Thermocouple head bending forming tool

Abstract

The invention relates to the field of thermocouple processing devices, in particular to a thermocouple head bending forming tool which comprises a bottom plate, a first bending mechanism and a second bending mechanism. The first bending mechanism and the second bending mechanism are arranged on the bottom plate and do not interfere with each other. The first bending mechanism is provided with a first profiling structure, and the first profiling structure is provided with a first bending part; the second bending mechanism is provided with a second profiling structure, and the second profiling structure is provided with a second bending part. In the process of manufacturing the thermocouple heads with the round heads on a large scale, the product consistency of the thermocouple heads with the round heads is improved through the first bending mechanism and the second bending mechanism; the thermocouple head with the round head can be obtained only through two steps, so that the manufacturing efficiency of the thermocouple head with the round head is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of thermocouple processing device, and particularly relates to a thermocouple junction bending forming tool. BACKGROUND

[0002] The thermocouple temperature sensor is mainly used for medium and high temperature measurement such as high-pressure compressor outlet total temperature, compressor outlet total temperature, high-pressure turbine casing wall temperature, low-pressure turbine outlet total temperature and exhaust temperature on an aero-engine. The thermocouple temperature sensor has the advantages of high precision, high stability and good reliability.

[0003] In the manufacturing process of one thermocouple, the thermocouple junction is made into a round head shape and a size corresponding to the shape. Although the specified shape and size can be achieved by using a manual method, the product consistency of the plurality of thermocouple junctions manufactured by using the manual method is low, and the manufacturing efficiency is low.

[0004] Therefore, under the condition that the thermocouple junction with the round head is required to be manufactured, how to improve the product consistency and the manufacturing efficiency of the thermocouple junction becomes a technical problem to be solved. SUMMARY

[0005] To solve the technical problem of how to improve the product consistency and the manufacturing efficiency of the thermocouple junction under the condition that the thermocouple junction with the round head is required to be manufactured, the present application provides a thermocouple junction bending forming tool.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0007] According to one aspect of the present application, a thermocouple junction bending forming tool is provided, which comprises a bottom plate, a first bending mechanism and a second bending mechanism.

[0008] The first bending mechanism and the second bending mechanism are respectively arranged on the bottom plate, and the first bending mechanism and the second bending mechanism do not interfere with each other.

[0009] The first bending mechanism is provided with a first profiling structure, wherein the first profiling structure is provided with a first bending part.

[0010] The second bending mechanism is provided with a second profiling structure, wherein the second profiling structure is provided with a second bending part.

[0011] Further, the first bending mechanism comprises a pressing plate, a first positioning shaft and a locking screw.

[0012] The first positioning shaft is arranged on the bottom plate, and the center line of the first positioning shaft is perpendicular to the bottom plate.

[0013] The pressure plate is provided with an opening groove, the opening direction of the opening groove is facing the first positioning shaft, the first positioning shaft is the first contour structure, and the first bent part is a part of the cylindrical surface of the first positioning shaft facing the opening groove.

[0014] The pressure plate is detachably connected to the base plate by the locking screw.

[0015] Furthermore, the pressure plate is provided with a positioning groove;

[0016] The locking screw is limited to a knurled head screw, wherein the circumferential surface of the head of the knurled head screw is provided with knurled patterns, and the screw portion of the knurled head screw passes through the positioning groove and is connected to the base plate.

[0017] Furthermore, the base plate is provided with two working slots;

[0018] Each of the working slots is recessed into the base plate to form a blind slot structure, wherein the first positioning shaft is provided between two of the working slots.

[0019] Furthermore, the second bending mechanism includes a spindle mechanism, a left-side block, a right-side block, and a second positioning shaft;

[0020] The mandrel mechanism and the second positioning shaft are respectively disposed on the base plate, and the center line of the mandrel mechanism and the center line of the second positioning shaft form a gap and are respectively perpendicular to the base plate;

[0021] The left block and the right block respectively form a rotating pair with the spindle mechanism;

[0022] The left block, the right block, and the second positioning shaft together form the second contouring structure, wherein the left block and the right block are respectively provided with the second bending portion.

