Gate spot welding die

Abstract

A kind of grid spot welding mould, including mandrel, be equipped with cone on mandrel, positioning sleeve is equipped with on mandrel near one end of cone, positioning sleeve is connected by pin shaft with mandrel, outer sleeve is equipped with in the middle of mandrel, outer sleeve is combined by multiple sector segments and is equipped with several longitudinal grooves and a spiral groove on outer sleeve periphery, outer sleeve one end is equipped with with the taper hole of cooperation with cone, positioning pin is fixed on each sector segment of outer sleeve, positioning sleeve is uniformly distributed with strip hole on circumference, positioning pin outer end is respectively inserted into strip hole;Tapered sleeve is inserted into the other end center hole of outer sleeve, adjusting nut is connected by screw thread on mandrel near one end of tapered sleeve, adjusting nut one end is connected with tapered sleeve;Positioning ring is equipped with in the other end port of outer sleeve, positioning ring is respectively connected by screw with sector segment, respectively set waist-shaped hole on positioning ring corresponding screw place.This mould can adjust the size of grid specification, facilitate demould, can improve production efficiency.

Description

Technical Field

[0001] This utility model relates to a mold, and more particularly to a gate spot welding mold. Background Technology

[0002] As the core component that determines the performance of a vacuum tube, the gate must meet the requirements of electrical parameter adaptability, structural stability and mechanical strength at high temperatures of 1000~1400℃, and have excellent radiation heat dissipation characteristics (low heat absorption to reduce operating temperature), low thermal electron and secondary electron emission, and its structure and process are suitable for mass production and cost control.

[0003] Existing cage-type gate spot welding molds mostly use a cylindrical core mold with several longitudinal and circumferential grooves evenly distributed on the core mold. During use, the longitudinal and transverse wires of the gate are placed into the circumferential and longitudinal grooves respectively for spot welding.

[0004] This type of mold can only be used to make one type of cage gate. In order to make gates of various specifications, multiple sizes of molds must be prepared. Moreover, demolding is difficult and requires special environments such as hydrogen furnaces or liquid nitrogen, which not only increases equipment investment and maintenance costs, but also poses safety hazards. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a gate spot welding mold that can adjust the gate size, facilitate demolding, and improve production efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A gate spot welding mold includes a mandrel with a tapered body on the mandrel. A positioning sleeve is fitted on the mandrel near one end of the tapered body. The positioning sleeve is connected to the mandrel by a radially arranged pin. An outer mold sleeve is fitted in the middle of the mandrel. The outer mold sleeve is composed of multiple fan-shaped segments and has several longitudinal grooves and a spiral groove on its outer edge. One end of the outer mold sleeve has a tapered hole that mates with the tapered body and is inserted between the tapered body and the positioning sleeve. A positioning pin is fixed on each segment of the outer mold sleeve corresponding to one end of the tapered body. Multiple strip holes are evenly distributed around the circumference of the positioning sleeve, and the outer ends of the positioning pins are inserted into the corresponding strip holes. A tapered sleeve is inserted into the center hole at the other end of the outer mold sleeve. The tapered sleeve fits into the center hole through a tapered surface and is fitted onto the mandrel. An adjusting nut is threaded onto the mandrel near the tapered sleeve. One end of the adjusting nut is engaged with the tapered sleeve to adjust the outer diameter of the outer mold sleeve. A positioning ring is provided inside the port at the other end of the outer mold sleeve. The positioning ring is connected to multiple segments by screws. A waist-shaped hole is provided on the positioning ring at each screw location, which is arranged radially for positioning the adjusted outer mold sleeve.

[0007] As a further preferred embodiment, a U-shaped groove is provided at the outer end of the tapered sleeve, and an annular retaining edge is provided at the inner end of the adjusting nut, which is then engaged in the U-shaped groove by the annular retaining edge.

[0008] As a further preferred embodiment, the inner end of the positioning pin is fitted into the corresponding pin hole on each segment by a tight fit.

[0009] As a further preferred embodiment, an annular boss is provided on the outer edge of the outer mold sleeve near the positioning sleeve. The outer edge of the annular boss is a conical surface and has the same taper as the conical hole. A demolding sleeve is fitted outside the annular boss. The inner hole of the demolding sleeve is stepped and one end fits with the conical surface of the annular boss. The other end of the demolding sleeve is fitted onto the positioning sleeve with a clearance fit and is fixed to the positioning sleeve by a pin to facilitate demolding.

[0010] As a further preferred embodiment, the mandrel and the tapered body are an integral structure, and a central hole is provided on the mandrel at one end corresponding to the adjusting nut, so as to facilitate installation on the machine tool.

