Automatic ruling machine and ruling method for welding oil cylinder accessories

Abstract

The invention relates to the technical field of machine manufacturing and automation, in particular to an automatic ruling machine for welding oil cylinder accessories and a ruling method. The automatic ruling machine comprises a rack, a clamp used for being connected with an oil cylinder and driving the oil cylinder to rotate, a ruling device used for ruling on the outer wall of the oil cylinder and a control device; the clamp and the scribing device are connected with the rack; the clamp comprises a clamp driving device, and the clamp driving device is used for driving the clamp to clamp the oil cylinder and driving the oil cylinder to rotate; the lineation device is located above the oil cylinder and comprises a cutter and a lineation driving device, and the lineation driving device is used for driving the cutter to move horizontally and vertically; the control device is connected with the clamp driving device and the lineation driving device so that the cutter can complete circumferential and axial lineation on the outer wall of the oil cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical manufacturing and automation, and particularly to an automatic scribing machine and a scribing method for welding oil cylinder accessories. Background Art

[0002] During the welding process of accessories such as oil cylinder joints and lifting rings, scribing operation is an essential part. When welding oil cylinder joints and other accessories, it is necessary to position the welding position through scribing. The existing scribing and positioning work mainly relies on manual measurement to scribe the welding position. This scribing method has the following disadvantages: The scribing and positioning of each joint and accessory need to be manually operated separately, with low scribing efficiency, long time consumption, high manual labor intensity, and high skill requirements for operators. Affected by human factors, the scribing position is prone to errors, resulting in poor scribing accuracy.

[0003] Therefore, there is an urgent need for an automatic scribing machine for welding oil cylinder accessories, which can improve the scribing accuracy and efficiency of welding oil cylinder accessories and reduce the labor intensity. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the above-mentioned disadvantages and deficiencies of the prior art, the present invention provides an automatic scribing machine and a scribing method for welding oil cylinder accessories, which solve the technical problem of poor accuracy of existing manual scribing.

[0006] (II) Technical Solutions

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] An automatic scribing machine for welding oil cylinder accessories includes: a frame, a fixture for connecting an oil cylinder and driving the oil cylinder to rotate, a scribing device for scribing on the outer wall of the oil cylinder, and a control device;

[0009] The fixture and the scribing device are connected to the frame;

[0010] The fixture includes a fixture driving device, which is used to drive the fixture to clamp the oil cylinder and drive the oil cylinder to rotate;

[0011] The scribing device is located above the oil cylinder. The scribing device includes a tool and a scribing driving device, and the scribing driving device is used to drive the tool to move horizontally and vertically;

[0012] The control device is connected to the fixture driving device and the scribing driving device, so that the tool completes circumferential and axial scribing on the outer wall of the oil cylinder.

[0013] The tool includes: a tool body, a tool sleeve sleeved at one end of the tool body, and an adjusting bolt abutted against the end of the tool body sleeved inside the tool sleeve through a spring. The adjusting bolt is threadedly connected to the tool sleeve inside the tool sleeve to apply an axial force to the tool body through the spring;

[0014] An installation cavity is provided inside the tool sleeve, and the tool body and the adjusting bolt are connected by the spring inside the installation cavity.

[0015] The tool body includes a scribing segment and a connecting segment connected in sequence. Both the scribing segment and the connecting segment are cylindrical structures, and the diameter of the connecting segment is greater than that of the scribing segment;

[0016] The tool sleeve is sleeved on the connecting segment, the scribing segment passes through the head end of the tool sleeve and extends out of the tool sleeve, and the tail end of the tool sleeve is threadedly connected to the adjusting bolt.

[0017] The scribing device further includes a tool disc. The tool is connected to the bottom of the tool disc, and the tool disc is connected to the driving end of the scribing driving device.

[0018] The fixture includes a clamping device and a jacking device arranged oppositely. The clamping device and the jacking device are connected to the frame, and joints for connecting both ends of the oil cylinder are provided on the opposite sides of the clamping device and the jacking device;

[0019] The driving end of the fixture driving device is connected to the joint of the jacking device to clamp the oil cylinder and drive the oil cylinder to rotate.

