CN220850273U - A high-precision multi-press head equal pressure pressing device - Google Patents

Abstract

The utility model discloses a high-precision multi-pressure head equal-pressure press-fitting device, which comprises: roof, lie in roof upper portion and be used for driving the roof straight line drive who reciprocates, lie in the pressure head subassembly of roof lower part, pressure head subassembly includes: the top of the side plate is fixed with the top plate, one side surface of the side plate is a pressure head mounting surface, the number of the pressure head units is n, and n is a natural number greater than 2; and n sets of ram units are arranged on the ram mounting surface at intervals, wherein the ram units comprise: guide rail, guide block, pressure head piece and spring, guide rail fixed mounting is in one side of curb plate, and the guide block slides with the guide rail and links to each other, and the guide rail constitutes the slip guide structure of vertical setting with the guide block, and the opposite side and the pressure head piece of guide block are fixed to link to each other. Compared with the prior art, the utility model can press-fit a plurality of workpieces simultaneously, has the advantages of high press-fit precision and balanced press-fit pressure, and has the advantages of compact arrangement structure, reasonable layout and small volume.

Description

A high-precision multi-press head equal pressure pressing device

Technical Field

The utility model belongs to the technical field of tooling fixtures, and in particular relates to a high-precision multi-pressure pressing device.

Background technique

When processing products, it is sometimes necessary to glue one workpiece to another workpiece (for example, when producing magnet assemblies, it is necessary to glue a metal sheet to the end of the magnet body), and use a pressing device to apply a certain pressure to the bonded product to make the glue even and at the same time expel the air between the two workpieces so that multiple workpieces fit tightly. The pressing device presses and maintains the pressure for a period of time before withdrawing, so that a stable bond between the workpieces can be achieved.

The press-fitting device in the prior art is a simple telescopic rod press-fitting structure, which realizes press-fitting by linearly driving the movement of the press head.

The disadvantage of the prior art is that when there are many workpieces to be pressed at the same time and the pressing accuracy is high, the pressing force of the pressing device on each workpiece is required to be the same, and the movement accuracy of each pressing head is high. However, the pressing device in the prior art has low accuracy and uneven downward pressure, which cannot meet the above requirements.

Therefore, it is necessary to provide a new high-precision multi-pressure pressing device to solve the above-mentioned technical problems.

Utility Model Content

1. Technical issues to be resolved

Based on this, the utility model provides a high-precision multi-press head equal pressure press-fitting device to solve the problem that the existing press-fitting device cannot meet the requirements of high-precision equal pressure.

(II) Technical solution

In order to solve the above technical problems, the utility model proposes a high-precision multi-pressure pressing device, comprising: a top plate, a linear drive located at the upper part of the top plate and used to drive the top plate to move up and down, and a pressure head assembly located at the lower part of the top plate, the pressure head assembly comprising: a side plate and a pressure head unit, the top of the side plate is fixed to the top plate, one side of the side plate is a pressure head mounting surface, the number of the pressure head units is n sets, n is a natural number greater than 2; and the n sets of the pressure head units are arranged at intervals on the pressure head mounting surface, wherein the pressure head unit comprises: a guide rail, a guide block, a pressure head block and a spring, the guide rail is fixedly installed on one side of the side plate, the guide block is slidably connected to the guide rail, and the guide rail and the guide block form a vertically arranged sliding guide structure, the other side of the guide block is fixedly connected to the pressure head block, the bottom of the side plate is provided with a limiting step for preventing the guide block from falling out of the guide rail downward, and the two ends of the spring are respectively abutted against the pressure head block and the top plate.

Preferably, a concave spring groove is provided on the top of the pressure head block, the lower part of the spring is accommodated in the spring groove, and the lower end of the spring abuts against the bottom of the spring groove.

Preferably, the pressure head assembly is comprised of two sets, the two sets of the pressure head assembly are spaced apart and symmetrically arranged on both sides of the top plate, and the pressure head mounting surfaces of the two side plates in the two sets of the pressure head assembly are arranged opposite to each other; the top plate and the two side plates together form a receiving cavity opening downward, and the upper parts of all the pressure head units are located in the receiving cavity.

