CN211734510U - Workpiece fixing device for electroplating outside cylinder body tank - Google Patents

Abstract

The utility model discloses a workpiece fixing device for electroplating outside a tank of a cylinder body, which comprises a fixing frame and a pressing component; the fixing frame comprises a bottom plate and a frame fixed on the bottom plate; the pressing component is used for pressing the workpiece on the bottom plate The utility model cooperates with the auxiliary installation mechanism, and the auxiliary installation components can be installed on the utility model, so that the workpiece is fixedly installed in the utility model and then transferred to each station of electroplating, forming a modular fixation, which is convenient for replacement. The installation auxiliary mechanism can be applied to different workpieces, and it does not need to replace the anode, so there is no need to stop the production line. It is suitable for workpieces of various sizes, realizes "seamless switching" of products, avoids the loss of production capacity when the line is stopped, and quickly Meet delivery demands, minimize switchover time for mature products, and minimize capacity loss.

Description

Workholding device for electroplating outside the cylinder tank

technical field

The utility model relates to a part of a cylinder body electroplating device, in particular to a workpiece fixing device used for electroplating outside a cylinder body groove.

Background technique

As the main component of the engine, plunger pump, reciprocating compressor and other equipment, the cylinder block is used to form the working space together with the piston and the cylinder head; taking the engine as an example, it forms the combustion chamber and provides the movement trajectory for the piston assembly, thus forming a Power conversion environment. In the process of guiding the piston to reciprocate continuously, the inner wall of the cylinder and the piston rub against each other for a long time and at a high frequency, which reduces the useful power of the cylinder and consumes a part of the energy. In order to solve the above problems, the inner wall is electroplated, and the electroplating layer is used instead of the cylinder liner to solve the above problems. In the prior art, the circulating electroplating outside the tank ensures real-time replacement of cations on the coating layer, undifferentiated concentration and stable and uniform fluidity due to the formation of a flowing electroplating environment, ensuring the compactness of the coating layer and the quality of electroplating.

However, in the existing electroplating structure outside the tank, due to the different external dimensions of the cylinder (workpiece), the anode (especially the height) needs to be replaced to be used for the normal electroplating work, and the entire production line needs to be shut down to increase the loss and increase the production Moreover, the fixtures are also different, the structure is complex, and the replacement process needs to be carried out manually, which reduces the work efficiency.

Therefore, it is necessary to improve the existing cyclic electroplating tooling, which is versatile, suitable for workpieces of various sizes, realizes "seamless switching" of products, avoids the loss of production capacity due to stoppage, quickly meets the delivery demand, and converts mature products. Changeover times are minimized and capacity losses are minimized.

Utility model content

In view of this, the purpose of the present utility model is to provide a universal tooling for electroplating outside the engine block groove, which has versatility, is suitable for workpieces of various sizes, realizes "seamless switching" of products, and avoids the production capacity of line shutdown. Loss, quickly meet delivery needs, minimize switchover time for mature products, and minimize capacity loss.

The workpiece fixing device for electroplating outside the cylinder groove of the utility model comprises an installation frame assembly, and the installation frame assembly includes a fixing frame and a pressing assembly;

The fixing frame includes a base plate and a frame fixed on the base plate;

The pressing assembly is used for pressing and locking the workpiece on the base plate;

When the utility model is used, it is used in conjunction with the installation auxiliary components. After compensating for dimensions such as height and diameter, the workpiece is installed in the tooling and then transferred to each station of electroplating. In cooperation, different workpieces do not need to replace the anode, so there is no need to stop the production line. The replacement of different workpieces can be directly installed in the tool and placed in the electroplating device. The matching installation auxiliary components can also form a transition between the workpiece and the electroplating device. , compensating for the difference between the different inner diameters of different workpieces and the bottom plate, forming the versatility in height and diameter;

The installation auxiliary component can adopt a cylindrical structure, which is matched with the workpiece in height, so that the total height is matched with the height of the anode, and the inner diameter of the cylindrical structure is variable diameter, which is suitable for the transitional installation between the bottom plate and the workpiece. I will not repeat them here; of course, the structure of the installation auxiliary assembly is not necessarily a cylindrical shape, and can be any shape to achieve the above purpose, and I will not repeat it here;

The pressing component is installed on the fixing frame, which is used to form a pressing on the workpiece and the installation auxiliary components, so as to ensure the stability of the workpiece during transportation and the electroplating process, so as to ensure the electrical quality and the smooth progress of the electroplating process.

