Joint pulling off-line automatic head making device and its operation method

Abstract

The present invention relates to a joint pulling offline automatic head making device, comprising a clamping mechanism and a base located on one side of the clamping mechanism, a bracket connected to the base, the bracket connected to a first driving cylinder, the first driving cylinder being able to drive the bracket to slide horizontally along the base, a piercing mechanism, a head making mechanism, a core head supporting mechanism and an oiling mechanism being fixedly provided on the bracket in sequence, the clamping mechanism being used to clamp the copper tube, the oiling mechanism being used to inject inner mold oil into the copper tube, the piercing mechanism being used to pierce a preset position of the copper tube, the core head supporting mechanism being used to deliver the core head to a designated position and then the core head is delivered into the copper tube by the oiling mechanism, and the head making mechanism being used to make heads of the copper tube. The present invention integrates oiling, piercing, core head delivery and head making, greatly liberates manpower, improves production efficiency and finished product qualification rate, and is of great significance to the full-line automation, unmanned operation and intelligence of copper tube production.

Description

Technical Field

[0001] The invention relates to a head making device, in particular to an offline automatic head making device for linked pulling and an operating method thereof. Background Art

[0002] In the copper tube processing industry, double and triple drawing is an important drawing process. The first step of the joint drawing is to make the head of the copper tube blank, so that the head of the copper tube becomes a solid section, reducing the size of the tube head, increasing the drawing strength of the tube head, and facilitating the starting traction of the tube threading and drawing. Fig.11 As shown, it consists of a bracket 1 and a hydraulic four-cylinder head making device 2. The operator needs to first fill the inner mold oil into the copper tube, then put the head of the copper tube on the bracket, make a hole at its corresponding position, then put the joint pull core head in sequence, and finally send the copper tube into the hydraulic four-cylinder head making device to complete the head making.

[0003] The traditional joint drawing head making machine has the following disadvantages: 1. The operation process is cumbersome, the workload is large, the degree of automation is too low, and the efficiency is low; 2. The operator's professional level, proficiency and working status will affect the quality of the head making. For example, if the pit is too deep, it will cause the tube to break during drawing, and if the pit is too shallow, there will be problems such as empty pulling. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present invention provides a joint pulling offline automatic head making device, which integrates oiling, pitting, core head feeding and head making into one, which greatly liberates manpower, improves production efficiency and finished product qualification rate, and is of great significance to the full-line automation, unmanned and intelligent production of copper tubes.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A joint pulling offline automatic head making device comprises a clamping mechanism and a base located on one side of the clamping mechanism, a bracket is connected to the base, and the bracket is connected to a first driving cylinder. The first driving cylinder can drive the bracket to slide horizontally along the base, and a pitting mechanism, a head making mechanism, a core head supporting mechanism and an oiling mechanism are fixedly arranged on the bracket in sequence, the clamping mechanism is used to clamp the copper tube, the oiling mechanism is used to inject inner mold oil into the copper tube, the pitting mechanism is used to pit the preset position of the copper tube, the core head supporting mechanism is used to transport the core head to the specified position, and then the oiling mechanism will send the core head into the copper tube, and the head making mechanism is used to make heads on the copper tube.

[0007] Preferably, the clamping mechanism includes a first support frame, a support seat, a first hydraulic cylinder, a clamping arm and a side guard. The support seat is fixed on the first support frame, the clamping arm is located on the support seat, and the side guard is fixed on the support seat on both sides of the clamping arm. The first hydraulic cylinder is vertically placed in the first support frame and the first hydraulic cylinder is connected to the clamping arm. The clamping arm can clamp or loosen the copper tube under the drive of the first hydraulic cylinder.

[0008] Preferably, two parallel slide rails are provided on the base, and a plurality of sliders matching with the slide rails are provided below the bracket. The sliders are engaged in the slide rails and can move horizontally along the slide rails.

[0009] Preferably, the pitting mechanism includes a second support frame, a second hydraulic cylinder, a pitting head, a head component and a copper tube support, the second support frame is fixed on the bracket, the copper tube support is fixed on the second support frame, the head component is fixed on one side of the copper tube support, the second hydraulic cylinder is fixed above the copper tube support and the lower end of the second hydraulic cylinder is connected to the pitting head, and the pitting head can move up and down under the drive of the second hydraulic cylinder to pit the copper tube on the copper tube support.