[0023] Furthermore, the left block is provided with a first working part facing the right block. The first working part is specifically processed into a first step part, a first arc part, and a first straight part. The first arc part is located between the first step part and the first straight part. The distance between the first step part and the second positioning axis is smaller than the distance between the first straight part and the second positioning axis. The intersection of the first arc part and the first straight part is one of the second bending parts.

[0024] The right block is provided with a second working part facing the left block. The second working part is specifically processed into a second step part, a second arc part and a second straight part. The second arc part is located between the second step part and the second straight part. The distance between the second step part and the second positioning axis is less than the distance between the second straight part and the second positioning axis. The intersection of the second arc part and the second straight part is another second bend part.

[0025] The first working part and the second working part have a first state in which the included angle is adjusted to the maximum and a second state in which the included angle is adjusted to the minimum. When the first working part and the second working part are in the second state, the outlines of the first arc portion and the second arc portion are spaced apart from each other and respectively overlap with the outline of a reference circle. The first straight portion and the second straight portion are parallel to each other and have a gap.

[0026] Furthermore, the left block and the right block are each provided with a handle.

[0027] Furthermore, the spindle mechanism includes a spindle, a hexagonal nut, a washer, and a retaining nut;

[0028] The mandrel includes a shaft, a first positioning part, and a second positioning part. The first positioning part and the second positioning part protrude from the shaft along the radial direction of the shaft. The mandrel is provided with external threads. The first positioning part and the second positioning part are cylindrical. The diameter of the first positioning part is larger than the diameter of the second positioning part.

[0029] The base plate is provided with a positioning through hole and a mounting groove. The positioning through hole passes through the base plate, and the mounting groove is recessed into the base plate in the shape of a blind groove. The positioning through hole and the mounting groove are coaxial and communicate with each other. The mandrel is inserted into the positioning through hole and the mounting groove respectively. The second positioning part forms a clearance fit with the positioning through hole. The fixing nut is connected to the mandrel located in the mounting groove.

[0030] The left block and the right block are respectively provided with mounting through holes, and each mounting through hole forms a clearance fit with the first positioning part.

[0031] The hexagonal nut is connected to the spindle, and the washer is provided between the hexagonal nut and the second bending mechanism.

[0032] The above technical solution has the following advantages or beneficial effects:

[0033] This invention provides a thermocouple head bending and forming fixture. A first bending mechanism bends the positive and negative electrode wires into a first intermediate product, the target segment of which forms a semi-circle. Then, the first intermediate product is bent into a thermocouple head with a round head by a second bending mechanism. In the mass production of thermocouple heads with round heads, the shape of each positive and negative electrode wire bent into the first intermediate product is constrained to be consistent by the first bending mechanism, and the shape of the first intermediate product bent into the thermocouple head with a round head is constrained to be consistent by the second bending mechanism, thereby improving the product consistency of the thermocouple heads with round heads. The positive and negative electrode wires are bent by the first and second bending mechanisms respectively, requiring only two steps to obtain a thermocouple head with a round head, thus improving the manufacturing efficiency of thermocouple heads with round heads. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a thermocouple head bending and forming tool provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of a thermocouple head bending and forming tool provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the structure of the left-shaped block provided in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the right-shaped block provided in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the mandrel provided in an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the structure of the pressure plate provided in an embodiment of the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of a positive and negative pole dipole wire with a circular head, provided in an embodiment of the present invention. Detailed Implementation

[0041] Example 1:

[0042] In this embodiment, a thermocouple head bending forming tool is provided to solve the technical problem of how to improve the product consistency and manufacturing efficiency of thermocouple heads when required to manufacture thermocouple heads with round heads.

[0043] For details, see Figure 1 or Figure 2 This embodiment of a thermocouple head bending forming fixture includes a base plate 1, a first bending mechanism 2, and a second bending mechanism 3.

[0044] The first bending mechanism 2 and the second bending mechanism 3 are respectively mounted on the base plate 1, and the first bending mechanism 2 and the second bending mechanism 3 do not interfere with each other;

[0045] The first bending mechanism 2 is provided with a first contouring structure, wherein the first contouring structure is provided with a first bending portion;

[0046] The second bending mechanism 3 is provided with a second contouring structure, wherein the second contouring structure is provided with a second bending portion.

