CN215469683U

CN215469683U - Clamp for machining cylinder cover

Info

Publication number: CN215469683U
Application number: CN202121771039.5U
Authority: CN
Inventors: 帅虎; 廖柳青; 李建清; 王少宇
Original assignee: Guangzhou Diesel Engine Factory Co ltd
Current assignee: Guangzhou Diesel Engine Factory Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-01-11
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a clamp for processing a cylinder cover, which comprises a bottom plate, a panel, a positioning component and a fastening component, wherein the bottom plate is fixedly arranged on a workbench of a machine tool, the panel is used for placing the cylinder cover and is arranged on the bottom plate through a rotating shaft, the panel can rotate around the rotating shaft to adjust the position of the cylinder cover, the positioning component is used for determining the relative position between the panel and the bottom plate under the condition that the panel is rotated to adjust the position, and the fastening component is used for fixing the relative position between the panel and the bottom plate. The design anchor clamps are installed the cylinder head on the workstation of lathe, and the cylinder head is placed in on the panel, therefore when adjusting the cylinder head position, rotates the panel, compares in the workstation of rotating the lathe, and is more laborsaving. The utility model can be widely applied to the technical field of machining.

Description

Clamp for machining cylinder cover

Technical Field

The utility model relates to the technical field of machining, in particular to a clamp for machining a cylinder cover.

Background

The cylinder cover is one of the most complex parts on the diesel engine, an air cavity, a water cavity and an oil cavity are arranged in the cylinder cover, the air cavity is also provided with different channels for air intake, exhaust and the like, the channel walls are as thin as several millimeters, the different channels cannot be communicated, the internal structure of the cylinder cover is formed by casting and drilling, and once the position of the drilling is deviated, the different channels can be drilled through, so that the parts are scrapped. The lateral surface of the outer side of the part is distributed with a plurality of holes and plug screw holes which form different angles with the horizontal angle, the holes need to be drilled and tapped, some holes are positioned near the exhaust valve hole and communicated with the water cavity of the cylinder cover, but can not be drilled to the exhaust valve hole, otherwise, the cylinder cover is scrapped.

The machining of each angle hole and the plug screw hole of the cylinder cover is completed by a boring machine, a workbench of the machine tool can rotate at any angle, and once rotation positioning calibration is needed when a hole of an angle surface is machined. However, the rotation of the worktable needs to be directly driven by manpower, the worktable surface cannot be accurately positioned, and the correct rotation angle needs to be determined by looking at the scale of the rotating disk below the worktable.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above technical problems, the present invention provides a fixture for processing a cylinder head, which adopts the following technical scheme:

the clamp for processing the cylinder cover comprises a base plate, a panel, a positioning component and a fastening component, wherein the base plate is fixedly arranged on a workbench of a machine tool, the panel is used for placing the cylinder cover and is arranged on the base plate through a rotating shaft, the panel can rotate around the rotating shaft to adjust the orientation of the cylinder cover, the positioning component is used for determining the relative position between the panel and the base plate under the condition that the panel is rotated to adjust the position, and the fastening component is used for fixing the relative position between the panel and the base plate.

In some embodiments of the present invention, the positioning component includes a positioning pin and a pin seat, the pin seat is used for connecting one of the panel and the bottom plate, the positioning pin is connected with the pin seat, the positioning pin is used for being inserted into a pin hole provided on the other one of the panel and the bottom plate, the pin hole is provided in plurality, and each pin hole is circumferentially provided around the rotating shaft.

In some embodiments of the present invention, the positioning pin includes a pin handle, a pin guide, a pin member, and an elastic member, the pin member penetrates through the pin guide, the elastic member is sleeved on the pin member, and the pin member is connected to the pin handle.

In some embodiments of the utility model, a first end of the pin guide sleeve is used for being inserted into the pin seat, and a side wall of a second end of the pin guide sleeve is provided with a limit groove which is arranged along the length direction of the pin guide sleeve; the positioning bolt comprises a limiting piece, the limiting piece is arranged on the side wall of the bolt part, and the limiting piece is positioned in the limiting groove under the condition that the bolt part penetrates through the bolt guide sleeve and is inserted into the bolt hole; and under the condition that the bolt part retreats and is separated from the bolt hole, the limiting part moves out of the limiting groove, and the bolt part is rotated to enable the limiting part to abut against the end face of the second end of the bolt guide sleeve.