[0010] Preferably, the heading mechanism includes a third support frame, a fixed block, a module, a lining plate, a hydraulic cylinder group and a claw. The third support frame is fixed on the bracket, the fixed block is fixed to the third support frame, four modules are fixed on the fixed block, and an aisle is formed between two adjacent modules. The hydraulic cylinder group can drive the claw to move in the aisle to extrude the copper tube to head.

[0011] Preferably, the hydraulic cylinder group includes four third hydraulic cylinders, two of which are horizontal third hydraulic cylinders and two are vertical third hydraulic cylinders. The piston rod of each third hydraulic cylinder is fixedly connected to a claw push block. The claw push block is located in the aisle and the claw is fixedly connected inside the claw push block. The four claws together form a channel for the copper pipe head. A lining plate is provided between the claw push block and the module.

[0012] Preferably, the core head support mechanism includes a fourth support frame, a V-shaped tray and a second driving cylinder, the fourth support frame is movably connected to the third support frame, the V-shaped tray is fixed on the fourth support frame, and the second driving cylinder is connected to the fourth support frame and can drive the fourth support frame to move up and down.

[0013] Preferably, the oil injection mechanism includes a fifth support frame, an oil injection core rod, a rodless cylinder, a connecting piece and a supporting piece. The fifth support frame is fixed on the bracket. An oil injection core rod is provided above the fifth support frame, and a rodless cylinder is provided below the fifth support frame. The rodless cylinder is connected to the oil injection core rod and can drive the oil injection core rod to run horizontally along the fifth support frame.

[0014] Preferably, the oil injection mechanism further includes a connecting member and a supporting member, the rodless cylinder is fixedly connected to the oil injection core rod via the connecting member, the fifth support frame is fixedly provided with a supporting member at one end close to the core support head mechanism, and the oil injection core rod is slidably inserted into the supporting member.

[0015] The present invention also provides an operating method of a joint-pulling off-line automatic head-making device, the steps of which are as follows:

[0016] Step 1: The operator passes the straight section of the copper tube obtained in the previous process through the clamping arm of the clamping mechanism, and the first hydraulic cylinder drives the clamping arm to clamp the copper tube; the operator passes the copper tube to be headed into the clamping mechanism from one side, and after the copper tube extends a certain length from the other side of the clamping mechanism, the clamping mechanism clamps the copper tube;

[0017] Step 2: The first driving cylinder drives the bracket to move toward the clamping mechanism side. After moving to the working position, the first driving cylinder stops running, and the pitting mechanism, the head making mechanism, the core head supporting mechanism and the oiling mechanism move synchronously. At this time, the copper tube penetrates the pitting mechanism and the head making mechanism;

[0018] Step 3: The rodless cylinder drives the oil injection core rod to move toward the direction of the head making mechanism, and pushes the oil injection core rod into the copper tube, adds a certain amount of inner mold oil into the copper tube, and then the rodless cylinder drives the oil injection core rod to move in the opposite direction to the initial position;

[0019] Step 4: The second hydraulic cylinder in the pitting mechanism drives the pitting head to move downward and punch a pit at the corresponding position of the copper pipe;

[0020] Step 5: The second driving cylinder in the core head supporting mechanism drives the V-shaped tray to move upward until the core head and the oil injection core rod are at the same horizontal plane, and the rodless cylinder drives the oil injection core rod to move toward the core head until the core head is pushed into the copper tube, and the oil injection core rod returns to the initial position again;

[0021] Step 6: The four third hydraulic cylinders in the heading mechanism simultaneously drive the claws to move toward the copper tube, thereby realizing the automatic heading operation of the copper tube.

[0022] The beneficial effects of the present invention are:

[0023] 1) The copper tubes obtained by the L-shaped four-station rolling mill are usually large in size. Currently, the operators have to deliver them to the head-making part, which is very laborious. In the present invention, the clamping mechanism is used to match the slide rail and the cylinder to replace the operator's tube delivery action, thereby reducing the labor intensity of the operator;

[0024] 2) The punching mechanism mainly includes a pull-rod hydraulic cylinder and a punching head. The punching force of the punching head can be flexibly adjusted according to the diameter and wall thickness of the copper tube. The quality of the finished product is stable and the efficiency is high. When making the head, the punching mechanism can also provide a certain supporting pressure on the copper tube to facilitate the head making;