Further, the frame has a fixed upper longitudinal beam, the pressing component is arranged on the upper longitudinal beam, and is provided with a pressing part that can be driven to reciprocate up and down for pressing or releasing the workpiece; Any mechanical structure, including manual or electric, can be realized by using the existing mechanical structure, which will not be repeated here; as shown in the figure, the frame includes four detachable (bolt) uprights fixed on the bottom plate , two vertical columns are respectively arranged on both sides of the longitudinal direction (according to the direction of the arrangement of multiple workpieces), and the upper parts of the two columns are fixedly connected (bolts) with an upper beam, then the upper longitudinal beam is fixedly connected between the two upper beams. In the meantime, a stable structure of fixed connection is formed, which is not repeated here.

Further, the pressing assembly includes a pressing rod that can be driven to reciprocate up and down along the upper longitudinal beam and a lever assembly for driving the pressing rod to reciprocate, and the pressing part is located at the lower end of the pressing rod; the lever The assembly includes a driving lever and a rocker arm, the resistance end of the lever is rotatably hinged to the upper end of the pressing rod, the lower end of the rocker arm can rotate with a single degree of freedom relative to the upper longitudinal beam, and the upper end and the fulcrum of the driving lever can rotate coaxially with a single degree of freedom. Hinged; a limit block is provided on the rocker arm, and the limit block restricts the lever to continue to rotate in the pressing direction when the driving lever drives the pressing rod to press the workpiece to achieve locking;

The reciprocating motion of the pressing rod is generally a single degree of freedom, that is, only reciprocating movement. The pressing part can be integrally formed with the pressing rod or can be disassembled separately. Generally, a movable connection with the end of the compression rod with a certain degree of freedom is used, such as a movable head such as a ball twist, so as to adapt to the compression end face and ensure the coaxiality of the workpiece;

The upper end of the rocker arm is hinged with the fulcrum of the driving lever through the pivot hinge shaft, and the driving lever rotates around the pivot point under the action of external force, so that the resistance arm tends to be vertical from the lateral direction, thereby driving the pressing rod downward to press the workpiece, the rocker arm Under the lateral (no displacement) constraint of the pressing rod, it swings forward around its lower end. When the resistance arm presses the workpiece, the fulcrum axis at least intersects with the fulcrum hinge axis or exceeds the hinge axis backward, thereby forming self-locking and avoiding levers It rotates under the reaction force, and at the same time, the limit block restricts the lever to continue to rotate in the pressing direction, so as to avoid continuing to rotate, so as to drive the pressing rod upward, forming a self-locking pressing (that is, the mechanical structure composed of the pressing rod and the driving lever is similar to a connecting rod). Rod crank structure, but because it is limited by the limit block, it avoids the formation of a circular motion similar to the connecting rod crank, thereby forming self-locking).

Further, the pressing assembly also includes a base, the base is fixed on the upper longitudinal beam, the pressing rod can be arranged on the base to reciprocate up and down with a single degree of freedom, and the rocker arm is divided into two parts. Arranged on both sides of the base and the lower end is coaxially hinged to the base; when the pressing rod presses the workpiece through the pressing part, the axis of the pressing rod intersects or exceeds the axis of the fulcrum backward, at this time , the limit block is pressed against the resistance arm of the drive lever from the back side;

Further, the base is detachably and fixedly connected to the upper longitudinal beam, the driving lever is a right-angle structure bounded by a fulcrum, the resistance arm forms a fork-shaped groove, and the pressing rod is located in the fork-shaped groove and is hinged to the end of the resistance arm , the fork-shaped structure is conducive to stable connection and does not apply biasing force, so that the structure is stable and has a long life cycle; as shown in the figure, the driving lever is a right-angle structure bounded by a fulcrum, that is, at the fulcrum, the power arm folds forward Curved, easy to operate and does not interfere with the rocker arm (limit block);

The backward in the present invention refers to the direction in which the power arm swings when the driving lever presses the workpiece, and the back side is the side corresponding to the backward, which will not be repeated here.