In some embodiments of the utility model, the fastening member includes a first fastening member and a first connecting member, the first connecting member is connected with the bottom plate or the face plate, the first fastening member is connected with the first connecting member, the first fastening member is provided with two first clamping portions, the two first clamping portions are respectively used for connecting with the face plate and the bottom plate, and the first connecting member locks the first fastening member to fix the first fastening member with the face plate and the bottom plate respectively.

In some embodiments of the utility model, the panel and the bottom plate are respectively provided with a recessed first locking structure for connecting with the first clamping portion.

In some embodiments of the utility model, the fastening means comprises a second fastener and a second connector for securing the second fastener to the base plate, the second fastener being provided with a second clamping portion for connection with the panel, the second connector locking the second fastener to secure the second fastener to the panel.

In some embodiments of the utility model, a recessed second locking structure is provided on the panel for connection with the second clamping portion.

In some embodiments of the utility model, the clamp includes a plurality of clamping members coupled to the deck, the clamping members for securing the cylinder head to the deck, the clamping members including a columnar structure having one end for coupling to the deck and a first retaining member mounted to the other end of the columnar structure, the first retaining member pressing the cylinder head against the deck with the first retaining member mounted in tight engagement with the columnar structure.

In some embodiments of the utility model, the fixture includes a third locating member disposed on the deck for locating the position of the cylinder head on the deck.

The embodiment of the utility model has at least the following beneficial effects: the design anchor clamps are installed the cylinder head on the workstation of lathe, and the cylinder head is placed in on the panel, therefore when adjusting the cylinder head position, rotates the panel, compares in the workstation of rotating the lathe, and is more laborsaving. The utility model can be widely applied to the technical field of machining.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a view showing a structure in which a cylinder head is mounted on a jig;

FIG. 2 is a view showing the construction of a lower jig in section A-A of FIG. 1;

FIG. 3 is a view from E of FIG. 2;

FIG. 4 is a cross-sectional view taken at C-C of FIG. 1;

FIG. 5 is a view taken along line D of FIG. 1;

fig. 6 is a sectional view taken along line B-B in fig. 5.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., are used in an orientation or positional relationship indicated based on the drawings, it is merely for convenience of description and simplicity of description, and it is not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, is not to be considered as limiting the present invention. The features defined as "first" and "second" are used to distinguish feature names rather than having a special meaning, and further, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model relates to a clamp for machining a cylinder cover, which is arranged on a workbench of a machine tool and clamps and fixes the cylinder cover so as to machine each hole on the side surface of the cylinder cover. The fixture comprises a base plate 101 and a face plate 102, wherein the face plate 102 is used for placing the cylinder cover, the face plate 102 is arranged on the base plate 101, and the base plate 101 is fixedly arranged on a workbench of a machine tool. Further, the face plate 102 is rotatable on the base plate 101 to enable the table of the machine tool to be rotated without rotating the face plate to adjust the orientation of the cylinder head, it being understood that the clamp includes a securing member for securing the relative position between the face plate 102 and the base plate 101 after the face plate 102 is rotated into position. Further, the jig includes a positioning member for determining a relative position between the face plate 102 and the base plate 101 in a case where the face plate 102 is rotationally adjusted in position, and thereafter, the face plate 102 is fixed to the base plate 101 by a fastening member.

The clamp includes a plurality of clamping members that are coupled to the face plate 102 for securing the cylinder head to the face plate 102. Specifically, the clamp members are provided in three, the clamp members include a columnar structure 109 and a first locking member 110, the columnar structure 109 is provided to penetrate the cylinder head, one end of the columnar structure 109 is provided to be connected to the panel 102, and the first locking member 110 is mounted to the other end of the columnar structure 109. In some examples, the post 109 is threadably coupled to the faceplate 102, and the first securing member 110 is threadably coupled to the post 109. Referring to the figures, the cylindrical structure 109 is provided as a stud and the first locking member 110 is provided as a nut.

It will be appreciated that with the first retaining member 110 securely mounted to the pillar 109, the first retaining member 110 compresses the cylinder head against the face plate 102. Further, a gasket is sleeved on the columnar structure 109, and the first locking member 110 presses the cylinder head through the gasket.