[0025] 3) The oiling core rod in the oiling mechanism takes into account both the functions of pushing the core head and injecting inner mold oil, which simplifies the structure of the device, saves installation space, and the installation position of the whole machine is flexible and convenient. Therefore, the present invention greatly liberates manpower, improves production efficiency and finished product qualification rate, and has important practical value for the full-line automation, unmanned and intelligentization of copper tube production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 A top view of the present invention;

[0028] Figure 3 is a side view of the present invention;

[0029] Figure 4 A perspective view of the present invention;

[0030] Figure 5 A three-dimensional diagram of another viewing angle of the present invention;

[0031] Figure 6 for Figure 5 The enlarged view of point A in the middle;

[0032] Figure 7 is a side sectional view of the present invention;

[0033] Figure 8 It is an exploded view of the head making mechanism in the present invention;

[0034] Fig. 9 It is a side view of the head making mechanism in the present invention;

[0035] Fig.10 It is the internal structure diagram of the head making mechanism in the present invention;

[0036] Fig.11 It is a structural schematic diagram of a head making device in the prior art;

[0037] In the figure: 10-clamping mechanism, 11-first support frame, 12-support seat, 13-first hydraulic cylinder, 14-clamping arm, 15-side guard, 20-base, 21-bracket, 22-slide rail, 23-slider, 24-first driving cylinder, 30-pitting mechanism, 31-second support frame, 32-second hydraulic cylinder, 33-pitting head, 34-head component, 35-copper pipe support, 40-heading mechanism, 41-first Three support frames, 42-third hydraulic cylinder, 43-claw push block, 44-claw, 45-module, 46-lining plate, 47-fixed block, 50-core support head mechanism, 51-fourth support frame, 52-V-type tray, 53-second drive cylinder, 54-slide rod, 55-linear bearing, 60-oil injection mechanism, 61-fifth support frame, 62-oil injection core rod, 63-rodless cylinder, 64-connecting piece, 65-support piece. DETAILED DESCRIPTION

[0038] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0041] Example: Figure 1-10As shown, a joint pulling offline automatic head making device includes a clamping mechanism 10 and a base 20 located on one side of the clamping mechanism, a bracket 21 is connected to the base 20, and the bracket 21 is connected to a first driving cylinder 24. The first driving cylinder can drive the bracket 21 to slide horizontally along the base 20, and a pitting mechanism 30, a head making mechanism 40, a core head supporting mechanism 50 and an oil injection mechanism 60 are fixed on the bracket 21 in sequence. The clamping mechanism 10 is used to clamp the copper tube, and the oil injection mechanism 60 is used to inject inner mold oil into the copper tube. The pitting mechanism 30 is used to pit a preset position of the copper tube, and the core head supporting mechanism 50 is used to transport the core head to a specified position and then the core head is sent into the copper tube by the oil injection mechanism, and the head making mechanism 40 is used to make heads of the copper tube. The present invention mainly comprises a clamping mechanism 10, a piercing mechanism 30, a head making mechanism 40, a core head supporting mechanism 50 and an oiling mechanism 60 which are arranged in sequence, wherein the piercing mechanism 30, the head making mechanism 40, the core head supporting mechanism 50 and the oiling mechanism 60 are slidably connected to the base 20 through a bracket 21, and an operator inserts the copper tube to be headed into the clamping mechanism from one side, and after the copper tube extends out of the other side of the clamping mechanism for a certain length, the clamping mechanism clamps the copper tube, and the first driving cylinder 24 drives the bracket 21 to move toward the clamping mechanism side until the extended copper tube extends into the piercing mechanism 30 and the head making mechanism 40 in sequence, at which time the piercing mechanism and the head making mechanism are in a non-working state, and the first driving cylinder stops running. The oiling mechanism 60 moves toward the heading mechanism and injects the inner mold oil into the copper tube in the heading mechanism, the oiling mechanism returns to its original position, the piercing mechanism 30 moves downward to pierce the copper tube inside it, the core head supporting mechanism 50 moves upward, and makes the core head therein and the copper tube in the heading mechanism at the same horizontal position, the oiling mechanism moves toward the heading mechanism side again and sends the core head in the core head supporting mechanism into the copper tube in the heading mechanism, and finally the heading mechanism 40 completes the heading operation on the copper tube; therefore, the present invention integrates oiling, piercing, core head sending and heading, which greatly liberates manpower, improves production efficiency and finished product qualification rate, and is of great significance to the full-line automation, unmanned and intelligent production of copper tubes.