Preferably, n first mounting grooves are recessed on the pressure head mounting surface, a first threaded hole is provided at the bottom of each first mounting groove, a guide rail is installed in each first mounting groove, a first countersunk hole is provided at the position of the guide rail corresponding to the first threaded hole, and a threaded connecting piece is passed through the first countersunk hole and extends into the first threaded hole to fix the guide rail to the side panel.

Preferably, the two sides in the thickness direction of the guide rail are respectively a mounting side and a guide side, the mounting side is accommodated in the first mounting groove, the guide side extends out of the first mounting groove, the guide block is sleeved outside the guide side, and a side surface of the guide block close to the side plate abuts against the pressure head mounting surface, and the guide block is slidingly connected to the guide side; an arc-shaped groove is respectively provided at both ends of the guide side in the width direction, and arc-shaped protrusions cooperating with the arc-shaped groove are provided on both sides of the guide block, and the arc-shaped protrusions are arranged in the arc-shaped groove.

Preferably, both ends of the lower part of the top plate are respectively provided with recesses to form installation steps, the tops of the two side plates are respectively abutted against the two installation steps, and the other side surface of the side plate is an outer alignment surface, and the outer alignment surface is aligned with the side surface of the top plate; the top plate and the two side plates together constitute a mounting frame, and the outer corners of the mounting frame are all rounded transition structures; the pressure head mounting surface is also provided with a raised reinforcement block, and the reinforcement block is located on both sides of the guide block.

Preferably, a second mounting groove is provided in the form of a depression on a side of the pressure head block close to the guide block, a second countersunk hole connected to the second mounting groove is provided on a side of the pressure head block away from the guide block, a side of the guide block away from the guide rail is accommodated in the second mounting groove, and a second threaded hole corresponding to the second countersunk hole is also provided on the guide block, and a threaded connecting member penetrates the second countersunk hole and extends into the second threaded hole, so that the pressure head block and the guide block are fixedly connected.

Preferably, a raised pressing block is provided on the bottom surface of the pressing head block, and the bottom surface of the pressing block is a pressing working surface, and the shape of the pressing working surface matches the shape of the workpiece to be pressed; the area of the pressing working surface is smaller than the area of the bottom surface of the pressing head block.

Preferably, a third countersunk hole is respectively provided at both ends of the top plate, and a third threaded hole matching the third countersunk hole is provided at the top of the side plate. A threaded connector penetrates the third countersunk hole and extends into the third threaded hole to achieve fixed connection between the top plate and the side plate.

Preferably, the linear drive is a pneumatic cylinder, an oil cylinder or an electric cylinder, and the spring is a compression spring.

(III) Beneficial effects

Compared with the prior art, the high-precision multi-press head equal pressure pressing device of the utility model can press multiple workpieces at the same time, and has the advantages of high pressing accuracy and balanced pressing pressure. The high-precision multi-press head equal pressure pressing device of the utility model also has the advantages of compact structure, reasonable layout and small size.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a perspective schematic diagram of the utility model in one direction;

FIG2 is a three-dimensional schematic diagram of the utility model from another direction;

Fig. 3 is a front cross-sectional view of the present invention;

Fig. 4 is a left side cross-sectional view of the present invention;

FIG5 is a bottom view schematic diagram of the utility model;

FIG6 is a partial enlarged view of point A in FIG5 ;

FIG7 is a perspective schematic diagram of a side panel in the present invention;

FIG8 is a perspective schematic diagram of a top plate in the present invention;

FIG9 is a second perspective schematic diagram of the top plate of the present invention;

FIG10 is a perspective schematic diagram of a press-fitted component in the present invention;

FIG11 is a second perspective schematic diagram of a press-fitting member in the present invention;

FIG12 is a perspective view of a sliding guide structure according to the present invention;

FIG. 13 is a second perspective schematic diagram of the sliding guide structure in the present invention.

Description of reference numerals:

1. Side plate; 2. Guide rail; 3. Guide block; 4. Pressure head block; 5. Spring; 6. Accommodation chamber; 7. Top plate; 8. Pressure block; 9. Linear drive;

11. Press head mounting surface; 12. Position limiting step; 13. First mounting groove; 14. First threaded hole; 15. Outer alignment surface; 16. Third threaded hole; 17. Reinforcement block;

21. Installation side; 22. Guide side; 23. Arc-shaped groove; 24. First countersunk hole;

31. second threaded hole; 32. arc-shaped protrusion;

41. Spring slot; 42. Second mounting slot; 43. Second countersunk hole;

71. Installation step; 72. Third countersunk hole;

81. Press down the working surface.

Detailed ways

In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

The high-precision multi-pressure pressing device of the utility model will be further described below in conjunction with Figures 1-13.