[0047] The base plate 1 is generally flat and has a first surface and a second surface. In actual installation, when the base plate 1 is placed on a platform or mechanical equipment, the first surface is located above the second surface and can be viewed from above by a person's line of sight.

[0048] The first bending mechanism 2 and the second bending mechanism 3 are respectively installed on the base plate 1 located on the first surface, which facilitates the operation of the first bending mechanism 2 and the second bending mechanism 3 by the staff.

[0049] The first contouring structure of the first bending mechanism 2 is used to restrict the position of a portion of the thermocouple, and the first bending portion of the first contouring structure is used to restrict the bending and forming position of the thermocouple head. Similarly, the second contouring structure of the second bending mechanism 3 is used to restrict the position of a portion of the thermocouple, and the second bending portion of the second contouring structure is used to restrict the bending and forming position of the thermocouple head.

[0050] In the actual use of a thermocouple head bending and forming tooling according to this embodiment, the positive and negative pole wires (i.e., the wires of the thermocouple, the same below) that have been welded are obtained. The intersection of the positive and negative pole wires is the welding part H, which is common knowledge.

[0051] For ease of understanding by those skilled in the art, see [link to relevant documentation]. Figure 7 The positive and negative pole wires located at the welding part H are defined as target segment D1, and the positive and negative pole wires located on both sides of target segment D1 are defined as first long segment D2 and second long segment D3, respectively.

[0052] After obtaining the positive and negative pole wires, the positive and negative pole wires are now straight; the positive and negative pole wires are then placed on the first bending mechanism 2, wherein, see... Figure 2 or Figure 7The welding part H is positioned to align with the contour of the first contour structure, so that the target segment D1 is temporarily positioned relative to the first bending mechanism 2. Then, the workers apply force to the first long segment D2 and the second long segment D3 respectively, forcing the first long segment D2 and the second long segment D3 to rotate along the arc path and move closer to each other. That is, the angle between the first long segment D2 and the second long segment D3 changes from an obtuse angle to an acute angle, thereby causing the target segment D1 to bend.

[0053] During the process of the first long segment D2 and the second length approaching each other, the target segment D1 applies a force to the first contouring structure. Correspondingly, the target segment D1 is blocked by the first contouring structure, causing the target segment D1 to deform. This further causes a part of the target segment D1 to fit tightly into the first contouring structure and form a first curved structure. In addition to the target segment D1 forming the first curved structure, the first long segment D2 and the second length still maintain a roughly straight shape and extend away from the target segment D1, thereby forming the first intermediate product.

[0054] After obtaining the first intermediate product, the workers remove the first intermediate product from the first bending mechanism 2 and then place the first intermediate product on the second bending mechanism 3.

[0055] When the first intermediate product is placed on the second bending mechanism 3, the connection position of the target segment D1, or the target segment D1, with the first long segment D2 and the second long segment D3 respectively, is aligned with the outline of the second contour structure, thereby forming a temporary positioning of the first intermediate product relative to the second bending mechanism 3.

[0056] Then, the operator operates the second bending mechanism 3, causing the second conforming mechanism to clamp the first intermediate product; during this process, the connection points between the first long segment D2 and the second long segment D3, or the target segment D1 and the first long segment D2 and the second long segment D3, are deformed by the force of the second bending mechanism 3, thereby forming a preset shape (see...). Figure 7 When the second contouring mechanism has fully transformed into the preset shape, at least the target segment D1 has formed the circular head of the thermocouple (see...). Figure 7 The shape of the thermocouple head has been completed, while most of the first long segment D2 and the second long segment D3 remain straight.

[0057] Finally, the staff will remove the positive and negative dipole wires located in the second bending mechanism 3 and transfer them to the subsequent work station.

[0058] This embodiment provides a thermocouple head bending and forming fixture. A first bending mechanism bends the positive and negative electrode wires into a first intermediate product, the target segment of which forms a semi-circle. Then, the first intermediate product is bent into a thermocouple head with a round head by a second bending mechanism. In the mass production of thermocouple heads with round heads, the shape of each positive and negative electrode wire bent into the first intermediate product is constrained to be consistent by the first bending mechanism, and the shape of the first intermediate product bent into the thermocouple head with a round head is constrained to be consistent by the second bending mechanism, thereby improving the product consistency of the thermocouple heads with round heads. The positive and negative electrode wires are bent by the first and second bending mechanisms respectively, requiring only two steps to obtain a thermocouple head with a round head, thus improving the manufacturing efficiency of thermocouple heads with round heads.