Due to the action of the limit block, the resistance wall of the lever is prevented from continuing to rotate, and the rocker arm cannot continue to rotate under the action of the limit block, that is, an interlock is formed, and the axis of the pressing rod intersects or exceeds the limit The axis of the fulcrum (generally it is enough to intersect), that is, a stable retraction mechanism is formed to avoid loosening.

Further, the base includes a base plate and a guide sleeve, and the upper longitudinal beam is provided with a through hole for the pressing rod to pass through; the guide sleeve has a guide slide and is fixed on the base plate, and the guide slide The via hole on the upper longitudinal beam is vertically arranged, and the pressing rod passes through the guide slideway and cooperates with it to reciprocate up and down; the base plate and the upper longitudinal beam are detachably and fixedly connected; The lower ends of the two rocker arms are symmetrically hinged on both sides of the guide sleeve; the base plate and the upper longitudinal beam are detachably connected through connecting holes (bolts pass through, generally using waist-shaped holes), which has strong adaptability; guide The sleeve is fixed on the base plate by threaded connection, and the structure is simple; as shown in the figure, the lower end of the guide sleeve is machined with external threads, which are screwed on the internal threads of the base plate to form a connection. ;The lower end of the rocker arm is hinged on the guide sleeve, the structure is simple and practical, the whole locking assembly forms a module, and the hinged part is completely processed and then installed on the base plate;

Further, the bottom plate is provided with a positioning hole for positioning the bottom plate on the electroplating device and a functional hole for installing the workpiece.

Beneficial effects of the utility model: The workpiece fixing device used for electroplating outside the cylinder groove of the utility model enables the workpiece to be fixedly installed in the utility model and then moved to each station of electroplating, forming a modular fixation, which is convenient for replacement and cooperates with each other. With the installation auxiliary mechanism, it has strong adaptability. Different workpieces do not need to replace the anode, so there is no need to stop the production line. Workpieces, to achieve "seamless switching" of products, avoid production capacity loss due to line stoppage, quickly meet delivery requirements, minimize the switching time of mature products, and minimize production capacity loss.

Description of drawings

The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the perspective view of the utility model (installed on the device);

Fig. 2 is an enlarged view at Fig. 1A;

Fig. 3 is the structural sectional view of the utility model;

FIG. 4 is an enlarged view of FIG. 3B .

Detailed ways

Fig. 1 is a perspective view of the utility model (installed on the device), Fig. 2 is an enlarged view of Fig. 1A, Fig. 3 is a sectional view of the structure of the utility model, Fig. 4 is an enlarged view of Fig. 3B, as shown in the figure: State description The utility model, the workpiece fixing device for electroplating outside the cylinder groove of this embodiment, includes a fixing frame and a pressing assembly 1;

The fixing frame includes a base plate 2 and a frame fixed to the base plate;

When the utility model is used, it is matched with an installation auxiliary component for installing the workpiece, and after compensation in height and diameter, it is installed on the bottom plate and pressed by the pressing component 1, and the installation auxiliary component is also used for the electroplating solution. Introduced into the cylinder and used to pass through the anode; the workpiece is installed in the tooling and then transferred to each station of electroplating, and the overall height is adjusted to match the anode through the installation auxiliary components matched with the workpiece. The production line needs to be stopped, and different workpieces can be directly installed in this tooling and placed in the electroplating device. The matching installation auxiliary components can also form a transition between the workpiece and the electroplating device, compensating for the different inner diameters of different workpieces and the installation between the bottom plate Differences, resulting in versatility in height and diameter;