Please refer to Figures 1-7. The utility model discloses a high-precision multi-pressure pressing device, including: a top plate 7, a linear drive 9 located on the upper part of the top plate 7 and used to drive the top plate 7 to move up and down, and a pressure head assembly located at the lower part of the top plate 7. The pressure head assembly includes: a side plate 1 and a pressure head unit. The top of the side plate 1 is fixed to the top plate 7, and one side of the side plate 1 is a pressure head mounting surface 11. The number of pressure head units is n sets, and n is a natural number greater than 2; and the n sets of pressure head units are arranged on the pressure head mounting surface 11 at intervals, wherein the pressure head unit includes: a guide rail 2, a guide block 3, a pressure head block 4 and a spring 5. The guide rail 2 is fixedly installed on one side of the side plate 1, and one side of the guide block 3 is slidably connected to the guide rail 2, and the guide rail 2 and the guide block 3 form a vertically arranged sliding guide structure, and the other side of the guide block 3 is fixedly connected to the pressure head block 4. The bottom of the side plate 1 is provided with a limiting step 12 for preventing the guide block 3 from falling out of the guide rail 2 downward, and the two ends of the spring 5 are respectively abutted against the pressure head block 4 and the top plate 7.

More specifically, the high-precision multi-press head and other pressure press-fitting device includes a press-fitting state and a relaxed state. When the high-precision multi-press head and other pressure press-fitting device is in the press-fitting state, the spring 5 is in a contracted state, and there is a gap between the guide block 3 and the limiting step 12. When the high-precision multi-press head and other pressure press-fitting device is in a relaxed state, the spring 5 is in an extended state, and the guide block 3 abuts against the limiting step 12. When the guide block 3 slides, its upper limiting member is the top plate 7, and its lower limiting member is the limiting step 12.

In this embodiment, the pressure head block 4 is used to contact with the workpiece to be pressed and press the workpiece. For example, when the workpiece to be pressed is a magnet assembly, the magnet assembly includes a magnet body and a first metal sheet and a second metal sheet bonded to the upper and lower parts of the magnet body respectively. When in use, the magnet assembly is arranged below the high-precision multi-pressure head pressure pressing device of the utility model, and a set of magnet assemblies is provided directly below each pressure head block 4. In specific implementation, the side of the magnet assembly can be limited in advance.

The linear drive 9 is used to provide linear telescopic power, which is connected to the top plate 7 to drive the top plate 7 to telescope up and down. When the linear drive 9 extends downward, it drives the top plate 7 to move downward with the pressure head assembly as a whole. When the pressure head block 4 contacts the workpiece to be pressed, the spring 5 begins to shrink. After reaching the preset pressing position, the linear drive 9 stops. A spring 5 is provided on the top of each pressure head block 4. Under the action of the spring 5, the same clamping force can be achieved on each workpiece to be pressed, ensuring the balance of the downward pressure and achieving isobaric pressing. When the pressure head block 4 moves up and down, the sliding guide structure is always the moving guide of the pressure head block 4, ensuring the accuracy of the up and down movement of each pressure head block 4, so that the pressure head block 4 can be accurately aligned with the workpiece to be pressed below. When the telescopic drive shrinks upward, under the action of the elastic force of the spring 5, the pressure head block 4 returns to its original position.

According to a specific embodiment of the utility model, a concave spring groove 41 is provided on the top of the pressure head block 4 , the lower part of the spring 5 is accommodated in the spring groove 41 , and the lower end of the spring 5 abuts against the bottom of the spring groove 41 .

In the present embodiment, the spring groove 41 is used to guide the extension and retraction of the spring 5 to prevent the spring 5 from becoming unstable. On the other hand, the spring groove 41 accommodates the lower part of the spring 5, and combined with the top limiting function of the top plate 7, the spring 5 can be limited to ensure that the spring 5 moves within a predetermined range.

