned on one side of the workpiece, which is far away from the pressing end of the pressing mechanism, and comprises a swinging rod and a driving mechanism for driving the swinging rod to swing; the end part of the swing rod extends into a notch of the workpiece, and under the driving of the driving mechanism, the swing rod can be rotated to abut against the side wall of the notch of the workpiece and exert abutting force towards the wall surface of the side to be processed of the workpiece.

2. The apparatus according to claim 1, wherein the swing lever is driven by the driving mechanism to abut against the workpiece notch side wall, and an end of the swing lever abuts against the workpiece notch bottom.

3. The pressing device for the workpiece with the notch according to claim 2, wherein the swing rod is arranged on the mounting seat in a penetrating manner, a gap for the swing rod to swing is reserved on the mounting seat, and the driving mechanism is arranged on one side of the mounting seat, which is away from the workpiece.

4. The pressing device for the workpiece with the notch according to claim 2, wherein the driving mechanism comprises a stretching cylinder and a jacking cylinder, the stretching cylinder and the jacking cylinder are respectively arranged at two sides of the oscillating rod, and the oscillating rod oscillates on the same vertical plane through the telescopic motion of the stretching cylinder and the jacking cylinder.

5. The pressing device for workpiece with notch as claimed in claim 1, wherein the mounting seat further has a support block, and the support block abuts against the peripheral wall surface of the notch of the workpiece.

6. The pressing device for workpiece with notch as claimed in claim 5, wherein the supporting block is provided with a notch for the swing lever to pass through, and a rotation shaft horizontally extended from the notch toward the swing lever, the rotation shaft passing through the swing lever and being used for rotation of the swing lever.

7. The pressing device for the workpiece with the notch according to claim 1, wherein the pressing mechanism comprises a first pressing mechanism and a second pressing mechanism, the first pressing mechanism is arranged at the circumferential side wall of the workpiece and fixes the circumferential side wall of the workpiece, and the pressing end of the second pressing mechanism is opposite to the abutting mechanism.

8. The apparatus according to claim 1, wherein the mounting base further comprises a plurality of positioning pins for positioning the workpiece.

9. A press-pin device comprising the pressing device for the workpiece with the notch according to any one of claims 1 to 8, characterized by further comprising an assembling mechanism, wherein the assembling mechanism is arranged corresponding to the workpiece pressed and fixed on the mounting seat and is used for realizing the press-pin of the side wall of the workpiece.

10. The apparatus according to claim 9, wherein the assembling mechanism comprises a pressing cylinder, and a pressing head is provided at the end of the piston rod of the pressing cylinder, and the pressing head faces the pressing pin hole of the workpiece.