The installation auxiliary component can adopt a cylindrical structure, which is matched with the workpiece 9 in height, so that the total height is matched with the height of the anode, and the inner diameter of the cylindrical structure is variable diameter, which is suitable for the transition between the bottom plate and the inner diameter of the workpiece , which will not be repeated here; of course, the structure of the installation auxiliary assembly is not necessarily a cylindrical shape, and can be any shape to achieve the above purpose, and will not be repeated here;

The pressing component is installed on the fixing frame, which is used to form a pressing on the workpiece and the installation auxiliary components, so as to ensure the stability of the workpiece during transportation and the electroplating process, so as to ensure the electrical quality and the smooth progress of the electroplating process.

When the utility model is in use, the installation auxiliary component includes a diameter reducing compensator 3, which is a cylinder with an axial through hole and can be positioned and installed on the bottom plate and insulates the bottom plate from the electroplating environment, so the The axial through hole is communicated with the inner hole of the workpiece for passing through the anode and introducing the electroplating solution; the lower end of the different reducing compensator 3 has the same outer dimension, and the upper end has the inner diameter size adapted to the inner diameter of the corresponding workpiece, and the The total height of the reducing compensator after the workpiece is installed can be matched with the anode to complete electroplating, and when in use, the workpiece is axially pressed against the reducing compensator by the pressing component;

The bottom plate is provided with a positioning hole for positioning the bottom plate on the electroplating device and a functional hole for installing the workpiece. The functional hole can be a bottom plate channel for installing the components supporting the workpiece; workpieces (cylinders) of different heights and diameters Equipped with variable diameter compensators of different heights, so that the total height of the workpiece installed in the present invention remains unchanged and can be matched with the height of the anode; The fixed and constant diameter of the lower end can be installed with standard tooling, the upper end corresponds to the inner diameter of the corresponding workpiece (concentric with the same diameter), and the lower end is used to pass through the bottom plate channel (functional hole) of the bottom plate to match ( The bottom plate is isolated from the electroplating environment), the upper part is matched with the workpiece (different workpieces have different matching sizes), and the total height of the reducing compensator after the workpiece is installed makes it suitable for use with the anode height to complete the electroplating, so that the device It is versatile; the variable diameter compensator 3 is made of FRP material (of course, other non-conductive materials with certain strength can also be used, which will not be repeated here), which has an insulating effect and improves the electroplating efficiency.

In this embodiment, the auxiliary installation assembly further includes a shielding member, and the shielding member includes an upper shielding ring 7 and a lower shielding ring 10 made of non-metallic conductive materials, and the lower shielding ring 10 is coaxially embedded in the transformer. The diameter compensator 3 has an axial through hole and is axially abutted against the lower end of the workpiece 9 with the same diameter, and the upper shielding ring 7 and the upper end of the workpiece 9 have the same diameter and are pressed axially by the pressing component 1; the diameter reducing compensator It is made of non-conductive materials to ensure stable electroplating conditions at the conductive parts, avoiding material waste and interference to electroplating conditions; offsetting the same diameter refers to the inner diameter of the upper shielding ring 7 and the inner diameter of the lower shielding ring 10 and the inner diameter of the workpiece 9 The same and coaxial, during the electroplating process, the edge burrs generated in the electroplating process are led to the upper edge of the upper shielding ring and the lower edge of the lower shielding ring to ensure the quality of the electroplating. The upper shielding ring 7 and the lower shielding ring 10 are both. It is made of conductive material and will not be repeated here; of course, a radial seal needs to be formed between the upper shielding ring 7 and the lower shielding ring 10 and the workpiece 9 (cylinder) to prevent the leakage of the electroplating solution; structurally, the upper shielding ring Sealing rings 12 and 13 are respectively provided on the lower end face of 7 (contact and abut against the upper end face of the cylinder block) and the upper end face of the lower shielding ring 10 (contact and abut against the lower end face of the cylinder block) respectively (can be set on the corresponding end faces). The annular sealing ring groove is used to place the sealing ring), the material of the sealing ring is generally acid and alkali resistant fluororubber, and the purpose of sealing and contacting can be achieved by pressing and deforming by external force; the lower end of the inner circle of the upper shielding ring is formed Annular chamfering, the upper end of the inner circle of the lower shielding ring forms an annular chamfering, the chamfering structure can guide the burr to grow to the sudden change, and avoid the interference to the electroplating of the cylinder body. Interference; the upper shielding ring and the lower shielding ring are made of non-metallic conductive materials (such as conductive rubber or plastic). Non-metallic conductive materials generally have less bonding force with the metal coating), such as peeling off directly with a sharp tool, or using a small external force to deform the upper shielding ring and the lower shielding ring to peel off the coating, which can be peeled off by using a set elastic mold. The non-metallic conductive material of this elastic modulus can be deformed by a small external force (such as hand-holding), but it can also withstand the pressing force of the workpiece during electroplating to ensure the smoothness of the electroplating process. Therefore, the coating and burr of the inner circle of the shielding ring are separated from the inner circle of the shielding ring, and the shielding ring can be used twice. At the same time, the coating and burr of the inner circle can be recycled, reducing consumption and electroplating costs; The aluminum) coating and burrs are closely combined with the shielding ring and cannot fall off. It is treated by chemical de-coating, and a de-plating site needs to be provided. After the shielding ring is repeatedly de-plated, it will affect the later use and be scrapped, and the coating cannot be recycled. The waste liquid is discharged, causing great waste.