According to a specific implementation of the utility model, there are two sets of pressure head assemblies, which are spaced apart and symmetrically arranged on both sides of the top plate 7, and the pressure head mounting surfaces 11 of the two side plates 1 in the two sets of pressure head assemblies are arranged opposite to each other; the top plate 7 and the two side plates 1 together form a receiving cavity 6 with an opening facing downward, and the upper parts of all pressure head units are located in the receiving cavity 6.

In this embodiment, the top plate 7 and the two side plates 1 together form a mounting frame with a lower opening. The mounting frame adopts a split structure, which is convenient for the installation of the pressure head unit. During installation, two sets of pressure head assemblies can be assembled separately first, and then the top plate 7 can be installed. By setting two sets of pressure head assemblies, the number of pressure head blocks 4 can be doubled, so that one press-fitting action can press twice as many workpieces, which greatly improves the workpiece press-fitting efficiency. The two sets of pressure head assemblies are relatively arranged structures, and the pressure head installation surface 11 faces inward, so that the components that need to be moved (guide block 3, pressure head block 4 and spring 5) are all located between the two side plates 1, and the lower opening of the receiving cavity 6 is used for the pressure head block 4 to extend and retract to act on the workpiece to be pressed. With this structure, the overall safety performance of the utility model can be improved.

According to a specific implementation of the utility model, n first mounting grooves 13 are recessed on the pressure head mounting surface 11, a first threaded hole 14 is provided at the bottom of each first mounting groove 13, a guide rail 2 is installed in each first mounting groove 13, a first countersunk hole 24 is provided at the position of the guide rail 2 corresponding to the first threaded hole 14, and a threaded connection piece penetrates the first countersunk hole 24 and extends into the first threaded hole 14, so as to fix the guide rail 2 on the side panel 1.

In this embodiment, the first installation groove 13 is provided to facilitate the rapid positioning and installation of the guide rail 2, and after the first installation groove 13 is provided, one side of the guide rail 2 in the thickness direction is accommodated in the first installation groove 13, so that the space occupied by the sliding guide structure can be reduced, making the structure more compact. When installing the pressure head assembly, the guide rail 2 is first fixedly installed at the first installation groove 13 using a countersunk screw, and the head of the countersunk screw is completely accommodated in the countersunk hole, providing sufficient space for the installation and sliding of the guide block 3, and then the guide block 3 is inserted downward from the top side of the guide rail 2 in the length direction, and the lower part of the guide block 3 is limited by the limiting step 12.

According to a specific implementation of the utility model, the two sides of the guide rail 2 in the thickness direction are respectively a mounting side 21 and a guide side 22, the mounting side 21 is accommodated in the first mounting groove 13, the guide side 22 extends out of the first mounting groove 13, the guide block 3 is sleeved outside the guide side 22, and the side surface of the guide block 3 close to the side plate 1 abuts against the pressure head mounting surface 11, and the guide block 3 is slidably connected to the guide side 22; an arc-shaped groove 23 is respectively provided at both ends of the guide side 22 in the width direction, and arc-shaped protrusions 32 cooperating with the arc-shaped groove 23 are provided on both sides of the guide block 3, and the arc-shaped protrusions 32 are arranged in the arc-shaped groove 23.

In this embodiment, the installation side 21 is used to cooperate with the first installation groove 13 to achieve rapid positioning and installation of the guide rail 2, and the guide side 22 is used to cooperate with the guide block 3 to form a sliding structure. The arc-shaped protrusion 32 cooperates with the arc-shaped groove 23. On the one hand, it can further improve the guiding accuracy of the guide rail 2. On the other hand, after the installation is completed, a radial limiting structure is formed to prevent the guide block 3 from radially falling out of the guide rail 2 along the guide rail 2.

Please refer to Figures 7-8. According to the specific implementation mode of the utility model, the two ends of the lower part of the top plate 7 are respectively provided with recessed installation steps 71, the tops of the two side plates 1 are respectively abutted against the two installation steps 71, and the other side of the side plate 1 is an outer alignment surface 15, and the outer alignment surface 15 is aligned with the side of the top plate 7; the top plate 7 and the two side plates 1 together constitute a mounting frame, and the outer corners of the mounting frame are all rounded transition structures; a raised reinforcement block 17 is also provided on the pressure head mounting surface 11, and the reinforcement block 17 is located on both sides of the guide block 3.

