Vibration friction welding machine for machining engine valve chamber cover

Abstract

The utility model relates to a vibration friction welding machine for machining an engine valve chamber cover, which comprises a machining table, a vibration head, a pressurizing cylinder, a first-stage forward moving seat, a second-stage forward moving seat and a locking device, the first-stage forward moving seat is positioned above the machining table, and the machining table is provided with a first-stage forward moving mechanism for driving the first-stage forward moving seat to move back and forth; the second-stage forward moving seat is located above the first-stage forward moving seat, the first-stage forward moving seat is provided with a second-stage forward moving mechanism for driving the second-stage forward moving seat to move front and back, a lower tool is arranged on the upper end face of the second-stage forward moving seat, and the lower tool is located in front of the operation window after the first-stage forward moving seat and the second-stage forward moving seat move forwards; the lower tool is located under the upper tool after the first-stage forward moving base and the second-stage forward moving base move backwards, and the locking device locks the position of the second-stage forward moving base when the vibration head conducts vibration friction welding. By the adoption of the scheme, the vibration friction welding machine for machining the engine valve chamber cover improves production efficiency and safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile processing equipment, concretely relates to a vibration friction welding machine for processing engine valve chamber cover. BACKGROUND

[0002] The engine valve chamber cover is a shield installed on the top of the engine cylinder cover, usually made of metal or plastic. It is combined with the cylinder cover through a sealing gasket, and the core function is to close and protect the valve, camshaft and other valve train mechanisms below, prevent oil leakage, and isolate dust and impurities. The oil filler and vent valve interface are usually provided on it, and it is a key component of the upper part of the engine.

[0003] The engine valve chamber cover includes upper and lower parts, and the upper and lower parts are usually fixed by a vibration friction welding machine. The existing vibration friction welding machine includes a processing table, a vibration head located above the processing table and a pressurizing cylinder driving the vibration head to move up and down. A lower tooling is arranged above the processing table, and an upper tooling is arranged below the vibration head. During processing, the upper and lower parts of the valve chamber cover are assembled on the lower tooling in sequence, then the vibration head is lowered, the upper tooling applies pressure to the upper part and generates vibration, and the pressure is maintained until the upper and lower parts are completely fixed after melting. Because a certain noise is generated during vibration friction welding, a soundproof cover is arranged outside the vibration friction welding machine. An operating window for taking and placing the valve chamber cover is arranged in front of the soundproof cover. When vibration friction welding is performed, the operating window is closed by an automatic soundproof door to ensure soundproof effect.

[0004] The vibration friction welding machine with the above structure has certain drawbacks. When the staff assembles the upper and lower parts of the valve chamber cover on the lower tooling in sequence, the operation and vision are hindered by the upper tooling and the soundproof cover, resulting in reduced assembly efficiency. In order to determine the assembly accuracy, it is necessary to check multiple times for a certain period of time, which reduces the production efficiency. In addition, although the vibration friction welding machine is equipped with an induction system to prevent injury to the operator, the hands of the staff are located between the upper tooling and the lower tooling when taking and placing the valve chamber cover, which still has certain safety hazards. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model aims to provide a vibration friction welding machine for processing engine valve chamber cover with improved production efficiency and safety.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: including processing platform, vibration head located above processing platform and pressurizing cylinder of driving vibration head up and down movement, vibration head below be provided with upper tooling, processing platform, vibration head and pressurizing cylinder outside cover be equipped with soundproof cover, soundproof cover front be provided with operation window and automatic soundproof door of switch operation window, still include first forward seat, second forward seat and locking device, first forward seat be located above processing platform, processing platform be provided with first forward mechanism of driving first forward seat forward and backward movement, second forward seat be located above first forward seat, first forward seat be provided with second forward mechanism of driving second forward seat forward and backward movement, second forward seat upper end surface be provided with lower tooling, lower tooling be located operation window front after first forward seat and second forward seat forward movement, lower tooling be located upper tooling directly below after first forward seat and second forward seat backward movement, locking device lock second forward seat position when vibration friction welding of vibration head.