[0059] Further, see Figure 1 , Figure 2 or Figure 6 In this embodiment, a thermocouple head bending forming tooling is provided. The first bending mechanism 2 includes a pressure plate 21, a first positioning shaft 22, and a locking screw 23.

[0060] The first positioning shaft 22 is disposed on the base plate 1, and the center line of the first positioning shaft 22 is perpendicular to the base plate 1;

[0061] The pressure plate 21 is provided with an opening slot 24, the opening direction of the opening slot 24 faces the first positioning shaft 22, the first positioning shaft 22 is a first contour structure, and the first bent part is a part of the cylindrical surface of the first positioning shaft 22 facing the opening slot 24.

[0062] The pressure plate 21 is detachably connected to the base plate 1 by locking screws 23.

[0063] The main function of the pressure plate 21 is to align the opening groove 24 on the pressure plate 21 with the first positioning shaft 22; the opening groove 24 is used to position the welding part H of the positive and negative pole wires.

[0064] The main function of the locking screw 23 is to connect the pressure plate 21 to the base plate 1 in a detachable manner. Depending on the thickness or diameter of the positive and negative polarity wires, the position of the pressure plate 21 relative to the first positioning shaft 22 needs to be adjusted so that the pressure plate 21 and the first positioning shaft 22 can only accommodate the positive and negative polarity wires of the corresponding thickness or diameter, thereby forming a temporary position of the positive and negative polarity wires relative to the first contour structure.

[0065] Preferred, see Figure 2 or Figure 6 The pressure plate 21 is provided with a positioning groove 25;

[0066] The locking screw 23 is restricted to a knurled head screw, wherein the circumferential surface of the head of the knurled head screw is provided with knurled patterns, and the screw portion of the knurled head screw passes through the positioning groove 25 and is connected to the base plate 1.

[0067] When actually connecting the pressure plate 21 and the base plate 1, the screw head of the knurled head screw is passed through the positioning groove 25 and connected to the threaded hole of the base plate 1. The head of the knurled head screw is provided with a rough surface formed by the knurling process. This rough surface is used to increase the coefficient of friction with the worker's hand, thereby increasing the friction between the knurled head screw and the worker's hand.

[0068] The first positioning shaft 22 is cylindrical and is detachably connected to the base plate 1. The connection methods between the two include, but are not limited to, interference fit and clearance fit.

[0069] For batch bending of the same type of positive and negative dipole wires, the following first bending method can be used:

[0070] First, the position of the opening slot 24 of the pressure plate 21 relative to the first positioning shaft 22 is adjusted so that the distance between the pressure plate 21 and the first positioning shaft 22 matches the thickness or diameter of the positive and negative pole wires. Then, the operator places the positive and negative pole wires in the gap between the pressure plate 21 and the first positioning shaft 22, and aligns the welded part H of the positive and negative pole wires with the opening slot 24 to form a temporary position. Next, the operator applies force to both ends of the positive and negative pole wires to make a closing action, so that the distance between the two ends of the positive and negative pole wires decreases and the positive and negative pole wires gradually surround the first positioning shaft 22. Among them, a part of the cylindrical surface of the first positioning shaft 22 facing the opening slot 24 becomes the first bending part. A part of the positive and negative pole wires are attached to the first bending part and bent into a semi-circle, thus forming a semi-circular target segment D1. The remaining positive and negative pole wires remain roughly straight and are kept as the first long segment D2 and the second long segment D3, completing the bending work of the positive and negative pole wires in the first bending mechanism 2.