[0020] The working load F of the spring n ranges as follows:

[0021] 0.2F S ≤Fn≤0.8F S ;

[0022] where F S is the test load;

[0023] The working deformation amount f of the spring n ranges:

[0024] 0.2f s ≤f n ≤0.8f s .

[0025] A scribing method of an automatic scribing machine using the automatic scribing machine includes the following steps:

[0026] Step 1: The control device sends a first driving instruction to the scribing driving device. The scribing driving device drives the tool to move to the first preset scribing position of the oil cylinder based on the first driving instruction and scribe along the axial direction of the oil cylinder to form a first reference line; and the control device sends a reset instruction to the scribing driving device, and the scribing driving device resets the tool based on the reset instruction;

[0027] Step 2: The control device sends a second driving instruction to the scribing driving device and a third driving instruction to the fixture driving device, so that the fixture driving device drives the oil cylinder to rotate based on the third driving instruction, and the scribing driving device drives the tool to move to the second preset scribing position based on the second driving instruction, and a second reference line is formed along the circumference at the top of the rotated oil cylinder. The second reference line is perpendicular to and intersects the first reference line, and the intersection point of the first reference line and the second reference line is used to correspond to the welding position of the oil cylinder accessory.

[0028] Step 2 includes:

[0029] S21: The control device sends the first control instruction in the third driving instruction for controlling the fixture driving device to the fixture driving device. The fixture driving device rotates the oil cylinder clockwise at the first rotation speed based on the first control instruction until the first reference line formed in Step 1 stops rotating after rotating to the first stop position with the rotation of the oil cylinder; a preset angle is formed between the first stop position and the first preset scribing position;

[0030] S22: The control device sends the second control instruction for moving the tool in the second driving instruction to the scribing driving device. The scribing driving device controls the tool to move horizontally to the upper side of the second preset scribing position based on the second control instruction;

[0031] S23: The control device sends the third control instruction for moving the tool in the second driving instruction. The scribing driving device controls the tool to move downward until the tool contacts the oil cylinder based on the third control instruction;

[0032] S24: The control device sends the fourth control instruction in the third driving instruction for controlling the fixture driving device to the fixture driving device. The fixture driving device rotates the oil cylinder to the second stop position at the second rotation speed based on the fourth control instruction, so that the tool forms a second reference line with a preset length on the outer wall of the oil cylinder, and the second reference line intersects the first reference line.

[0033] (III) Beneficial effects

[0034] The beneficial effects of the present invention are as follows: An automatic scribing machine for welding oil cylinder accessories proposed in the embodiments of the present invention can scribe along the axial and circumferential directions of the outer wall of the oil cylinder to form continuous and clear lines, and provide positioning for the subsequent welding of the oil cylinder joint and the connecting piece by drawing the intersecting lines in the axial and circumferential directions.

[0035] By setting up the fixture, both ends of the oil cylinder can be fixed and the oil cylinder can be driven to rotate, so as to cooperate with the scribing device to realize the circumferential scribing of the outer wall of the oil cylinder.

[0036] The scribing device includes a cutter, a cutter head and a scribing driving device. Through the scribing driving device, the cutter head can be driven to drive the cutter to move, so as to realize the scribing operation on the outer wall of the oil cylinder.

[0037] A rotatable adjusting bolt is provided at the end of the tool sleeve of the cutter. A spring is connected between the tool body and the adjusting bolt, so that the tool body and the tool sleeve can move relative to each other. By applying a working load to the tool body through the spring, it can avoid the scribing line break caused by the factors such as flatness and deviation of the outer wall of the oil cylinder. At the same time, the adjusting bolt can adjust the working load of the spring, so that the cutter has a wider applicability. Description of the Drawings

[0038] Figure 1 It is a schematic structural diagram of the automatic scribing machine of the present invention;

[0039] Figure 2 It is a sectional view of the scribing device of the present invention;

[0040] Figure 3 It is a sectional view of the tool sleeve of the present invention;

[0041] Figure 4 It is a side view of the tool body of the present invention;

[0042] Figure 5 It is a side view of the spring of the present invention;

[0043] Figure 6 It is a side view of the adjusting bolt of the present invention;

[0044] Figure 7 It is a schematic diagram of the scribing position of the first reference line of the present invention;

[0045] Figure 8 It is a schematic diagram of the scribing position of the second reference line of the present invention.