In this embodiment, the upper shielding ring and the lower shielding ring are both made of POM (polyoxymethylene) material added with carbon powder, and the addition ratio is less than or equal to 1% by mass fraction, preferably about 0.4%, which has good physical properties and It has good electrical conductivity and the coating is easy to fall off. It can be used for a long time without replacement, saving the cost of electroplating.

In this embodiment, the installation auxiliary assembly further includes a positioning sleeve 8, on which is installed a positioning pin 801 that cooperates with the mounting threaded hole on the workpiece 9, and is positioned by the positioning pin 801 so that the positioning sleeve and the workpiece are concentric, The upper shielding ring 7 is placed concentrically in the positioning sleeve 8 and is matched with the workpiece 9 concentrically and concentrically through the positioning sleeve 8;

The installation threaded hole on the workpiece 9 refers to the threaded hole on the end face of the workpiece. The purpose of the positioning sleeve is to use the matching between the positioning pin and the installation threaded hole (the positioning pin is inserted into the threaded hole to form positioning) to ensure the positioning sleeve 8 and the workpiece. Concentric, the upper shielding ring 7 is installed on the inner circle of the positioning sleeve to form the same diameter and coaxial matching with the workpiece; there are generally at least two positioning pins, and this embodiment is two symmetrically arranged to ensure positioning accuracy.

The specific installation process is as follows: position the variable diameter compensator 3 on the bottom plate 2 (a sealing ring can be used, and the sealing ring can be made of EVA foam), place the lower shielding ring 10 on the variable diameter compensator 3, and the lower end and the variable diameter compensation A seal can also be set between the parts 3 (the sealing method is not limited), and the sealing ring is placed at the set position of the upper end face of the lower shielding ring 10, the workpiece is placed on the lower shielding ring, and the upper shielding ring is placed after positioning by the positioning sleeve. The tightening device can be pressed tightly.

In this embodiment, the frame has a fixed upper longitudinal beam 6, the pressing assembly 1 is arranged on the upper longitudinal beam 6, and is provided with a pressing portion 5 that can be driven to reciprocate up and down for pressing or releasing. Workpiece 9; this structure can adopt any existing mechanical structure, including manual or electric, and can be realized by using the existing mechanical structure, which will not be repeated here; as shown in the figure, the frame includes four detachable ( Bolts) are fixed on the uprights 4 on the bottom plate 2, two uprights 4 are respectively arranged on both sides of the longitudinal direction (in the direction of the arrangement of multiple workpieces), and the upper parts of the two uprights 4 are fixedly connected (bolts) with the upper beam 12, then The upper longitudinal beam 6 is fixedly connected between the two upper transverse beams 12 to form a stable structure of fixed connection, which will not be repeated here.