In this embodiment, by providing the installation step 71, the side panel 1 is easily positioned and installed quickly. The outer corners of the mounting frame are rounded, which is beneficial to protect the operator and improve the safety of the utility model. The reinforcement block 17 is used to increase the overall strength of the side panel 1. In specific implementation, the side panel 1 is preferably processed from a whole piece of material, and after the grooves and holes are formed by a material removal processing method, an integrated side panel 1 structure is obtained, which is beneficial to further improve the overall mechanical properties of the side panel 1.

Please focus on Figures 10-13. According to the specific implementation mode of the utility model, a second mounting groove 42 is provided on the side of the pressure head block 4 close to the guide block 3, and a second countersunk hole 43 connected with the second mounting groove 42 is provided on the side of the pressure head block 4 away from the guide block 3. The side of the guide block 3 away from the guide rail 2 is accommodated in the second mounting groove 42. A second threaded hole 31 corresponding to the second countersunk hole 43 is also provided on the guide block 3. A threaded connecting piece penetrates the second countersunk hole 43 and extends into the second threaded hole 31, so that the pressure head block 4 and the guide block 3 are fixedly connected.

In this embodiment, the second installation groove 42 is used to realize the rapid positioning and installation of the pressure head block 4, and after the pressure head block 4 is partially installed in the receiving groove, the overall thickness of the pressure head unit can be reduced, which is conducive to further reducing the overall volume of the utility model. The threaded connector is a countersunk screw, and the second countersunk hole 43 and the second threaded hole 31 are used to realize the fixed connection between the pressure head block 4 and the guide block 3, wherein: the second countersunk hole 43 receives the screw head of the countersunk screw to avoid protrusion.

According to a specific implementation of the utility model, a raised pressing block 8 is provided on the bottom surface of the pressing head block 4, and the bottom surface of the pressing block 8 is a pressing working surface 81, and the shape of the pressing working surface 81 matches the shape of the workpiece to be pressed; the area of the pressing working surface 81 is smaller than the area of the bottom surface of the pressing head block 4.

In this embodiment, the pressure head block 4 and the pressure block 8 form a press-fitted part, and the area of the pressing working surface 81 is smaller than the area of the bottom surface of the pressure head block 4, that is, a shrinkage structure is adopted there. With this structure, the overall volume of the pressure head block 4 can be ensured to be large, and there is enough space to form spring holes, countersunk holes and mounting grooves thereon. The volume of the pressure block 8 is small, which just matches the smaller size of the workpiece to be pressed. In this way, a large number of workpieces to be pressed can be densely arranged below the utility model. When pressing down, there are gaps between the pressure blocks 8 to ensure that each workpiece to be pressed is pressed separately.

During specific implementation, the shape of the pressing block 8 can be adjusted according to the needs of the product to press-fit products of various shapes. Therefore, the utility model can not only press-fit small workpieces, but also large workpieces.

Please focus on Figure 9. According to the specific implementation mode of the utility model, third countersunk holes 72 are respectively provided at both ends of the top plate 7, and a third threaded hole 16 matching the third countersunk hole 72 is provided on the top of the side plate 1. A threaded connector penetrates the third countersunk hole 72 and extends into the third threaded hole 16 to achieve fixed connection between the top plate 7 and the side plate 1.

According to a specific implementation of the utility model, the linear drive 9 is a pneumatic cylinder, an oil cylinder or an electric cylinder, and the spring 5 is a compression spring.

It should be noted that, referring to FIG. 12 , in the present invention, the thickness direction of the guide rail 2 is the X-axis direction; the width direction of the guide rail 2 is the Y-axis direction; and the length direction of the guide rail 2 is the Z-axis direction.