Further, the fixture includes a third positioning member 111, the third positioning member 111 is disposed on the panel 102, the third positioning member 111 is disposed in at least two, and the third positioning member 111 is used for positioning the cylinder head on the panel 102. Specifically, the third positioning element 111 is a positioning block, the positioning block is mounted on the panel 102 through a screw or a bolt, and the third positioning element 111 has a positioning plane, and the positioning plane is attached to a plane on the outer side of the cylinder head, so that the cylinder head is accurately positioned. In some examples, the third positioning members 111 are provided in two, and the cylinder head is interposed between the two third positioning members 111.

The panel 102 is mounted on the base plate 101 by a rotary shaft 100, and the panel 102 is rotatable about the rotary shaft 100 to adjust the orientation of the cylinder head. Specifically, one end of the rotating shaft 100 is fixedly connected with the panel 102, and the other end is rotatably connected with the bottom plate 101, with reference to the drawings, the panel 102 is connected with the flange structure at the first end of the rotating shaft 100 through a screw or a bolt, the second end of the rotating shaft 100 is connected with the bottom plate 101 through a rolling bearing, and specifically, a deep groove ball bearing and a thrust angular contact ball bearing are sleeved on the second end of the rotating shaft 100. Further, the second end of the rotating shaft 100 is provided with a gasket and a double nut to realize the positioning of the rolling bearing.

Of course, alternatively, the panel 102 may be rotatably connected to one end of the rotating shaft 100, and the bottom plate 101 may be fixedly connected to the other end of the rotating shaft 100.

Further, the positioning member includes a positioning pin and a pin seat 103, the pin seat 103 is used for connecting one of the panel 102 and the bottom plate 101, the positioning pin is connected with the pin seat 103, the positioning pin is used for being inserted into a pin hole arranged on the other one of the panel 102 and the bottom plate 101, the pin holes are arranged in a plurality, and each pin hole is arranged circumferentially around the rotating shaft 100. It will be appreciated that each latch hole corresponds to a different angle, and that after rotating the face plate 102 to the desired angle, the locating latch is connected to the latch hole to determine the orientation of the desired location of the cylinder head.

Specifically, the latch seats 103 are provided at the side of the base plate 101 by screws or bolts, and the side of the face plate 102 is provided with a plurality of latch holes, and it should be noted that the sides of the base plate 101 and the face plate 102 refer to a ring-shaped sidewall. The side surfaces of the cylinder cover all need to be processed with holes, so that the processing can be started only after the relative positions of the bottom plate 101 and the panel 102 are determined and fixed, and the phenomenon that workpieces are scrapped due to the error of the drilling angle position on the cylinder cover is avoided. Further, after the positioning pin is fixedly connected with the pin seat 103, 0 ° mark lines are marked on the bottom plate 101 and the panel 102.

Referring to the drawings, the bolts or bolts connected between the pin base 103 and the side of the bottom plate 101 are arranged along the circumference of the bottom plate 101, and further, at least two first positioning members 118 are arranged on the pin base 103, the first positioning members 118 are cylindrical pins, the cylindrical pins penetrate through the pin base 103 along the radial direction of the bottom plate 101 and are connected with the side of the bottom plate 101, and the cylindrical pins are distributed along the rotation axis of the panel 102. It can be understood that pin base 103 and the side of bottom plate 101 are positioned and installed by using two connection structures which are staggered, so that the assembling precision of pin base 103 on bottom plate 101 is guaranteed.

The positioning bolt comprises a bolt handle 104, a bolt guide sleeve 112, a bolt part 105 and an elastic part 106, the bolt part 105 penetrates through the bolt guide sleeve 112, the elastic part 106 is set to be a compression spring, the elastic part 106 is sleeved on the bolt part 105, the bolt part 105 is connected with the bolt handle 104, and when the positioning bolt is installed with the bolt seat 103, the bolt guide sleeve 112 is installed with the bolt seat 103 through a plurality of screws or bolts. Latch member 105 is engaged with latch handle 104, and in particular, a first end of latch member 105 is adapted to be inserted into latch handle 104.