In this embodiment, the pressing assembly 1 includes a pressing rod 101 that can be driven to reciprocate up and down along the upper longitudinal beam 6 and a lever assembly for driving the pressing rod 101 to reciprocate. The pressing portion 5 is located at The lower end of the pressing rod 101; the lever assembly includes a driving lever (including a power arm 1021 and a resistance arm 1022) and a rocker arm, and the resistance end of the lever (ie the end of the resistance arm) is rotatably hinged to the upper end of the pressing rod 101 , the lower end of the rocker arm can be rotated with a single degree of freedom relative to the upper longitudinal beam, and the upper end and the fulcrum of the driving lever can be pivoted coaxially with a single degree of freedom; the rocker arm is provided with a limit block 104, and the limit block 104 is in the drive lever. When the pressing rod 101 is driven to press the workpiece, the lever is restricted from continuing to rotate in the pressing direction;

The reciprocating motion of the pressing rod 101 is generally a single degree of freedom, that is, only reciprocating movement. The pressing part 5 can be integrally formed with the pressing rod 101 or can be separately and detachably arranged. In this embodiment, a plate-like structure is used for pressing Generally, a movable connection with the end of the pressing rod with a certain degree of freedom is used, such as a movable head such as a ball twist, so as to adapt to the pressing end face and ensure the coaxiality of the workpiece;

The upper end of the rocker arm is hinged with the fulcrum of the driving lever through the fulcrum hinge shaft 14, and the driving lever rotates around the fulcrum under the action of the external force, so that the resistance arm 1022 tends to be vertical from the lateral direction, thereby driving the pressing rod 101 downward to press the workpiece, so The rocker arm swings forward around the hinge point at the lower end of the rocker arm under the lateral (no displacement) constraint of the pressing rod 101. When the resistance arm 1022 presses the workpiece, the axis of the fulcrum at least intersects with the hinge axis of the fulcrum (the axis of the hinge shaft 14). Or backward beyond the hinge axis, thus forming a self-locking, preventing the lever from rotating under the reaction force, and at the same time, the limit block restricts the lever to continue to rotate in the pressing direction, so as to avoid continuing to rotate and drive the pressing rod upward, forming a self-locking pressing (That is, the mechanical structure composed of the pressing rod and the driving lever is similar to the connecting rod crank structure, but because it is limited by the limit block, the circular motion similar to the connecting rod crank is avoided to form self-locking).

In this embodiment, the pressing assembly 1 further includes a base, the base is fixed on the upper longitudinal beam 6, and the pressing rod 101 is arranged on the base to reciprocate up and down with a single degree of freedom. Two rocker arms are arranged on both sides of the base (rocker arm 1031 and rocker arm 1032) and the lower ends are coaxially hinged on the base, and the upper ends are coaxially hinged on both sides of the fulcrum of the driving lever (that is, with the driving lever at the fulcrum). coaxial rotation); when the pressing rod 101 presses the workpiece through the pressing part, the axis of the pressing rod intersects or exceeds the axis of the fulcrum backward. side against the resistance arm of the drive lever;

As shown in the figure, the base is fixed on the surface of the upper longitudinal beam 6 through a detachable structure, and the upper longitudinal beam 6 is provided with a through hole for the pressing rod to pass through; the base includes a base plate 105 and a guide sleeve 107, which guide the The sleeve has a guide slideway, the guide slideway is vertically arranged facing the via hole on the upper longitudinal beam, and the pressing rod passes through the guide slideway and cooperates with it to reciprocate up and down; base plate 105 It is detachably connected with the upper longitudinal beam 6 through connecting holes (bolts pass through, generally using waist-shaped holes), which has strong adaptability; the guide sleeve 107 is fixed to the base plate 105 by screw connection, and the structure is simple; as shown in the figure As shown in the figure, the lower end of the guide sleeve 107 is machined with an external thread, and is screwed on the internal thread on the base plate 105 in a way that the axis (direction of the guide slide) is perpendicular to the base plate 105 to form a connection. 106 for locking; the pressing rod passes through the guide sleeve 107 in the vertical direction and cooperates with its reciprocating motion (generally a single degree of freedom); The structure is simple and practical, the entire locking assembly forms a module, and the hinged part is completely processed and then installed on the base plate;