[0046]

Description of the Reference Numerals

[0047] 11: Clamping device; 12: Tightening device;

[0048] 2: Oil cylinder;

[0049] 3: Scribing device; 31: Cutter; 32: Cutter head;

[0050] 311: Tool body; 312: Spring; 313: Tool sleeve; 314: Adjusting bolt; 315: Scribing segment; 316: Connecting segment; 317: Tool tip; 318: Through hole;

[0051] a: The first preset scribing position; a': The first stop position; b: The second preset scribing position. Detailed implementation mode

[0052] For better explaining the present invention for easy understanding, the present invention will be described in detail below in conjunction with the drawings through specific implementation modes. Among them, the orientation nouns such as "upper", "lower", etc. mentioned in this article are Figure 1 used as a reference for orientation.

[0053] When welding the oil cylinder joint on the oil cylinder 2, scribing is required on the outer wall of the oil cylinder 2 to provide positioning for welding the oil cylinder joint. Since the oil cylinder 2 has a columnar structure, the scribing machine needs to have the functions of circumferential and axial scribing on the circumferential outer wall of the oil cylinder 2 at the same time. An automatic scribing machine proposed by the present invention can perform circumferential and axial scribing on the circumferential outer wall of the oil cylinder 2 and form continuous and clear lines to provide positioning for subsequent welding of the oil cylinder joint and connecting parts.

[0054] To better understand the above technical solutions, the exemplary embodiments of the present invention will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to be able to convey the scope of the present invention completely to those skilled in the art.

[0055] Refer to the attached Figure 1 As shown in the figure, an automatic scribing machine for welding oil cylinder accessories proposed in an embodiment of the present invention is applied to scribing on the outer wall of the oil cylinder 2 when welding oil cylinder accessories to provide positioning for welding oil cylinder accessories. The oil cylinder accessories include connecting parts such as lifting rings and joint seats that need to be welded. The automatic scribing machine includes a frame, a fixture for connecting the oil cylinder 2 and driving the oil cylinder 2 to rotate, a scribing device 3 for scribing on the outer wall of the oil cylinder 2, and a control device. The fixture includes a fixture driving device. The fixture driving device drives the fixture to clamp the oil cylinder 2. The control device controls the scribing device 3 to move to the scribing position, and then controls the fixture driving device to drive the fixture to drive the oil cylinder 2 to rotate, so as to realize the circumferential scribing of the scribing device 3 on the outer wall of the oil cylinder 2.

[0056] The fixture includes a clamping device 11 and a pressing device 12 arranged oppositely. The clamping device 11 and the pressing device 12 are connected to the frame. The opposite sides of the clamping device 11 and the pressing device 12 are provided with joints for connecting both ends of the oil cylinder 2. The pressing device 12 includes a fixture driving device. The driving end of the fixture driving device is connected to the joint. The fixture driving device drives the joint to rotate to drive the oil cylinder 2 to rotate.

[0057] When fixing the oil cylinder 2, one end of the oil cylinder 2 is clamped and fixed through the joint of the clamping device 11, and the other end of the oil cylinder 2 is clamped and fixed through the joint of the jacking device 12. The fixture driving device can drive the joint of the jacking device 12 to move horizontally to realize the clamping and fixing of the oil cylinder 2. After the oil cylinder 2 is fixed by the fixture, the fixture driving device drives the joint to rotate, driving the oil cylinder to rotate to cooperate with the scribing device 3 to scribe the circumferential direction of the outer wall of the oil cylinder 2.

[0058] The scribing device 3 is located above the jacking device 2. The scribing device 3 is connected to the frame. The scribing device 3 includes a cutting tool 31, a cutter head 32 and a scribing driving device. The cutting tool 31 is connected to the bottom of the cutter head 32. The cutter head 32 is connected to the driving end of the scribing driving device. The scribing driving device can drive the cutter head 32 to move horizontally or vertically.

[0059] The scribing driving device is connected to the control device. The control device controls the scribing driving device. The scribing driving device drives the cutter head 32 to move to complete the scribing of the outer wall of the oil cylinder 2. The scribing driving device in this embodiment uses a servo motor to drive the cutter head 32 in the horizontal and vertical directions.