[0071] For bending operations involving two or more positive and negative dipole wires, the following second bending method can be used:

[0072] First, adjust the position of the opening slot 24 of the pressure plate 21 relative to the first positioning shaft 22 according to the thickness or diameter of the first type of positive and negative pole wire, so that the distance between the pressure plate 21 and the first positioning shaft 22 matches the thickness or diameter of the first type of positive and negative pole wire; then, the operator places the first type of positive and negative pole wire in the gap between the pressure plate 21 and the first positioning shaft 22, and aligns the welding part H of the first type of positive and negative pole wire with the opening slot 24 to form a temporary position; next, the operator applies force to both ends of the first type of positive and negative pole wire to make a closing action, so that the distance between the two ends of the first type of positive and negative pole wire decreases, and the first type of positive and negative pole wire gradually surrounds the first positioning shaft 22. Among them, a part of the cylindrical surface of the first positioning shaft 22 facing the opening slot 24 becomes the first bending part, a part of the first type of positive and negative pole wire is attached to the first bending part and the bending is semi-circular, while the remaining first type of positive and negative pole wires remain roughly straight, thus completing the bending work of the first type of positive and negative pole wires in the first bending mechanism;

[0073] Before bending the second type of positive and negative pole wire, the worker adjusts the position of the opening groove 24 of the pressure plate 21 relative to the first positioning shaft 22 so that the distance between the pressure plate 21 and the first positioning shaft 22 matches the thickness or diameter of the second type of positive and negative pole wire; the subsequent work is the same as the temporary positioning and bending process of the first type of positive and negative pole wire, and will not be described again here.

[0074] Further, see Figure 1 or Figure 2 In this embodiment, a thermocouple head bending forming tool is provided with two working grooves 26 on the base plate 1.

[0075] Each working groove 26 is recessed into the base plate 1 to form a blind groove structure, wherein a first positioning shaft 22 is provided between two working grooves 26.

[0076] After the aforementioned positive and negative dipole wires have completed the bending process through the first bending mechanism, the positive and negative dipole wires are now attached to the bottom edge. It is difficult for the operator to directly remove the positive and negative dipole wires from the first bending mechanism, or the removal process may cause unexpected deformation of the already bent positive and negative dipole wires. Therefore, in this embodiment, two working grooves 26 are provided on the base plate 1. The working grooves 26 are recessed into the base plate 1, which makes it easier for the operator to place their fingers in the working grooves 26 to grasp the positive and negative dipole wires attached to the base plate 1, thereby reducing the occurrence of unexpected deformation of the positive and negative dipole wires during the removal of the positive and negative dipole wires from the first bending mechanism.

[0077] Further, see Figure 1 or Figure 2 In this embodiment, a thermocouple head bending forming tooling is provided. The second bending mechanism 3 includes a mandrel mechanism, a left block 31, a right block 32, and a second positioning shaft 33.

[0078] The mandrel mechanism and the second positioning shaft 33 are respectively mounted on the base plate 1, and the center line of the mandrel mechanism and the center line of the second positioning shaft 33 form a gap and are perpendicular to the base plate 1 respectively;

[0079] Left block 31 and right block 32 form rotating pairs with the spindle mechanism respectively;

[0080] The left block 31, the right block 32, and the second positioning shaft 33 together form the second contouring structure, wherein the left block 31 and the right block 32 are respectively provided with a second bending part.

[0081] The mandrel mechanism is detachably mounted on the base plate 1, and the axis of the mandrel mechanism is perpendicular to the base plate 1; the connection structure between the mandrel mechanism and the base plate 1 can be bolted or interference fit, etc.

[0082] Correspondingly, the second positioning shaft 33 is detachably mounted on the base plate 1, and the axis of the second positioning shaft 33 is perpendicular to the base plate 1; the connection method between the second positioning shaft 33 and the base plate 1 is the same as the connection method between the first positioning shaft 22 and the base plate 1 mentioned above, and will not be described again here.

[0083] The left block 31 and the right block 32 form a rotating pair with the spindle mechanism, so that the left block 31 and the right block 32 can rotate around the axis of the spindle mechanism; the left block 31 and the right block 32 form a second contouring structure with the second positioning shaft 33, and the second contouring structure can be made into various shapes according to actual needs;

[0084] To facilitate understanding by those skilled in the art, this embodiment is described in detail according to the second contour structure having an arc portion;

[0085] For details, see Figure 2 , Figure 3 or Figure 4 In this embodiment, a thermocouple head bending forming fixture is provided with a first working part facing the right block 32 on the left block 31. The first working part is specifically processed into a first step part 311, a first arc part 312 and a first straight part 313. The first arc part 312 is located between the first step part 311 and the first straight part 313. The distance between the first step part 311 and the second positioning shaft 33 is smaller than the distance between the first straight part 313 and the second positioning shaft 33. The intersection of the first arc part 312 and the first straight part 313 is one of the second bending parts.