In the present invention, backward refers to the direction in which the power arm 1022 swings when the driving lever presses the workpiece (the direction indicated by the arrow in FIG. 4 ), and the back side is the side corresponding to the backward, which will not be repeated here. .

Due to the action of the limit block 14, the resistance wall 1022 of the lever is prevented from continuing to rotate, and the rocker arm 1031 and the rocker arm 1031 cannot continue to rotate under the action of the limit block, that is, an interlock is formed, and the axis of the pressing rod The axis that intersects at or exceeds the fulcrum backward (usually it is sufficient to intersect) forms a stable retraction mechanism to avoid loosening.

In this embodiment, the base is detachably and fixedly connected to the upper longitudinal beam 6 , the driving lever is a right-angle structure bounded by a fulcrum, the resistance arm 1022 forms a fork-shaped groove, and the pressing rod 101 is located in the fork-shaped groove Hinged at the end of the resistance arm, the fork-shaped structure is conducive to stable connection and does not exert biasing force, so that the structure is stable and has a long life cycle; as shown in the figure, the driving lever is a right-angle structure bounded by a fulcrum (that is, the power arm 1021 and the The resistance arm 1022 is at a right angle), that is, at the fulcrum, the power arm is bent forward, which is convenient for operation and does not interfere with the rocker arm (limiting block).

In this embodiment, the workpiece 9 is in close contact with the upper shielding ring 7 and the lower shielding ring 10 to form a radial seal. The radial seal means that a sealing ring is provided on the end surface to prevent liquid from leaking radially.

In this embodiment, the variable diameter compensator 3 can be positioned and installed on the bottom plate 2 and is coaxial with the bottom plate channel 201 , and the inner circle is provided with a step for placing the lower shielding ring 10 , and the inner diameter of the step is larger than that of the lower shielding ring. The inner diameter of 10 ensures the stable flow of the electroplating solution; the upper shielding ring 7 is coaxially placed on the inner circle of the positioning sleeve 8, and the pressing assembly 1 presses the workpiece 9 through the upper shielding ring 7; A variety of mechanical structures can be used for positioning on the bottom plate 2. For example, an annular sink groove is formed on the bottom plate channel 201 (the shape is the same as the radial dimension of the reducing compensator, this embodiment is a circle), and the reducing compensator is placed. In the annular sinking groove, the horizontal positioning can achieve the effect of coaxial, or the reducing compensator as shown in the figure can be matched with the bottom plate channel through the shaft shoulder (step shaft) structure, that is, the small diameter part passes through the bottom plate channel. , the shoulder of the large diameter part is pressed against the edge of the channel of the bottom plate to form positioning;

The parts in direct contact with the workpiece (cylinder) are generally sealed with acid and alkali-resistant fluororubber sealing rings, such as the sealing between the upper and lower shielding rings and the workpiece, to ensure the sealing and at the same time, it can ensure the close contact between the shielding ring and the workpiece cylinder to prevent The burr is successfully transferred; the seal without direct contact with the workpiece is made of EVA foam (such as between the lower shielding ring and the reducing compensator, etc.) Efficiency; as shown in the figure, after the workpiece is installed in the present utility model, the tooling of the present utility model is moved to the electroplating device through the positioning hole 202 to cooperate with the positioning protrusion 1101 on the device 11 to ensure the placement position and the electroplating solution of the device. The flow channel is matched to ensure the normal progress of electroplating.

The electroplating outside the tank of the present invention refers to the dynamic electroplating realized by forming the electroplating liquid circulation outside the electroplating liquid tank, and details are not repeated here.