[0007] By adopting the above technical scheme, after the vibration friction welding is completed, the operation window is opened, the first forward seat is driven to move forward by the first forward mechanism, and the second forward seat is driven to move forward by the second forward mechanism, so that the lower tooling is located in front of the operation window, the staff removes the finished product of the valve chamber cover, assembles the upper and lower parts of the valve chamber cover, and after assembly and inspection are completed, the equipment is started, the first forward seat is driven to move backward by the first forward mechanism, and the second forward seat is driven to move backward by the second forward mechanism, so that the lower tooling returns to the directly below the upper tooling, and the soundproof door is closed, and the vibration friction welding can be started. The above-mentioned equipment has the following advantages: ①The position of taking and placing the valve chamber cover is transferred from inside the equipment to outside the equipment, the operation space is large, the vision is good, the assembly efficiency and the inspection efficiency are greatly improved, the production efficiency is increased, at the same time, compared with the space between the upper tooling and the lower tooling outside the equipment, the possibility of pinching the operator is eliminated, and the safety is greatly improved; ②The first forward seat and the second forward seat are combined, the forward movement range of the lower tooling is greatly expanded, and the lower tooling can be stably kept after moving forward; ③Since the second forward seat has the movement function, in order to ensure the stability during the vibration friction welding process and ensure the quality of the finished product, the locking device is additionally provided, and the position is locked during the vibration friction welding process.

[0008] The utility model further sets up: the first level front moving mechanism includes setting in the first level track seat of processing table upper end surface, the first level front moving seat is along the upper end surface of first level track seat and slips in front and back direction, the first level front moving seat left and right sides are provided with the first level guide strip of slipping in the left and right side wall of first level track seat, the first level track seat upper end surface is provided with the first level guide cavity, the first level guide cavity is provided with the first level front moving motor and the first level front and back slide rail of being located first level front moving motor left and right sides, the first level front moving seat lower end surface is provided with the first level drive block and the first level front and back slide base of being located first level drive block left and right sides and with same side first level front and back slide rail slip cooperation, the first level front moving motor front is provided with the first level drive screw rod of passing through first level drive block and with first level drive block screw cooperation along front and back direction drive setting.

[0009] By adopting the above technical scheme, the inverted U-shaped structure formed by the first level front moving seat and the first level guide strips on the two sides cooperates with the profile of the first level track seat to form a primary guide structure, and the first level front and back slide rails cooperate with the first level front and back slide bases to form a secondary guide structure, thereby effectively ensuring the front moving stability of the lower tooling.

[0010] The utility model further sets up: the second level front moving mechanism includes setting in the second level track seat of first level front moving seat upper end surface, the second level front moving seat is along the upper end surface of second level track seat and slips in front and back direction, the second level front moving seat left and right sides are provided with the second level guide strip of slipping in the left and right side wall of second level track seat, the second level track seat upper end surface is provided with the second level guide cavity, the second level guide cavity is provided with the second level front moving motor and the second level front and back slide rail of being located second level front moving motor left and right sides, the second level front moving seat lower end surface is provided with the second level drive block and the second level front and back slide base of being located second level drive block left and right sides and with same side second level front and back slide rail slip cooperation, the second level front moving motor front is provided with the second level drive screw rod of passing through second level drive block and with second level drive block screw cooperation along front and back direction drive setting.

[0011] By adopting the above technical scheme, the inverted U-shaped structure formed by the first level front moving seat and the first level guide strips on the two sides cooperates with the profile of the first level track seat to form a primary guide structure, and the first level front and back slide rails cooperate with the first level front and back slide bases to form a secondary guide structure, thereby effectively ensuring the front moving stability of the lower tooling.

[0012] The utility model further sets up: the operation window lower direction is provided with the extension platform to the front extension, the first level guide strip and extension platform upper end surface front and back slip cooperation.

[0013] By adopting the technical scheme, the window sill part of the operation window is reasonably utilized, the extension platform extending forward in the direction is additionally arranged, and the extension platform is used as an auxiliary support structure for the first forward moving seat to move forward, thereby further increasing the forward moving stability.