[0042] The base 20 is provided with two parallel slide rails 22, and a plurality of sliders 23 cooperating with the slide rails are provided below the bracket 21. The sliders 23 are engaged in the slide rails and can move horizontally along the slide rails. The first driving cylinder 24 is placed horizontally, and its piston rod is connected to the bracket 21, so that the bracket can be driven to slide left and right along the slide rails to approach or move away from the clamping mechanism.

[0043] like Figure 4As shown, the clamping mechanism 10 includes a first support frame 11, a support seat 12, a first hydraulic cylinder 13, a clamping arm 14 and a side guard 15. The support seat 12 is fixed on the first support frame 11, the clamping arm 14 is located on the support seat 12, and the side guard 15 is fixed on the support seats on both sides of the clamping arm. The first hydraulic cylinder 13 is vertically placed in the first support frame 11 and the first hydraulic cylinder is connected to the clamping arm 14. The clamping arm 14 can clamp or loosen the copper pipe under the drive of the first hydraulic cylinder. The first hydraulic cylinder 13 is located below the clamping arm 14, and the first hydraulic cylinder drives the clamping arm to move up and down to clamp or loosen the copper pipe.

[0044] like Figure 1 As shown, the piercing mechanism 30 includes a second support frame 31, a second hydraulic cylinder 32, a piercing head 33, a head component 34 and a copper tube support 35. The second support frame 31 is fixed on the bracket 21, the copper tube support 35 is fixed on the second support frame 31, the head component 34 is fixed on one side of the copper tube support 35, the second hydraulic cylinder 32 is fixed on the top of the copper tube support and the lower end of the second hydraulic cylinder is connected to the piercing head 33. The piercing head 33 can move up and down to pierce the copper tube on the copper tube support under the drive of the second hydraulic cylinder. The second hydraulic cylinder 32 is a tie rod type hydraulic cylinder, which is fixed on the copper tube support. The piston rod of the second hydraulic cylinder is connected to the piercing head. The second hydraulic cylinder 32 and the head component 34 are respectively fixed on both sides of the copper tube support 35. The head component 34 is close to the clamping mechanism. The head component has a trumpet-shaped structure, which is convenient for the copper tube to be inserted.

[0045] like Figure 8-10 As shown, the head making mechanism 40 includes a third support frame 41, a fixed block 47, a module 45, a lining plate 46, a hydraulic cylinder group and a claw 44. The third support frame 41 is fixed on the bracket 21, and the fixed block 47 is fixed on the third support frame 41. Four modules 45 are fixed on the fixed block 47. An aisle is formed between two adjacent modules. The hydraulic cylinder group can drive the claw 44 to move in the aisle to extrude and head the copper tube. The hydraulic cylinder group includes four third hydraulic cylinders 42, two of which are horizontal third hydraulic cylinders and two are vertical third hydraulic cylinders. The piston rod of each third hydraulic cylinder 42 is fixedly connected to the claw push block 43. The claw push block 43 is located in the aisle and the claw 44 is fixedly connected to the claw push block 43. The four claws enclose a channel for copper tube head making. A lining plate 46 is provided between the claw push block 43 and the module 45.

[0046] like Figure 5 and Figure 6As shown, the core support mechanism 50 includes a fourth support frame 51, a V-shaped tray 52 and a second driving cylinder 53. The fourth support frame 51 is movably connected to the third support frame 41, the V-shaped tray 52 is fixed to the fourth support frame 51, and the second driving cylinder 53 is connected to the fourth support frame 51 and can drive the fourth support frame to move up and down. Two parallel sliding rods 54 are fixed on one side of the third support frame 41. The fourth support frame 51 is connected to the sliding rod 54 through a linear bearing 55. The second driving cylinder 53 is located below the fourth support frame, and the second driving cylinder drives the fourth support frame to slide up and down along the sliding rod.

[0047] like Figure 5 As shown, the oil injection mechanism 60 includes a fifth support frame 61, an oil injection core rod 62, a rodless cylinder 63, a connecting piece 64 and a supporting piece 65. The fifth support frame 61 is fixed on the bracket 21. The fifth support frame 61 is provided with an oil injection core rod 62 on the top and a rodless cylinder 63 on the bottom. The rodless cylinder 63 is connected to the oil injection core rod 62 and can drive the oil injection core rod 62 to move horizontally along the fifth support frame. The oil injection mechanism 60 also includes a connecting piece 64 and a supporting piece 65. The rodless cylinder 63 is fixedly connected to the oil injection core rod 62 through the connecting piece 64. The fifth support frame 61 is fixedly provided with a supporting piece 65 at one end close to the core support head mechanism 50. The oil injection core rod 62 is slidably inserted into the supporting piece 65. The fifth support frame 61 is provided with a horizontal strip plate, and the oiling core rod 62 is located above the strip plate and arranged parallel to the strip plate. One end of the oiling core rod is fixedly connected to the connecting piece 64, and the other end passes through the supporting piece 65 and is close to the heading mechanism. The rodless cylinder 63 drives the oiling core rod to move in the left and right directions and enter or move away from the copper tube in the heading mechanism. The supporting piece 65 provides supporting force to the oiling core rod.