[0086] The right block 32 is provided with a second working part facing the left block 31. The second working part is specifically processed into a second step part 3 pressure plate 21, a second arc part 322 and a second straight part 323. The second arc part 322 is located between the second step part 3 pressure plate 21 and the second straight part 323. The distance between the second step part 3 pressure plate 21 and the second positioning shaft 33 is smaller than the distance between the second straight part 323 and the second positioning shaft 33. The intersection of the second arc part 322 and the second straight part 323 is another second bend.

[0087] The first working part and the second working part have a first state in which the included angle is adjusted to the maximum and a second state in which the included angle is adjusted to the minimum. When the first working part and the second working part are in the second state, the outline of the first arc portion 312 and the outline of the second arc portion 322 are spaced apart from each other and respectively overlap with the outline of a reference circle. The first straight portion 313 and the second straight portion 323 are parallel to each other and have a gap.

[0088] When using the second bending mechanism of this embodiment, the staff needs to transfer the first intermediate product to the second bending mechanism.

[0089] Before the first intermediate product (i.e., positive and negative pole dipole wires) is placed before the second bending mechanism, the first intermediate product has a semi-circular target segment D1 and a first long segment D2 and a second long segment D3 that are roughly straight. At this time, the operator needs to separate the left block 31 and the right block 32 from each other, so that the left block 31 and the right block 32 rotate around the axis of the spindle mechanism to increase the included angle between the left block 31 and the right block 32, and increase the gap between the left block 31, the right block 32 and the second positioning shaft 33.

[0090] When the first intermediate product is set in the second bending mechanism, the operator needs to set the target segment D1 between the left block 31, the right block 32 and the second positioning shaft 33, thereby forming a temporary positioning of the first intermediate product (i.e., the positive and negative pole wires) relative to the second bending mechanism. The left block 31 and the second positioning shaft 33, and the right block 32 and the second positioning shaft 33 respectively accommodate a portion of the first intermediate product. The groove structure between the left block 31 and the right block 32 is aligned with the welding part H of the positive and negative pole wires. The semi-circular target segment D1 is approximately coaxial with the second positioning shaft 33, or the semi-circular target segment D1 is in contact with the second positioning shaft 33.

[0091] During the process of closing the left block 31 and the right block 32, the first straight part 313 of the left block 31 is used to apply force to the first long segment D2, and the second straight part 323 of the right block 32 is used to apply force to the second long segment D3. Correspondingly, the second bent part on the right block 32 applies force to the second long segment D3, so that the first long segment D2 and the second long segment D3 move closer to each other.

[0092] During the process of the first long segment D2 and the second long segment D3 approaching each other, the first arc portion 312 of the left block 31 presses a portion of the target segment D1 against the second positioning shaft 33. Correspondingly, the second arc portion 322 of the right block 32 presses another portion of the target segment D1 against the second positioning shaft 33, causing the target segment D1 to be compressed into a circle. At the same time, the first straight portion 313 and the second straight portion 323 approach each other and become parallel, causing the first long segment D2 and the second long segment D3 to come into contact with each other and be compressed into a straight shape. Among them, the second bending portion of the left block 31 becomes the first corner structure between the first part of the arc structure and the straight structure, and the second bending portion of the right block 32 becomes the second corner structure between the second part of the arc structure and the straight structure.

[0093] During the process of closing the left block 31 and the right block 32, a portion of the positive and negative dipole wires located at the first bending part are subjected to three forces: a first force applied by the first bending part, a first reaction force applied by the second positioning shaft 33, and a second force applied by the right block 32. The direction of the first force is opposite to the direction of the first reaction force and the second force, and the position where the first force contacts the positive and negative dipole wires is between the position where the first reaction force contacts the positive and negative dipole wires and the position where the second force contacts the positive and negative dipole wires. Thus, under the combined action of the first force, the first reaction force, and the second force, the positive and negative dipole wires bend at an angle, and the shape of the bend fits the shape of the first arc portion 312 and the first straight portion 313.