[0014] The utility model further sets up: pressure cylinder drive setting has for fixing vibration head's pressure seat, the locking device includes locking lever and locking hole, locking lever is along the up and down direction setting in pressure seat lower end face and presents rectangular arrangement, locking hole is along the up and down direction and is set in two stage forward moving seat and with locking lever one to one correspondence, locking lever includes at the top small diameter section and at the bottom and with locking hole diameter identical big diameter section, small diameter section is along the up and down direction slip setting and the locking ring of the outer diameter of big diameter section is greater, the small diameter section sets up locking spring that compresses between pressure seat and locking ring, the diameter difference of small diameter section and big diameter section connection forms the limiting step of limiting locking ring and moves down.

[0015] By adopting the technical scheme, when the upper tool moves down, the big diameter section enters the locking hole, and the front and rear and left and right positions of the two stage forward moving seat are locked, then the locking ring abuts against the upper end face of the two stage forward moving seat, the locking ring is slightly moved up to compress the locking spring, and the up and down positions of the two stage forward moving seat are locked, so that the processing effect of the vibration friction welding is ensured, the up and down movement of the pressure seat is reasonably utilized, the driving source is reduced, and the equipment structure is more simple.

[0016] The utility model further sets up: the big diameter section lower end sets up the guide chamfer of guiding big diameter section and entering locking hole.

[0017] By adopting the technical scheme, the guide chamfer is additionally arranged, the big diameter section is smoothly inserted into the locking hole, the position of the two stage forward moving seat can be slightly corrected, and the practicability of the equipment is ensured.

[0018] The utility model further sets up: two stage forward moving seat setting has electric push rod, electric push rod upper side along the up and down direction drive setting has through the lower tool and separates the telescopic shaft of valve chamber cover and lower tool upper end face.

[0019] By adopting the technical scheme, since the valve chamber cover can be kept in pressure for a certain time when the vibration friction welding is carried out, the lower tool is relatively closely matched, the electric push rod is additionally arranged, the telescopic shaft is driven by the electric push rod to separate the valve chamber cover from the upper end face of the lower tool, rapid material removal is realized, and the production efficiency is further increased. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 For the working state of the embodiment of the utility model Figure 1 ;

[0021] Figure 2The working state of the specific embodiment of the utility model Figure 2 ;

[0022] Figure 3 The working state of the specific embodiment of the utility model Figure 3 ;

[0023] Figure 4 The internal structure diagram of the specific embodiment of the utility model

[0024] Figure 5 The top view perspective diagram of the processing table

[0025] Figure 6 The bottom view perspective diagram of the first forward moving seat

[0026] Figure 7 The top view perspective diagram of the first forward moving seat

[0027] Figure 8 The bottom view perspective diagram of the second forward moving seat

[0028] Figure 9 The bottom view perspective diagram of the pressurizing seat Specific embodiment