In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements, or it can be a "transmission connection", that is, a power connection through various appropriate methods such as belt drive, gear drive or sprocket drive. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims (10)

1. A high-precision multi-pressure pressing device, characterized in that it comprises: a top plate, a linear drive located at the upper part of the top plate and used to drive the top plate to move up and down, and a pressure head assembly located at the lower part of the top plate, the pressure head assembly comprises: a side plate and a pressure head unit, the top of the side plate is fixed to the top plate, one side of the side plate is a pressure head mounting surface, the number of the pressure head units is n sets, n is a natural number greater than 2; and the n sets of the pressure head units are arranged on the pressure head mounting surface at intervals, wherein the pressure head unit comprises: a guide rail, a guide block, a pressure head block and a spring, the guide rail is fixedly installed on one side of the side plate, the guide block is slidably connected to the guide rail, and the guide rail and the guide block form a vertically arranged sliding guide structure, the other side of the guide block is fixedly connected to the pressure head block, the bottom of the side plate is provided with a limiting step for preventing the guide block from falling out of the guide rail downward, and the two ends of the spring are respectively abutted against the pressure head block and the top plate. 2. The high-precision multi-pressure pressing device according to claim 1 is characterized in that a spring groove is provided on the top of the pressure head block, the lower part of the spring is accommodated in the spring groove, and the lower end of the spring abuts against the bottom of the spring groove. 3. The high-precision multi-pressing and equal-pressure pressing device according to claim 2 is characterized in that the press head assembly is in two sets, and the two sets of the press head assembly are spaced and symmetrically arranged on both sides of the top plate, and the press head mounting surfaces of the two side plates in the two sets of the press head assembly are arranged opposite to each other; the top plate and the two side plates together form a receiving cavity with an opening facing downward, and the upper parts of all the press head units are located in the receiving cavity. 4. The high-precision multi-pressure pressing device according to claim 3 is characterized in that n first mounting grooves are recessed on the pressure head mounting surface, a first threaded hole is provided at the bottom of each first mounting groove, a guide rail is installed in each first mounting groove, a first countersunk hole is provided at the position of the guide rail corresponding to the first threaded hole, and a threaded connecting piece passes through the first countersunk hole and extends into the first threaded hole to fix the guide rail to the side panel. 5. The high-precision multi-pressure pressing device according to claim 4 is characterized in that the two sides in the thickness direction of the guide rail are respectively a mounting side and a guide side, the mounting side is accommodated in the first mounting groove, the guide side extends out of the first mounting groove, the guide block is sleeved outside the guide side, and a side surface of the guide block close to the side plate abuts against the pressure head mounting surface, and the guide block is slidingly connected to the guide side; an arc-shaped groove is respectively provided at both ends of the guide side in the width direction, and arc-shaped protrusions cooperating with the arc-shaped groove are provided on both sides of the guide block, and the arc-shaped protrusions are arranged in the arc-shaped groove. 6. The high-precision multi-pressure pressing device according to claim 5 is characterized in that the two ends of the lower part of the top plate are respectively provided with depressions to form installation steps, the tops of the two side plates are respectively abutted against the two installation steps, and the other side surface of the side plate is an outer alignment surface, and the outer alignment surface is aligned with the side surface of the top plate; the top plate and the two side plates together constitute a mounting frame, and the outer corners of the mounting frame are all rounded transition structures; the pressure head mounting surface is also provided with a raised reinforcement block, and the reinforcement block is located on both sides of the guide block. 7. The high-precision multi-pressure pressing device according to claim 6 is characterized in that a second mounting groove is provided on the side of the pressure head block close to the guide block, and a second countersunk hole connected to the second mounting groove is provided on the side of the pressure head block away from the guide block, and the side of the guide block away from the guide rail is accommodated in the second mounting groove, and a second threaded hole corresponding to the second countersunk hole is also provided on the guide block, and a threaded connecting piece passes through the second countersunk hole and extends into the second threaded hole to realize the fixed connection between the pressure head block and the guide block. 8. The high-precision multi-pressure pressing device according to claim 7 is characterized in that a raised pressure block is provided on the bottom surface of the pressure head block, and the bottom surface of the pressure block is a downward pressing working surface, and the shape of the downward pressing working surface matches the shape of the workpiece to be pressed; the area of the downward pressing working surface is smaller than the area of the bottom surface of the pressure head block. 9. The high-precision multi-pressure pressing device according to claim 8 is characterized in that third countersunk holes are respectively provided at both ends of the top plate, and a third threaded hole matching the third countersunk hole is provided on the top of the side plate, and a threaded connecting part penetrates the third countersunk hole and extends into the third threaded hole to achieve fixed connection between the top plate and the side plate. 10. The high-precision multi-press head equal pressure pressing device according to claim 9, characterized in that the linear drive is a pneumatic cylinder, an oil cylinder or an electric cylinder, and the spring is a compression spring.