It will be appreciated that after the positioning pin is assembled with the pin holder 103, if it is desired to rotate the face plate 102, pull the pin handle 104, pull the pin member 105 out of the pin hole, rotate the face plate 102 until the next machining angle, and insert the pin member 105 into the pin hole under the elastic force of the elastic member 106. Referring to the drawings, the second end of the plug member 105 is adapted to be inserted into a plug hole in which a fixing drill bushing 114 is disposed, and the second end of the plug member 105 is inserted into the fixing drill bushing 114.

Further, latch handle 104 is secured to latch member 105 by a second retaining member configured as a cylindrical pin that extends laterally through the side wall of latch handle 104 and latch member 105 to secure a first end of latch member 105 to latch handle 104.

Referring to the drawings, a first end of the pin guide sleeve 112 is inserted into the pin seat 103, a second end of the pin part 105 is inserted into the pin guide sleeve 112, a side wall of the second end of the pin guide sleeve 112 is provided with a limit groove, the limit groove is arranged along the length direction of the pin guide sleeve 112, two opposite positions of the side wall of the pin guide sleeve 112 are respectively provided with a limit groove, and one end of the limit groove extends to an end surface of the second end of the pin guide sleeve 112 to form an open port. Further, the positioning pin includes a limiting member 113, the limiting member 113 is disposed on a sidewall of the pin member 105, and specifically, the limiting member 113 penetrates the sidewall of the pin member 105 to form two protruding limiting ends.

In the case where the plug member 105 is inserted into the plug hole through the plug guide sleeve 112, the stopper 113 is located in the stopper groove; pulling the bolt part 105 to withdraw from the bolt hole, correspondingly, the limiting part 113 withdraws from the limiting groove, rotating the bolt part 105, so that the limiting part 113 rotates along with the bolt part, and the limiting part 113 abuts against the end surface of the second end of the bolt guide sleeve 112. It can be understood that when the pin member 105 is required to be inserted into the pin hole, the pin member 105 is rotated to locate the position-limiting member 113 at the port of the position-limiting groove, and the pin member 105 is automatically inserted into the pin hole by the elastic member 106.

The fastening member includes a first fastening member 107 and a first connecting member, the first connecting member is a stud, the first connecting member is connected with the bottom plate 101 or the face plate 102, the first fastening member 107 is connected with the first connecting member, and the face plate 102 and the bottom plate 101 are fixed by the first fastening member 107. Referring to the drawings, in view of preventing the panel 102 from being displaced when the first fastening member 107 is installed, a first coupling member is provided at a side of the base plate 101, and the first fastening member 107 is installed on the first coupling member by a nut.

Specifically, the first fastening member 107 is provided with two first clamping portions, the two first clamping portions are oppositely arranged, the first clamping portions are convexly arranged relative to the side surfaces of the first fastening member 107, the two first clamping portions are respectively used for connecting with the panel 102 and the bottom plate 101, after the first fastening member 107 is installed, the side surfaces of the panel 102 and the side surfaces of the bottom plate 101 are positioned between the two first clamping portions, and the first fastening member 107 is locked by the first fastening member 107 so that the first fastening member 107 is respectively fixed with the panel 102 and the bottom plate 101.

Further, a recessed first locking structure is provided on the panel 102 and the bottom plate 101, respectively, for connecting with the first clamping portion. It will be appreciated that the first locking structure has a locking surface against which the clamping surface of the first clamping portion bears, the locking surface being designed with a slope or the clamping surface of the first clamping portion having a slope, and that when the first fastening member 107 is locked onto the first connecting member, the first fastening member 107 is pressed against the sides of the panel 102 and the base plate 101, so that the two first clamping portions fix the panel 102 and the base plate 101.

With reference to the figures, the first locking structure may be a notch-like structure on the side of the panel 102, and further, the first locking structure may be an annular groove along the circumference on the side of the panel 102.

Of course, alternatively, the edge of the upper end face of the panel 102 and the edge of the lower end face of the base plate 101 may also function as the first locking structure.

The fastening means includes a second fastening member 108 and a second connecting member, the second connecting member is provided as a screw, the second connecting member is provided as at least one, the second connecting member is used for fixing the second fastening member 108 on the base plate 101, and the second fastening member 108 is used for fixing the panel 102 and the base plate 101. Specifically, the second fastener 108 is provided with a second clamping portion for connection with the panel 102, and a second connector that secures the second fastener 108 to the panel 102.