[0029] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0030] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "vertical", "horizontal", "vertical" is the orientation or position relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0031] As Figure 1 — Figure 9The utility model discloses a vibration friction welding machine for processing engine valve chamber cover, including processing table 1, the vibration head 2 of being located above processing table 1 and the pressurizing cylinder 3 of driving vibration head 2 up and down movement, vibration head 2 below is provided with upper tooling 5, and the lower tooling 4 upper end surface and upper tooling 5 lower end surface all have with the spacing contour of valve chamber cover shape adaptation, in the drawing for simple drawing, do not affect the structure understanding, the outside cover of processing table 1, vibration head 2 and pressurizing cylinder 3 is provided with soundproof cover 6, and the operating window 61 of soundproof cover 6 front is provided with automatic soundproof door 62 of switch operating window 61, and the automatic lifting structure of automatic soundproof door 62 is prior art structure, and detailed description is not carried out, and do not affect the structure understanding, still including primary forward seat 7, secondary forward seat 8 and locking device, primary forward seat 7 is located above processing table 1, and processing table 1 is provided with primary forward mechanism of driving primary forward seat 7 forward and backward movement, and secondary forward seat 8 is located above primary forward seat 7, and primary forward seat 7 is provided with secondary forward mechanism of driving secondary forward seat 8 forward and backward movement, and the lower tooling 4 of secondary forward seat 8 upper end surface is provided with, and the lower tooling 4 is located operating window 61 front after primary forward seat 7 and secondary forward seat 8 forward movement, and the lower tooling 4 is located the just below of upper tooling 5 after primary forward seat 7 and secondary forward seat 8 backward movement, and locking device locks secondary forward seat 8 position when vibration head 2 carries out vibration friction welding, and after vibration friction welding is completed (as shown in Figure 1 ), operating window 61 opens (as shown in Figure 2 ), and primary forward seat 7 is driven by primary forward mechanism and moves forward, and secondary forward seat 8 is driven by secondary forward mechanism and moves forward at the same time, so that the lower tooling 4 is located operating window 61 front (as shown in Figure 3 ), and after the staff takes away the finished product of valve chamber cover, assembles the upper and lower parts of valve chamber cover, after assembling and checking are completed, start the equipment, primary forward seat 7 is driven by primary forward mechanism and moves backward, and secondary forward seat 8 is driven by secondary forward mechanism and moves backward at the same time, so that the lower tooling 4 returns to the just below of upper tooling 5 (as shown in Figure 2 ), and automatic soundproof door 62 can be closed and vibration friction welding can be started (as shown in Figure 1 ). The above-mentioned equipment has the following advantages: ① the position of taking and placing the valve chamber cover is transferred from inside the equipment to outside the equipment, the operation space is large, the vision is good, the assembly efficiency and the inspection efficiency are greatly improved, the production efficiency is increased, at the same time, compared with the upper and lower tooling 4 outside the equipment, the possibility of pinching the operator is eliminated, and the safety is greatly improved; ② the primary forward seat 7 and the secondary forward seat 8 are combined, the forward movement range of the lower tooling 4 is greatly expanded, and the lower tooling 4 can be stably kept after moving forward; ③ because the secondary forward seat 8 has the movement function, in order to ensure the stability during the vibration friction welding process and ensure the product quality, the locking device is additionally arranged, and the position is locked during the vibration friction welding process.

[0032] The first forward moving mechanism comprises a first track base 11 arranged on the upper end face of the machining table 1, a first forward moving base 7 sliding on the upper end face of the first track base 11 in the front-rear direction, first guide strips 71 arranged on the left and right sides of the first forward moving base 7 and sliding on the left and right side walls of the first track base 11, a first guide cavity 12 arranged on the upper end face of the first track base 11, a first forward moving motor 13 and first front-rear sliding rails 14 arranged on the left and right sides of the first forward moving motor 13, a first driving block 72 arranged on the lower end face of the first forward moving base 7 and first front-rear sliding bases 73 arranged on the left and right sides of the first driving block 72 and slidingly matched with the same side first front-rear sliding rails 14, a first driving lead screw 15 arranged in front of the first forward moving motor 13 in the front-rear direction, penetrating through the first driving block 72 and threadedly matched with the first driving block 72, and a first inverted U-shaped structure formed by the first forward moving base 7 matched with the first guide strips 71 on the left and right sides, a one-fold guide structure formed by the first track base 11 matched with the first inverted U-shaped structure, and a two-fold guide structure formed by the first front-rear sliding rails 14 matched with the first front-rear sliding bases 73, which effectively ensure the forward moving stability of the lower tooling 4; the first driving lead screw 15 driven by the first forward moving motor 13 and threadedly matched with the first driving block 72 controls the moving position of the first forward moving base 7, so that the equipment action is more accurate, and the first forward moving motor 13 is preferably a servo motor.

[0033] The second forward moving mechanism comprises a second track base 74 arranged on the upper end face of the first forward moving base 7, a second forward moving base 8 sliding on the upper end face of the second track base 74 in the front-rear direction, second guide strips 81 arranged on the left and right sides of the second forward moving base 8 and sliding on the left and right side walls of the second track base 74, a second guide cavity 75 arranged on the upper end face of the second track base 74, a second forward moving motor 76 and second front-rear sliding rails 77 arranged on the left and right sides of the second forward moving motor 76, a second driving block 82 arranged on the lower end face of the second forward moving base 8 and second front-rear sliding bases 83 arranged on the left and right sides of the second driving block 82 and slidingly matched with the same side second front-rear sliding rails 77, a second driving lead screw 78 arranged in front of the second forward moving motor 76 in the front-rear direction, penetrating through the second driving block 82 and threadedly matched with the second driving block 82, a first inverted U-shaped structure formed by the second forward moving base 8 matched with the second guide strips 81 on the left and right sides, a one-fold guide structure formed by the second track base 74 matched with the first inverted U-shaped structure, and a two-fold guide structure formed by the second front-rear sliding rails 77 matched with the second front-rear sliding bases 83, which effectively ensure the forward moving stability of the lower tooling 4; the second driving lead screw 78 driven by the second forward moving motor 76 and threadedly matched with the second driving block 82 controls the moving position of the second forward moving base 8, so that the equipment action is more accurate, and the second forward moving motor 76 is preferably a servo motor.