[0060] When using the scribing device 3 to scribe the circumferential direction of the oil cylinder 2, the scribing driving device drives the cutter head 32 to move horizontally to the position above the scribing position, and then drives the cutter head 32 to move downward until the cutting tool 31 abuts against the outer wall of the oil cylinder 2. The fixture driving device drives the jacking device 12 to drive the oil cylinder 2 to rotate to realize the circumferential scribing of the outer wall of the oil cylinder 2.

[0061] When using the scribing device 3 to scribe the axial direction of the oil cylinder 2, the scribing driving device drives the cutter head 32 to move horizontally to the position above the scribing position, and then drives the cutter head 32 to move downward until the cutting tool 31 abuts against the outer wall of the oil cylinder 2, and continuously moves horizontally in the scribing direction to realize the axial scribing of the outer wall of the oil cylinder 2.

[0062] See Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 6 See Appendix Figure 4 The cutting tool 31 includes a tool body 311, a tool sleeve 313 and an adjusting bolt 314 connected in sequence. See Appendix

[0063] The tool body 311 is integrally made of diamond. Diamond has extremely high hardness, wear resistance, low thermal expansion coefficient, high thermal conductivity and other characteristics. When the tool body 311 contacts the outer wall of the oil cylinder 2, indentations can be formed. If a certain pressure is applied by the tool body 311 to the outer wall of the oil cylinder 2, obvious traces can be formed.

[0064] See the appendix Figure 3 , the inside of the tool sleeve 313 has an installation cavity. The head end of the tool sleeve 313 is sleeved on the connecting section 316, and the head end of the drawn line segment 315 passes through the tool sleeve 313 and extends to the outside of the tool sleeve 313. The head end of the tool sleeve 313 has a through hole 318 for passing the drawn line segment 315.

[0065] The tail end of the tool sleeve 313 is threadedly connected with the adjusting bolt 314, and the inner wall of the installation cavity is provided with threads for connecting the adjusting bolt 314. A spring 312 is also provided inside the tool sleeve 313. The head end of the spring 312 is fixedly connected to the connecting section 316, and the tail end of the spring 312 is fixedly connected to the adjusting bolt 314. Since the spring 312 has a certain elasticity, by screwing in or out the adjusting bolt 314, the pressure of the adjusting bolt 314 on the spring 312 can be adjusted, thereby adjusting the pressure of the spring on the tool body 311. When the tool body 311 is scribing, the spring 312 reacts on the tool body 311 by elastic force, and the tool body 311 gives a scribing pressure to the outer wall of the oil cylinder 2, so that the tool body 311 can scribe clearly and continuously on the outer wall of the oil cylinder 2. At the same time, it can also prevent the tool body 311 from exerting excessive force on the outer wall of the oil cylinder 2 and causing damage.

[0066] When the tool body 311 scribes on the outer wall of the oil cylinder 2, the tool body 311 needs to apply pressure to the outer wall of the oil cylinder 2 in order to form a scribed line on the outer wall of the oil cylinder 2. However, considering many shape factors such as flatness and deviation that may exist in the shape of the oil cylinder, a spring 312 is provided inside the tool sleeve 313. When the tool body 311 is scribing, under the reaction force of the outer wall of the oil cylinder 2, it squeezes the spring 312 inward. Under the action of the spring elastic force of the spring 312, it reacts on the tool body 311 and gives a working load (pressure) to the outer wall of the oil cylinder 2. By providing the spring 312, the tool body 311 can have an adjustable space. Under the action of the elastic force of the spring 312, the tool body 311 will always fit the outer wall of the oil cylinder 2, and will not be directly separated from the outer wall of the oil cylinder 2 due to the shape factors (flatness, deviation) of the oil cylinder, resulting in scribed line breakage.

[0067] See the appendix Figure 5 , the spring 312 is a standard part spring made of 65Mn material, with a wire diameter d of 1.6 mm, an outer diameter D2 of 9 mm, a mean diameter D of 7.5 mm, a free height H0 of 40 mm, an effective number of turns n of 10 turns, a shear modulus G of 79 GPa, an elastic modulus E of 206 GPa, a spring constant k of 15.34, and a test shear stress τ s is 570 MPa, and the ratio of height to diameter b = H0 / D = 5.3.