Referring to the drawings, one end of the second fastening member 108 is used for mounting with a second connector, and a second clamping portion is provided at the other end of the second fastening member 108, the second clamping portion being protrudingly provided with respect to a side surface of the second fastening member 108. When the second fastening member 108 is fixed to the side of the base plate 101, the second clamping portion clamps the panel 102.

Further, a recessed second locking structure is provided on the panel 102 for connection with a second clamping portion. It will be appreciated that the second locking structure has a locking surface against which the clamping surface of the second clamping portion bears, the locking surface being designed with a slope or the clamping surface of the first clamping portion having a slope, such that when the second fastening member 108 is secured by the second connecting member, the second fastening member 108 is pressed against the side of the panel 102 and the base plate 101, so that the second clamping portion secures the panel 102.

With reference to the drawings, the second locking structure may be a notch-like structure on the side of the panel 102, and further, the second locking structure is an annular groove along the circumference on the side of the panel 102. It will be appreciated that in some examples the annular grooves in which the first and second locking formations are located are integral.

Of course, alternatively, the edge of the upper surface of the panel 102 may also serve as a second locking structure to achieve the connection with the second fastener 108.

The second fastening member 108 is provided with a second positioning hole, the second positioning hole is used for providing a second positioning member 115, the second positioning member 115 is provided as a cylindrical pin, and the second positioning member 115 is used for positioning the position between the second fastening member 108 and the bottom plate 101. Specifically, after the gap between the panels 102 is adjusted to be formed in the second fastening member 108, the second positioning member 115 is disposed in the second positioning hole, and the second positioning member 115 penetrates through the second fastening member 108 and is connected to the bottom plate 101, so as to ensure that the position of the second fastening member 108 is not changed, ensure the stability of the gap between the second fastening member 108 and the panels 102, and maintain the fixation between the panels 102 and the bottom plate 101.

Referring to the drawings, the second fastening members 108 are provided in two and the first fastening members 107 are provided in one, and it will be understood that the first fastening members 107 and the two second fastening members 108 are equally spaced along the circumference to uniformly apply the force to the panel 102 and the base plate 101 when fastened. The first fastening piece 107 is a movable pressing block, the two second fastening pieces 108 are fixed pressing blocks, in the installation process of the panel 102 and the bottom plate 101, the position of the first fastening piece 107 is fixed, the panel 102 and the bottom plate 101 are fixed, and then the two second fastening pieces 108 are locked.

Of course, in some examples, a plurality of first fastening members 107 or a plurality of second fastening members 108 may be alternatively provided to the clip, in which case, after each first fastening member 107 or each second fastening member 108 is fastened, the panel 102 is fixed to the bottom plate 101.

Referring to the drawings, a plurality of countersunk holes are circumferentially formed in the base plate 101, and the base plate 101 is fixed to a table of a machine tool by screws and T-shaped groove nuts. Further, a fourth positioning member 116 is disposed on the bottom plate 101, the fourth positioning member 116 is used for positioning the bottom plate 101 with a workbench of a machine tool, the fourth positioning member 116 is disposed at the bottom of the bottom plate 101, specifically, the fourth positioning member 116 is configured as a flat key, a T-slot is disposed on the workbench of the machine tool, and the flat key is connected with the T-slot to position the bottom plate 101 with the workbench of the machine tool.

Furthermore, the panel 102 is provided with an operation hole, so that a tool can conveniently penetrate through the operation hole to disassemble and assemble a screw or a nut when the bottom plate 101 and a workbench of a machine tool are disassembled and assembled, the operation hole is provided with a dust sealing piece 117, the dust sealing piece 117 is a nylon piece, and the dust sealing piece 117 is used for sealing the operation hole to prevent sundries from entering the operation hole.