This embodiment takes an engine cylinder block as an example. In fact, the technical solution claimed in the present invention is not limited to an engine cylinder block, but can also be a cylinder block of a compressor cylinder, a piston pump cylinder block, etc. with similar structures, It is not repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should The technical solutions are modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and all of them should be included in the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a work piece fixing device for cylinder body external bath electroplates which characterized in that: comprises a fixed frame and a pressing component;

the fixing frame comprises a bottom plate and a frame fixed on the bottom plate;

the pressing assembly is used for pressing the workpiece on the bottom plate and locking the workpiece.

2. The workpiece fixture for cylinder block out-of-tank plating according to claim 1, wherein: the frame is provided with a fixed upper longitudinal beam, the pressing assembly is arranged on the upper longitudinal beam, and a pressing part which can be driven to reciprocate up and down is arranged for pressing or releasing a workpiece.

3. The workpiece fixing device for cylinder block out-of-tank plating according to claim 2, characterized in that: the pressing assembly comprises a pressing rod capable of being driven to reciprocate up and down along the upper longitudinal beam and a lever assembly used for driving the pressing rod to reciprocate, and the pressing part is located at the lower end of the pressing rod.

4. A workpiece holding device for use in cylinder block out-of-tank plating as defined in claim 3 wherein: the lever assembly comprises a driving lever and a rocker arm, the resistance end of the lever is rotatably hinged to the upper end of the pressing rod, the lower end of the rocker arm can rotate in a single degree of freedom relative to the upper longitudinal beam, and the upper end of the rocker arm is coaxially hinged to the fulcrum of the driving lever in a single degree of freedom; the rocker arm is provided with a limiting block, and the limiting block limits the lever to continue rotating towards the pressing direction when the pressing rod is driven by the driving lever to press the workpiece, so that locking is realized.

5. A workpiece holding device for use in cylinder block out-of-tank plating as defined in claim 3 wherein: the pressing assembly further comprises a base, the base is fixed on the upper longitudinal beam, the pressing rod can reciprocate up and down in a single degree of freedom and is arranged on the base, the two rocker arms are respectively arranged on two sides of the base, and the lower ends of the two rocker arms are coaxially hinged to the base; when the pressing rod presses the workpiece through the pressing part, the axis of the pressing rod is intersected with or exceeds the axis of the fulcrum backwards, and at the moment, the limiting block supports against the resistance arm of the driving lever from the back side.

6. The workpiece fixture device for cylinder block out-of-tank plating according to claim 5, wherein: the base is detachably and fixedly connected to the upper longitudinal beam, the resistance arm forms a fork-shaped groove, and the pressing rod is located in the fork-shaped groove and hinged to the end portion of the resistance arm.

7. The workpiece fixture device for cylinder block out-of-tank plating according to claim 6, wherein: the pressing part is of a plate-shaped structure and is perpendicular to the pressing rod and fixed at the lower end of the pressing rod.

8. The workpiece fixing device for cylinder block out-of-tank plating according to claim 4, characterized in that: the driving lever is a right-angle structure taking a fulcrum as a boundary.

9. The workpiece fixture device for cylinder block out-of-tank plating according to claim 5, wherein: the base comprises a base plate and a guide sleeve, and a through hole for the compression rod to pass through is formed in the upper longitudinal beam; the guide sleeve is provided with a guide slideway and is fixed on the base plate, the guide slideway is vertically arranged right opposite to the through hole on the upper longitudinal beam, and the pressing rod penetrates through the guide slideway and is matched with the guide slideway in a way of reciprocating up and down; the base plate is detachably and fixedly connected with the upper longitudinal beam; the lower ends of the two rocker arms are symmetrically hinged on two sides of the guide sleeve respectively.

10. A workpiece holding device for use in cylinder block out-of-tank plating as defined in claim 3 wherein: the bottom plate is provided with a positioning hole for positioning and placing the bottom plate in the electroplating device and a functional hole for installing a workpiece.

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