[0094] Correspondingly, during the closing of the left block 31 and the right block 32, a portion of the positive and negative dipole wires located at the second bending section are subjected to three forces: a third force applied by the second bending section, a second reaction force applied by the second positioning shaft 33, and a fourth force applied by the left block 31. The direction of the third force is opposite to the directions of the second reaction force and the fourth force, and the position where the third force contacts the positive and negative dipole wires is between the positions where the second reaction force contacts the positive and negative dipole wires and the positions where the fourth force contacts the positive and negative dipole wires. Thus, under the combined action of the third force, the second reaction force, and the fourth force, the positive and negative dipole wires bend at an angle, and the shape of the bend conforms to the shape of the second arc section 322 and the second straight section 323.

[0095] Further, see Figure 1 In this embodiment, a thermocouple head bending forming tool is provided with handles 34 on the left block 31 and the right block 32 respectively.

[0096] The operator can hold the handle 34 on the left block 31 with their left hand and the handle 34 on the right block 32 with their right hand, and apply force to the left block 31 and the right block 32 respectively through the two handles 34, so that the operator can operate the left block 31 and the right block 32 to close.

[0097] Further, see Figure 1 The thermocouple head bending forming tool of this embodiment includes a mandrel mechanism comprising a mandrel 35, a hexagonal nut 36, a washer 37, and a fixing nut 38.

[0098] The spindle 35 includes a shaft 351, a first positioning part 352 and a second positioning part 353. The first positioning part 352 and the second positioning part 353 protrude from the shaft 351 radially. The spindle 35 is provided with external threads. The first positioning part 352 and the second positioning part 353 are cylindrical. The diameter of the first positioning part 352 is larger than the diameter of the second positioning part 353.

[0099] The base plate 1 is provided with a positioning through hole and a mounting groove. The positioning through hole passes through the base plate 1, and the mounting groove is recessed in the base plate 1 in the shape of a blind groove. The positioning through hole and the mounting groove are coaxial and connected. The spindle 35 is inserted into the positioning through hole and the mounting groove respectively. The second positioning part 353 forms a clearance fit with the positioning through hole. The fixing nut 38 is connected to the spindle 35 located in the mounting groove.

[0100] The left block 31 and the right block 32 are respectively provided with mounting through holes, and each mounting through hole forms a clearance fit with the first positioning part 352.

[0101] The hexagonal nut 36 is connected to the spindle 35, and a washer 37 is provided between the hexagonal nut 36 and the second bending mechanism 3.

[0102] The first positioning part 352 and the second positioning part 353 are coaxially arranged relative to the shaft 351. In actual application, the left block 31 and the right block 32 are respectively sleeved on the first positioning part 352, so that the left block 31 and the right block 32 form a clearance fit with the first positioning part 352. During the rotation of the left block 31 and the right block 32, the spindle 35 as a whole remains stationary relative to the base plate 1, and the left block 31 and the right block 32 rotate around the axis of the spindle 35.

[0103] The second positioning part 353 is inserted into the positioning through hole of the base plate 1, and a part of the mandrel 35 is located in the mounting groove of the base plate 1. The second positioning part 353 forms a clearance fit with the base plate 1, and the mandrel 35 located in the mounting groove is connected to the fixing nut 38. Correspondingly, the upper mandrel 35 of the left block 31 and the right block 32 is fixed by the hexagonal nut 36. The washer 37 is located between the hexagonal nut 36 and the second bending mechanism 3 composed of the left block 31 and the right block 32, and is used to increase the contact area between the hexagonal nut 36 and the second bending mechanism 3. The fixing nut 38 and the hexagonal nut 36 are used together to clamp the mandrel 35, the left block 3 and the right block 32 onto the base plate 1.

[0104] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A hot junction bending tool for thermocouple junctions, characterized in that, The first bending mechanism and the second bending mechanism are arranged on the bottom plate and do not interfere with each other. The first bending mechanism is provided with a first profiling structure, wherein the first profiling structure is provided with a first bending portion. The second bending mechanism is provided with a second profiling structure, wherein the second profiling structure is provided with a second bending portion. The first bending mechanism comprises a pressing plate, a first positioning shaft and a locking screw.