In the description herein, references to the terms "one embodiment," "some examples," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like, if any, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A anchor clamps for processing cylinder head which characterized in that: comprises that

The base plate (101), the said base plate (101) is used for fixing and installing on the work level of the lathe;

a panel (102), on which the cylinder head is placed, the panel (102) being mounted on the base plate (101) by a rotating shaft (100), the panel (102) being rotatable about the rotating shaft (100) to adjust the orientation of the cylinder head;

positioning means for determining a relative position between the face plate (102) and the base plate (101) in the case where the face plate (102) is rotationally adjusted in position;

a fastening member for fixing a relative position between the panel (102) and the base plate (101).

2. The jig for machining a cylinder head according to claim 1, characterized in that: the positioning component comprises a positioning bolt and a bolt seat (103), the bolt seat (103) is used for connecting one of the panel (102) and the bottom plate (101), the positioning bolt is connected with the bolt seat (103), the positioning bolt is used for being inserted into a bolt hole formed in the other one of the panel (102) and the bottom plate (101), the number of the bolt holes is multiple, and each bolt hole is circumferentially arranged around the rotating shaft (100).

3. The jig for machining a cylinder head according to claim 2, characterized in that: the positioning bolt comprises a bolt handle (104), a bolt guide sleeve (112), a bolt part (105) and an elastic part (106), the bolt part (105) penetrates through the bolt guide sleeve (112), the elastic part (106) is sleeved on the bolt part (105), and the bolt part (105) is connected with the bolt handle (104).

4. The jig for machining a cylinder head according to claim 3, characterized in that: the first end of the bolt guide sleeve (112) is used for being inserted into the bolt seat (103), the side wall of the second end of the bolt guide sleeve (112) is provided with a limiting groove, and the limiting groove is arranged along the length direction of the bolt guide sleeve (112); the positioning bolt comprises a limiting piece (113), the limiting piece (113) is arranged on the side wall of the bolt part (105), and under the condition that the bolt part (105) penetrates through the bolt guide sleeve (112) and is inserted into the bolt hole, the limiting piece (113) is positioned in the limiting groove; and under the condition that the bolt part (105) retreats and is separated from the bolt hole, the limiting piece (113) moves out of the limiting groove, and the bolt part (105) is rotated to enable the limiting piece (113) to abut against the end face of the second end of the bolt guide sleeve (112).

5. The jig for machining a cylinder head according to claim 1, characterized in that: the fastening component comprises a first fastening piece (107) and a first connecting piece, the first connecting piece is connected with the bottom plate (101) or the panel (102), the first fastening piece (107) is connected with the first connecting piece, the first fastening piece (107) is provided with two first clamping portions, the two first clamping portions are respectively used for being connected with the panel (102) and the bottom plate (101), and the first connecting piece locks the first fastening piece (107) so that the first fastening piece (107) is respectively fixed with the panel (102) and the bottom plate (101).

6. The jig for machining a cylinder head according to claim 5, characterized in that: the panel (102) and the bottom plate (101) are respectively provided with a sunken first locking structure, and the first locking structures are used for being connected with the first clamping parts.

7. The jig for machining a cylinder head according to claim 1, 5 or 6, characterized in that: the fastening component comprises a second fastening piece (108) and a second connecting piece, the second connecting piece is used for fixing the second fastening piece (108) on the bottom plate (101), the second fastening piece (108) is provided with a second clamping part, the second clamping part is used for being connected with the panel (102), and the second connecting piece locks the second fastening piece (108) so as to fix the second fastening piece (108) with the panel (102).

8. The jig for machining a cylinder head according to claim 7, characterized in that: a recessed second locking structure is arranged on the panel (102) and used for being connected with the second clamping part.

9. The jig for machining a cylinder head according to claim 1, characterized in that: the clamp comprises a plurality of clamping components, wherein the clamping components are connected with the panel (102), the clamping components are used for fixing the cylinder cover on the panel (102), the clamping components comprise a columnar structure (109) and a first locking piece (110), one end of the columnar structure (109) is used for being connected with the panel (102), the first locking piece (110) is installed at the other end of the columnar structure (109), and the first locking piece (110) presses the cylinder cover on the panel (102) under the condition that the first locking piece (110) is installed and fastened with the columnar structure (109).

10. The jig for machining a cylinder head according to claim 1 or 9, characterized in that: the clamp comprises a third positioning piece (111), wherein the third positioning piece (111) is arranged on the panel (102), and the third positioning piece (111) is used for positioning the position of the cylinder cover on the panel (102).