[0034] The operation window 61 is provided with an extension platform 63 extending forward, and the first guide strip 71 is slidably arranged on the upper end surface of the extension platform 63. The window sill part of the operation window 61 is reasonably utilized, the extension platform 63 extending forward is additionally provided, and the extension platform 63 is used as an auxiliary support structure for the forward movement of the first forward movement seat 7, so that the forward movement stability is further improved.

[0035] The pressing cylinder 3 is provided with a pressing seat 31 for fixing the vibration head 2. The locking device includes locking rods 32 and locking holes 84. The locking rods 32 are arranged on the lower end surface of the pressing seat 31 in the up-down direction and are arranged in a rectangular array. The locking holes 84 are arranged in the second forward movement seat 8 in the up-down direction and correspond to the locking rods 32. The locking rod 32 includes a small-diameter section 321 located at the upper part and a large-diameter section 322 located at the lower part and having a diameter consistent with the locking hole 84. The small-diameter section 321 is slidably arranged in the up-down direction and is provided with a locking ring 323 having an outer diameter larger than that of the large-diameter section 322. The small-diameter section 321 is provided with a locking spring 324 compressed between the pressing seat 31 and the locking ring 323. The diameter difference between the small-diameter section 321 and the large-diameter section 322 forms a limiting step 326 limiting the downward movement of the locking ring 323. When the upper tool 5 moves downward, the large-diameter section 322 enters the locking hole 84, and the front and rear and left and right positions of the second forward movement seat 8 are locked. Then, the locking ring 323 abuts against the upper end surface of the second forward movement seat 8, so that the locking ring 323 slightly moves upward and compresses the locking spring 324, and the upward and downward positions of the second forward movement seat 8 are locked. Thus, the processing effect of the vibration friction welding is ensured, the upward and downward movement of the pressing seat 31 is reasonably utilized, the driving source is reduced, and the equipment structure is more simplified.

[0036] The lower end of the large-diameter section 322 is provided with a guide chamfer 325 guiding the large-diameter section 322 to enter the locking hole 84. The guide chamfer 325 is additionally provided, so that the large-diameter section 322 is smoothly inserted into the locking hole 84 and the position of the second forward movement seat 8 is slightly corrected, and the practicability of the equipment is ensured.

[0037] The second forward movement seat 8 is provided with an electric push rod 85. The electric push rod 85 is provided with an extension shaft 851 penetrating the lower tool 4 and separating the valve cover from the upper end surface of the lower tool 4 in the up-down direction. Since the valve cover is pressed against the lower tool 4 for a certain time during the vibration friction welding, the valve cover is closely combined with the lower tool 4. Therefore, the electric push rod 85 is additionally provided, the extension shaft 851 is driven by the electric push rod 85 to separate the valve cover from the upper end surface of the lower tool 4, the material is quickly removed, the production efficiency is further improved, and in addition, the electric push rod 85 can select appropriate points and quantities according to the structure of the valve cover.

[0038] In addition, the processing table 1 is provided with a control box 16 below. The control box 16 is provided with a controller controlling the cooperative work of each electric control component.