[0068] By using the above parameters of the spring 312, calculating the working load and working deformation of the spring 312, the working load range and working deformation range of the spring 312 can be obtained. According to the working load range and working deformation range, the pressure control of the spring 312 on the tool 31 is realized. The calculation method is as follows:

[0069] S1: Calculate the spring coefficient of the spring 312. The calculation formula is as follows:

[0070]

[0071] S2: Calculate the test load of the spring 312. The calculation formula is as follows:

[0072]

[0073] S3: Calculate the test deformation of the spring 312. The calculation formula is as follows:

[0074]

[0075] According to the test load F S calculated in step S2, calculate the working load F n range of the spring 312:

[0076] 0.2F S ≤Fn≤0.8F S ;

[0077] The working load range of the spring 312 is obtained as:

[0078] 24.44N≤Fn≤97.74N;

[0079] According to the test deformation f s calculated in step S3, calculate the working deformation f n range of the spring 312:

[0080] 0.2f s ≤f n ≤0.8f s ;

[0081] The working deformation range of the spring 312 is obtained as:

[0082] 1.59mm≤fn≤6.368mm.

[0083] That is, the adjustable working deformation range of the spring 312 is 1.59mm≤fn≤6.368mm. Adjusting the working deformation of the spring 312 can correspondingly adjust the working load of the spring 312. The applicable working load range of the spring 312 is 24.44N≤Fn≤97.74N.

[0084] For example, when assembling the tool body 311, the initial deformation of the control spring 312 is controlled to be 4 mm. When controlling the tool body 311 to perform scribing operation, the pressing distance of the tool tip (the first end of the tool body 311) of the tool body 311 is 2 mm, and clear and continuous scribing can be formed on the outer wall of the cylindrical oil cylinder 2. It is also possible to control and adjust the initial deformation of the spring 312 by adjusting the bolt 314 according to the actual shape requirements of the oil cylinder 2, or to control the pressing distance of the tool tip by controlling the descending distance of the tool disc 32.

[0085] By setting the adjusting bolt 314 to press the spring 312 to generate a working deformation of the spring 312, and by adjusting the working deformation of the spring 312, the adjustment of the working load of the spring 312 is realized. By arranging the spring 312 with a working load inside the tool sleeve 313, the above scribing requirements can be met, and at the same time, it has a wider applicability.

[0086] The bottom of the tool disc 32 is provided with a connection groove for connecting the tool 31, and the tool 31 is inserted into the connection groove and detachably connected to the tool disc. The tool 31 and the tool disc 32 can adopt detachable connection forms such as threaded connection and clamping connection, which can be selected according to actual requirements.

[0087] The control device includes a computer, and through computer calculation, the movement of the tool 31 and the rotation of the fixture can be accurately controlled to realize the control of the scribing position and scribing length of the tool 31.

[0088] The present invention also provides a scribing method for an automatic scribing machine, which can realize the welding positioning of the oil cylinder joint and the connecting piece, and includes the following steps:

[0089] Step 1: The control device sends a first driving instruction to the scribing driving device, and the scribing driving device drives the tool 31 to move to the first preset scribing position a of the oil cylinder 2 based on the first driving instruction and scribes along the axial direction of the oil cylinder 2 to form a first reference line; and the control device sends a reset instruction to the scribing driving device, and the scribing driving device resets the tool 31 based on the reset instruction;

[0090] Step 2: The control device sends a second driving instruction to the scribing driving device and a third driving instruction to the fixture driving device, so that the fixture driving device drives the oil cylinder 2 to rotate based on the third driving instruction, and the scribing driving device drives the tool 31 to move to the second preset scribing position b based on the second driving instruction, and forms a second reference line along the circumferential direction on the top of the rotated oil cylinder 2. The second reference line is perpendicular to and intersects the first reference line, and the intersection point of the first reference line and the second reference line is used to correspond to the welding position of the oil cylinder accessory.

[0091] The above step 2 includes:

[0092] S21: The control device issues a first control instruction in the third drive instruction for controlling the fixture drive device. Based on the first control instruction, the fixture drive device rotates the oil cylinder 2 clockwise at a first rotational speed until the first reference line formed in step one rotates with the oil cylinder 2 to the first stop position a' and then stops rotating; a preset angle is formed between the first stop position a' and the first preset scribing position a.