[0011] The beneficial effects of this utility model are as follows: 1. Since the outer mold sleeve is composed of multiple fan-shaped segments, one end of the outer mold sleeve has a tapered hole that mates with the tapered body and is inserted between the tapered body and the positioning sleeve. A tapered sleeve is inserted into the center hole at the other end of the outer mold sleeve. An adjusting nut is threadedly connected to one end of the mandrel near the tapered sleeve. One end of the adjusting nut is engaged with the tapered sleeve. Therefore, by rotating the adjusting nut, the outer diameter of the outer mold sleeve composed of multiple segments can be adjusted. Thus, the size of the cage gate to be processed can be adjusted, thereby processing cage gates of various specifications.

[0012] 2. After processing, the outer diameter of the outer mold sleeve can be reduced by rotating the adjusting nut, and demolding can be carried out. Demolding is convenient and quick, which can improve production efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 yes Figure 1 Top view.

[0015] Figure 3 yes Figure 2 AA sectional view.

[0016] Figure 4 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 5 yes Figure 1 The right view.

[0018] In the diagram: 1. Mandrel; 2. Positioning sleeve; 201. Strip hole; 3. Pin; 4. Conical body; 5. Positioning pin; 6. Outer mold sleeve; 601. Split; 602. Annular boss; 603. Longitudinal groove; 604. Spiral groove; 7. Conical sleeve; 8. Positioning ring; 9. Adjusting nut; 901. Annular retaining edge; 10. Screw; 11. Demolding sleeve; 12. Pin. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] like Figure 1-5 As shown, the present invention relates to a gate spot welding mold, which includes a stepped mandrel 1 and a conical body 4 provided on one end of the mandrel 1. The mandrel 1 and the conical body 4 are integral structures to facilitate processing.

[0021] A positioning sleeve 2 is fitted onto the mandrel 1 near the conical body 4 with a clearance fit. The positioning sleeve 2 is stepped and fixedly connected to the mandrel 1 by a radially arranged pin 3. The larger diameter end of the positioning sleeve 2 fits over the outside of the conical body 4. An outer mold sleeve 6 is fitted in the middle of the mandrel 1. The outer mold sleeve 6 is composed of multiple fan-shaped segments 601 with gaps between adjacent fan-shaped segments. In this embodiment, four fan-shaped segments are used as an example. Several longitudinal grooves 603 and a spiral groove 604 are provided on the outer edge of the outer mold sleeve 6. The longitudinal grooves 603 are evenly distributed along the circumference of the outer mold sleeve 6, and the spiral groove 604 is arranged along the thread direction.

[0022] One end of the outer mold sleeve 6 is provided with a tapered hole that mates with the tapered body 4 and this end is inserted between the tapered body 4 and the positioning sleeve 2. On each segment of the outer mold sleeve 6, a positioning pin 5 is fixed at one end corresponding to the tapered body 4. The inner end of the positioning pin 5 is tightly fitted into the corresponding pin hole on each segment. Multiple strip holes 201 are evenly distributed around the circumference of the positioning sleeve 2. The strip holes 201 correspond one-to-one with the positioning pins 5 and are fitted with a clearance. The outer ends of the positioning pins 5 are respectively inserted into the corresponding strip holes 201 to drive the outer mold sleeve 6 to rotate.

[0023] A tapered sleeve 7 is inserted into the central hole at the other end of the outer mold sleeve 6. The tapered sleeve 7 fits into the central hole via a tapered surface and is fitted onto the mandrel 1. An adjusting nut 9 is threadedly connected to one end of the mandrel 1 near the tapered sleeve 7. One end of the adjusting nut 9 engages with the tapered sleeve 7 to adjust the outer diameter of the outer mold sleeve 6. A U-shaped groove is provided radially at the outer end of the tapered sleeve 7, and an annular retaining edge 901 is provided at the inner end of the adjusting nut 9. The adjusting nut 9 is inserted through the annular retaining edge and engaged in the U-shaped groove.

[0024] A positioning ring 8 is provided inside the port at the other end of the outer mold sleeve 6. The positioning ring 8 is sleeved on the outside of the tapered sleeve 7 and connected to multiple segments by screws 10. A waist-shaped hole 801 arranged radially is provided on the positioning ring 8 corresponding to each screw 10 for positioning the adjusted outer mold sleeve 6.

[0025] An annular boss 602 is provided on the outer edge of the outer mold sleeve 6 near the positioning sleeve 2. The outer edge of the annular boss 602 is conical and has the same taper as the conical hole. A demolding sleeve 11 is fitted over the annular boss 602. The inner hole of the demolding sleeve 11 is stepped, and one end mates with the conical surface of the annular boss 602. The other end of the demolding sleeve 11 is fitted onto the positioning sleeve 2 with a clearance fit and is fixed to the positioning sleeve 2 by circumferentially distributed pins 12 to facilitate demolding. The inner end of the pins 12 is threaded to the positioning sleeve 2.