[0048] The operation process of the present invention: the steps are as follows:

[0049] Step 1: The operator passes the straight section of the copper tube obtained in the previous process through the clamping arm 14 of the clamping mechanism 10, and the first hydraulic cylinder 13 drives the clamping arm to clamp the copper tube; the operator passes the copper tube to be headed into the clamping mechanism from one side, and after the copper tube extends a certain length from the other side of the clamping mechanism, the clamping mechanism clamps the copper tube;

[0050] Step 2: The first driving cylinder 24 drives the bracket 21 to move toward the clamping mechanism side. After moving to the working position, the first driving cylinder stops running, and the pitting mechanism 30, the head making mechanism 40, the core supporting head mechanism 50 and the oiling mechanism 60 move synchronously. At this time, the copper tube penetrates the pitting mechanism 30 and the head making mechanism 40;

[0051] Step 3: The rodless cylinder 63 drives the oil injection core rod 62 to move toward the head making mechanism, and pushes the oil injection core rod into the copper tube, adds a certain amount of inner mold oil into the copper tube, and then the rodless cylinder drives the oil injection core rod 62 to move in the opposite direction to the initial position;

[0052] Step 4: The second hydraulic cylinder 32 in the pit-making mechanism 30 drives the pit-making head to move downward and make a pit at a corresponding position of the copper pipe;

[0053] Step 5: The second driving cylinder 53 in the core head supporting mechanism drives the V-shaped tray 52 to move upward until the core head therein and the oiling core rod 62 are at the same horizontal plane, and the rodless cylinder 63 drives the oiling core rod to move toward the core head until the core head is pushed into the copper tube, and the oiling core rod returns to the initial position again;

[0054] Step 6: The four third hydraulic cylinders 42 in the header mechanism 40 simultaneously drive the clamping claws 44 to move toward the copper tube, thereby realizing the automatic header operation of the copper tube.

[0055] It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these modifications and improvements all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A joint pull offline automatic head making device, characterized by: The invention comprises a clamping mechanism (10) and a base (20) located on one side of the clamping mechanism, wherein a bracket (21) is connected to the base (20), and the bracket (21) is connected to a first driving cylinder (24). The first driving cylinder can drive the bracket (21) to slide horizontally along the base (20), and a piercing mechanism (30), a head making mechanism (40), a core head supporting mechanism (50) and an oil injection mechanism (60) are fixedly arranged on the bracket (21) in sequence, wherein the clamping mechanism (10) is used to clamp the copper tube, the oil injection mechanism (60) is used to inject inner mold oil into the copper tube, the piercing mechanism (30) is used to pierce a preset position of the copper tube, the core head supporting mechanism (50) is used to transport the core head to a specified position, and then the core head is sent into the copper tube by the oil injection mechanism, and the head making mechanism (40) is used to perform head making on the copper tube; The base (20) is provided with two parallel slide rails (22), and a plurality of slide blocks (23) matching with the slide rails are provided below the bracket (21), and the slide blocks (23) are engaged in the slide rails and can move horizontally along the slide rails; The piercing mechanism (30) comprises a second support frame (31), a second hydraulic cylinder (32), a piercing head (33), a head component (34) and a copper tube support (35); the second support frame (31) is fixed on the bracket (21); the copper tube support (35) is fixed on the second support frame (31); the head component (34) is fixed on one side of the copper tube support (35); the second hydraulic cylinder (32) is fixed above the copper tube support and the lower end of the second hydraulic cylinder is connected to the piercing head (33); the piercing head (33) can move up and down under the drive of the second hydraulic cylinder to pierce the copper tube on the copper tube support; The clamping mechanism (10) comprises a first support frame (11), a support seat (12), a first hydraulic cylinder (13), a clamping arm (14) and a side guard (15); the support seat (12) is fixed on the first support frame (11); the clamping arm (14) is located on the support seat (12); the side guard (15) is fixed on the support seats on both sides of the clamping arm; the first hydraulic cylinder (13) is vertically arranged in the first support frame (11) and is connected to the clamping arm (14); the clamping arm (14) can clamp or loosen the copper pipe under the drive of the first hydraulic cylinder; The head making mechanism (40) comprises a third support frame (41), a fixed block (47), a module (45), a lining plate (46), a hydraulic cylinder group and a clamping claw (44); the third support frame (41) is fixed on the bracket (21); the fixed block (47) is fixed on the third support frame (41); four modules (45) are fixed on the fixed block (47); an aisle is formed between two adjacent modules; the hydraulic cylinder group can drive the clamping claw (44) to move in the aisle to extrude and make heads on the copper tube; The core support head mechanism (50) comprises a fourth support frame (51), a V-shaped tray (52) and a second driving cylinder (53); the fourth support frame (51) is movably connected to the third support frame (41); the V-shaped tray (52) is fixed to the fourth support frame (51); and the second driving cylinder (53) is connected to the fourth support frame (51) and can drive the fourth support frame to move up and down.