[0093] In this embodiment, the preset angle is 10°. The function of this preset angle is that when drawing the second reference line, the second reference line can pass through the first reference line, that is, a clear intersection point is formed between the first reference line and the second reference line.

[0094] S22: The control device issues a second control instruction in the second drive instruction for moving the tool. Based on the second control instruction, the scribing drive device controls the tool 31 to move horizontally to the left to the second preset scribing position b.

[0095] S23: The control device issues a third control instruction in the second drive instruction for moving the tool. Based on the third control instruction, the scribing drive device controls the tool 31 to move downward until the tool 31 contacts the oil cylinder 2.

[0096] S24: The control device issues a fourth control instruction in the third drive instruction for controlling the fixture drive device. Based on the fourth control instruction, the fixture drive device rotates the oil cylinder 2 at a second rotational speed to the second stop position, so that the tool 31 forms a second reference line with a preset length on the outer wall of the oil cylinder 2, and the second reference line intersects with the first reference line.

[0097] By the above scribing method, a first reference line is formed axially on the oil cylinder 2, and a second reference line intersecting with the first reference line is formed circumferentially on the oil cylinder 2, so that a clear intersection point is formed between the first reference line and the second reference line, serving as a positioning point for subsequent attachment welding, thereby realizing automatic scribing and positioning for oil cylinder attachment welding. The moving direction, moving distance of the tool 31, rotational speed and rotation angle of the oil cylinder 2 in the above scribing method are all realized based on computer programming control.

[0098] An automatic scribing machine for welding oil cylinder attachments proposed in an embodiment of the present invention can scribe axially and circumferentially on the outer wall of the oil cylinder 2 to form continuous and clear lines, and provide positioning for subsequent welding of oil cylinder joints and connectors by drawing axial and circumferential intersection lines.

[0099] By setting the fixture, both ends of the oil cylinder 2 can be fixed, and the oil cylinder 2 can be driven to rotate to cooperate with the scribing device 3 to realize circumferential scribing on the outer wall of the oil cylinder 2.

[0100] The scribing device 3 includes a cutting tool 31, a cutter head 32, and a scribing driving device. The cutter head 32 can be driven by the scribing driving device to drive the cutting tool 31 to move, so as to realize the scribing operation on the outer wall of the oil cylinder 2.

[0101] A rotatable adjusting bolt 314 is provided at the end of the tool sleeve 313 of the cutting tool 31. A spring 312 is connected between the tool body 311 and the adjusting bolt 314, enabling relative movement between the tool body 311 and the tool sleeve 313. By applying a working load to the tool body 311 through the spring 312, it is possible to prevent the cutting line from breaking due to factors such as flatness and deviation of the outer wall of the oil cylinder 2. At the same time, the adjusting bolt 314 can adjust the working load of the spring 312, making the cutting tool 31 more widely applicable.

[0102] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0103] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0104] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0105] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0106] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An automatic scribing machine for welding cylinder accessories, characterized in that, Comprising: A frame, a fixture for connecting an oil cylinder (2) and driving the oil cylinder (2) to rotate, a scribing device (3) for scribing on the outer wall of the oil cylinder (2), and a control device; The fixture and the scribing device (3) are connected to the frame; The fixture includes a fixture driving device, and the fixture driving device is used to drive the fixture to clamp the oil cylinder (2) and drive the oil cylinder (2) to rotate; The scribing device (3) is located above the oil cylinder (2), and the scribing device (3) includes a tool (31) and a scribing driving device, and the scribing driving device is used to drive the tool (31) to move horizontally and vertically; The control device is connected to the fixture driving device and the scribing driving device so that the tool (31) completes circumferential and axial scribing on the outer wall of the oil cylinder (2).

2. The automatic scribing machine for welding oil cylinder accessories according to claim 1, characterized in that The tool (31) includes: a tool body (311), a tool sleeve (313) sleeved at one end of the tool body (311), and an adjusting bolt (314) abutted against the end of the tool body (311) sleeved inside the tool sleeve (313) through a spring (312). The adjusting bolt (314) is threadedly connected to the tool sleeve (313) inside the tool sleeve (313) to apply an axial force to the tool body (311) through the spring (312); The inside of the tool sleeve (313) has an installation cavity, and the tool body (311) and the adjusting bolt (314) are connected through the spring (312) in the installation cavity.