Claims

1. A vibration friction welding machine for processing engine valve cover, comprising a processing table, a vibrating head located above the processing table, and a pressure cylinder for driving the vibrating head to move up and down, wherein an upper tooling is provided below the vibrating head, and a soundproof cover is provided outside the processing table, the vibrating head, and the pressure cylinder, and an operation window and an automatic soundproof door for opening and closing the operation window are provided in front of the soundproof cover, characterized in that: The device further comprises a first forward moving seat, a second forward moving seat and a locking device, the first forward moving seat is located above a processing table, the processing table is provided with a first forward moving mechanism for driving the first forward moving seat to move forward and backward, the second forward moving seat is located above the first forward moving seat, the first forward moving seat is provided with a second forward moving mechanism for driving the second forward moving seat to move forward and backward, the upper end surface of the second forward moving seat is provided with a lower tooling, the lower tooling is located in front of an operation window after the first forward moving seat and the second forward moving seat move forward, the lower tooling is located directly below an upper tooling after the first forward moving seat and the second forward moving seat move backward, and the locking device locks the position of the second forward moving seat when the vibration head performs vibration friction welding.

2. A vibratory friction welder for machining an engine valve cover as defined in claim 1, characterized in that: The first forward moving mechanism comprises a first track seat arranged on the upper end surface of the processing table, the first forward moving seat slides on the upper end surface of the first track seat in the front-rear direction, the left and right sides of the first forward moving seat are respectively provided with first guide strips which slide on the left and right side walls of the first track seat, the upper end surface of the first track seat is provided with a first guide cavity, the first guide cavity is provided with a first forward moving motor and first front-rear sliding rails located on the left and right sides of the first forward moving motor, the lower end surface of the first forward moving seat is provided with a first driving block and first front-rear sliding seats located on the left and right sides of the first driving block and in sliding cooperation with the same side first front-rear sliding rails, and the front of the first forward moving motor is provided with a first driving screw rod which penetrates through the first driving block and is in threaded cooperation with the first driving block.

3. A vibratory friction welder for machining an engine valve cover as defined in claim 2, characterized in that: The second forward moving mechanism comprises a second track seat arranged on the upper end surface of the first forward moving seat, the second forward moving seat slides on the upper end surface of the second track seat in the front-rear direction, the left and right sides of the second forward moving seat are respectively provided with second guide strips which slide on the left and right side walls of the second track seat, the upper end surface of the second track seat is provided with a second guide cavity, the second guide cavity is provided with a second forward moving motor and second front-rear sliding rails located on the left and right sides of the second forward moving motor, the lower end surface of the second forward moving seat is provided with a second driving block and second front-rear sliding seats located on the left and right sides of the second driving block and in sliding cooperation with the same side second front-rear sliding rails, and the front of the second forward moving motor is provided with a second driving screw rod which penetrates through the second driving block and is in threaded cooperation with the second driving block.

4. The vibratory friction welder for machining an engine valve cover of claim 2, wherein: The operation window is provided with an extension platform extending forward in the downward direction, and the first guide strips are in front-rear sliding cooperation with the upper end surface of the extension platform.

5. The vibratory friction welder for machining an engine valve cover of claim 1, wherein: The pressurizing cylinder is provided with a pressurizing seat for fixing the vibration head, the locking device comprises locking rods and locking holes, the locking rods are arranged on the lower end surface of the pressurizing seat in the upward-downward direction and are arranged in a rectangular array, the locking holes are arranged in the second forward moving seat in the upward-downward direction and correspond to the locking rods one by one, the locking rods comprise small-diameter sections located above and large-diameter sections located below and consistent in diameter with the locking holes, the small-diameter sections are provided with locking rings with an outer diameter larger than that of the large-diameter sections in the upward-downward direction, the small-diameter sections are provided with locking springs compressed between the pressurizing seat and the locking rings, and the diameter difference at the connection between the small-diameter sections and the large-diameter sections forms a limiting step for limiting the downward movement of the locking rings.

6. The vibratory friction welder for machining an engine valve cover as defined in claim 5, characterized in that: The lower end of the large-diameter section is provided with a guide chamfer for guiding the large-diameter section into the locking hole.

7. The vibratory friction welder for machining an engine valve cover of claim 1, wherein: The secondary forward-moving seat is provided with an electric push rod, and a telescopic shaft penetrating through the lower tool and separating the valve chamber cover from the upper end surface of the lower tool is driven in the up-down direction above the electric push rod.

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