[0026] A center hole is provided on one end of the mandrel 1 corresponding to the adjusting nut 9, so as to facilitate installation on the center of the machine tool.

[0027] When using it, the steps are as follows: 1. Secure the end of the mandrel 1 near the positioning sleeve 2 onto the special machine tool, put the grid cap on the outer mold sleeve 6 corresponding to the adjusting nut 9, and place the center hole of the other end of the mandrel 1 against the center of the machine tool. 2. Cut the molybdenum sheet and wrap it around the outer mold sleeve 6. After spot welding the two ends together, a gate connecting cylinder is formed. Rotate the adjusting nut 9 to push against the tapered sleeve 7 inside the outer mold sleeve 6, thereby opening the outer mold sleeve 6 until the outer diameter of the outer mold sleeve 6 is equivalent to the center circle size of the longitudinal grid wire of the gate to be processed. 3. Insert longitudinal grid wires into the longitudinal grooves 603 of the outer mold sleeve 6, and limit them by the leather sleeve on the outer edge of the outer mold sleeve 6; and use a spot welding machine to spot weld one end of the installed longitudinal grid wire to the gate connecting cylinder respectively. 4. Then control the machine tool to rotate slowly, and slowly wind the transverse grid wire into the spiral groove 604 of the outer mold sleeve 6. At the same time, use a spot welding machine to spot weld the transverse grid wire and the longitudinal grid wire at each intersection point. During welding, gradually move the sleeve towards the tip of the machine tool until the sleeve is removed from the outer mold sleeve 6. 5. Then, use a spot welding machine to weld the other end of the longitudinal grid wires to the grid cap to complete the fabrication of the grid. 6. Finally, loosen the adjusting nut 9, which will move the tapered sleeve 7 outward, thereby loosening and reducing the outer diameter of the outer mold sleeve 6; loosen the pin on the demolding sleeve 11, and the gate can be removed from the mold through the demolding sleeve 11.

[0028] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A gate spot welding mold, comprising a mandrel, characterized in that: A tapered body is provided on the mandrel, and a positioning sleeve is fitted on the mandrel near one end of the tapered body. The positioning sleeve is connected to the mandrel by a radially arranged pin. An outer mold sleeve is fitted in the middle of the mandrel. The outer mold sleeve is composed of multiple fan-shaped segments and has several longitudinal grooves and a spiral groove on its outer edge. One end of the outer mold sleeve has a tapered hole that mates with the tapered body and is inserted between the tapered body and the positioning sleeve. A positioning pin is fixed on each segment of the outer mold sleeve corresponding to one end of the tapered body. Multiple strip holes are evenly distributed around the circumference of the positioning sleeve, and the outer ends of the positioning pins are inserted into the corresponding strip holes. A tapered sleeve is inserted into the center hole at the other end of the outer mold sleeve. The tapered sleeve fits into the center hole through a tapered surface and is fitted onto the mandrel. An adjusting nut is threaded onto the mandrel near the tapered sleeve. One end of the adjusting nut is engaged with the tapered sleeve to adjust the outer diameter of the outer mold sleeve. A positioning ring is provided inside the port at the other end of the outer mold sleeve. The positioning ring is connected to multiple segments by screws. A waist-shaped hole is provided on the positioning ring at each screw location, which is arranged radially for positioning the adjusted outer mold sleeve.

2. The gate spot welding mold according to claim 1, characterized in that: A U-shaped groove is provided at the outer end of the tapered sleeve, and an annular retaining edge is provided at the inner end of the adjusting nut, which is engaged in the U-shaped groove by the annular retaining edge.

3. The gate spot welding mold according to claim 1, characterized in that: The inner end of the positioning pin is tightly fitted into the corresponding pin hole on each segment.

4. The gate spot welding mold according to claim 1, characterized in that: An annular boss is provided on the outer edge of the outer mold sleeve near the positioning sleeve. The outer edge of the annular boss is a conical surface and has the same taper as the conical hole. A demolding sleeve is fitted on the outside of the annular boss. The inner hole of the demolding sleeve is stepped and one end fits with the conical surface of the annular boss. The other end of the demolding sleeve is fitted onto the positioning sleeve with a clearance fit and is fixed to the positioning sleeve with a pin to facilitate demolding.

5. The gate spot welding mold according to claim 1, characterized in that: The mandrel and the tapered body are an integral structure, and a center hole is provided on the mandrel at one end corresponding to the adjusting nut, so as to facilitate installation on the machine tool.

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