3. The automatic scribing machine for welding oil cylinder accessories according to claim 2, characterized in that The tool body (311) includes a scribing segment (315) and a connecting segment (316) connected in sequence. Both the scribing segment (315) and the connecting segment (316) are cylindrical structures, and the diameter of the connecting segment (316) is larger than the diameter of the scribing segment (315); The tool sleeve (313) is sleeved on the connecting segment (316), the scribing segment (315) passes through the head end of the tool sleeve (313) and extends outside the tool sleeve, and the tail end of the tool sleeve (313) is threadedly connected to the adjusting bolt (314).

4. The automatic scribing machine for welding oil cylinder accessories according to claim 1, characterized in that The scribing device (3) further includes a tool disc (32), the tool (31) is connected to the bottom of the tool disc (32), and the tool disc (32) is connected to the driving end of the scribing driving device.

5. The automatic scribing machine for welding oil cylinder accessories according to claim 1, characterized in that The fixture includes a clamping device (11) and a pressing device (12) arranged oppositely. The clamping device (11) and the pressing device (12) are connected to the frame, and joints for connecting both ends of the oil cylinder (2) are provided on the opposite sides of the clamping device (11) and the pressing device (12); The driving end of the fixture driving device is connected to the joint of the pressing device (12) to clamp the oil cylinder (2) and drive the oil cylinder (2) to rotate.

6. The automatic scribing machine for welding cylinder accessories according to claim 2, characterized in that The working load F of the spring (312) n ranges as follows: 0.2F S 0.2F ≤ Fn ≤ 0.8F S ; Among them, F S is the test load; The working deformation amount f of the spring (312) n Range: 0.2f s ≤f n ≤0.8f s ; Among them, f s is the test deformation amount.

7. A scribing method for an automatic scribing machine, characterized in that, The automatic scribing machine described in any one of claims 1-5 is adopted, and the following steps are included: Step 1: The control device sends a first driving instruction to the scribing driving device, and the scribing driving device drives the tool (31) to move to the first preset scribing position (a) of the cylinder (2) based on the first driving instruction, and scribes along the axial direction of the cylinder (2) to form a first reference line; And the control device sends a reset instruction to the scribing driving device, and the scribing driving device resets the tool (31) based on the reset instruction; Step 2: The control device sends a second driving instruction to the scribing driving device and a third driving instruction to the fixture driving device, so that the fixture driving device drives the cylinder (2) to rotate based on the third driving instruction, and the scribing driving device drives the tool (31) to move to the second preset scribing position (b) based on the second driving instruction, and a second reference line is formed circumferentially on the top of the rotated cylinder (2), the second reference line is perpendicular to and intersects the first reference line, and the intersection point of the first reference line and the second reference line is used to correspond to the welding position of the cylinder accessories.

8. The scribing method of the automatic scribing machine according to claim 7, characterized in that Step 2 includes: S21: The control device sends a first control instruction in the third driving instruction for controlling the fixture driving device to the fixture driving device, and the fixture driving device makes the cylinder (2) rotate clockwise at a first rotation speed based on the first control instruction until the first reference line formed in Step 1 rotates with the cylinder (2) to the first stop position (a') and then stops rotating; a preset angle is formed between the first stop position (a') and the first preset scribing position (a); S22: The control device sends a second control instruction for moving the tool in the second driving instruction to the scribing driving device, and the scribing driving device controls the tool (31) to move horizontally to the upper side of the second preset scribing position (b) based on the second control instruction.

9. The scribing method of the automatic scribing machine according to claim 8, characterized in that Step 2 further includes: S23: The control device issues a third control instruction for moving the tool in the second driving instruction, and the scribing driving device controls the tool (31) to move downward based on the third control instruction until the tool (31) contacts the cylinder (2); S24: The control device issues a fourth control instruction in the third driving instruction for controlling the fixture driving device, and the fixture driving device makes the cylinder (2) rotate to the second stop position at a second rotation speed based on the fourth control instruction, so that the tool (31) forms a second reference line with a preset length on the outer wall of the cylinder (2), and the second reference line intersects the first reference line.

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