2. The hot junction bending tooling for thermocouple junctions according to claim 1, wherein, The first positioning shaft is arranged on the bottom plate, and the center line of the first positioning shaft is perpendicular to the bottom plate. The pressing plate is provided with an open slot, the opening direction of the open slot faces the first positioning shaft, the first positioning shaft is the first profiling structure, and the first bending portion is a part of the cylindrical surface of the first positioning shaft facing the open slot. The pressing plate is detachably connected to the bottom plate through the locking screw. The pressing plate is provided with a positioning slot.

3. The hot junction bending tooling for thermocouple junctions of claim 2, wherein, The locking screw is limited to a knurled high head screw, wherein the circumferential surface of the head part of the knurled high head screw is provided with knurled patterns, and the screw rod part of the knurled high head screw passes through the positioning slot and is connected to the bottom plate. The bottom plate is provided with two working slots.

4. The hot junction bending tooling for thermocouple junctions of claim 2, wherein, Each working slot is recessed in the bottom plate to form a blind slot structure, and the first positioning shaft is arranged between the two working slots. The second bending mechanism comprises a mandrel mechanism, a left block, a right block and a second positioning shaft.

5. The hot junction bending tooling for thermocouple junctions of claim 1, wherein: The mandrel mechanism and the second positioning shaft are arranged on the bottom plate, and the center line of the mandrel mechanism and the center line of the second positioning shaft are spaced apart and perpendicular to the bottom plate. The left block and the right block form a rotating pair with the mandrel mechanism. The left block, the right block and the second positioning shaft jointly form the second profiling structure, wherein the left block and the right block are respectively provided with the second bending portion. The left block is provided with a first working part facing the right block, the first working part is specifically processed into a first step part, a first circular arc part and a first straight line part, the first circular arc part is located between the first step part and the first straight line part, the spacing between the first step part and the second positioning shaft is smaller than the spacing between the first straight line part and the second positioning shaft, and the intersection of the first circular arc part and the first straight line part is one of the second bending portions.

6. The hot junction bending tooling for thermocouple junctions of claim 5, wherein, The right block is provided with a second working part facing the left block, the second working part is specifically processed into a second step part, a second circular arc part and a second straight line part, the second circular arc part is located between the second step part and the second straight line part, the spacing between the second step part and the second positioning shaft is smaller than the spacing between the second straight line part and the second positioning shaft, and the intersection of the second circular arc part and the second straight line part is the other of the second bending portions. ​ The first working part and the second working part have a first state adjusted to a maximum included angle and a second state adjusted to a minimum included angle, wherein when the first working part and the second working part are in the second state, the profile of the first circular arc part and the profile of the second circular arc part are spaced from each other and respectively coincide with the profile of the same reference circle, and the first straight line part and the second straight line part are parallel to each other and spaced.

7. The hot junction bending tooling for thermocouple junctions of claim 5 wherein, The left block and the right block are respectively provided with handles.

8. The hot junction bending tooling for thermocouple junctions of claim 5, wherein, The mandrel mechanism comprises a mandrel, a hexagonal nut, a washer and a fixing nut. The mandrel comprises a shaft, a first positioning part and a second positioning part, the first positioning part and the second positioning part protrude from the shaft along the radial direction of the shaft, wherein the mandrel is provided with external threads, the first positioning part and the second positioning part are respectively in a cylindrical shape, the diameter of the first positioning part is greater than the diameter of the second positioning part; The bottom plate is provided with a positioning through hole and a mounting groove, the positioning through hole penetrates through the bottom plate, the mounting groove is recessed in the bottom plate and is in a blind groove shape, the positioning through hole is coaxial with the mounting groove and communicates with the mounting groove, the mandrel is respectively inserted into the positioning through hole and the mounting groove, the second positioning part is in clearance fit with the positioning through hole, and the fixing nut is connected to the mandrel in the mounting groove; The left block and the right block are respectively provided with mounting through holes, each mounting through hole is in clearance fit with the first positioning part; The hexagonal nut is connected with the mandrel, wherein the hexagonal nut and the second bending mechanism are provided with the washer therebetween.

Images