2. The offline automatic head-making device for continuous pulling according to claim 1 is characterized in that: The hydraulic cylinder group comprises four third hydraulic cylinders (42), two of which are horizontal third hydraulic cylinders and two are vertical third hydraulic cylinders. The piston rod of each third hydraulic cylinder (42) is fixedly connected to a clamping claw push block (43). The clamping claw push block (43) is located in the passageway and a clamping claw (44) is fixedly connected to the clamping claw push block (43). The four clamping claws enclose a passage for the copper pipe head. A lining plate (46) is provided between the clamping claw push block (43) and the module (45).

3. The offline automatic head-making device for continuous pulling according to claim 2 is characterized in that: The oil injection mechanism (60) comprises a fifth support frame (61), an oil injection core rod (62), a rodless cylinder (63), a connecting piece (64) and a supporting piece (65); the fifth support frame (61) is fixed on the bracket (21); an oil injection core rod (62) is provided above the fifth support frame (61); and a rodless cylinder (63) is provided below the fifth support frame; the rodless cylinder (63) is connected to the oil injection core rod (62) and can drive the oil injection core rod (62) to move in a horizontal direction along the fifth support frame.

4. The offline automatic head-making device for continuous pulling according to claim 3 is characterized in that: The oil injection mechanism (60) further comprises a connecting member (64) and a supporting member (65); the rodless cylinder (63) is fixedly connected to the oil injection core rod (62) via the connecting member (64); the supporting member (65) is fixedly provided at one end of the fifth support frame (61) close to the core support head mechanism (50); and the oil injection core rod (62) is slidably inserted into the supporting member (65).

5. An operating method of the offline automatic head-making device for continuous pulling according to claim 4, characterized in that: Here are the steps: Step 1: The operator passes the straight section of the copper tube obtained in the previous process through the clamping arm (14) of the clamping mechanism (10), and the first hydraulic cylinder (13) drives the clamping arm to clamp the copper tube; Step 2: The first driving cylinder (24) drives the bracket (21) to move toward the clamping mechanism side. After moving to the working position, the first driving cylinder stops running, and the pitting mechanism (30), the head making mechanism (40), the core head supporting mechanism (50) and the oil injection mechanism (60) move synchronously. At this time, the copper tube penetrates the pitting mechanism (30) and the head making mechanism (40); Step 3: The rodless cylinder (63) drives the oil injection core rod (62) to move toward the head making mechanism, and pushes the oil injection core rod into the copper tube, adds a certain amount of inner mold oil into the copper tube, and then the rodless cylinder drives the oil injection core rod (62) to move in the opposite direction to the initial position; Step 4: The second hydraulic cylinder (32) in the hole-making mechanism (30) drives the hole-making head to move downward and make a hole at a corresponding position of the copper tube; Step 5: The second driving cylinder (53) in the core head supporting mechanism drives the V-shaped tray (52) to move upward until the core head and the oil injection core rod (62) therein are at the same horizontal plane, and the rodless cylinder (63) drives the oil injection core rod to move toward the core head until the core head is pushed into the copper tube, and the oil injection core rod returns to the initial position again; Step 6: The four third hydraulic cylinders (42) in the header making mechanism (40) simultaneously drive the clamping claws (44) to move toward the copper tube, thereby realizing the automatic header making operation of the copper tube.

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